OHAUS PX523-E Pioneer PX Series Balances Instruction Manual

: June 16, 2024
: Ohaus

Table of Contents

OHAUS PX523-E Pioneer PX Series Balances
Product Information
FAQs
INTRODUCTION
INSTALLATION
OPERATION
APPLICATIONS
MENU SETTINGS
LEGAL FOR TRADE
Printing
MAINTENANCE
TECHNICAL DATA
SOFTWARE UPDATES
LIMITED WARRANTY
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

OHAUS PX523-E Pioneer PX Series Balances

Product Information

Specifications

Model: PX Series Balance
Capacity: Available in capacities from 82 grams to 8200 grams
Operation Controls: 2-line backlit display

Introduction

The PX balance is a precision weighing instrument that will provide you with years of service if properly cared for. PX balances are available in capacities from 82 grams to 8200 grams.

Features

2-line backlit display
6 weighing applications
Many other features

Safety Precautions

It is important to follow these safety precautions to ensure safe and proper usage of the PX Series Balance:

Pay attention to signal warnings and symbols provided in the manual.
Ignoring safety notes may lead to personal injury, damage to the instrument, malfunctions, and false results.
Follow the warning symbols for general hazards, electrical shock hazards, alternating current, and direct current.

Installation

To install the PX Series Balance, follow these steps:

Choose a stable and level surface for the balance.
Ensure that the power supply is compatible with the balance’s requirements.
Place the balance on the selected surface and connect it to the power supply.
Turn on the balance using the power button.

Operation

To operate the PX Series Balance, follow these steps:

Ensure that the balance is properly installed and powered on.
Place the object to be weighed on the weighing platform.
Wait for the balance to stabilize and display the weight measurement.
Read the weight measurement from the 2-line backlit display.

Applications

The PX Series Balance can be used in various applications, including:

Laboratories
Pharmaceutical industry
Food industry
Chemical industry
Research and development

Menu Settings

The PX Series Balance provides various menu settings to customize its operation. Refer to the manual’s “Menu Settings” section (EN-24) for detailed instructions on accessing and adjusting these settings.

Maintenance

To ensure proper maintenance of the PX Series Balance, follow these guidelines:

Regularly clean the weighing platform using a soft cloth or brush.
Avoid exposing the balance to extreme temperatures or humidity.
Calibrate the balance periodically as recommended in the manual.

Technical Data

The technical data for the PX Series Balance can be found in the manual’s “Technical Data” section (EN-41). It includes information such as:

Accuracy
Repeatability
Linearity
Operating temperature range
Power supply

Software Updates

The PX Series Balance may have software updates available to enhance its functionality. Refer to the manual’s “Software Updates” section (EN-49) for instructions on updating the balance’s software.

Compliance

The PX Series Balance complies with relevant industry standards and regulations. Refer to the manual’s “Compliance” section (EN-50) for detailed information on compliance certifications and declarations.

FAQs

Q: How often should I calibrate the PX Series Balance?
- A: It is recommended to calibrate the balance periodically, preferably before each use or according to your specific application requirements.
Q: Can the PX Series Balance be used in a humid environment?
- A: While the balance is designed to withstand normal laboratory conditions, it is best to avoid exposing it to extreme humidity or moisture.
Q: Can the PX Series Balance measure weights in different units?
- A: Yes, the balance offers various unit options for weight measurement. Refer to the manual’s “Menu Settings” section (EN-24) for instructions on adjusting the unit settings.

Pioneer PX Series Balances Instruction Manual

EN-3

INTRODUCTION

1.1 Description
The PX balance is a precision weighing instrument that will provide you with years of service if properly cared for. PX balances are available in capacities from 82 grams to 8200 grams.

1.2 Features
Operation Controls: 2-line backlit display, with 6 weighing applications and many other features.

1.3 Definition of Signal Warnings and Symbols
Safety notes are marked with signal words and warning symbols. These show safety issues and warnings. Ignoring the safety notes may lead to personal injury, damage to the instrument, malfunctions and false results.

WARNING
CAUTION
Attention Note

For a hazardous situation with medium risk, possibly resulting in injuries or death if not avoided. For a hazardous situation with low risk, resulting in damage to the device or the property or in loss of data, or injuries if not avoided. For important information about the product For useful information about the product

Warning Symbols

General Hazard

Electrical Shock Hazard

Alternating Current

Direct Current

1.4 Safety Precautions
CAUTION: Read all safety warnings before installing, making connections, or servicing this equipment. Failure to comply with these warnings could result in personal injury and/or property damage. Retain all
instructions for future reference.
Verify that the AC adapter’s input voltage range and plug type are compatible with the local AC main power
supply.
Make sure that the power cord does not pose a potential obstacle or tripping hazard. Do not position the balance such that it is difficult to reach the power connection. The balance is for indoor use only. Do not operate the equipment in hazardous or unstable environments. Operate the equipment only under ambient conditions specified in these instructions. Do not drop loads on the pan. Use the balance only in dry locations. Disconnect the equipment from the power supply when cleaning. Use only approved accessories and peripherals. Service should only be performed by authorized personnel.

EN-4

PX Series Balance

INSTALLATION

2.1 Unpacking
Carefully remove your PX balance and each of its components from the package. The included components vary depending on the balance model (see the list below). Save the packaging to ensure safe storage and transport. Please read the manual completely before installing and using the PX balance to avoid incorrect operation.
Components included: Balance Power adapter + Attaching plug Stainless steel pan Pan support (for 0.1 g / 0.01 g model only) Warrenty card

2.2 Select the Location
Avoid heat sources, rapid temperature changes, air current or excessive vibrations. Allow sufficient space.

2.3 Leveling
Be sure the balance is level before it is used or after its location is changed. The PX balance has a level bubble in a small round window beside the display. To level the balance, adjust the 4 Leveling Feet until the bubble is centered in the circle. Please refer to Figure 2-1 for leveling.

Figure 2-1. Leveling

PX Series Balance

EN-5

2.4 Connecting Power and Acclimating the Balance
Connect the DC output connector to the power receptacle on the rear of the balance. Then connect the AC adapter plug to a suitable electrical outlet.

Acclimating
It is suggested that the balance should not be used until it has been connected to power and acclimated to the environment for a certain period of time. In the case of balance with the precision above 0.1 mg, the acclimation time should be 1.5 hours; in the case of balance with the precision of 0.01 mg, the acclimation time should be more than 4 hours.

2.5 Connecting the Interface
The PX balance has two data interfaces, RS232 and USB. Use the RS-232 port to connect either to a computer or a printer with a standard (straight-through) serial cable. Use the USB port to connect to a computer with a USB 2.0 Type A to Type B cable.

Interface connections on the rear of the balance

USB

RS232

USBUsed to connect to PC only RS232Used to connect to PC or Printer Note: For Connecting, Configuring and Testing the Printer / Computer Interface, see the Printing section.

2.6 Initial Calibration
When the PX balance is first installed, or when it is moved to another location, it must be calibrated to ensure accurate weighing results. PX balances are classified into two categories, InCal models and ExCal models. InCal models have a built-in calibration mechanism which can calibrate the balance automatically and does not require the use of external calibration masses. If preferred, InCal models can also be manually calibrated with external masses. ExCal models are calibrated with external masses. Make sure to have the appropriate calibration masses available before beginning calibration.

EN-6

OPERATION

3.1 Overview of Display, Home Screen
The PX balance has a 2-line backlit display.
CONTROLS

PX Series Balance

CONTROL FUNCTIONS

Button

Primary Function
(Short Press)

On / Zero
If the Indicator is Off, turns on the Indicator.
If Indicator is On, sets zero.

Off

Secondary

Function Zeroing current

(Press and

value.

Hold)

Print

Function

Sends the current Operation is

displayed value to

dependent on the

the serial interface.

application mode.

Unit

Mode

Changes weighing Changes

units.

application mode.

Menu Function
(Short Press)

Yes

No

Back

Accepts the current Rejects the current Reverts back to

(blinking) setting on

(blinking) setting

previous menu

the display.

on the display.

item.

Increments a value Decrements a

being entered.

value being

entered.

Tare
Performs tare operation.
Menu-Cal
Enters the main menu. Calibration is the first submenu.
Views the preset Tare value. Exit
Immediately exits the submenu.
Aborts a calibration in progress.

PX Series Balance MAIN APPLICATION SCREEN

EN-7

Net (NET) Stability (*) Negative (-) Centre of Zero (>0<) Pre-tare (PT)
Instructional Messages

Result Field: Information varies by application
Unit

3.2 Principal Functions and Main Menu

Weighing:

Press Zero to set the display to zero. Place an object on the pan. The display indicates the gross weight.

Taring:

With no load on the pan, press Zero to set the display to zero. Place an empty container on the pan and press Tare. Add material to the container and its net weight is displayed. After the container and the objects are removed, the load will be displayed as a negative number. Press
Tare to clear.

Zero:

Press Zero to zero the balance.

Dot-matrix Display:

The relevant data in the specific application mode are shown in the dot-matrix display area.

3.3 Overview of Parts and Features Draft Shield Models

Pan Level Indicator

Adjustable Foot

USB Device Security Switch RS232

Power Input

3.4 Overview of Parts and Features Non-Draft Shield Models

Pan

Adjustable Foot

USB Security Switch RS232 Power Input Device

EN-8

PX Series Balance

APPLICATIONS

The PX balance can be operated in 6 application modes by long pressing the Function / Mode button.

4.1 Weighing
Note: Before using any application, be sure the balance has been leveled and calibrated.
Use this application to determine the weight of objects in the selected unit of measure.
Weighing 1. Press Tare or Zero if necessary to begin. 2. Press and hold the Function / Mode button to select Weighing (this application is the default). 3. Place objects on the pan to display the weight. Once the reading is stable, the * will appear. 4. The resulting value is displayed in the active unit of measure.

Item Settings To view or adjust the current settings.
· Capacity Bar: When set to On, the capacity bar is displayed in the reference field. The capacity will not display when the balance is set to zero.
· Weighing Units: Change the displayed unit. See Section 5.4 for more information. · Filter Level: Change Filtering level. See Section 5.3.2 for more information. · GLP Data: See Section 5.7 for more information. · Print Settings: Change printing settings. See Section 7 for more information.
4.2 Parts Counting
Note: Before using any application, be sure the balance has been leveled and calibrated. The minimum piece weight should be no less than 0.1d.
Use this application to count samples of uniform weight.
Parts Counting
1. Press Tare or Zero if necessary to begin. 2. Press and hold the Function / Mode button until
Parts Counting appears.

PX Series Balance
3. After confirmation by pressing Yes, the message “Clear APW?” will appear on the screen.
4. If the APW of the last Parts Counting operation needs to be kept, press No when the message “Clear APW?” displays.
5. Press Yes, and the message “Sample size 10” will display with the numeral “10” (default) flashing.
6. Confirm the sample size by pressing Yes, and place 10 samples on the pan to display the weight. Press No or Back to increase or decrease the value as desired.
7. Press the Function / Mode button so that the weight of the 10 samples is used to establish the average piece weight (APW). The display will show 10 pieces.
8. To view the piece weight or the total weight, press the Function / Mode button.
9. Place additional objects on the pan, and the corresponding number of pieces will display.
Item Settings Sample: The sample size ranges from 1 to 1000. The default value is 10. Note: To ensure accurate counting, the minimum piece weight should be no less than 0.1d.

EN-9

EN-10

PX Series Balance

APW Optimization: Improving counting accuracy by re-calculating the piece weight automatically as parts are added.
APW Optimization occurs only when the number of pieces added to the pan is between one and three times the number already on the pan.

Print Settings: Changing printing setup. See Section 7 for more information.

4.3 Percent Weighing
Note: Before using any application, be sure the balance has been leveled and calibrated. Use Percent Weighing to display the weight of a test object as a percentage of a pre-established reference sample. The default (or last) reference weight is displayed.
Percent Weighing 1. Press and hold the Function / Mode button until Percent Weighing appears.

2. After confirmation by pressing Yes, the message “Clear reference?” will appear on the screen.
3. Press Yes, and then the message “Place sample” will display.
4. Place the reference sample on the pan to display the weight. When the reading is stable, the * will appear.
5. Press the Function / Mode button so that the weight of the reference sample is stored in memory. The display will show 100%.

PX Series Balance
6. Remove the reference sample and place the test object on the pan. The ratio of the test object to the reference sample weight is displayed as a percentage.
7. To view the reference sample weight or the test object weight, press the Function / Mode button.

EN-11

Item Settings Note: If the previously established reference sample weight needs to be kept, press No when the message “Clear reference?” displays.
Printing Setup: Changing printing setup. See Section 7 for more information.
4.4 Dynamic Weighing
Note: Before using any application, be sure the balance has been leveled and calibrated. Clear the pan before beginning a new Dynamic Weighing cycle. Use this application to weigh an unstable load, such as a moving animal.
Dynamic Weighing 1. Press and hold the Function / Mode button until Dynamic Weighing appears. 2. After confirmation by pressing Yes, the message “Change parameter?” will appear on the screen.

3. Press Yes, and then the message “Average time 10 s” will display with the numeral “10” flashing. Press No or Back to increase or decrease the value as desired.

EN-12
4. Confirm the weighing time by pressing Yes, and the message “Ready” will display at the lower left of the screen.

PX Series Balance

5. Place the dynamic object on the pan. The balance begins a countdown (averaging process). During the countdown, the screen shows the time remaining.
6. When the countdown ends, the result line is displayed and held.
7. After the dynamic object is removed, the weight will be automatically set to zero, and the balance will return to the status of “Ready”.
Item Settings 1. Averaging Time: Set the averaging time to a value between 1 and 15 seconds. Default is 10 seconds. 2. Printing Setup: Changing printing setup. See Section 7 for more information.
4.5 Density Determination
Note: Before using any application, be sure the balance has been leveled and calibrated. Use this application to determine an object’s density. A Density Determination Kit, Part Number 80253384, is designed to be used with PX series balances. Illustrations in this procedure refer to the density kit, however, you may use whatever lab apparatus that will suit the requirements for density measurements. A built in reference density table for water at temperatures between 10ºC and 30.9ºC is included in the balance software. Review this entire section before attempting density measurements.

PX Series Balance

EN-13

1. Glass beaker 3. Forceps 5. Holder for floating solids 7. Precision thermometer with holder

2. Bracket 4. Platforms 6. Holder for non floating solids 8. Sinker 10ml (optional equipment)

When making density measurements, the material should weigh at least 10.0 mg on an analytical balance and 100 mg on a precision balance. Balance Preparation with Ohaus Density Kit (Optional) Allow the balance to warm up sufficiently before making measurements. Open either the left or right side door of the balance and remove the Pan as shown. Insert the Bracket into the balance where the Pan was removed. The Equalizing Washer is not used.

EN-14

PX Series Balance

Place the Support into position over the bracket making sure the Support does not make contact with the Bracket as shown in illustration.

Install beaker on support as shown. NOTE: Beaker and thermometer are not supplied as part of the density kit. The density Q is the quotient of the mass m and the volume V.
Density determinations are performed by using Archimedes’ principle. This principle states that every solid body immersed in a fluid loses weight by an amount equal to that of the fluid it displaces. The density table for water is included in the Discovery balance software. The density of a solid is determined with the aid of a liquid whose density, Qo, is known (water is used as an auxiliary liquid). The solid is weighed in air (A) and then in the auxiliary liquid (B). The density Q can be calculated from the two weighings as follows:
The balance allows direct determination of the buoyancy P (P =A – B) and consequently the above formula can be simplified:
Q = Density of the solid A = Weight of the solid in air B = Weight of the solid in the auxiliary liquid Q0 = Density of the auxiliary liquid at a given temperature (this value depends on the temperature). The density table for water is included in Discovery balances. P = Buoyancy of the solid in the auxiliary liquid (corresponds to A-B).

PX Series Balance

EN-15

Place the solid in the Weighing Pan on the Weigh Below Hook in the liquid as shown. Ensure that there are no air bubbles on the solid to be weighed. Close the draft shield doors and weigh the solid (buoyancy P). The display indicates the density in grams/cc.

Solid Density Determinations for items Less Density Than Water For density determination of solids with a density less than 1 g/CM3, the bottom of the Weigh Below Hook for solids must be used as it holds the solid body below the surface of the auxiliary liquid. If the buoyancy of the solid is greater than the weight of the Weigh Below Hook, the Weigh Below Hook must be weighted by placing an additional mass on the submerged part of the Weigh Below Hook as shown. Weigh the sample in air first as explained in the previous procedure. After loading the additional mass, tare the balance and start the weighing again. Wait until the balance has reached stability and note the displayed weight P (buoyancy of the solid).

Improving the Accuracy of the Result of Solid Density The following tips should help you improve the accuracy of the results in the density determination of solids.
Temperature Solids are generally so insensitive to temperature fluctuations that the corresponding density changes are of no consequence. However, as work is performed with an auxiliary liquid in the density determination of solids, their temperature must be taken into account as the temperature has a greater effect with liquids and causes density changes in the order of magnitude 0.5 to 1% per °C. This effect is already apparent in the third decimal place of the result. To obtain accurate results, we recommend that you always take the temperature of the auxiliary liquid into account on all density determinations.
Air Buoyancy 1 CM3 of air weighs approximately 1.2 mg (depending on the physical condition). As a consequence, in the weighing in air, each solid experiences buoyancy of this magnitude (the so-called “air buoyancy”) per cm3 of its volume.

However, the air buoyancy must be taken into account only when a result is required with an accuracy of 3 to 4 decimal places. To correct for this, the air buoyancy (0.0012 g per cm3 volume of the body) is added to the calculated result:
Calculated density + 0.0012 g/cm3 air buoyancy = effective density
Surface tension of the auxiliary liquid Adhesion of the liquid to the Weigh Below Hook causes an apparent weight increase of up 3 mg. As the Weigh Below Hook is immersed in the auxiliary liquid in both weighings of the solid (in air and in the auxiliary liquid), the influence of the apparent weight increase can be neglected because the balance is tared before every measurement.
To reduce the effect of air bubbles and to ensure the greatest possible accuracy, use a few drops of a wetting agent (not supplied) and add them to the auxiliary liquid.

Liquid Density Determinations The density of a liquid can be made using a sinker of known volume. The sinker (P/N: 83034024) is weighed in air and then in the liquid whose density is to be determined, The density, Q, can be determined from the two weighings as follows:

Q = Density of the liquid A = Weight of the sinker in air B = Weight of the sinker in liquid V = Volume of the sinker P = Buoyancy of the sinker in the liquid (P = A-B)

EN-16

PX Series Balance

In DENSITY SETUP, set Mode to Liquid Density and enter sinker volume in cc’s. After weighing the sinker in air and then weighing the sinker immersed in liquid, the balance calculates the density of the liquid and is displayed in grams/cc. See illustrations below for placement of the sinker. When the sinker is immersed in the liquid, it must not come into contact with the bottom of the beaker.

Porous Material Density Determinations The density of a porous (oil impregnated part) can be made with the balance. Weigh the part (dry) prior to oil impregnation and record its weight. You must also know the density value of the oil to be used in immersing the part before starting. In this procedure, you will follow the method for solid density measurements using water. Enter the dry weight of the porous material and the density of oil used to impregnate the part.
To Determine Wet Density Wet density of the sample can be calculated by following the normal Solid Density procedure using the oil impregnated part. Before density measurements can be made, the density mode of operation must be set up in the Menu, Mode Submenu. It is in the Mode Sub-menu where solid, porous, water or auxiliary liquids are selected. After the basic parameters have been set, the balance density operation is further determined in the APPL DENSITY menu. This menu allows the setting of Density, Temperature, Dry Weight of Porous Material, Sinker Volume and Density of Oil.
Operation Method Press and hold the Function / Mode button until the Density appears on the screen. After confirmation by pressing Yes, the message “Change parameter?” will display on the screen. The settings can be kept or changed as desired. Item Settings:
Sample Type: Solid, Liquid Auxiliary Liquid: Water, Alcohol, Other Porous Material: Off, On Water Temperature: 20 (by default) Alcohol Temperature: 20 (by default) Volume (of Calibrated Sinker): 10 ml (by default) Weight (of Porous Material): 5.000 g Oil Density: 0.80000 g / cm3
Four types of density determination can be made:
1. Solid more density than the auxiliary liquid 2. Solid less density than the auxiliary liquid 3. Liquid density 4. Porous material (impregnated with oil)
The following are the operating procedures for determining density of solid, liquid and porous material with water as the auxiliary liquid. Other auxiliary liquids are also applicable for density determination.

PX Series Balance
4.5.1 Measuring the Density of a Sinking Solid Using Water
Press and hold the Function / Mode button until Density appears. Press Yes to initiate the Density Determination.
Item Settings: Sample type: Solid Auxiliary Liquid: Water Porous Material: Off Water Temperature: Measure the actual water temperature using a precision thermometer.
The water temperature is 20.0 by default. Press No or Back to increase or decrease the value of temperature. The balance calculates water density based on the water temperature value entered.
1. Weigh the sample in air using the balance and the density determination kit. When the * (symbol of stability) appears, press the Function / Mode button to confirm the weight of the sample in the air.
2. Weigh the sample submerged in the liquid using the balance and the density determination kit. Note: Lower the sample down into the liquid until it is fully submerged.

EN-17

EN-18
3. Press the Function / Mode button to get the density of the sample. After completion of the test, press the Function / Mode button to test a new sample.

PX Series Balance

4.5.2 Measuring the Density of a floating Solid Using Water
1. Press and hold the Function / Mode button until Density
appears. Press Yes to enter the Density Determination.

2. In determining density with the balance, the balance
setup and density determination procedures are basically the same for a floating solid and a non-floating solid except for the necessary holder (as shown in the figure) to be used for density determination.
3. After completion of the test, press the Function / Mode
button to test a new sample. Note: Lower the sample down into the liquid until it is fully submerged.

Holder for non-floating solids

Holder for floating solids

4.5.3 Measuring the Density of a Solid Using an Auxiliary Liquid other than Water
1. Press and hold the Function / Mode button until Density appears. Press Yes to enter the Density Determination.

PX Series Balance Item Settings:
Sample type: Solid Auxiliary Liquid: Other Porous Material: Off
Set the density of the auxiliary liquid: 2. The default value of the auxiliary liquid is 1.00000 g/cm3. 3. Press No or Back to increase or decrease the value in
accordance with the actual density of the auxiliary liquid.
4. See Section 4.5.1 and Section 4.5.2 for the specific procedures for density determination.
5. Press the Function / Mode button to display the density of the sample.
6. After completion of the test, press the Function / Mode button to test a new sample.
4.5.4 Measuring the Density of a Liquid Using a Calibrated Sinker
Press and hold the Function / Mode button until Density appears. Press Yes to enter the Density Determination.

EN-19

EN-20 Item Settings: Sample Type: Liquid Volume: The calibrated sinker has a default volume of 10.0 ml, which can be increased or decreased by pressing No or Back.
After setting the volume, press Yes to begin the weighing. Note: when the Density Type is set to Liquid, the Liquid type and Porous material selections are disabled.
1. Weigh the calibrated sinker in the air with the balance and the density determination kit. When the (symbol of stability) appears, press the Function / Mode button to confirm the weight of the calibrated sinker in the air.
2. Weigh the calibrated sinker submerged in the liquid with the balance and the density determination kit. Lower the calibrated sinker down into the liquid until it is fully submerged (1 cm below the surface of the liquid).
3. When the (symbol of stability) appears, press the Function / Mode button to confirm the weight of the calibrated sinker. The density of the liquid is displayed.
4. After completion of the test, press the Function / Mode button to test a new sample.

PX Series Balance

PX Series Balance
4.5.5 Measuring the Density of Porous Material Using Oil
Press and hold the Function / Mode button until Density appears. Press Yes to enter the Density Determination.
Item Settings: Sample type: Solid Auxiliary Liquid: Water Porous Material: On
Set the following parameters by pressing No or Back: Water Temperature Weight Oil Density
Measure the actual water temperature using a precision thermometer. The balance calculates water density based on the water temperature value entered. Note: The weight of the sample and the density of oil must be measured in advance.
1. Weigh the oiled sample in the air with the balance and the density determination kit.
2. When the * (symbol of stability) appears, press the Function / Mode button to confirm the weight of the oiled sample in the air.

EN-21

EN-22
3. Weigh the oiled sample in the liquid with the balance and the density determination kit.
4. When the * (symbol of stability) appears, press the Function / Mode button to confirm the weight of the oiled sample in the liquid. The density of the sample is displayed.
5. After completion of the test, press the Function / Mode button to test a new sample.

PX Series Balance

EN-23

4.6 Additional Features
Weigh Below Note: Ensure the balance has been leveled and calibrated.
The PX balance is equipped with a weigh below hook for weighing below the balance (as shown in the figure below).

Before turning the balance over, remove the pan and draft shield elements (if present) to prevent damage. Do not place the balance on the pan support cone or load cell pins. To use this feature, remove power from the balance, then remove the protective cover for the weigh below opening. Power on the balance, and then use a string or wire to attach items to be weighed.

Weigh Below protective cover

Weigh Below hook

EN-24

PX Series Balance

5.1 Menu Navigation
TABLE 5-1. USER MENU STRUCTURE

Calibration
Internal Cal InCal Adjust
Span Cal Linearity Cal

Setup Language Filter Level
AZT Auto Tare Graduations Date format
Date
Time Format
Time Brightness Auto Dim Capacity Bar Approved
Mode

Units Gram Kilogram Milligram Carat Newton
Pound
Ounce
Ounce Troy
Grain Pennyweight
Momme
Mesghal Hong Kong
Tael Singapore Tael
Tanwan Tael Tical Tola

RS232
Baud Rate Transmission Handshake

Print
Stable Only Numeric Only Single Header
Print To Auto Print
Header
Date and Time
Balance ID
Balance Name User Name Project Name Application Name
Result
Gross Net Tare
Line Feed

GLP
Header 1
Header 2
Header 3
Header 4
Header 5 Balance Name
User Name Project Name

Factory Reset
Reset All

Lockout
Calibration Setup Units RS232 Print
GLP Factory Reset

Note: PX balances are classified into InCal models and ExCal models.

5.1.1 Changing Settings
To change a menu setting, navigate to that setting using the following steps:

Enter the Menu Long press the Menu button to enter the Menu.

Select the Sub-Menu Press No to step between the sub-menus, and press Yes to enter the sub-menu.

Select the Menu Item Press No to step through the Menu Items, and press Yes to enter the displayed Menu Item.

5.2 Calibration
PX balances offer a choice of three calibration methods: Internal Calibration (for InCal models only), Span calibration and Linearity Calibration. Attention: Do not disturb the balance during any calibration.

5.2.1 Calibration Sub-menu (InCal models)
Note: ExCal models only have Span Calibration and Linearity Calibration.

PX Series Balance

EN-25

5.2.2 Internal Calibration (not applicable to ExCal models)
Calibration is accomplished with the internal calibration mass. Internal Calibration can be performed at any time, provided the balance has warmed up to operating temperature and is level. With the Balance turned ON and no load on the pan, the internal calibration can be performed. Alternatively, press the Tare / Menu-Cal button and select Internal Cal to initiate the internal calibration. The screen shows the status, and then returns to the current application after calibration.

5.2.3 InCal Adjust (not applicable to ExCal models)
Use this calibration method to fine tune the effect of the Internal Calibration. Calibration Adjust may be used to adjust the result of the Internal Calibration by +100 divisions.

Note: Before making a calibration adjustment, perform an Internal Calibration. To verify whether an adjustment is needed, place a test mass equal to the span calibration value on the pan and note the difference (in divisions) between the nominal mass value and the actual balance reading. If the difference is within +/- division, calibration adjustment is not required. If the difference exceeds +/-1 division, calibration adjustment is recommended.

Example:

Expected weight reading:

200.000 (Test mass value)

Actual weight reading: 200.014

Difference in gram:

0.014

Difference in division:

14 (InCal Adjust value)

To perform a Calibration Adjustment, select InCal Adjustment from the list of Calibration Menu; enter the value (positive or negative divisions) to match the difference noted earlier in the procedure. Recalibrate using Internal Calibration. After calibration, place the test mass on the pan and verify that the mass value now matches the displayed value. If not, repeat the procedure until Internal Calibration reading agrees with the test mass. Once completed, the balance stores the Adjustment value and the display returns to the current application.

5.2.4 Span Calibration
Span calibration uses two calibration points, one at zero load and the other at specified full load (span). For detailed calibration mass information, please see the specification tables in section 9.1. With the balance turned ON and no load on the pan, Span Calibration can be performed. The best accuracy is achieved using the mass closest to the full span value.

Steps for span calibration
1. Press and hold the Tare / Menu-Cal button, and the Calibration Menu will display.

EN-26 2. Press Yes to enter the Calibration Menu. To change the calibration mode, press No until Span Cal (span calibration) is displayed.
3. Press Yes to begin the span calibration.

PX Series Balance

4. The calibration masses value will be shown in the screen. After the display shows “Place weights” and “100.000 g”, place weight(s) of 100 g on the pan for calibration. To change to the calibration point of half full capacity (e.g. 50 g), press the Function / Mode button. After the screen shows “Place weights” and “50.000 g”, place weight(s) of 50 g on the pan for calibration.
5. Remove the weight from the pan.
6. Once the span calibration is completed successfully, “Calibration done” will display. Press any button to return to the previous screen.
5.2.5 Linearity Calibration
Linearity calibration uses three calibration points, one at zero load and the others at specified loads. For detailed calibration mass information, please see the specification tables in section 9.1. With no load on the scale, Linearity Calibration can be performed. The balance captures the zero point, and then prompts for the next weight.

PX Series Balance Continue to follow the instructions on the display until the calibration is completed. Steps for linearity calibration
1. Press and hold the Tare / Menu-Cal button, and the Calibration Menu will display.
2. Press Yes to enter the Calibration Menu. To change the calibration mode, press No until Linearity Cal (linearity calibration) is displayed.
3. Press Yes to begin the linearity calibration.

EN-27

4. Calibration masses value will be shown in the screen. After the display shows “Place weights” and “50.0000 g”, place weight(s) of 50 g on the pan for calibration.
5. Remove the weight(s) of 50 g from the pan. After a while, “100.0000 g” will be displayed on the screen. Please place weight(s) of 100 g on the pan for calibration.

EN-28
6. Once the linearity calibration is completed successfully, “Linearity done” will display. Press any button to return to the previous screen.

PX Series Balance

5.3 Balance Setup
Enter this sub-menu to customize balance functionality. Note: The factory default settings are shown below in bold.
5.3.1 Language
Set the language displayed for menus and displayed messages.
English Chinese Japanese Korean

5.3.2 Filter Level
Set the amount of signal filtering.

Low Medium High

= faster stabilization time with less stability. = normal stabilization time with normal stability. = slower stabilization time with more stability.

5.3.3 AZT (Auto Zero Tracking)
Set the automatic zero tracking functionality.

Off = disabled. 0.5 d = display maintains zero up to a drift of 0.5 graduation per second. 1 d = display maintains zero up to a drift of 1 graduation per second. 3 d = display maintains zero up to a drift of 3 graduations per second.

5.3.4 Auto Tare
Set the automatic tare.

Off = disabled. On = enabled. Note: “Place container” will be displayed when Automatic Tare is set to On.

PX Series Balance

EN-29

5.3.5 Graduations
Set the displayed readability of the balance.
1 Division = standard readability. 10 Divisions = readability is increased by a factor of 10. For example, if the standard readability is 0.01g, selecting 10 Divisions will result in a displayed reading of 0.1 g.

5.3.6 Date Format
Set the current date format.

YYYY/MM/DD MM/DD/YYYY DD/MM/YYYY

5.3.7 Date Setup
Set the date in the current date format. For example, if the date format is MM/DD/YYYY, the date could be set as “06/22/2017 Thu”.

5.3.8 Time Format
Set the current time format.

24HR 12HR
5.3.9 Time Setup
Set the time in the current time format.
For example, if the time format is 24HR, the time could be set as 08:00:00.
5.3.10 Brightness
Set the brightness of the display.
Low Medium High
5.3.11 Auto Dim
Set whether the balance automatically turns off the display backlight of the display.
Off = disabled 10 minutes = become dim if there is no motion for 10 minutes 20 minutes = become dim if there is no motion for 20 minutes 30 minutes = become dim if there is no motion for 30 minutes
5.3.12 Capacity Bar
Off = disabled On = enabled When the capacity is set On, a capacity bar will display at the bottom of the screen. The capacity bar will roughly show the current weight as a percentage of balance capacity. When the display is at zero, the capacity bar will not display.

EN-30

PX Series Balance

5.3.13 Approved Mode
Use this menu to set the Legal for Trade status.
Off = standard operation. On = operation complies with Legal Metrology regulations.
Note: When Approved Mode is set to On, the menu settings are affected as follows:

Calibration Menu: For InCal models, only Internal Calibration is available. All other functions are hidden.

Balance Setup Menu:
Filter Level is locked at the current setting. Auto Zero Tracking is limited to 0.5 Division and Off. The selected setting is locked. Auto Tare is locked at current setting. Graduations are forced to 1 Division and the menu item is hidden.

Communication Menu (Communication->Print Settings->Print Output): Stable Weight Only is locked On. Numeric Value Only is locked Off.

Communication Menu (Communication->Print Settings->Auto Print): Auto print mode selections are limited to Off, On Stability, and Interval. Continuous is not available.

Lockout Menu: Menu is hidden

Note: The security switch located at the rear of the balance must be in the locked position to set Approved Mode to On. The security switch must be in the unlocked position to set Approved Mode to Off. See Section 6.

5.4 Weighing Units
Enter this sub-menu to activate the desired units of measure.

PX balances provide a choice of 21 units, which are all set On by default. Note: Due to national laws, the balance may not include some of the units of measure listed.

Display g kg t mg ug ct N lb oz ozt GN

Unit Gram Kilogram Ton Milligram Microgram Carat Newton Pound Ounce Troy ounce Grain

Display dwt mo msg tl H tl S tl T tcl tola baht lboz

Unit Pennyweight Momme Mesghal HK tael SG tael TW tael Tical Tola Baht lb:oz

PX Series Balance
Changing Weighing Units
1. Press and hold the Print / Unit button until the Unit Menu is displayed.
2. The default unit is gram (g). To change the unit, press No to advance to the next unit.
3. Press Yes to set the unit displayed to the weighing unit.

EN-31

Defining Custom Unit Set Custom to On in the Unit menu to enable and define the Custom Unit. The Custom Unit is defined by entering three parameters, Factor, Exponent and LSD (least significant digit). Define the Custom Unit as follows:
1. Determine how many custom units there are in 1 gram. 2. Convert the value to scientific notation, e.g. m x 10n. 3. Enter the value of m as the Factor setting. 4. Enter the value of n as the Exponent setting. 5. Enter the amount that the Custom Unit steps by as the LSD setting.
Enter the Factor and the Exponent and LSD.

EN-32
Custom Unit = Conversion Factor x Grams. The LSD is the value by which the displayed weight is incremented or decremented.

PX Series Balance

Note: The conversion factor is used by the balance to convert grams to the custom weighing unit and is defined by entering a factor and an exponent. The factor is a value between 0.1000000 and 1.999999 inclusive. For example: One cup of chemical = 0.5643834×1 g, the factor should be set 0.5643834.

The exponent moves the decimal point of the factor to the right for positive values or to the left for negative values. For example: One cup of chemical = 10 g, the exponent should be set 2.

The LSD is the value by which weight is incremented or decremented.

LSD Result

1

Display counts by 1

5

Display counts by 5

10

Display counts by 10

…

For example, if the displayed digital is 0.56 for one cup of chemical, the LSD should be set 100.
5.5 RS232 Interface Setup
Enter this sub-menu to customize RS232 standard settings. Data may be output to either a printer or a PC.
5.5.1 Baud Rate
Set the baud rate (bits per second). 1200 = 1200 bps 2400 = 2400 bps 4800 = 4800 bps 9600 = 9600 bps 19200 = 19200 bps 38400 = 38400 bps
5.5.2 Transmission
Set the data bits, stop bit, and parity.
8-NO-1 = 8 data bits, no parity, stop bit 1 8-NO-2 = 8 data bits, no parity, stop bit 2 7-EVEN-1 = 7 data bits, even parity, stop bit 1 7-EVEN-2 = 7 data bits, even parity, stop bit 2 7-NO-1 = 7 data bits, no parity, stop bit 1

PX Series Balance

7-NO-2 = 7 data bits, no parity, stop bit 2 7-ODD-1 = 7 data bits, odd parity, stop bit 1 7-ODD-2 = 7 data bits, odd parity, stop bit 2
5.5.3 Handshake
Set the flow control method.

None Xon-Xoff
Hardware

= no handshaking = XON/XOFF handshaking
= hardware handshaking

5.6 Print Settings
Enter this sub-menu to customize data transfer settings.
5.6.1 Stable Only
Off = values are printed immediately, regardless of stability. On = values are printed only when the stability criteria are met.

5.6.2 Numeric Only
Off = All selected results are printed. On = Only numeric data values are printed.

5.6.3 Single Header
Off = Headers will be printed for every print requirement. On = Headers will be printed once a day.

5.6.4 Print To
PC = print data to a PC Printer = print data to a printer

5.6.5 Auto Print

Off On Stability1 Print Interval2
Continuous

= disabled = printing occurs each time the stability criteria are met.
= printing occurs at the defined time interval.
= printing occurs continuously.

1When On Stability is selected, set the conditions for printing.

Load = Prints when the displayed load is stable. Load and Zero = Prints when the displayed load and zero readings are stable.

2When Print Interval is selected, set the time interval using the numeric keypad.

Settings of 1 to 3600 seconds are available. Default is 0.

5.6.6 Header
On = the header is printed. Off = the header is not printed.

5.6.7 Date and Time
On = the date and the time are printed. Off = neither the date nor the time is printed.

EN-33

EN-34
5.6.8 Balance ID
On = the balance ID is printed. Off = the balance ID is not printed.
5.6.9 Balance Name
On = the balance name is printed. Off = the balance name is not printed.
5.6.10 User Name
On = the user name is printed. Off = the user name is not printed.
5.6.11 Project Name
On = the project name is printed. Off = the project name is not printed.
5.6.12 Application Name
On = the application name is printed. Off = the application name is not printed.
5.6.13 Result
On = the weighing result is printed. Off = the weighing result is not printed.
5.6.14 Gross
On = the gross weight is printed. Off = the gross weight is not printed.
5.6.15 Net
On = the net weight is printed. Off = the net weight is not printed.
5.6.16 Tare
On = the tare weight is printed. Off = the tare weight is not printed.
5.6.17 Line Feed
1 Line = move the paper up one line after printing. 4 Lines = move the paper up four lines after printing.

PX Series Balance

PX Series Balance
5.7 GLP
Enter this menu to set the Good Laboratory Practices (GLP).
5.7.1 Header
Enables the printing of GLP headings. There are up to 5 headings available. Alphanumeric settings up to 25 characters are available for each Header setting
5.7.2 Balance Name
Set the balance name. Alphanumeric settings up to 16 characters are available.
5.7.3 User Name
Set the user name. Alphanumeric settings up to 16 characters are available. The default is blank.
5.7.4 Project Name
Set the project name. Alphanumeric settings up to 16 characters are available. The default is blank.
5.8 Factory Reset
Use this sub-menu to reset the all menu settings to their Factory default settings.
Reset All = resets all menus to their factory default settings. Exit = return to application main screen without resetting any menus.
5.9 Lockout
Use this sub-menu to lock/unlock certain menus. Off = the menu is unlocked On = the menu is locked

EN-35

EN-36

PX Series Balance

LEGAL FOR TRADE

(LFT)

When the balance is used in trade or a legally controlled application it must be set up, verified and sealed in accordance with local weights and measures regulations. It is the responsibility of the purchaser to ensure that all pertinent legal requirements are met.

6.1 Settings
Before the verification and sealing perform the following steps:
1. Verify the menu settings meet the local weights and measures regulations. 2. Perform a calibration as explained in Section 5. 3. Set the position of the security switch as shown in Section 6.3.
Note: When the security switch is set on the following menu settings cannot be changed: calibration, setup, mode, unit and lockout. For more details, see Section 5.3.13.

6.2 Verification
The local weights and measures official or authorized service agent must perform the verification procedure.
6.3 Securing the Menu
A slide switch is used to secure the Lock menu settings. When the switch is set to the On position, the Lock menu settings may be viewed but not changed. This switch is located behind the Base.
Set the position of the switch to ON by sliding the external Lock Switch to LOCKED as shown in the figure below.

Note: This switch is also used in conjunction with the Legal for Trade menu item. When the Legal for Trade menu is set to ON, the switch must be set to the On position to prevent calibration and changes to metrologically significant settings.
6.4 Sealing Access to the Balance Settings
The local weights and measures official or authorized service agent must apply a security seal to prevent tampering with the settings. Refer to the illustrations below for the sealing methods.

Un-locked

Locked with Paper Seal

Locked with Wire Seal

PX Series Balance

EN-37

Printing

7.1 Connecting, Configuring and Testing the Printer / Computer Interface
Use the built-in RS-232 Port to connect either to a computer or a printer. If connecting to a computer, use HyperTerminal or similar software like SPDC described below. (Find HyperTerminal under Accessories/Communications in Windows XP.)
Connect to the computer with a standard (straight-through) serial cable.
Choose New Connection, “connect using” COM1 (or available COM port).
Select Baud=9600; Parity=8 None; Stop=1; Handshaking=None. Click OK.
Choose Properties/Settings, then ASCII Setup. Check boxes as illustrated: (Send line ends…; Echo typed characters…; Wrap lines…)
Use RS232 Interface Commands (Section 9.6.1) to control the balance from a PC.

SPDC Software
The Serial Port Data Collection / SPDC software is provided by Ohaus and can be used on operating systems that do not have the HyperTerminal software mentioned above. SPDC software can preliminarily collect and transfer the data to Microsoft files (such as Excel, Word, etc.).
Choose the export file type and export file path and then press Run as shown below.

Note: The latest SPDC software support English and Chinese language and can be downloaded from the Ohaus’ website. For more information, refer to the SPDC Data Collection Instruction Manual.

EN-38

PX Series Balance

7.2 Output Format
The Result Data, and G/N/T data, is output in the following format.

Field: Length:

Label 1 Space 2

Weight 3 Space2 Unit 4

Space Stability 5

Space

G/N 6

Space

Term. Characters 7

1

11

1

5

1

1 3 0

8

Note: 1. The length of the label field is not fixed.
2. Each field is followed by a single delimiting space (ASCII 32).
3. The Weight field is 11 right justified characters. If the value is negative, the ‘’ character is located at the immediate left of the most significant digit.
4. The Unit field contains the unit of measure abbreviation up to 5 characters, right justified.
5. The Stability field contains the “?” character if the weight reading is not stable. The Stability field and the following Space field are omitted if the weight reading is stable.
6. The G/N field contains the net or gross indication. For net weights, the field contains “N”. For gross weights, the field contains “G”.
7. The Termination Characters field contains CRLF, Four CRLF or Form Feed (ASCII 12), depending on the LINE FEED menu setting.
8. When Numeric Only is set On, only the Weight Field is printed, left- aligned.

7.3 Printout Examples
Examples for each Application are shown with all items turned ON in the Print menu. The default values for Header lines 1-5 are also shown.

BASIC WEIGHING

PART COUNTING

PERCENT WEIGHING

Header 1

Header 2

Header 3

Header 4

Header 5

07/19/2017 17:56:23

Balance ID: B234567890

Balance Name: PX5202

User Name:

Project Name:

Weighing

49.98 g

Gross:

49.98 g G

Net:

49.98 g N

Tare:

0.00 g T

Header 1

Header 2

Header 3

Header 4

Header 5

07/19/2017 17:57:19

Balance ID: B234567890

Balance Name: PX5202

User Name:

Project Name:

Parts Counting

Quantity: 4999 PCS

Gross:

49.99 g G

Net:

49.99 g N

Tare:

0.00 g T

APW: 0.010 g

Sample Size: 10 PCS

Header 1

Header 2

Header 3

Header 4

Header 5

07/19/2017 17:57:19

Balance ID: B234567890

Balance Name: PX223/E

User Name:

Project Name:

Percent Weighing

Percentage: 10.156 % N

Gross:

23.361 g G

Net:

10.156 g N

Tare:

13.205 g T

Reference weight: 100.000 g

Signature: ____ Verified By: ____

PX Series Balance DYNAMIC WEIGHING

Header 1

Header 2

Header 3

Header 4

Header 5

07/19/2017 18:00:12

Balance ID: B234567890

Balance Name: PX5202

User Name:

Project Name:

Dynamic Weighing

Final weight: 49.99 g

Gross:

50.06 g G

Net:

50.06 g N

Tare:

0.00 g T

Averaging Time: 10 s

Signature: ____ Verified By: ____

DENSITY
(Density Type=Solid, auxiliary liquid=water,porous material=on)

Header 1

Header 2

Header 3

Header 4

Header 5

07/19/2017 18:03:23

Balance ID: B234567890

Balance Name: PX5202

User Name:

Project Name:

Density

Density: 0.0345 g/cm³

Gross:

49.99 g G

Net:

49.99 g N

Tare:

0.00 g T

Oiled Weight: 199.89 g

Weight in liquid: 49.98 g

Auxiliary liquid: Water

liquid density: 0.9982 g/cm³

Temp.: 20.0

Porous: On

Oil density: 0.8000 g/cm³

Dry Weight: 5.00 g

Signature: ____ Verified By: ____

EN-39
DENSITY (Density Type=liquid, sinker
volume=10ml)

Header 1

Header 2

Header 3

Header 4

Header 5

07/19/2017 18:05:17

Balance ID: B234567890

Balance Name: PX5202

User Name:

Project Name:

Density

Density: 14.9820 g/cm³

Gross:

49.98 g G

Net:

49.98 g N

Tare:

0.00 g T

Weight in air: 199.88 g

Weight in liquid: 50.05 g

Sinker Volume: 10.0 ml

Signature: ____ Verified By: ____

INTERNAL CALIBRATION
-OHAUS07/26/2017 05:16:53 Balance ID: Balance Name: PX2202 User Name: Project Name: —Internal Calibration–Calibration is done. Difference weight: 0.00 g
Signature: ____ Verified By: ____

SPAN CALIBRATION
-OHAUS03/19/2000 04:51:46 Balance ID: Balance Name: PX2202ZH/E User Name: Project Name: —Span Calibration–Calibration is done. Reference weight: 2000.00 g Actual weight: 2000.22 g Difference weight: 0.22 g Weight ID: ____
Signature: ____ Verified By: ____

LINEARITY CALIBRATION
-OHAUS01/01/2000 17:30:47 Balance ID: Balance Name: PX5202M User Name: Project Name: —Linearity Calibration–Calibration is done.
Signature: ____ Verified By: ____

EN-40

PX Series Balance

MAINTENANCE

8.1 Calibration
Periodically verify calibration by placing an accurate weight on the balance and viewing the result. If calibration is required, refer to section 5.2 for instructions.

8.2 Cleaning
WARNING: Disconnect the balance from the power supply before cleaning. Make sure that no liquid enters the interior of the balance.

Clean the balance at regular intervals. Housing surfaces may be cleaned with a lint-free cloth slightly dampened with water or a mild cleaning agent. Glass surfaces may be cleaned with a commercial glass cleaner. Attention: Do not use solvents, harsh chemicals, ammonia or abrasive cleaning agents.

8.3 Troubleshooting

TABLE 8-1. TROUBLESHOOTING

Symptom / Display

Possible Cause

Balance will not turn on No power to the balance

Poor accuracy

Improper calibration Unstable environment

Cannot calibrate

Calibration Menu locked
Approved Mode set to on
Unstable environment Incorrect calibration masses

Cannot change menu settings Low Reference weight
Invalid Piece Weight
Operation Timeout
Err 8.3 Err 8.4 ——

Sub-menu locked Approved Mode set to on Reference weight too small The weight on the pan is too small to define a valid reference weight. Average piece weight is too small
Weight reading is not stable
Weight reading exceeds overload limit. Weight reading below underload limit. Busy (tare, zero, printing, waiting for a stable weight)

Remedy Verify connection and voltage Perform calibration Move balance to suitable location Turn Calibration menu lock off Turn Approved Mode off Move balance to suitable location Use correct calibration masses Unlock sub-menu Turn Approved Mode off Increase sample size
Increase average piece weight Move balance to suitable location Remove weight from the pan Re-install the pan Wait until completion

8.4 Service Information
If the troubleshooting section does not resolve your problem, contact an Authorized Ohaus Service Agent. Please visit our website www.ohaus.com to locate the Ohaus office nearest you.

PX Series Balance

EN-41

TECHNICAL DATA

9.1 Specifications
Ambient conditions Indoor use only Altitude: Up to 2000 m Specified Temperature range: 10°C to 30°C Humidity: maximum relative humidity 80% for temperatures up to 30°C, decreasing linearly to 50% relative
humidity at 40°C Operability is assured at ambient temperatures between 5°C and 40°C Mains supply voltage fluctuations: up to ±10% of the nominal voltage Installation category II Pollution degree: 2 Supply voltage: 12V0.5A

Materials Bottom Housing: Die-cast Aluminum, Painted Top Housing: Plastic (HIPS) Weighing Platforms: Stainless steel Draft Shield: Glass, plastic (HIPS) Feet: Plastic (ABS)

EN-42

PX Series Balance

InCal Model ExCal Model Capacity (g)
Readability d (g)
Repeatability (STDEV) (g)
Linearity (g) Stabilization Time Typical (s) Sensitivity Temperature Drift (PPM/K) Typical Minimum Weight USP (USP K=2,U=0.10%) Optimized Min-Weight (g) (USP, u=0.10%, k=2) SRP0.41d*
Units
Applications
Platform Size (diameter, mm) Span Calibration Points (g)
Linearity Calibration Points (g)
Tare Range
Power Supply
Assembled Dimensions (W x D x H) (mm) Communication Operating Temperature Range Storage Temperature Range Storage Conditions Net Weight Shipping Weight Shipping Dimensions (W x D x H) (mm)

PX85
82 0.00001 0.00002 ±0.0001
10

TABLE 9-1. SPECIFICATIONS

PX125D PX225D PX84

PX84/E

52/120

82/220

82

0.00001/ 0.00001/

0.0001

0.00002/ 0.00002/

0.0001

±0.0001 ±0.0001 ±0.0002

10

4

PX124 PX124/E
120 0.0001
0.0001 ±0.0002
4

PX224 PX224/E
220 0.0001
0.0001 ±0.0002
4

PX163 PX163/E
160 0.001
0.001 ±0.002
2

±0.8

±3

±8

20 mg

200 mg 200 mg 200 mg

2 g

9 mg

82 mg

0.82 g

Milligram, Gram, Kilogram, Ounce, Pound, Carat, Pennyweight, Ounce Troy, Grain, Newton, Hong Kong Tael, Singapore Tael, Taiwan Tael, Momme, Tical (MM), Mesghal, Tola (India), 1 Custom unit
Basic Weighing, Parts Counting, Percent Weighing, Dynamic Weighing, Density Determination

80

90

120

40, 80
20, 40, 60, 80

50, 100 100, 200 40, 80

50, 100 100, 200

50, 75, 100

50, 100, 150, 200

20, 40, 60, 80

50, 75, 100

50, 100, 150, 200

To capacity by subtraction Power input: 100-240V ~ 200mA 50-60Hz 12-18VA
Power output: 12 VDC 0.5A
209 x 321 x 309

80, 160 40,
80,120,16 0

15°C to 25°C

RS232, USB

10°C to 30°C

Humidity: maximum relative humidity 80 % for temperatures up to 30°C, decreasing linearly to 50% relative humidity at 40°C
-10°C to 60°C, humidity 10% to 90%, without condensation
10 lb / 4.5 kg 15.4 lb / 7 kg 507 x 387 x 531

Note:
*SRP refers to the standard deviation for n replicate weighings (n10).

PX Series Balance

EN-43

InCal Model ExCal Model Capacity (g) Readability d (g) Repeatability (STDEV) (g) Linearity (g) Stabilization Time Typical (s) Sensitivity Temperature Drift (PPM/K) Typical Minimum Weight USP (USP K=2,U=0.10%) Optimized Min-Weight (g) (USP, u=0.10%, k=2) SRP0.41d*
Units
Applications
Platform Size (diameter, mm) Span Calibration Points (g)
Linearity Calibration Points (g)
Tare Range
Power Supply
Assembled Dimensions (W x D x H) (mm) Communication Operating Temperature Range Storage Temperature Range Storage Conditions Net Weight
Shipping Weight
Shipping Dimensions (W x D x H) (mm)

PX223 PX223/E
220 0.001

TABLE 9-2. SPECIFICATIONS (continued)

PX323

PX423

PX523

PX822

PX323/E PX423/E PX523/E PX822/E

320

420

520

820

0.001

0.01

0.001

0.01

±0.002 ±0.002

±0.002

±0.02

2

1

PX1602 PX1602/E
1600 0.01
0.01
±0.02
1

PX2202 PX2202/E
2200 0.01
0.01
±0.02
1

±9

±3

±6

2 g

20 g

0.82 g

8.2 g

Milligram, Gram, Kilogram, Ounce, Pound, Carat, Pennyweight, Ounce Troy, Grain, Newton, Hong Kong Tael, Singapore Tael, Taiwan Tael, Momme, Tical(MM), Mesghal,
Tola(India), 1 Custom unit Basic Weighing, Parts Counting, Percent Weighing, Dynamic Weighing, Density
Determination

120

180

100, 200
50, 100, 150, 200

150, 300 200, 400 250, 500 400, 800 750, 1500

100, 200, 300

100, 200, 200, 300, 200, 400, 300, 400 400, 500 600, 800

500, 1000, 1500

To capacity by subtraction
Power input: 100-240V ~ 200mA 50-60Hz 12-18VA Power output: 12 VDC 0.5A

1000, 2000 500, 1000, 1500, 2000

209 x 321 x 309

209 x 321 x 98

RS232, USB

10°C to 30°C

Humidity: maximum relative humidity 80% for temperatures up to 30°C,

decreasing linearly to 50% relative humidity at 40°C

-10°C to 60°C, humidity 10% to 90%, without condensation

10 lb / 4.5 kg

7.7 lb / 3.5 kg

15.4 lb / 7 kg

11 lb / 5 kg

507 x 387 x 531

550 x 385 x 291

Note: *SRP refers to the standard deviation for n replicate weighings (n10).

EN-44

PX Series Balance

InCal Model ExCal Model Capacity (g) Readability d (g) Repeatability (STDEV) (g) Linearity (g) Stabilization Time Typical (s) Sensitivity Temperature Drift (PPM/K) Typical Minimum Weight USP (USP K=2,U=0.10%) Optimized MinWeight (g) (USP, u=0.10%, k=2) SRP0.41d*
Units
Applications
Platform Size (diameter, mm) Span Calibration Points (g) Linearity Calibration Points (g) Tare Range

TABLE 9-3. SPECIFICATIONS (continued)

PX3202 PX4202 PX5202 PX2201 PX4201

PX3202/E PX4202/E PX5202/E PX2201/E PX4201/E

3200

4200

5200

2200

4200

0.01

0.1

0.01

0.1

±0.02

±0.2

1

PX6201/E 6200 0.1
0.1
±0.2
1

PX8201/E 8200 0.1
0.1
±0.2
1

±3

±10

20 g

200 g

8.2 g

82 g

Milligram, Gram, Kilogram, Ounce, Pound, Carat, Pennyweight, Ounce Troy, Grain, Newton, Hong Kong Tael, Singapore Tael, Taiwan Tael, Momme, Tical (MM), Mesghal,
Tola (India), 1 Custom unit
Basic Weighing, Parts Counting, Percent Weighing, Dynamic Weighing, Density Determination

180

1500, 3000 2000, 4000 2500, 5000 1000, 2000 2000, 4000 3000, 6000 4000, 8000

1000, 2000, 1000, 2000, 2000, 3000, 500, 1000, 1000, 2000, 2000, 4000, 2000, 4000, 3000 3000, 4000 4000, 5000 1500, 2000 3000, 4000 6000 6000, 8000

To capacity by subtraction

Power Supply

Power input: 100-240V ~ 200mA 50-60Hz 12-18VA Power output: 12 VDC 0.5A

Assembled Dimensions (W x D x H) (mm) Communication Operating Temperature Range Storage Temperature Range
Storage Conditions
Net Weight Shipping Weight
Shipping Dimensions (W x D x H) (mm)

209 x 321 x 98
RS232, USB
10°C to 30°C
Humidity: maximum relative humidity 80 % for temperatures up to 30°C, decreasing linearly to 50% relative humidity at 40°C
-10°C to 60°C, humidity 10% to 90%, without condensation 7.7 lb / 3.5 kg 11 lb / 5 kg
550 x 385 x 291

Note: *SRP refers to the standard deviation for n replicate weighings (n10).

PX Series Balance

EN-45

InCal Approval Model
Capacity (g)
Readability d (g)
Verification Interval e (g)
Class
Repeatability (STDEV) (g)
Linearity (g) Stabilization Time Typical (s) Sensitivity temperature drift (PPM/K) Typical Minimum Weight USP (USP K=2,U=0.10%)
Optimized Min-Weight (g) (USP, u=0.10%, k=2) SRP 0.41d*

PX125DM 52/120 0.00001/ 0.0001 0.001 I 0.00002/ 0.0001 ±0.0001 10
±0.8
20 mg
9 mg

TABLE 9-4. SPECIFICATIONS (continued)

PX124M

PX224M

PX323M

PX523M

PX3202M

120

220

320

520

3200

0.0001

0.001

0.01

0.001

0.01

0.1

I

II

0.0001

0.001

0.01

±0.0002

±0.002

±0.02

PX5202M 5200 0.01 0.1 II 0.01 ±0.02

4

2

1

±3

200 mg

2 g

20 g

82 mg

0.82 g

8.2 g

PX4201M 4200 0.1 0.1 II 0.1 ±0.2 1
±10
200 g
82 g

PX225DM 82/220 0.00001 0.001 I 0.00002/ 0.0001 ±0.0001 10
±0.8
20 mg
9 mg

PX85M 82
0.00001 0.001 I
0.00002 ±0.0001
10
±0.8
20 mg
9 mg

Units

g, mg , ct

g, kg , ct

Applications Platform Size (diameter, mm) Span Calibration Points (g)
Linearity Calibration Points (g)
Tare Range
Power Supply
Assembled Dimensions (W x D x H) (mm) Communication Operating Temperature Range Storage Temperature Range Storage Conditions
Net Weight

Basic Weighing, Parts Counting, Percent Weighing, Dynamic Weighing, Density Determination

80

90

120

180

80

50, 100 50, 75, 100

50, 100
50, 75, 100

100, 200
50, 100, 150, 200

150, 300

250, 500

1500, 3000

2500, 5000

100, 200, 300

200, 300, 400, 500

1000, 2000, 3000

To capacity by subtraction

2000, 3000, 4000, 5000

Power input: 100-240V ~ 200mA 50-60Hz 12-18VA Power output12 VDC 0.5A

209 x 321 x 309

2000, 4000
1000, 2000, 3000, 4000

100, 200
50. 100, 150, 200

209 x 321 x 98

40, 80
20, 40, 60, 80

15°C to 25°C

RS232, USB 10°C to 30°C

15°C to 25°C

Humidity: maximum relative humidity 80% for temperatures up to 30°C, decreasing linearly to 50% relative humidity at 40°C

-10°C to 60°C, humidity 10% to 90%, without condensation

10 lb / 4.5 kg

7.7 lb / 3.5 kg

Shipping Weight

15.4 lb / 7 kg

Shipping Dimensions (W x D x H) (mm)

507 x 387 x 531

Note:

*SRP refers to the standard deviation for n replicate weighings (n10).

11 lb / 5 kg 550 x 385 x 291

EN-46
9.2 Drawings and Dimensions
Fully assembled dimensions

PX Series Balance

Figure 9-1 0.001 g / 0.0001 g model

Figure 9-2 0.01 g / 0.1 g model

9.3 Accessories

TABLE 9-5. ACCESSORIES

DESCRIPTION

PART NUMBER

Auxiliary Display PAD7

80251396

Density Kit

80253384

Calibrated Sinker for Liquid Density Determination

83034024

USB Interface Cable

83021085

Security Device

80850043

RS232 Cable25 pin

80500524

RS232 Cable9 pin

80500525

Dust Cover

30093334

In-use Cover

30372546

Printer SF40A

30064202 (EU); 30064203 (AM)

Power Adapter for Balance

46001724

PX Series Balance
9.4 Communication
9.4.1 Interface Commands
Commands listed in the following table will be acknowledged by the balance.

EN-47

Command Characters
IP P CP SP H Z T xT***
PT ON OFF C IC AC PSN PV x# P# x% P% xRL xT

Function
Immediate Print of displayed weight (stable or unstable). Print displayed weight (stable or unstable). Continuous Print. Print on Stability. Enter Print Header Lines Same as pressing Zero Key Same as pressing Tare Key. Establish a preset Tare value in displayed unit. X = preset tare value. Sending 0T clears tare (if allowed). Prints Tare weight stored in memory. Brings out of Standby Goes to Standby. Begin Span Calibration Begin Internal Calibration, same as trigger from calibration menu. Abort Calibration. Attention: when LFT ON, the operation is not allowed. Print Serial Number. Print terminal software version, base software version and LFT ON (if LFT is set ON). Set Counting APW (x) in grams. (must have APW stored) Print Counting application APW. Set Percent application reference weight (x) in grams. (must have reference weight stored) Print Percent application reference weight. 0 = disable response; 1 = enable response. This command only controls the “OK!” response. Pre-tare the container weight (x) in grams.

EN-48

9.4.2 RS232 (DB9) Pin Connections

Diagram

Type

Interface type

Max. cable length Signal level

Connector Operating mode Transmission mode Transmission code Baud rates
Bits/parity
Stop bits Handshake End-of-line

PX Series Balance
Description Voltage interface conforming to EIA RS-232C/DIN 66020 (CCITT V24/V.28) 15 m Output: +5 V … +15 V (RL = 3 7k) -5 V … -15 V (RL = 3 – 7 k) Input: +3 V … +25 V -3 V … -25 V Sub-D, 9-pole, female Full duplex Bit-serial, asynchronous ASCII 1200, 2400, 4800, 9600, 19200, 38400 (firmware selectable) 7-bit/even, 7-bit/odd, 7-bit/none, 8-bit/none (firmware selectable) Stop bit 1, 2 None, XON/XOFF, RTS/CTS (selectable) Not selectable

9.4.3 USB Interface
The Ohaus USB Interface is a unique solution to the problem of connecting a balance to a computer using a Universal Serial Bus (USB). USB devices are categorized into classes such as disk drives, digital cameras, printers, etc. Balances do not have a commonly used class so the Ohaus USB interface uses a generic interface based on the RS232 serial standard.
Data sent from the balance to a computer is in USB format. The USB data is directed to a virtual port. This port then appears as an RS232 port to the application program.
When sending a command from a computer to the balance, the application program sends a command to the virtual port as if it were an RS232 port. The computer then directs the command from the virtual port to the computers USB connector where the balance is connected. The port receives the USB signal and reacts to the command.

System Requirements PC running Windows 98®, Windows 98SE®, Windows ME®, Windows 2000®, Windows XP®, Windows 7® or Windows 8® (32-bit) or Windows 10®. Available USB port (Type A, 4-pin, female)

PX Series Balance

EN-49

9.4.4 USB Connection
The balance’s USB port terminates with a 4-pin, female, USB Type B connector. A USB Cable (type B/male to type A/male) is required (not supplied).
1. Ensure that the balance is powered on and working properly.
2. Power on the computer and verify that its USB port is enabled and working properly.
3. Plug the cable’s USB connectors into the computer’s USB port and the balance’s USB port. Windows® should detect a USB device and the New Hardware Wizard will be initialized.

Download from Ohaus’ Website

1.The New Hardware Wizard guides you through the required steps to select the driver that is located on the website.
2.After clicking Finish, the virtual port should be ready for use. Windows® typically adds the virtual port in sequence after the highest number COM port. For example, on PC’s equipped with up to 4 COM ports, the virtual port will be COM5.
When using the USB interface with programs that limit the number of COM port designations (e.g. Ohaus MassTracker allows only COM1, 2, 3, & 4), it may be necessary to assign one of these port numbers to the new virtual port.

Example of Windows XP Hardware Wizard

This can be done in the Port Settings of the Device Manager utility, found in the Windows Control Panel.

USB INPUT

The balance will respond to various commands sent via the interface adapter.

Terminate the following commands when with a [CR] or [CRLF]

PX Commands

P

same as pressing Print

SP print stable weight only

IP

immediate print of displayed weight (stable or unstable)

CP Continuous print of weights

T

same as pressing Tare

Z

same as pressing Zero

PV print software version

xT establish a preset Tare value in displayed unit. X = preset tare value.

Sending 0T clears tare (if allowed).

Auto-Print Operation Once Auto-Print is activated in the menu, the balance will send data as required. If there is data in the print buffer the printer will finish printing this data.

SOFTWARE UPDATES

Ohaus is continuously improving its balance software. To obtain the latest release, please contact your Authorized Ohaus Dealer or Ohaus Corporation.

EN-50

PX Series Balance

11. COMPLIANCE
Compliance to the following standards is indicated by the corresponding mark on the product.

Mark

Standard
This product complies with the EU Directives 2014/30/EU (EMC), 2014/35/EU (LVD) and 2014/31/EU (NAWI). The EU Declaration of Conformity is available online at www.ohaus.com/ce

EN 61326-1, AS/NZS 61010-1

CAN/CSA-C22.2 No. 61010-1 UL Std. No. 61010-1

Important notice for verified weighing instruments in the EU When the instrument is used in trade or a legally controlled application it must be set up, verified and sealed in accordance with local weights and measures regulations. It is the responsibility of the purchaser to ensure that all pertinent legal requirements are met. Weighing Instruments verified at the place of manufacture bear the following supplementary metrology marking on the descriptive plate.
Weighing Instruments to be verified in two stages have no supplementary metrology marking on the descriptive plate. The second stage of conformity assessment must be carried out by the applicable weights and measures authorities. If national regulations limit the validity period of the verification, the user of the weighing instrument must strictly observe the re-verification period and inform the weights and measures authorities. As verification requirements vary by jurisdiction, the purchaser should contact their local weights and measures office if they are not familiar with the requirements.
FCC Note This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense.
Industry Canada Note This Class A digital apparatus complies with Canadian ICES-003.
ISO 9001 Registration In 1994, OHAUS Corporation, USA, was awarded a certificate of registration to ISO 9001 by Bureau Veritas Quality International (BVQI), confirming that the OHAUS quality management system is compliant with the ISO 9001 standard’s requirements. On June 21, 2012, OHAUS Corporation, USA, was re-registered to the ISO 9001:2008 standard.
This product complies with the EU Directive 2012/19/EU (WEEE). Please dispose of this product in accordance with local regulations at the collecting point specified for electrical and electronic equipment.
For disposal instructions in Europe, refer to www.ohaus.com/weee

PX Series Balance

EN-51

LIMITED WARRANTY

Ohaus products are warranted against defects in materials and workmanship from the date of delivery through the duration of the warranty period. During the warranty period Ohaus will repair, or, at its option, replace any component(s) that proves to be defective at no charge, provided that the product is returned, freight prepaid, to Ohaus.
This warranty does not apply if the product has been damaged by accident or misuse, exposed to radioactive or corrosive materials, has foreign material penetrating to the inside of the product, or as a result of service or modification by other than Ohaus. In lieu of a properly returned warranty registration card, the warranty period shall begin on the date of shipment to the authorized dealer. No other express or implied warranty is given by Ohaus Corporation. Ohaus Corporation shall not be liable for any consequential damages.
As warranty legislation differs from state to state and country to country, please contact Ohaus or your local Ohaus dealer for further details.

Ohaus Corporation 7 Campus Drive Suite 310 Parsippany, NJ 07054 USA Tel: +1 973 377 9000 Fax: +1 973 944 7177 With offices worldwide / Con oficinas en todo el mundo / Avec des bureaux partout dans le monde / Mit Büros weltweit / Con uffici in tutto il mondo www.ohaus.com
30372560
P/N 30372560 C © 2018 Ohaus Corporation, all rights reserved / todos los derechos reservados / tous droits réservés / alle Rechte vorbehalten / tutti i diritti riservati