OHAUS ST2200-F STARTER 2200 Bench pH Meter Instruction Manual

OHAUS ST2200-F STARTER 2200 Bench pH Meter

Product Information

The STARTER 2200 Bench pH Meter is a device used for measuring pH, mV (millivolts), and temperature. It is designed to provide accurate and reliable results for various applications. The meter comes with a built-in electrode arm for convenient electrode placement and a power adapter for continuous operation. It also has a memory function for storing and recalling readings.

Product Usage Instructions

Installation

1. Connect the power adapter to the meter and plug it into a power outlet.
2. Attach the built-in electrode arm to the meter.
3. Install the electrodes into their respective ports on the meter.

Setup

1. Set the temperature unit and MTC (Manual Temperature Compensation) value according to your requirements.
2. Select a predefined buffer group for calibration purposes.

Calibration

1. Choose the buffer group that matches the solution you will be measuring.
2. Select the appropriate reading mode (pH or mV).
3. Perform a 1-point calibration by immersing the electrode into a standard solution and adjusting the meter to match the expected value.
4. If necessary, perform a 2-point calibration using two different standard solutions to ensure accuracy across a wider range of measurements.

Sample Measurement

1. To measure pH, immerse the electrode into the sample solution and wait for the reading to stabilize.
2. To measure mV, follow the same procedure as pH measurement.

Temperature Measurement
The meter is capable of measuring temperature. Simply immerse the temperature probe into the sample solution and the temperature reading will be displayed.

Using the Memory

1. To store a reading in the memory, press the “Store” button while the desired reading is displayed.
2. To recall a reading from the memory, press the “Recall” button and use the navigation buttons to select the desired reading.
3. To clear the memory, press and hold the “Clear” button for a few seconds.

Maintenance

1. If an error message is displayed, refer to the user manual for troubleshooting steps.
2. Regularly clean and calibrate the meter according to the maintenance instructions provided.
3. Properly maintain and clean the electrodes to ensure accurate measurements.
4. If necessary, use the self-diagnosis feature to identify any potential issues with the meter.
5. To restore the meter to its factory settings, follow the instructions provided.

Authorised OHAUS Australia Dealer

• www.techadv.com.au
• [email protected]

INTRODUCTION

Thank you for choosing OHAUS. Please read the manual completely before using the STARTER 2200 bench pH meter to ensure proper setup, operation and maintenance. STARTER 2200 has an excellent performance/price ratio and is designed with many useful features. Other accessories and various electrodes are available for different applications. Contact your preferred Authorized OHAUS Distributor for details and pricing. Starter 2200 offers many practical features such as:

• Large liquid crystal screen with well-organized display
• Electrode condition icon on the display to show the pH electrode performance
• Recall of last calibration data
• Quick Guide attached under the meter to assist with operation

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.

Signal Words

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

Warning Symbols

• General hazard
• Explosion hazard
• Corrosive hazard

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 input voltage range printed on the data label and the plug type matches thelocal AC power to be used.
• Make sure that the power cord does not pose a potential obstacle or tripping hazard.
• Use the equipment only in dry locations.
• Dry off any liquid spills immediately. The instrument is not watertight.
• When using chemicals and solvents, comply with the instructions of the chemical producerand the general lab safety rules.
• Use only approved accessories and peripherals.
• Operate the equipment only under ambient conditions specified in these instructions.
• Disconnect the equipment from the power supply when cleaning.
• Do not operate the equipment in hazardous or unstable environments.
• Service should only be performed by authorized personnel.

Package contents
The model ST2200-B (basic model) has the following items:

In addition to ST2200-B content, the model ST2200-F package also includes the following:

INSTALLATION

Display and controls Displays

Controls

Installing the builtbuilt-in electrode arm
Install the built-in electrode arm on the left or right sight of the STARTER 2200 meter.

• Remove the rubber hole cover from the meter，insert the metal stick into the hole and screwto fasten it.
• Install the upper electrode arm upon the metal stick from above; adjust it to a desired height.

Installing powepower adapter

• Choose the proper adapter clip, insert into the power adapter slot.
• Use of other power adapters can damage the meter and void the warranty.
• A surge protector or uninterrupted power supply (UPS) is also recommended.

Installing the electrodes
The following diagram depicts ST2200 meter connections.

• DC : Connect the universal power adapter (included with meter) to power the meter
• pH (BNC): Connect a pH electrode, ORP/redox electrode or ion selective electrode (ISE) with BNC connector
• Temp. (Cinch): Connect an ATC temperature probe, such as temperature electrode STTEMP30

SETUP

Set temperature unit and MTC value

Please note:
If a temperature electrode is used, Automatic Temperature Compensation (ATC) and the sample temperature are displayed on the screen. You may then choose to skip MTC setup (below). If the meter does not detect a temperature electrode or one is not used, the meter automatically switches to Manual Temperature Compensation (MTC) mode and MTC appears on the screen. MTC can be set as follows:

• Power the meter on by pressing .

• Press and hold until the setup icon appears on the display and the current temperature unit blinks (°C or °F).

• Press to switch between °C and °F .

• Press to confirm your selection.
  Then

  • Continue with MTC temperature setting by using to adjust temperature compensation accordingly
  • Press to confirm the setting
  • Press to return to the measurement screen.

The default MTC temperature value setting is 25 °C (77°F).

• Note: °C = 5/9 (°F – 32)

Selecting a predefined buffer group

After confirming the MTC compensation temperature value, make the buffer group selection. Use to select a buffer group among 3 buffer groups (4.1.1). Press to confirm the setting or press to leave to return to the measurement screen.

The default buffer group is b1.

STARTER 2200 OPERATION

Calibration

Buffer group
STARTER 2200 can perform 1 or 2-point calibrations. OHAUS recommends conducting a 2 point calibration.

There is 1 buffer group (the US group) stored in the meter. The US buffer group is (at 25°C):

STARTER 2200 automatically corrects for the temperature dependence of the buffer pH values given in the following table.

Reading Mode:

Continuous (Manual End point) mode

• When in Manual Mode, to manually reach a pH measurement or calibration value, you need to press button- when reading is stable and displays : then the sample reading or calibration value freezes,  blinks 3 times and freezes on the display.

Auto-stop Mode

• When in Auto End Point Mode, the meter determines when the reading is stable then displays and locks the reading or calibration value automatically, the reading freezes and blinks 3 times then disappears; blinks 3 times and freezes on the display.
• After powering the meter on, be sure the top of the screen shows  to ensure the meter is in Auto End point Mode.

Mode Switch

• Press and hold to change the End Point Mode.

Performing 1-point calibration

Calibration: pH electrodes need to be calibrated with pH standard buffer solutions before a proper pH measurement can be made. Calibration is to display the correct pH value when the meter receives the mV value signal from the pH electrode.
Slope: the linear coefficient between mV and pH according to theoretical value (e.g. -59.16mV/pH @ 25°C which means 100% slope); Offset: the mV value when pH value is 7.00. (Theoretical value is 0 mV);

• Begin by ensuring the meter is plugged in, the electrode is properly attached and the meter ispowered on by pressing .
• Place the pH electrode in the prepared buffer solution, stir for approximately 5 seconds andwait for an additional 30-60 seconds.
• Press button- , “Cal 1” displays on the top left of the screen and is blinking. The measurement icon appears on the top of the screen, is blinking during calibration.
• When the reading is stable (normally the reading does not change in 5s), press button- to lock the reading and finish 1 point calibration. The buffer value (e.g. pH 7.00) with the temperature is displayed on the screen; the meter can recognize the buffer automatically (auto buffer recognition). The 1-point calibration is finished; now we have 3 options:
• Press button- to store the 1-point calibration data and exit, the offset and the slope are shown on the display for 3 seconds then returns to the measurement screen.
• Press button- to reject the calibration and return to the measurement screen.
• Press button- to do the 2-point calibration.

Note: With the 1-point calibration only the offset is adjusted. If the pH electrode was previously calibrated with 2-point calibration the previously stored slope will remain. Otherwise theoretical 100% slope (-59.16 mV / pH @25°C) will be used.

Note: With the 1-point calibration only the offset is adjusted. If the pH electrode was previously calibrated with 2-point calibration the previously stored slope will remain. Otherwise theoretical 100% slope (-59.16 mV / pH @25°C) will be used.

Performing 2-point calibration

• Perform 1-point calibration as described above.
• Rinse the pH electrode with pure water and wipe off water with a tissue.
•  Place the electrode in the next calibration buffer stir and wait, then press button-
  , “Cal 2” displays on the top left of the screen and is blinking.
  appears and is blinking during calibration.
   When reading is stable (normally the reading does not change in 5s), press button-
  to lock the reading and finish 2-point calibration,
  disappears. The buffer pH value (e.g. 4.01 pH) with the temperature display on the screen.

The 2-point calibration is finished, now we have 2 options:

• Press button- to store the 2-point calibration, the offset and slope are shown on the display for 3 seconds then returns to the measurement screen.
• Press button- to reject the calibration and return to the measurement screen.

Note: The use of a temperature electrode (e.g. STTEMP30) or a pH electrode with a built-in temperature sensor (3-in-1 pH electrode) is recommended. If you use the MTC mode, you should enter the correct temperature value and keep all buffer and sample solutions at the set temperature. (See 3.1)

Sample measurement
Standard procedure of pH measurement is as follows:

• Connect pH (and Temperature if necessary) electrode to the meter and rinse
• Prepare buffer
• Calibrate pH electrode
• Prepare sample & measure
• Record measurement results
• Rinse and properly store pH and other electrodes
• pH electrode preparation: pH electrode should be rinsed with pure water before and after using.

CAUTION Check if the electrode is physically damaged. (Be careful with the glass bulb) The pH electrode should be stored in the storage bottle. After the pH electrode is put into the sample or buffer solution, the user should stir several seconds then wait 30 to 60 seconds for the signal to stabilize, and then press the proper button to operate (calibration or measurement).

• WARNING Do not operate the equipment in hazardous environments. The equipment is not explosion protected.
• WARNING When using chemicals and solvents, comply with the instructions of the chemical producer and the general lab safety rules.

pH measurement

• Place the electrode in the sample, stir 5 seconds then wait 30-60 seconds.
• Press button- to start the pH measurement, appears on the display. is blinking during measurement.
• When the reading is stable, press button- to lock the reading, disappears, thepH value with the temperature is displayed on the screen, you can record the measurementresult. If you want to do another measurement, press button- .

mV measurement

• Press button- to switch between pH measurement mode and mV measurement mode.
• Follow the same procedure as for pH measurement to perform a mV measurement.

Temperature measurement
For better accuracy, we recommend using a temperature electrode or pH electrode with a temperature sensor built in.

• If a temperature electrode is used, ATC (Auto Temperature Compensation) and the sampletemperature are displayed.
• If the meter does not detect a temperature electrode, it automatically switches to the ManualTemperature Compensation mode and MTC appears. MTC temperature should be set (3.1).

Note: STARTER 2200 accepts NTC 30 kΩ temperature sensor.

Using the memory

Storing a reading
The STARTER 2200 can store up to 99 endpoint results.

• Press button when the measurement reaches endpoint. M01 indicates that one result has been stored.

If you press when M99 is displayed, FUL displays to indicate the memory is full. To store further data you will have to clear the memory. (See 4.4.3)

Recalling from memory

• Press and hold to recall the stored values from memory when the current measurement reaches endpoint.
• Press button to scroll through the stored results. R01 to R99 indicates which result is being displayed.
• Press to exit.

Clearing the memory

• Pressing to scroll through the stored results until “MRCL” appears.
• Press , CLr blinks; There are now 2 options:
• Press to confirm the deletion of all the stored data.
• Press to return to the measurement mode without deleting the memory.

MAINTENANCE

Error message

sure that you finish pressing all five keys within two minutes.
Error 2| Measured values out of range| Check if the electrode is properly connected and placed in the sample solution.
Error 3| Measured buffer temperature out of range (<5 or >40 °C)| Keep the pH buffer temperature within the range for calibration
Error 4| Offset out of range

offset > 60mV or < – 60 mV

| Make sure the pH buffer is correct and fresh; Clean or replace the pH electrode.
Error 5| Slope out of range| Make sure the buffer is correct and fresh; Clean or replace the pH electrode.
Error 6| Meter cannot recognize the buffer| Make sure the buffer is correct and fresh; check if the buffer has not been used more than once.
Error 9| The current data set has already been stored once| An endpoint reading can only be stored once. Perform a new measurement to store.
Error 10| The sample temperature out of range| Check the sample temperature, the temperature sensor.

If an error happens, the meter will also beep 3 times to alert. For further technical support, please contact Ohaus. (US please contact 1-800-672-7722).

Meter maintenance

Attention: Never unscrew the two halves of the housing! For routine meter maintenance, dust and wipe with a damp cloth. If necessary, warm water or mild water-based detergent can be used. Meter maintenance can be performed on a daily, weekly or monthly basis, as required by the operating environment. To clean, use a damp cloth. The housing is made of acrylonitrile butadiene styrene (ABS). This material is susceptible to damage by some organic solvents, such as toluene, xylene and methyl ethyl ketone (MEK). Any spillage should be immediately wiped off.

Electrode maintenance

Attention: Make sure the electrode is filled with electrolyte solution. Always store the electrode according to the electrode instruction manuals and do not allow it to dry out. If the electrode response becomes sluggish or the slope is not good enough, try:

• Soak the electrode in 0.1M HCl for more than 8 hours.
• For fat or oil contaminant, degrease the membrane with cotton wool soaked in either acetone or a soap solution.

After electrode treatment, a new calibration should be performed. If the electrode slope is still not good, the electrode might need to be replaced.

Self-diagnosis

• Press and hold button- and button- simultaneously until the meter display the full screen. Each icon blinks one after the other.

This way you may check whether all icons are correctly shown. The next step is to check that the keys are functioning correctly. This requires user interaction. When b blinks, five icons are displayed.

• Press the five keys in any order. Each time you press a key an icon disappears from the screen, continue to press the other keys until all the icons have disappeared. When the self-diagnosis has been completed successfully, appears, means “pass”. If self-diagnosis fails, error message Err appears.

Note: You have to finish pressing all five keys within 2 minutes, otherwise Err appears and you will have to repeat the procedure.

Recover factory settings

• When the meter is off, press and hold button- & button- & button- together for 3 seconds, the screen displays and blinks, means “Reset”. Then we have 2 choice:
• Press button- to reset factory settings (MTC, slope and offset, etc.), display then restart the meter.
• Or press button- to quit the setting, display then turn off the meter.

TECHNICAL DATA

Specifications

–1999…1999 mV 0 °C…100 °C

Resolution| 0.01 pH 1 mV

0.1 °C

Error limits| ± 0.01 pH

± 1 mV

± 0.5 °C

Calibration| 1 or 2 points

1 predefined buffer group (1.68, 4.01, 7.00, 10.01)

Memory| Recall last calibration data, 99 sets of measurement data
Power supply| AC Adapter Input: 100-240V ~ X.XA 50/60 Hz AC Adapter Output: 12V Ì X.XA
Size/weight| 220 W x 175 D x 78 H mm / 0.75 kg
Display| Liquid crystal
Input| BNC, impedance > 10e+12 Ω Cinch, NTC 30 kΩ
Temperature-compensation| ATC & MTC
Housing| ABS

Ambient conditions

• Indoor use only
• Altitude: Up to 2000 m
• Humidity: maximum relative humidity 80 % for temperatures up to 30°C decreasing linearly to 50% relative humidity at 40°C
• Mains supply volt age fluctuations: up to ±10% of the nominal voltage
• Installation category II
• Pollution degree: 2
• Operability is assured at ambient temperatures between 5°C to 40°C

COMPLIANCE

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

Directives 2011/65/EU (RoHS), 2014/30/EU (EMC), 2014/35/EU (LVD). The EU

Declaration of Conformity is available online at www.ohaus.com/ce.

 |

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.

 |

EN 61326-1

ISED Canada Compliance Statement:
CAN ICES ICES-003(A) / NMB NMB-003(A)

ISO 9001 Registration
The managem managemen t system governing the production of this product is ISO 9001 certified.

FCC Supplier Declaration of Conformity

Unintentional Radiator per 47CFR Part B Trade Name: OHAUS CORPORATION Model or Family identification: STARTER 2200

Issuing Party that Assembled the Product:
Ohaus Instruments (Changzhou) Co., Ltd. 2F, 22 Block, 538 West Hehai Road, Xinbei District, Changzhou Jiangsu 213022 China Phone: +86 519 85287270

Responsible Party – U.S. Contact Information:
Ohaus Corporation 7 Campus Drive, Suite 310 Parsippany, NJ 07054 United States Phone: +1 973 377 9000

• Web: www.ohaus.com

FCC Compliance Statement:

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. Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.

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® istheregistered trademarkof OHAUS Corporation in the United States and/or othercountries.  OHAUS Corporation7 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 partoutdans le monde

• www.ohaus.com

PN 30655947 B©2021 OHAUS Corporation, all rights reserved / todos los derechosreservados.

References

• Lab Balance | Industrial Scales | Lab Equipment | Lab Instruments | OHAUS
• Lab Balance | Industrial Scales | Lab Equipment | Lab Instruments | OHAUS
• CE Declarations | OHAUS

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