EXTECH SDL720 Heavy Duty Differential Pressure Manometer User Manual

: August 17, 2024
: EXTECH

Table of Contents

EXTECH SDL720 Heavy Duty Differential Pressure Manometer
Product Usage Instructions
Introduction
Meter Description
Getting Started
Setup Mode
Data logging
Specifications
Three-year Warranty
FAQ
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

EXTECH SDL720 Heavy Duty Differential Pressure Manometer

Specifications

Model : SDL720
Type : Heavy Duty Differential Pressure Manometer
Display : LCD Display
Power Source : Batteries or AC adaptor
Connectivity : RS232 output jack
Memory : SD card slot
Additional Features : Backlight, Hold function, Zero adjustment

Product Usage Instructions

Getting Started

Power-O-OFF: Ensure fresh batteries are installed or AC adaptor is connected correctly to switch ON the meter.
Display Backlight: Press and hold the backlight button for at least 1.5 seconds to toggle the backlight ON or OFF.
Units of Measure: Press and hold the UNIT button to change the unit of measure displayed on the LCD. Release the button when the desired unit appears.

Zero Adjustment
To zero the display for a connected sensor, press and hold the up and down arrow keys simultaneously for at least 1.5 seconds. The screen will show CAL 0.

Data Hold
To freeze a reading on the LCD, press the HOLD button momentarily. Press the HOLD button again to exit HOLD mode.

Setup Mode

Basic Settings: Press the SET button momentarily to view the time, date, and data logging sampling rate. Press SET multiple times to cycle through all information.
Accessing Setup Mode:
- Press and hold the SET button for at least 1.5 seconds to access the Setup menu.
- Press the SET button momentarily to step through available parameters like setting clock, datalogger sampling rate, power-off management, beeper sound, numerical format, and formatting SD memory card.

Introduction

Congratulations on your purchase of the Extech SDL720 Pressure Manometer. This device measures gauge and differential pressure in the range of ±29 psi. Supported measurement units are bar, psi, Kg/cm2, mm Hg, inch Hg, meters of H2O, inches of H2O, atmosphere, hPA, and kPA. Logged data readings are stored on an SD card for transfer to a PC. This meter is shipped fully tested and calibrated and, with proper use, will provide years of reliable service. Please visit our website (www.extech.com) to check for the latest version of this User Manual, other Translations of this manual, and Customer Support.

Safety
International Safety Symbols: This symbol, adjacent to another symbol or terminal, indicates the user must refer to the manual for further information.

Meter Description

P1 Input (positive +)
P2 Input (negative -)
LCD Display
HOLD and Backlight key
MAX-MIN key
SET and Clock key
RS232 output jack
Reset button
Power Adaptor jack
SD card slot
ENTER and LOG key
Down arrow ▼ key (Press ▼&▲ key at same time to zero meter)
Up arrow ▲ / UNIT key (Press ▼&▲ key at same time to zero meter)
Power ON-OFF key

Notes : Items 7, 8, and 9 are located behind the snap-off compartment cover on meter’s right side. Battery compartment, tilt stand, and tripod mount are located on the rear of the instrument.c

Getting Started

Power the meter by pressing and holding the power button for at least 1.5 seconds.
Press and hold the power button for at least 1.5 seconds to power of the meter.
This meter is powered by six (6) 1.5VDC ‘AA’ batteries or by an optional AC adaptor. If the meter will not switch ON please check that fresh batteries are installed in the rear battery compartment or, in the case of the AC adaptor, check that the adaptor is connected correctly to the meter and to an AC source.

Display Backlight
To turn the display backlight ON or OFF, press and hold the backlight button for at least 1.5 seconds. The meter will beep when switching the backlight ON or OFF unless the beeper is disabled.

Units of Measure
The currently selected unit of measure is shown below the measurement value on the meter’s LCD. To change the unit of measure, press and hold the UNIT button until the desired unit of measure appears and then release the UNIT button. The meter begins scrolling through the available units of measure (see table below) after the UNIT button has been depressed for at least 1.5 seconds.

UNIT	DISPLAY INDICATOR
psi	PSI
Inch Hg	In Hg
Inch H2O	In H2O
hPA	hPA
kPA	_PA
Bar	bAr
Kg/cm2	_g C2
mm Hg	–Hg
Meters H2O	-t H2O
Atmospheres	AtP

ZERO Adjustment
To null, or zero, the display for a connected sensor, press and hold the up▲ and down ▼arrow keys for at least 1.5 seconds. The meter will show CAL 0 on the bottom left of the screen.

Data Hold
To freeze a displayed reading on the LCD, momentarily press the HOLD button (the HOLD icon will appear above the reading). To exit HOLD, press the HOLD button again.

Setup Mode

Basic settings at a glance
To view the current configuration of the meter with regard to time, date, and data logging sampling rate press the SET button momentarily. The meter will now display the configuration in quick succession. If the information is missed on the first try, simply press the SET button again until all of the information is noted.

Accessing the Setup mode

Press and hold the SET button for at least 1.5 seconds to access the Setup menu.
Press the SET button momentarily to step through the available parameters. The parameter type is shown on the bottom of the LCD and the current selection for that type is shown above it.
When a parameter is displayed that is to be changed, use the arrow keys to change the setting. Press the ENTER button to confirm a change.
Press and hold the SET button for at least 1.5 seconds to exit the Setup mode. Note that the meter automatically switches out of the Setup mode if no key is pressed within 7 seconds.
The available Setup parameters are listed below. Additional detailed information is provided below this list:
- dAtE Set the clock (Year/Month/Date; Hours/Minutes/Seconds)
- SP-t Set the datalogger sampling rate (Hours/Minutes/Seconds)
- PoFF Automatic power-off management (Enable or disable the auto-power-off function)
- bEEP Set the beeper sound ON/OFF
- dEC Set the numerical format; USA (decimal: 20.00) or European (comma: 20,00)
- Sd F Format the SD memory card

Setting the Clock Time

Access the dAtE parameter.
Use the arrow keys to change a value
Use the ENTER button to step through the selections
Press and hold the SET button for at least 1.5 seconds to exit to the normal operation mode (or simply wait 7 seconds for the meter to automatically switch to the normal operating mode).
The clock will keep an accurate time even when the meter is switched off. However, if the battery expires the clock will have to be reset after fresh batteries are installed.

Setting the Datalogger Sampling Time (Rate)

Access the SP-t parameter.
The sampling rate can be set from ‘0’ seconds (manual log mode) up to 8 hours, 59 minutes, and 59 seconds. (Data lose may occur when logging at a 1 second rate)
Use the ENTER button to move through the Hours, Minutes, and Seconds digit groups and use the arrow keys to change the digit values.
Press the ENTER button to confirm the entry.
Press and hold the SET button for at least 1.5 seconds to exit to the normal operation mode (or simply wait 7 seconds for the meter to automatically switch to the normal operating mode).

Enabling/Disabling the Auto Power OFF Feature

Access the PoFF parameter.
Use the arrow buttons to select ON or OFF. With the Auto Power OFF feature enabled, the meter will automatically switch OFF after 10 minutes of inactivity.
Press ENTER to confirm setting.
Press and hold the SET button for at least 1.5 seconds to exit to the normal operation mode (or simply wait 7 seconds for the meter to automatically switch to the normal operating mode).

Set the Beeper Sound ON or OFF

Access the bEEP parameter.
Use the arrow buttons to select ON or OFF.
Press ENTER to confirm the setting.
Press and hold the SET button for at least 1.5 seconds to exit to the normal operation mode (or simply wait 7 seconds for the meter to automatically switch to the normal operating mode).

Numerical Format (comma or decimal)
European and USA numerical formats differ. The meter defaults to USA mode where a decimal point is used to separate units from tenths, i.e. 20.00; The European format uses a comma, i.e. 20,00 to separate units from tenths. To change this setting:

Access the dEC parameter.
Use the arrow buttons to select USA or Euro.
Press ENTER to confirm setting.
Press and hold the SET button for at least 1.5 seconds to exit to the normal operation mode (or simply wait 7 seconds for the meter to automatically switch to the normal operating mode).

SD Card FORMATTING

Access the Sd F parameter.
Use the arrow buttons to select YES to format the card (select NO to abort). Note that all data on the card will be lost if formatting is attempted.
Press ENTER to confirm selection.
Press ENTER again to re-confirm.
The meter will automatically return to the normal operating mode when formatting is complete. If not, press and hold the SET button for at least 1.5 seconds to exit to the normal operation mode.

System Reset
If the meter’s keys become inoperable or if the display freezes the Reset button can be used to reset the instrument.

Use a paper clip or similar item to momentarily press the reset button located on the lower right side of the instrument under the snap-off compartment cover.
After pressing the Reset button, switch the instrument ON by pressing and holding the POWER key for at least 1.5 seconds. If using the power adaptor unplug the adaptor and then plug it back in again to power the meter.

Max-Min Reading Record
For a given measurement session, this meter can record the highest (MAX) and the lowest (MIN) readings for later recall.

Press the MAX-MIN button momentarily to access this mode of operation (REC icon appears).
The meter is now recording the MAX and MIN readings.
Press the MAX-MIN button again to view the current MAX readings (MAX icon appears). The readings on the display are now the highest readings encountered since the REC icon was switched on (when the MAX-MIN button was first pressed).
Press the MAX-MIN button again to view the current MIN readings (MIN icon appears). The readings on the display are now the lowest readings encountered since the REC icon was switched on (when the MAX-MIN button was first pressed).
To exit the MAX-MIN mode, press and hold the MAX-MIN button for at least 1.5 seconds. The meter will beep, the REC-MAX-MIN icons will switch off, the MAX-MIN memory will clear, and the meter will return to the normal operating mode.

Fittings Connection
Connect tubing to the P1 (+), P2 (-), or both input port(s). If both inputs are used (differential mode), the meter displays a positive pressure reading if the P1 (+) pressure is greater than P2 (-) and a negative reading if P2 (-) is greater than P1 (+).

Data logging

Types of Data Recording

Manual Datalogging: Manually log up to 99 readings onto an SD card via push-button press.
Automatic Datalogging: Automatically log data onto an SD memory card where the number of data points is virtually limited only by the card size. Readings are logged at a rate specified by the user.

SD Card Information

Insert an SD card (from 1G size up to 16G) into the SD card slot at the bottom of the meter. The card must be inserted with the front of the card (label side) facing toward the rear of the meter.
If the SD card is being used for the first time it is recommended that the card be formatted and the logger’s clock set to allow for accurate date/time stamping during datalogging sessions. Refer to the Setup Mode section for SD card formatting and time/date setting instructions.
European and USA numerical formats differ. The data on the SD card can be formatted for either format. The meter defaults to USA mode where a decimal point is used to separate units from tenths, i.e. 20.00. The European format uses a comma, i.e. 20,00. To change this setting, refer to the Setup Mode section.

Manual Datalogging
In the manual mode the user presses the LOG button to manually log a reading onto the SD card.

Set the sampling rate to ‘0’ seconds as described in the Setup Mode section.
Press and hold the LOG button for at least 1.5 seconds and the DATALOGGER icon will appear on the LCD; the lower portion of the display will show p-n (n = memory position number 1-99). Note that if PSI is set as the unit of measure it appears as P51 (where a ‘5’ is used as an ‘S’) in the same area of the LCD where memory locations are shown. This can be disorienting at first.
Momentarily press the LOG button to store a reading. The DATALOGGER icon will flash and the beeper will sound (if set to ON) each time a data point is stored.
Use the ▲ and ▼ buttons to select one of the 99 data memory positions in which to record.
To exit the manual datalogging mode, press and hold the LOG button for at least 1.5 seconds. The DATALOGGER icon will switch off.

Automatic Datalogging
In automatic datalogging mode the meter takes and stores a reading at a user- specified sampling rate onto an SD memory card. The meter defaults to a sampling rate of two seconds. To change the sampling rate, refer to the Setup Mode section (the sampling rate cannot be ‘0’ for automatic data logging):

Select the sampling rate in the Setup Mode to a value other than zero.
Press and hold the LOG button for at least 1.5 seconds. The meter will flash the DATALOGGER icon at the selected sampling rate indicating that readings are now being automatically recorded to the SD card.
If a card is not inserted or if the card is defective, the meter will display EMPTY and exit the DATALOGGER mode. In this case, switch the meter OFF and try again with a valid SD card.
Pause the datalogger by pressing the LOG button momentarily. The DATALOGGER icon will stop flashing and the sample rate will display for a short time. To resume logging simply press the LOG button again momentarily.
To terminate the datalogging session press and hold the LOG button for at least 1.5 seconds.
When an SD card is used for the first time a folder is created on the card and named PMA01. Up to 99 spreadsheet documents (each with 30,000 readings) can be stored in this folder.
When datalogging begins a new spreadsheet document named PMA01001.xls is created on the SD card in the PMA01 folder. The data recorded will be placed in the PMA01001.xls document until 30,000 readings are reached.
If the measurement session exceeds 30,000 readings, a new document will be created (PMA01002.xls) where another 30,000 readings can be stored. This method continues for up to 99 documents, after which another folder is created (PMA02) where another 99 spreadsheet documents can be stored. This process continues in this same fashion with folders PMA03 through PMA10 (last allowable folder).

SD Data Card to PC Data Transfer

Complete a datalogging session as detailed above in the previous sections. Hint: For the first few tests, simply record a small amount of test data. This is to ensure that the datalogging process is well understood before committing to critical, large scale datalogging.
With the meter switched OFF, remove the SD Card.
Plug the SD Card directly into a PC SD card reader. If the PC does not have an SD card slot, use an SD card adaptor (available at most outlets where computer accessories are sold).
Power the PC and run a spreadsheet software program. Open the saved documents in the spreadsheet software program (see example spreadsheet data screen below).

RS-232/USB PC Interface
For streaming of data to a PC via the RS232 Output jack, the optional 407001-USB kit along with the 407001-PRO software (available free at www.extech.com/software/downloads are required.

AC Power Adaptor
This meter is normally powered by six (6) 1.5V ‘AA’ batteries. An optional 9V power adaptor is available. When the adaptor is used, the meter is permanently powered and the power button will be disabled.

Hose Couplings
This meter is supplied with a pair of hose couplings. They fit 4.0mm (0.157”) tubing. See diagram on how to connect these couplings to the hoe and the meter.

Battery Replacement and Disposal
When the low battery icon appears on the LCD, the batteries must be replaced. Several hours of accurate readings are still possible in this condition; however, batteries should be replaced as soon as possible:

Remove the two (2) Phillips screws from the rear of the meter (directly above the top of the tilt stand).
Remove and safely place the battery compartment and screws where they will not be damaged or lost.
Replace the six (6) 1.5V ‘AA’ batteries observing correct polarity.
Replace the battery compartment cover with the two (2) Phillips screws.

Safety: Please dispose of batteries responsibly; never dispose of batteries in a fire, batteries may explode or leak. If the meter is not to be used for 60 days or more, remove the battery and store it separately.

Specifications

General Specifications

Display Backlit LCD; LCD size : 2 x 1.5” (51 x 37mm)
Status indicators Over-range audible beep and low battery display icon
Measurement Units mBar, psi, Kg/cm2, hPA, mm Hg, inch Hg, meters H2O, kPA, inches H2O, ATP
Accuracy (Meter) ± (2%FS) at ambient temperature 73.4oF ±9oF (23°C ± 5°C)
Input circuit Differential inputs (P1 and P2)
Input Ports Two metal 0.197” (5.0mm), barbed for 0.157” (4mm) ID tubing
Hose couplings Replacement pair of hose couplings (407915)
Sensor Built-in piezoelectric sensors
Datalogger Sampling Rate
- AUTO LOGGING: From 1 second up to 8 hours 59 min 59 sec.
- MANUAL LOGGING: Set the sampling rate to ‘0’ seconds. Select 1 to 99 locations. (Data lose may occur when logging at a 1 second rate)
Data error number ≤ 0.1% number of total saved data
Memory Card SD memory card; 1G to 16GB size
Data Hold Freeze the displayed reading
Memory Recall Record and Recall the Maximum and Minimum readings
Display update rate Approx. 1 second
Operating Temperature 32 to 122°F (0 to 50°C)
Operating Humidity 85% R.H. max.
Auto Power OFF After 10 minutes of inactivity (can be disabled)
Power Supply Six (6) 1.5 VDC batteries (optional 9V AC adaptor)
Power Consumption Normal operation (backlight and datalogger OFF): approx. 7mAdc
- With backlight OFF and data logging ON: approx. 32mAdc
- With backlight ON add approx. 5mAdc
Weight 0.44 lbs. (200g)
Dimensions 7.5 x 2.9 x 1.9” (190 x 73 x 47.5mm)

Range/Resolution Specifications

Range/Units (Max.)	Resolution
± 2000 mbar	1
± 29 psi	0.01
± 2.040 Kg/cm2	0.001
± 1500 mm Hg	1
± 59.05 inches Hg	0.02
± 200 kPa	0.1
± 2000 hPA	1
± 802 inches H2O	0.5
± 20.40 m H2O	0.01
± 1.974 ATP	0.001

Conversions

Useful conversion Factors

Three-year Warranty

Teledyne FLIR warrants this Extech brand instrument to be free of defects in parts and workmanship for three years from date of shipment (a six-month limited warranty applies to sensors and cables). To view the full warranty text please visit: https://www.flir.com/support-center/warranty/instruments /extech-product-warranty/.

Calibration and Repair Services
Teledyne FLIR offers calibration and repair services for the Extech brand products we sell. We offer NIST traceable calibration for most of our products. Contact us for information on calibration and repair availability, refer to the contact information below. Annual calibrations should be performed to verify meter performance and accuracy. Product specifications are subject to change without notice. Please visit our website for the most up-to- date product information: www.flir.com/landing/extech/.

Contact Customer Support

Customer Support – Local Telephone List: https://support.flir.com/contact
Obtain a Return Material Authorization (RMA): https://customer.flir.com/Home
Contact Customer Service : https://support.flir.com/ContactService
Technical Support Center: https://support.flir.com

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FAQ

Q: How do I change the unit of measure?
A: Press and hold the UNIT button until the desired unit appears on the display.

Q: How can I freeze a reading on the LCD?
A: Press the HOLD button momentarily to freeze a displayed reading. Press the HOLD button again to exit HOLD mode.

Q: How do I zero the display for a connected sensor?
A: Press and hold the up and down arrow keys simultaneously for at least 1.5 seconds to zero the display. The screen will show CAL 0.