407495 Datasheet, PDF (3/6 Pages) Extech Instruments Corporation. – Heavy Duty Pressure Meter

Preparation for Use
Measurement Procedure Overview
The following list provides an overview of pressure measurement steps. Each step is
discussed in subsequent paragraphs. Note that the first 4 steps should only be performed
the first time the meter is used and each time the transducer is changed.
1. Select a Transducer model that covers the desired range
2. Plug the Transducer into the meter's input jack
3. Program the Transducer range
4. Select the measurement units
5. Zero the meter
6. Connect the Transducer to the process under test
7. Apply pressure to the process under test
8. Read pressure reading on the meter's LCD
Selecting Transducer Range
1. With the meter turned OFF, simultaneously press and hold the HOLD, SENSOR, &
RECORD buttons down.
2. While holding the three buttons down, press the POWER key momentarily. Release
the 3 buttons when the LCD display switches on.
3. A number will appear on the LCD that represents the Transducer type. Select the
Transducer type by pressing the SENSOR TYPE key until the desired transducer
number appears. Select the transducer from the list below in step 5.
4. Press the ZERO button to store the new transducer type. The meter will memorize the
new type even when the meter is turned OFF.
5. Select the transducer from the following list:
• Select 2 for the 30 psi (2 bars) transducer
• Select 10 for the 150 psi (10 bars) transducer
• Select 20 for the 300 psi (20 bars) transducer
NOTE: The meter does not need to be recalibrated each time the transducer is changed.
Connecting the Transducer to the Meter
1. Press the POWER button to turn the meter OFF.
2. Remove the existing transducer, if necessary, by unplugging it from the meter’s input
jack (top of meter).
3. Plug the new transducer into the meter’s input jack.
Selecting the Unit of Measure
Press the UNIT key to select the desired unit of measure: Bar, psi, Kg/cm², mmHg, inHg,
mH₂O, inch H₂O, or Atmospheres (ATP).
3
407495 V2.1 11/2007