1. pressure input (+)
2. differential pressure (-)
3. LCD-display
4. Press the “UNITS-button” to change the measurement unit.
5. Press the „
☼
-button” to turn on the backlight. Press it again to turn off the backlight.
6. Press the “DIF-button” during a measurement to start a differential pressure
measurement between the following measurement value and the value while pressing
the “DIF-key”.
7. Press the “REC-button” to step through the maximum, minimum, and average readings.
To exit the MAX/MIN/AVG mode, press the “REC-button” for 2 seconds to return to
normal operation.
8. battery cover
9. Press the “ON/OFF-button” to turn the thermometer on or off.
10. Press the “HOLD-button” to freeze or unfreeze the displayed readings. Press the “HOLD-
button” and hold 2 seconds to zero out the display.
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