406850 Datasheet, PDF (4/6 Pages) Extech Instruments Corporation. – Differential Pressure Manometer

Operation
Power
Press the ON/OFF button to turn power on or off. The meter will perform a short self-test
when turned on. The meter defaults to the setting used during the last operation.
Zero Adjust and Offset
Before use and without fittings attached to the meter, press the HOLD button for more than 2
seconds to zero the meter. The meter will reset and display “o o o o” from right to left. “0.0”
will now be displayed.
If it is desired to offset the meter’s display, press the DIF button while taking a measurement.
Subsequent readings will be the difference between the current measurement and the
measurement that was on the display when the DIF button was pressed.
Data Hold
Press the HOLD button momentarily to freeze the displayed reading. The 'HOLD' icon will
appear on the upper left-hand side of the display. Press the HOLD button again to return to
normal operation.
Record
The MAX/MIN mode allows the user to view only the highest (MAX) or lowest (MIN) readings
with relative time stamp.
1. Press the REC button once and “REC” appears on the display (All other functions
are locked out except for Power & Backlight). The relative time clock also appears
in the secondary display and starts counting.
2. Press the REC button again and “MAX” appears on the display. The display is now
showing the maximum pressure and relative time that it was recorded.
3. Press the REC button again to display the minimum “MIN” reading with the relative
time.
4. Press the REC button again to continue recording min/max measurements.
5. To exit the MIN/MAX mode, press the REC button for 3 seconds to return to normal
operation.
Backlight Display
Press the key to turn on the backlight. It will remain on for 30 seconds.
Automatic Power Off
The meter will automatically shut off after 20 minutes to conserve battery life. To disable Auto
Power Off, hold down the HOLD button and turn the meter on. An “n” will appear in the
display indicating that Auto Power Off mode is disabled. The meter will return to normal
operation when it is turned off.
Unit
Press the Unit button momentarily and the meter will cycle through the 5 available units of
measure as indicated by the cursor on the bottom of the display.
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406850 V2.0 6/06