HHP680 Manometer
Figure 1. Open Battery Cover
5. Install 4 pcs of new AAA 1.5V batteries (MN-2400), Alkaline type is
recommended.
6. Slide battery cover back to its position and fasten the screw. Cleaning
Periodically wipe the case with a damp cloth and detergent, do not use
abrasives or solvents.
Operation Manual of Mamometer
1. On/Off and Unit Selection (Refer to figure 2):
This is a 3 position switch. Setting the switch at lower position turns off the
meter. Slide the switch to middle or upper position to turn on the meter
and select the unit as 0.1" or 0.01" of water column respectively.
2. Hold the measured value (Refer position 2 in figure 2 for the “H” button):
Press the “H” button to hold the figure shown in the display at that
moment. An indication “H” shown at the top of the display. To release the
holding press the button again.
3. Max value of a changing pressure (Refer position 3 in figure 2 for the
“MAX” button): Press the “MAX” button, “MAX” indication shown at the
top of the display. The meter hold the maximum value measured. To
release the holding press the button again.
4. Zeroing (Refer position 4 in figure 2 for the “ZERO” button):
There are 2 purposes to “Zero” the meter.
4.1 When measuring a high pressure (close or over the range of the
meter), the meter might not be able to return to Zero after the
pressure removed. Press the “ZERO” button to bring the meter
back to zero .
4.2 To set a reference pressure as zero to measure a pressure relative
to the reference.
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