Meter Description - Extech Instruments HD750 User Manual

Meter Description

1. P2 input
2. AC adaptor jack
3. P1 Input
4. LCD Display – Indicates the measurement data, unit of
measure, elapsed timer, and function symbols as
described in this manual
5. USB PC interface jack (3.5mm) – For use with data
acquisition software
6. UNIT button – Press to select the unit of measure
7. DIF button– Press to display differential pressure. Also
used to OFFSET the displayed readings.
8. RECORD button– Press to access the MIN/MAX/AVG
recording mode
9. HOLD / ZERO button– Press to freeze the displayed
reading. Also used to zero the display (press and hold
until display shows all zeroes).
10. BACKLIGHT button – Press to switch the display
backlight ON. The backlight will automatically turn OFF after 40 seconds.
11. POWER button – Press to turn the meter ON or OFF
12. Battery compartment (on rear)
Display
1. USB data output active
2. Differential Pressure Mode
3. Data Hold Mode
4. Primary display
5. Record Mode
6. MAX/MIN/AVG indicators
7. Low Battery Indicator
8. Pressure unit of measure
9. Elapsed Timer
3 HD750 V1.2 3/08