HD750-en-GB_V1.8 4/15
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Introduction
Congratulations on your purchase of the Extech Manometer Model HD750. This device measures
gauge and differential pressure in the range of ±5.000 psi. The HD750 offers eleven (11) units of
measure (user selectable by front panel pushbutton) and has a differential input that uses
convenient quick disconnect fittings. Advanced features include DATA HOLD, MIN MAX AVG
RECORD mode, ZERO/OFFSET, AUTO POWER OFF, and USB PC interface. This meter is shipped fully
tested and calibrated and, with proper use, will provide years of reliable service. Please visit our
website () to check for the latest version of this User Guide, Product Updates, and
Customer Support.
Meter Description
1. P1 input
2. AC adaptor jack
3. P2Input
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
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