User Guide Heavy Duty Differential Pressure Manometer Model HD750
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.
Basic Operation Meter Power The HD750 uses a 9V battery for power. If the meter does not switch on when the POWER button is pressed or if the display shows BAT, replace the battery. When the POWER buttons is pressed, the meter performs a short self-test and reverts to the settings in place when the meter was last turned off. Automatic Power-off Feature In order to conserve battery life, the meter has an automatic power off feature (after 20 minutes).
MIN-MAX-AVG Record Mode with Elapsed Timer The RECORD function tracks the maximum (MAX), minimum (MIN), and average (AVG) readings with a time stamp. The elapsed timer is displayed on the lower right-hand corner of the LCD and informs the user of the time a MAX or MIN reading was recorded. 1. Press the RECORD button once. The REC indicator will appear on the display and the displayed elapsed timer will start (HH:MM:SS format [hours:minutes:seconds]). 2.
Specifications General Specifications Display Units of Measure Accuracy Repeatability Linearity/Hysteresis Combined Accuracy Maximum Pressure Response time Input circuit Input Ports Data Hold Sensor Zero / Offset function Sample rate Compatibility Auto Power OFF PC Interface Storage conditions Operating conditions Battery power Battery life Dimensions Weight Four digit LCD with function indicators 2 BAR, mBAR, psi, kg/cm , mm Hg, inches Hg, kPa, feet H2O, 2 inches H2O, cm H2O, and oz in ±0.
Battery Replacement When the low battery indicator BAT appears on the display or if the meter does not switch on when the POWER button is pressed, it is necessary to replace the battery. To replace the battery: 1. Open the battery compartment by sliding the meter’s rear panel in the direction of the embossed arrow. 2. Replace the 9V alkaline battery 3. Replace the battery compartment cover.
