Offering 11 selectable units of measure, the HD700 Differential Pressure Manometer can serve as a low range/high resolution Gauge or provide Differential Pressure up to 0 to 55.40 in. H2O (inches of water). Max/Min recording and Relative time stamp are useful features, as are HD700’s Data Hold and Auto Power Off functions. The 2psi HD700 also features Zero function for offset correction or measurement and a built-in USB interface. Comes complete with 9V battery, software with USB cable, AC Adaptor, connection hose, built-in stand, and hard carrying case.
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Congratulations on your purchase of the Extech Manometer Model HD700. This device measures gauge and differential pressure in the range of ±2.000 psi. The HD700 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 (https://paykars.com/) to check for the latest version of this User Guide, Product Updates, and Customer Support.
The HD700 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). To defeat this feature, press and hold the HOLD button while turning the meter on.
Release the HOLD button when ‘n’ appears on the display. The meter will now remain on until the user turns it off or until the battery weakens. Note that the Auto Power OFF feature will be
reactivated the next time the meter is turned off and then on.
Press the UNIT button to select the unit of measure. This meter offers eleven (11) units of measure as listed below.
Connect tubing to the P1, P2 (or both) input port(s). If both inputs are used (differential mode), the meter displays a positive pressure reading if the P1 pressure is greater than P2 and a negative reading if P2 is greater than P1.
The unit must be kept in the upright position when ZEROING or when taking measurements. To ZERO the meter: Before use and without fittings attached to the meter, press and hold the HOLD button for 3 seconds or until the display shows all zeroes. To OFFSET meter readings: Press the DIF button while taking a measurement. Subsequent readings will represent the difference between the current measurement and the measurement that was on the display when the DIF button was pressed.
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. Press the RECORD button again to view the highest (MAX) reading recorded since the RECORD button was first pressed. The MAX indicator and maximum reading will appear on the display. The elapsed timer will show the time of the MAX event.
3. Press the RECORD button again, the MIN indicator and the minimum value will appear on the display. The elapsed timer will show the time of the MIN event.
4. Press the RECORD button again, the AVG indicator and the average value will appear on the display. The elapsed timer will continue to run.
5. To return to normal operation, press and hold the RECORD button until the display indicators REC, MAX, etc. switch off.
Note that in the RECORD mode, the backlight and the power buttons are the only available functions.
This meter has the capability to connect to and communicate with a PC. Check the software download page of the website www.extech.com/software for the latest version of the PC software and its operating system compatibility. Download and unzip the software. Run ExtechInstaller.exe and then refer to the instructions provided in the HELP Utility within the software program.
The following codes are displayed when the meter encounters an error.
ERR 1: Pressure input exceeds specified limits
ERR 2: Pressure input is too low to read
ERR 3: The Differential Pressure input exceeds specified limits
ERR 4: The Differential Pressure input is too low to read
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.
• Please dispose of batteries responsibly; always observe local, state, and federal regulations with regard to battery disposal.
• Never dispose of batteries in a fire. Batteries may explode or leak.
• Never mix battery types. Always install new batteries of the same type.
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