USER GUIDE Heavy Duty Differential Pressure Manometer
Contents
1. i Warning Pressure inputs of 10 psi or higher will damage the instrument Do not apply pressure higher than the maximum pressure listed in the specification table 7 HD750 en GB_V1 8 4 15 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 Never dispose of used batteries or rechargeable batteries in household waste As consumers users are legally required to take used batteries to appropriate collection sites the retail store where the batteries were purchased or wherever batteries are sold Disposal Do not dispose of this instrument in household waste The user is obligated to take end of life devices to a designated collection point for the disposal of electrical and electronic eguipment Other Battery Safety Reminders o Never dispose of batteries in a fire Batteries may explode or leak o Never mix battery types Always install new batteries of the same type Conversions Useful conversion Factors From To Multiplier in of H O in of Hg 0 07355 in of H2O cm of H2O 2 54 mm of Hg in of H20 0 03937 Copyright 2013 2015 FLIR Systems Inc2. All rights reserved including the right of reproduction in whole or in part in any form 1SO 9001 Certified www extech com 8 HD750 en GB_V1 8 4 15
3. EXTECH USER GUIDE INSTRUMENTS 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 This meter is shipped fully tested and calibrated and with proper use will provide years of reliable service Please visit our website www extech com to check for the latest version of this User Guide Product Updates and Customer Support Meter Description 1 Plinput 2 AC adaptor jack 3 P2Input 4 LCD Display Indicates the measurement data unit of measure 10 11 12 elapsed timer and function symbols as described in this manual USB PC interface jack 3 5mm For use with data acquisition software UNIT button Press to select the unit of measure DIF button Press to display differential pressure Also used to OFFSET the displayed readings RECORD button Press to access the MIN MAX AVG recording mode HOLD ZERO button Press to freeze the displayed reading Also used to zero the display press and hold until display shows all zeroes BACKLIGHT W but
4. H 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 Toreturn 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 USB PC Interface The meter has a built in USB port for use with the Manometer Data Acquisition software The software allows the user to view save export and print readings from the HD750 Refer to the documentation included with the software for complete details Displayed Error Codes 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 5 HD750 en GB_V1 8 4 15 Specifications General Specifications Display Uni
5. ton Press to switch the display backlight ON The backlight will automatically turn OFF after 40 seconds POWER button Press to turn the meter ON or OFF Battery compartment on rear HD750 en GB_V1 8 4 15 Display 1 tO 100 N pi a USB data output active Differential Pressure Mode Data Hold Mode Primary display Record Mode MAX MIN AVG indicators Low Battery Indicator Pressure unit of measure Elapsed Timer Ou HD750 en GB_V1 8 4 15 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 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 Unit of Measure Press the UNIT button to select the unit of measure This meter offers eleven 11 units of measure as listed below Unit of Measure Display icon Pounds per sq
6. ts 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 BAR mBAR psi kg cm mm Hg inches Hg kPa feet H2O inches H O cm H O and oz in 0 3 FS 25 C 0 2 to 0 5 FS 0 3 FS 1 1 FS 10psi 0 5s typical Differential inputs P1 and P2 Two metal 4 8mm barbed for 1 8 3 17mm ID tubing Freezes displayed reading Built in piezoelectric sensors Pushbutton activation 0 5 sec approx Air or non corrosive and non ionized gas not intended for use with liquids Meter turns off after approx 20 minutes to conserve energy can be deactivated Built in USB serial interface 0 to 60 C 14 to 140 F lt 80 RH 0 to 50 C 32 to 122 F lt 80 RH 9V alkaline battery BAT low battery indicator 125 hours typical 210 x 75 x 50mm 8 2 x 2 9 x 1 9 280g 9 802 6 HD750 en GB_V1 8 4 15 Range Specifications Range Units Max Resolution 0 344bar 0 001 344 7mbar 0 1 5 000psi 0 001 0 351Kg cm 0 001 258 5 mm Hg 0 1 10 18 inches Hg 0 01 34 47kPa 0 01 11 53feet H20 0 01 138 3inches HO 0 1 351 5cm H20 0 1 80 000z in 0 01
7. uare inch psi Inches of Mercury inHg Milli bar mbar Millimeters of Mercury mmHg Kilo Pascals kPa Kilograms per centimeter squared Kgcm Inches of water inH O0 Feet of water ftH O0 Centimeters of water cmH 0 Bars Bar Ounces per square inch ozin Fittings Connection 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 4 HD750 en GB V1 8 4 15 Zero Adjust and Offset function 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 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 H
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