User`s Manual for 8890A4 Digital Manometer
Contents
1. To save readings a computer must be attached and the software loaded onto the computer Error Codes An error message will appear on the display if the meter fails an internal diagnostic test With a failure the meter will freeze all the buttons Err 1 Pressure value is over the range Err 2 Pressure value is below the range Err 3 DIF function the differential pressure value is over range ee a Err4 DIF function the differential pressure value is below range Battery Replacement When the battery power does not provide enough power for correct measurements BAT will appear on the LCD display Replace the 9V battery by removing the back cover 8890 1 10 FD12. User s Manual for 8890A4 Digital Manometer CE Distributed by www FiredragonEnt com Overview The 8890A4 is a device that measures Gauge Differential Pressure from 55 41nH20 to 55 4 inH20 2 psi it features 11 selectable units of measure inH20 psi bar mbar kPa inHg mmHg ozin ftH20 cmH20 cmH20 kgcm Additional features include Data Hold Auto Power Off Disabled and a USB Port for capturing reading to a PC using the supplied software Careful use of the 8890A4 meter will provide years of reliable service Specifications Display Dual LCD Accuracy 0 3 FSO 25 C Repeatability 0 2 Max 0 5 FSO Linearity Hysteresis 0 29 FSO Pressure Range 2 psi Maximum Pressure 10psi Response Time 0 5 Seconds typical Low Battery Indicator Yes Over range Indicator Err 1 Under range Indicator Err 2 Operating Conditions 0 to 50 C Storage Conditions 10 to 60 C Power Supply 1 each 9V Battery or external 9Vdc Power Supply CP2102 USB to UART Bridge Controller Serial format Baud rate 9600 Baud 8 Data Bits Measurement Scales 8890A4 55 40 32 00 2 000 0 001 4 612 0 001 kpa pmm hg 103 4 ON Function Buttons The 8890A4 has six buttons See Figure 1 1 UNITS 2 DIF 3 REC 4 HOLD 5 BACKLIGHT 6 ON OFF Display Description The meter will display the following See Figure 2 1 Hold Function Coral 2 Differential Mode SY 3 Primary Da
3. ta Screen AnH 4 Record Mode 4 MZA 3 5 MAX MIN AVG gor a l UA yw 6 Low Battery Indicator EE 5 ws SS 7 ESUE ues indicator A 6 8 Relative Time Clock Q _ BLY 7 9 Data Output from USB A 7 A Operation 1 Power Press the ON OFF button to turn the 8890A4 meter power on or off The meter will perform a IF DATALOGGER short self test when turned on The meter defaults to the setting used during the last operation 2 Zero Adjust and Offset Before using and without hoses or fittings attached to the meter press the HOLD button for more than 2 seconds to zero the meter The meter will reset and display 0000 from right to left and 0 000 will be displayed If it is desired to offset the meter and display 8 press the DIF button while taking a measurement kPa kgem inH O ftH O cmH O Subsequent reading will be the difference between the current measurement and the measurement that was on the display when Figure 2 the DIF button was pressed 3 Data Hold Press the HOLD button momentarily to freeze the displayed reading The HOLD icon will appear on the upper left hand side of the display If the pressure value is over the range error codes will show on the screen Press the HOLD button again to return to normal operation 4 Record The MAX MIN mode allows the user to view only the highest MAX lowest MIN or average AVG readings with relative time stamp 1 Press the REC bu
4. tton once and REC appears on the display All other functions are locked out except for Power amp Backlight The relative time clock also appears in the secondary display and starts counting 2 Press the REC Button again and MAX appears on the display The display is now showing the maximum pressure and relative time that it was recorded 3 Press the REC button to display the minimum MIN reading with the relative time 4 Press the REC button to display the average value AVG reading with the relative time 5 Press the REC button again to continue recording Max MIN AVG measurements 6 To exit the MIN MAX AVG mode press the REC button for 3 seconds to return to normal operation 5 Backlight Display Press the Backlight button to turn on the backlight It will remain on for 40 seconds 6 Automatic Power Off The 8890A4 will automatically shut off after 20 minutes to conserve battery life To disable Auto Power Off hold down the HOLD button and turn on the meter An n will appear in the display indicating that Auto Power Off mode is disabled The meter will return to normal operation when it is turned off 7 Units of Measure Press the Unit button momentarily and the meter will cycle through the 11 available units of measure as indicated by the cursor on the bottom of the display USB The 8890A4 has a USB port for use with the PC interface Data Acquisition Software Hardware kit The meter will show all readings in real time
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