Perfect Prime AR1890 User manual

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www.perfectprime.com for product register and warranty
Customer Service: [email protected]om
Digital Manometer AR1890

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Contents
1. Overview---------------------------------------------------------------------------------------------3
2. Performance Index--------------------------------------------------------------------------------3
3. Buttons Description-------------------------------------------------------------------------------4
4. Display Description--------------------------------------------------------------------------------4
5. Resolution And Range of Units-----------------------------------------------------------------5
6. Operation--------------------------------------------------------------------------------------------6
8. Error Codes------------------------------------------------------------------------------------------7
9. Battery Replacement------------------------------------------------------------------------------7
10. Safety Precaution And Consideration--------------------------------------------------------7

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1. Overview
The meter can measure differential pressure/positive pressure/negative pressure
with very high resolution (more detailed results are shown).There are 11
units can be selected:
1. inH2O 2. psi 3. bar 4. mbar
5. kPa 6. inHg 7. mmHg 8. ozin2
9. ftH2O 10. cmH2O 11. kgcm
With a simple hose connection device equipped，it can be used for:
1. testing ventilation
2. air conditioning system
3. spot check
4. air conditions of a room
5. any gas pressure system troubleshooting.
Easy operation and clear reading are the major features of AR1890. Therefore, it is
doubtlessly an indispensable testing tool for HVAC technician, maintenance
engineers and science researchers.
2. Performance Index
Display
Dual LCD
Accuracy
±0.3%FSO(25°C)
Repeatability
±0.2%FSO(Max+/-0.5%FSO)
Linearity/Hysteresis
±0.29%FSO
Maximum Pressure
10 psi
Response Time
0.5 seconds typical
Low Battery Indicator
Yes
Over Range Indicator
Err.1
Under Range Indicator
Err.2
Operating Conditions
32°F to 122°F (0 to 50°C)
Storage Conditions
14°F to 140°F (-1 to 60°C)
Power Supply
1 X 9V Battery (included) or External
9VDC
Standard Accessories
Pouch &. Tubing

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3. Buttons Description
The meter has six buttons:
1. UNITS
2. DIF
3. HOLD
4. ON/OFF
A. REC
B. BACKLIGHT
4. Display Description
1. Hold Function
2. Differential mode
3. Primary Data Screen
4. Record Mode
5. MAX/MIN/AVG
6. Low Battery Indicator
7. Pressure Unit Indicator
8. Relative Time Clock

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5. Resolution And Range of Units
Function Range Resolution
Function Range Resolution
inH2O ±55.40 0.01
Psi ±2.000 0.001
Mbar ±137.8 0.1
kPa ±13.79 0.01
inHg ±4.072 0.001
mmHg ±103.4 0.1
Ozin2 ±32.00 0.01
ftH2O ±4.612 0.001
cmH2O ±140.6 0.1
Kgcm2 ±0.140 0.001
Bar ±0.137 0.001

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6. Operation
1. ON/OFF button:
-Press the ON / OFF button to turn on/off manometer.
-When turned on, the screen will be displayed for about two seconds and the
normal measurement mode will appear afterwards.
2. Clearance button:
-If there is no input dierential pressure, instrument will not be cleared by itself.
-When manually clearance is needed, press the HOLD button for about five
Seconds,
-->the screen will show ----it will be cleared later.
3. UNITS button:
-Press the UNITS button, units at the bottom of the screen will change.
-These units include:
1. inH2O 2. psi 3. bar 4. mbar
5. kPa 6. inHg 7. mmHg 8. ozin2
9. ftH2O 10. cmH2O 11. kgcm
4. DIF button:
-Press the DIF button, the pressure value will subtract the pressure value before
pressing.
5. HOLD button:
-Press the HOLD button, the current measured result will be kept.
-Press once more will lift the hold function.
6. REC button:
-Press this button intermittently, the maximum, minimum, average result from
process of recording the measuring will be displayed.
-Press the button for about 5 seconds, it will quit recording mode.
-Other function buttons are locked and can not operated.
7. Backlit button:
-Press this button, the backlight will turn on (can use in darkness).
-Press the button again can turn off the backlight.
8. Automatic power-off function:
-It will automatically power off if instrument has not worked for more than 25
minutes.
-If you want to turn off function of automatic power-off:
1. Press HOLD button.
2. Press the ON / OFF button to start.
3. LCD will show "ON"--->the function of automatic power-off turned off.

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7. Error Codes
An error message will appear on screen if the meter fails an internal diagnostic test.
1. Err. 1: Pressure value is over the range.
2. Err. 2: Pressure value is below the range.
8. Battery Replacement
When the battery power is low, “BAT” will display on the screen to remind you for
replacing the 9V battery.
9. Safety Precaution And Consideration
• If product operates abnormally, stop using.
• Please test the manometer before usage to ensure proper operation.
• Always ensure that the connecting hoses are free from kinks, blockage or splits.
• While using the manometer, if you suspect gas is leaking or smell gas:
1. Turn off gas supply and ventilate the affected areas.
2. Identify and iron out the source of leaking before using the product again.
• Do not disassemble or modify the manometer in any way. Otherwise, accident and
injury may occur.