Section 7 - Barometric Pressure to Analog Output Calculations
Output Reference Table
Section 8 - Calibration
Your transmitter has been factory calibrated to meet or exceed the specifications outlined
in this manual. To maintain original specifications it is generally recommended that your
transmitter be re-calibrated on an annual basis depending on operating conditions.
Equipment Required:
1. Regulated Power Supply, 12-24 Vdc @ 30 mA (OMEGA Model:
PSU-93
)
2. Digital DC Volt Meter (OMEGA Model:
HHM29
)
3. Handheld Differential Pressure Calibration Kit, (OMEGA Model:
PCL-200-KIT-D
)
4. Test Leads, Potentiometer adjustment tool
Section 9 - Calibration Procedure
1. Adjust "P1" and "P2" fully counter-clockwise.
2. Connect power to the transmitter as shown in this manual for
Voltage Output
(1-5 Vdc).
3. Allow unit to warm-up for 10 minutes.
4. Connect the PCL-200-Kit D pressure calibrator the pressure port of the sensor.
5. Turn the PCL-200 on to the "PSI" setting.
Adjust the hand pump as such to pull a vacuum down to 12.00 PSI.
6. Adjust "P1" clockwise for an output reading of 1.60 Vdc on the multimeter.
7. Adjust the hand pump as such to create a positive pressure up to 15.72 PSI.
8. Adjust "P2" clockwise for an output reading of 5.00 Vdc on the multimeter.
9. Calibration Complete.
4
in Hg
Psi
mm Hg
Current (mA)
Voltage (Vdc)
32
15.72
813
20
5
31
15.23
788
18.57
4.63
30
14.73
762
17.14
4.27
29
14.24
736
15.71
3.92
28
13.75
711
14.29
3.56
27
13.26
686
12.86
3.21
26
12.77
660
11.43
2.85
25
12.27
634
10
2.49
24
11.79
610
8.57
2.14
23
11.3
584
7.14
1.78
22
10.8
558
5.71
1.43
20.8
10.2
527
4
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