Copyright 2013 Baker Hughes Company.
English–DPI620G Instruction Manual | 195
Procedures: Pressure Module
12.14 Procedures: Pressure Module
Note: This procedure is suitable for PM620, PM620T or IDOS UPM pressure modules.
Follow this procedure:
1. Assemble the pressure indicator with the necessary pressure module.
2. Connect the instrument to the pressure standard.
3. Let the equipment get to a stable temperature (minimum: 1 hour since the last power on).
4. Use the Calibration menu (see Section 12.1) to do a two-point pressure calibration
(absolute sensors) or three-point pressure calibration (gauge sensor).
• -FS, Zero and +FS for gauge sensors.
• Zero and +FS for absolute sensors.
Note: If the software version requires a three-point calibration for an absolute sensor, use
points at 0, 50% and +FS or three-point calibration. Refer to Table 12-17 or Table 12-18.
Table 12-
1
6: AC Volts (Measure) Error Limits
Applied AC Volts (V) Calibrator Uncertainty (V) Permitted DPI620G Error (V)
5 0.0018 0.030
10 0.0026 0.037
20 0.0042 0.050
Table 12-17: Calibration Pressures (Gauge Sensors)
Pressure Range Nominal Applied Pressure mbar (psi)
mbar (psi)
-FS
a
a. For a three-point calibration, do not apply more than -90% of the specified FS for the unit.
Zero +FS
< 700 mbar (10.0) -FS 0 +FS
> 700 mbar (10.0) -900 (-13.1) 0 +FS
Table 12-18: Calibration Pressures (Absolute Sensors)
Pressure Range Nominal Applied Pressure mbar (psi)
bar (psi) Zero +FS
350mbar (5.0) < 1.0 (0.02) +FS
2bar (30.0) < 5.0 (0.07) +FS
7bar (100.0) < 20.0 (0.29) +FS
20bar (300.0) < 50.0 (0.73) +FS
350bar (5000)
Use atmospheric pressure as
z
e
ro.
+FS
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