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Chapter 4. Maintenance
4.3 Maintenance – Cleaning
CAUTION
This can damage the sensor in the unit.
1.
If necessary, remove the unit.
2.
Clean the unit with a lint-free cloth and a soft brush. If necessary, make the cloth
moist with a weak solution of detergent.
3.
Allow the unit to dry before use.
4.4 Maintenance – Calibration
BHGE supplies a calibration certificate with the pressure transducer. When it is necessary to
recalibrate the pressure transducer, use the procedure that appears below (BHGE
recommends a minimum interval of once a year).
Note: BHGE can provide a calibration service that is traceable to international
standards.
4.4.1 Calibration – Equipment
BHGE recommends the use of these items of equipment to calibrate the unit:
• Pressure source - minimum accuracy: 0.01% of reading
• Digital thermometer - minimum accuracy: 1 °C
• A CANopen software package to get access to the contents of the CANopen Object
Dictionary (refer to Appendix A., "CANopen Object Dictionary," on page 19).
4.4.2 Two-Point Pressure Calibration – Procedure
Note: 0x identifies a hexadecimal value. Object 0x1800 02 = Index 0x1800, Sub-index
0x02 (refer to Appendix A., "CANopen Object Dictionary," on page 19).
To get accurate results, calibrate in conditions where the pressure and temperature are
stable.
1.
Record the current values for the calibration data:
• Object 0x2207 00 (Pressure Gain) = GAIN
Default value = 1
• Object 0x2208 00 (Pressure Offset) = OFFSET
Default value = 0 mbar
2.
First calibration point:
a.
Apply Pressure (AP1) at 10% of the full-scale pressure (in mbar) and allow the
pressure to become stable.
b.
Record the Field Value (FV1) that appears in object 0x6100 01 (Pressure
Value). Record the value in mbar.
3.
Second calibration point:
16 | DPS 5000 Series Instruction Manual-English
Do not use high-pressure gas to remove dirt from the unit.
© 2018 Baker Hughes, a GE company – All rights reserved.
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