Baker Hughes Druck DPI 620 Genii, Instruction Manual

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Copyright 2013 Baker Hughes Company.
English–DPI 620G Instruction Manual | 131
Before Starting
12. Calibration Procedures
Druck can provide a calibration service that is traceable to international standards.
Druck recommends returning the instrument to the manufacturer or an approved service agent
for calibration. If using an alternative calibration facility, check that it uses the standards that follow
in this chapter.
12.1 Before Starting
Use only original parts supplied by the manufacturer. To do an accurate calibration, use the
following:
•
Calibration equipment specified in Table 12 - 1.
• Stable temperature environment: 21 ± 1°C (70 ± 2°F).
Before starting a calibration procedure, it is recommended leaving the equipment in the
calibration environment for a minimum of two hours.
Before starting the calibration, check the time and date on the instrument are correct.
Table 12 - 1: Calibration Equipment Specification
Function
Calibration Equipment
a
Measure Source
Current (CH1 or CH2) Current (mA) calibrator.
For accuracy, see Table
12 - 2,
Current (mA) calibrator.
For accuracy, see Table
12 - 3.
Voltage (CH1) Voltage calibrator.
For accuracy, see Table
12 - 5.
Voltage calibrator.
For accuracy, see Table
12 - 7.
Voltage (CH2) Voltage calibrator.
For accuracy, see Table
12 - 5.
–
Millivolts (CH1) Voltage mV calibrator.
For accuracy, see Table
12 - 4.
Voltage mV calibrator. For
accuracy, see Table 12 - 6.
Millivolts (CH2) Voltage mV calibrator.
For accuracy, see Table
12 - 4.
–
Millivolts TC mV (CH1) Voltage mV calibrator.
For accuracy, see Table
12 - 14.
Voltage mV calibrator.
For accuracy, see Table
12 - 14.
Frequency (CH1) Signal generator.
Total error: 0.3
ppm or better
Frequency meter.
Total error: 0.3
ppm or better.
Resolution: 8 digits (minimum).
Voltage calibrator.
For accuracy, see Table
12 - 7.
Resistance (CH1) Standard resistor (100R, 200R,
300R, 400R, 1k, 2k, 4k).
Total uncertainty: 20
ppm or
better.
An ohmmeter or an RTD
measurement system with the
specified excitation currents, refer
to Table 12 - 13.
Cold Junction (CH1) Calibrated K type thermocouple.
Accuracy: 50
mK for - 5 to 28°C (23
to 82.4°F)
Accuracy: 50 mK for - 5 to 28°C (23
to 82.4°F)
Cold Junction (CH1) Thermocouple temperature
reference unit (0°C).
Accuracy: 30
mK
–