Copyright 2013 Baker Hughes Company.
144 | DPI
620G Instruction Manual–English
Chapter
12.
Calibration Procedures
c. Check the error is within limits. Refer to Table
12.11 Procedures (CH1): TC mV (Measure or Source)
When recalibrating measure functions for this range, any adjustment will affect the corresponding
source function calibration. The source function must therefore be re-calibrated after adjusting the
measure function.
Note:
To ensure correct calibration when calibrating TC mV measure, the applied voltage values
should be measured at the TC terminals using the recommended calibration equipment. Refer to
Do the procedure as follows:
1. Connect the applicable calibration equipment. Refer to Table
2. Let the equipment get to a stable temperature (minimum: 5
minutes since the last power on).
3. Use the calibration menu (see Section
12.1) to do a three-point TC mV measure/source
calibration with the following points:
•
mV:
-
10, 0, 100
Figure
12
-
10: Calibration – TC mV Measure CH1 (Range: ±
100
mV)
Table
12
-
13: Resistance (Source) Error Limits
Ohms (Ω)
Excitation (mA)
Calibrator Uncertainty
(Ω)
Permitted DPI
620
Genii Error (Ω)
0
0.1
0.0014
0.014
100
0.1
0.0016
0.038
200
0.1
0.0021
0.062
300
0.1
0.0028
0.086
400
0.1
0.0035
0.110
1000
0.1
0.0080
0.310
2000
0.1
0.0160
0.550
3000
0.1
0.0240
0.860
4000
0.1
0.0320
1.100
