Copyright 2013 Baker Hughes Company.
142 | DPI
620G Instruction Manual–English
Chapter
12.
Calibration Procedures
•
Nominal positive full-scale ohms - make a 4-wire connection to the 400
Ω resistor.
b. Range: 400
Ω
-
4k
Ω
•
Nominal 400
Ω - make a 4-wire connection to the 400
Ω resistor.
•
Nominal positive full-scale ohms - make a 4-wire connection to the 4k
Ω resistor.
Figure
12
-
8: Calibration – Resistance Measure CH1 (Range: 400
Ω)
4. Check the calibration is correct
a. Select the applicable Resistance (measure) function via the Calibrator Task Menu.
b. Make a 4-wire connection to the applicable standard resistor and measure the value.
c. Check the error is within limits. Refer to Table
12.9 Procedures (CH1): True Ohms (Measure)
Do the procedure as follows:
1. Repeat procedure in Section
12.8; in step 3 and 4 select ‘True Ohms’.
Table
12
-
11: Resistance (Measure) Error Limits
Standard Resistor (Ω)
Resistor Uncertainty (Ω)
Permitted DPI
620 Genii Error
(Ω)
0 (short circuit)
–
0.020
100
0.002
0.032
200
0.004
0.044
300
0.006
0.056
400
0.008
0.068
1000
0.020
0.300
2000
0.040
0.410
4000
0.080
0.640
