Copyright 2013 Baker Hughes Company.
134 | DPI
620G Instruction Manual–English
Chapter
12.
Calibration Procedures
Figure
12
-
2: Calibration – Current Measure (Range: 20
mA)
4. Check the calibration is correct.
5. Check the error is in the specified limits. Refer to Table
2.
a. Select the applicable channel Current (measure) function via the Calibrator Task Menu.
b. Apply the values that follow:
mA:
-
55,
-
25,
-
20,
-
10,
-
5, 0 (open circuit)
mA: 0, 5, 10, 20, 25, 55
12.3 Procedures (CH1/CH2): Current (Source)
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. CH1 has only one range (24
mA) while CH2 has two ranges (24
mA and
-
24
mA).
4. Use the calibration menu (see Section
12.1) to do a two-point current source calibration
(0.2
mA and FS) for the relevant channel:
•
CH1 (one range): 24
mA
•
CH2 (two ranges): 24
mA (reverse) and 24
mA (forward)
Table
12
-
2: Current (Measure) Error Limits
Applied (mA)
Calibrator Uncertainty (mA)
Permitted DPI
620 Genii Error
(mA)
±
55
0.00300
0.0055
±
25
0.00250
0.0040
±
20
0.00063
0.0022
±
10
0.00036
0.0016
±
5
0.00025
0.0013
0 (open circuit)
0.00020
0.0010
