Copyright 2013 Baker Hughes Company.
138 | DPI
620G Instruction Manual–English
Chapter
12.
Calibration Procedures
c. Check the error is within limits. Refer Table
7.
12.6 Procedures (CH1): Frequency (Measure or Source)
Only do one frequency calibration, use either the measure function or the source function.
12.6.1 Frequency Calibration (Measure Function)
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. Set up the equipment as follows:
a. Signal generator:
•
Output = 10
V
•
Unipolar
•
Square wave
•
Frequency = 990
Hz
b. DPI
620 Genii:
•
Input units = Hz
•
Input trigger level = 5
V
Table
12
-
6: Millivolts (Source) Error Limits
Source (mV)
Calibrator Uncertainty (mV)
Permitted DPI
620 Genii Error
(mV)
0
0.00010
0.0080
100
0.00046
0.0125
200
0.00090
0.0170
1000
0.00300
0.1000
2000
0.00600
0.1400
Table
12
-
7: Voltage (Source) Error Limits
Source (V)
Calibrator Uncertainty (V)
Permitted DPI
620 Genii Error
(V)
0
0.000004
0.00042
5
0.000019
0.00070
10
0.000034
0.00010
15
0.000049
0.00013
20
0.000064
0.00160
