Copyright 2013 Baker Hughes Company.
140 | DPI
620G Instruction Manual–English
Chapter
12.
Calibration Procedures
4. Use the calibration menu (see Section
12.1) to do a one-point frequency calibration.
Figure
12
-
7: Calibration – Frequency Source CH1 (Range: 50
kHz)
5. Check the calibration is correct.
12.6.3 Frequency Calibration Check
1. Frequency (measure) calibration check.
a. Signal generator:
•
Output = 10
V
•
Unipolar
•
Square wave
b. DPI
620 Genii:
•
Input trigger level = 5
V
•
Units: Hz or kHz as specified in Table
2. Frequency (source) calibration check.
a. Frequency meter:
•
Gate time = 1
second
b. DPI
620 Genii:
•
Units: Hz or kHz as specified In Table
9.
3. Select the applicable Frequency measure or source via the Calibrator Task Menu.
4. Apply the input values:
a. Hz: 0, 990
b. kHz: 10, 50
5. Check the error is within limits. Refer to Table
9.
Table
12
-
8: Hz Error Limits (Measure or Source)
Measure/Source (Hz)
Calibrator Uncertainty
(Hz)
Permitted DPI
620 Genii Error (Hz)
(Measure)
(Source)
100
0.0002
0.0023
0.0026
990
0.0005
0.0050
0.0053
