Copyright 2013 Baker Hughes Company.
188 | DPI620G Instruction Manual–English
Chapter 12. Calibration Procedures
• Units: Hz or kHz as specified In Table 12-8 or Table 12-9.
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. Do a check that the error is in the limit range. Refer to Table 12-8 or Table 12-9.
12.7 Procedures (CH1): Frequency Amplitude (Source)
Use this procedure:
Note: The procedure that follows, calibrates the “mark” value of the square wave frequency
output. The “space” value is fixed and is approximately -120 mV.
1. Connect the applicable calibration equipment. Refer to Table 12-1.
2. Let the equipment get to a stable temperature (minimum: 5 minutes since the last power on).
3. Set up the equipment as follows:
• Source frequency = 0 (for DC output)
• Waveform = Square.
4. Use the Calibration menu (see Section 12.1) to do a two-point frequency source calibration.
• Point 1 = 0.2 V
• Point 2 = 20 V.
5. To a check to find if the calibration is correct:
a. Set up the equipment as follows:
• Source frequency = 0 (for DC output)
• Waveform = Square.
b. Use the amplitude values that are in Table 12-10: these are applicable to the calibration.
This procedure continues on the next page.
Table 12-8: Hz Error Limits (Measure or Source)
Measure/Source (Hz)
Calibrator Uncertainty
(Hz)
Permitted DPI620G Error (Hz)
(Measure) (Source)
100 0.0002 0.0023 0.0026
990 0.0005 0.0050 0.0053
Table 12-9: kHz Error Limits (Measure or Source)
Measure/Source (kHz)
Calibrator Uncertainty
(kHz)
Permitted DPI620G Error (kHz)
(Measure) (Source)
10 0.00002 0.00023 0.000067
50 0.00002 0.00035 0.000185
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