Issue 1
10-8 Calibration procedures K0460 - [EN] English
3. Set-up the equipment with these conditions:
4. Use the calibration menu (Section 10.3) to do a one-point
calibration then do the calibration checks (step 5).
Calibration check 5. To make sure the frequency calibration is correct, set-up the
equipment to do one of these calibration checks:
• Frequency (measure) calibration check (Section 3.2.8):
• Frequency (source) calibration check (Section 3.2.8):
6. Measure or source the specified values (Table 10-8 or
Table 10-9): Hz then kHz. Make sure the error is in the
specified limits.
Frequency meter: Gate time = one second
DPI 620-IS: Waveform = Square;
Amplitude = 10 V;
Frequency = 990 Hz
Signal generator: Output = 10 V, unipolar,
square wave
DPI 620-IS: Input trigger level = 5 V
Units: Hz or kHz as specified in
Table 10-8 or Table 10-9.
Frequency meter: Gate time = one second
DPI 620-IS: Units: Hz or kHz as specified in
Table 10-8 or Table 10-9.
Table 10-8: Hz error limits (measure/source)
Measure/
source Hz
Calibrator
uncertainty (Hz)
Permitted
DPI 620-IS error (Hz)
(measure) (source)
100 0.0002 0.0023 0.0026
990 0.0005 0.0050 0.0053
5000 0.0002 0.00035 0.000185
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