GE Druck DPI 841 Mode D'emploi page 15

5. To make sure that the calibration is correct, set up the
equipment to do one of these calibration checks:
• Hz input calibration check (Figure 1):
Frequency meter:
Signal generator:
DPI 841/842:
• Hz output calibration check (Figure 2):
Frequency meter:
DPI 841/842:
6. Measure or supply the specified values (Table 10/11):
Hz then kHz. Make sure that the error is in the specified
limits.
Table 10: Hz error limits (Measure/Supply)
Measure/ Calibrator
Supply error (Hz)
Hz
25 0.000175
100 0.0007
250 0.00175
500 0.0035
990 0.00693
Table 11: kHz error limits (Measure/Supply)
Measure/ Calibrator
Supply error (kHz)
kHz
2.5000 0.0175
10.0000 0.07
20.0000 0.14
30.0000 0.21
50.0000 0.35
Calibration - Procedures (mA input)
1. DPI 842 only. Connect the instrument to the calibration
equipment (Figure 5).
2. Let the equipment get to a stable temperature
(minimum: 5 minutes since the last power on).
3. Use the calibration menu (Table 9) to do a three-point
calibration (-FS, Zero and +FS). The display shows the
applicable instructions to complete the calibration.
4. To make sure that the calibration is correct, select the
applicable mA input task (Table 2) and apply these
values:
• mA: -55, -40, -24, -18, -12, -6, 0 (open circuit)
Then mA: 0, 6, 12, 18, 24, 40, 55.
K395 Issue 3
Gate time = one second
Output = 10V, unipolar,
square wave
Input trigger level = 5V (Table 4)
Units (Table 4): Hz or kHz as
specified in Table 10/11.
Gate time = one second
Units (Table 5): Hz or kHz as
specified in Table 10/11.
Permitted
DPI 841/842 error (Hz)
0.002 0.0014
0.002 0.0021
0.004 0.0035
0.006 0.0058
0.011 0.0104
Permitted
DPI 841/842 error (kHz)
0.0002 0.000042
0.0002 0.000112
0.0003 0.000205
0.0004 0.000298
0.0006 0.000483
5. Make sure that the error is in the specified limits
(Table 12).
Table 12: mA input error limits
Applied Calibrator
mA error
(mA)
±55 0.0022
±40 0.0018
±24 0.0014
±18 0.0004
±12 0.0003
±6 0.0002
0 (open circuit) -
Calibration - Procedures (Amplitude output)
1. Connect the instrument to the calibration equipment
(Figure 2).
2. Let the equipment get to a stable temperature
(minimum: 5 minutes since the last power on).
3. Set up the DPI 841/842 with these conditions:
Output Hz = 0 (For direct current output)
Output amplitude: Set to Unipolar (Table 5)
Output waveform = Square Wave (Table 5)
4. Use the calibration menu (Table 9) to do the Square
Wave calibration. The display shows the applicable
instructions to complete the calibration.
Calibration values: Low = 0.1V, High = 20V
5. Change the output waveform to Sine Wave (Table 5).
6. Use the calibration menu (Table 9) to do the
Sine/Triangular Wave calibration. The display shows
the applicable instructions to complete the calibration.
Calibration values: Low = 0.1V, High = 20V
Permitted
DPI 841/842 error
(mA)
0.005
0.004
0.003
0.003
0.002
0.002
0.001
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[EN] English -