Calibration - Procedures: Mv/Volts Output; Calibration - Procedures: Hz Input/Output; Calibration - Procedures: Cj Input - GE Druck DPI 880 User Manual

Calibration - Procedures: mV/Volts output

1. Connect the instrument to the calibration equipment
(Figure 4).
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 two-point
calibration (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 mV or Volts output task (Table 2).
5. Then set the output values that are applicable to the
calibration:
• mV: 0 (short circuit), 30, 60, 90, 120
OR
• Volts (V): 0 (short circuit), 3, 6, 9, 12
6. Make sure that the error is in the specified limits
(Table 14 or Table 15).
Table 14: mV output error limits
Output Calibrator
mV error
(mV)
0 (Short circuit) -
30 0.000425
60 0.0008
90 0.001175
120 0.00098
Table 15: Volts (V) output error limits
Output Calibrator
V error
(V)
0 (Short circuit) -
3 0.0000175
6 0.00003
9 0.00005
12 0.000134

Calibration - Procedures: Hz input/output

1. Connect the instrument to the calibration equipment
(Figure 6).
2. Let the equipment get to a stable temperature
(minimum: 5 minutes since the last power on).
3. Set up the equipment with these conditions:
Frequency meter:
Signal generator:
DPI 880:
4. Use the calibration menu (Table 9) to do the calibration.
The display shows the applicable instructions to
complete the calibration.
K405 Issue 1
Permitted
DPI 880 error
(mV)
0.01
0.02
0.03
0.03
0.04
Permitted
DPI 880 error
(V)
0.001
0.002
0.002
0.002
0.002
Gate time = one second
Output = 10V, unipolar,
square wave
Frequency = 990 Hz
Input units = Hz (Table 4)
Input trigger level = 5V (Table 4)
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 6):
Frequency meter:
Signal generator:
DPI 880:
• Hz output calibration check (Figure 6):
Frequency meter:
DPI 880:
6. Measure or supply the specified values (Table 16): Hz
then kHz. Make sure that the error is in the specified
limits.
Table 16: Hz error limits (Measure/Supply)
Measure/ Permitted
Supply DPI 880
error (Hz)
Hz
25 0.002 0.0014
100 0.002 0.0021
250 0.004 0.0035
500 0.006 0.0058
990 0.011 0.0104

Calibration - Procedures: CJ input

1. Connect the instrument to the calibration equipment
(Figure 9).
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 one-point
calibration (+FS). The display shows the applicable
instructions to complete the calibration.
4. To make sure that the calibration is correct, select the
applicable T1 input task (Table 2).
5. Make sure that the DPI 880 gives a probe temperature
that agrees with the temperature on the digital
thermometer ±0.2°F (0.1°C).
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 16.
Gate time = one second
Units (Table 5): Hz or kHz as
specified in Table 16.
Measure/ Permitted
Supply DPI 880
error (kHz)
kHz
2.5000 0.0002
10.0000 0.0002
20.0000 0.0003
30.0000 0.0004
50.0000 0.0006
[EN] English -
0.000042
0.000112
0.000205
0.000298
0.000483
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