Test Equipment Depot Druck DPI 811, Руководство пользователя

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11 K345 Issue 4
3. To make sure that the calibration is correct, select the
applicable ohms input task (Table 2).
4. Make a 4 wire connection to the applicable standard
resistor (Table 10) and measure the value (Figure 1).
5. Make sure that the error is in the specified limits
(Table 10).
Table 10: Ohms input error limits
Calibration - Procedures (Ohms 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. Use the calibration menu (Table 9) to do a two-point
calibration for each range.
• Range: 0-399.9
Ω
• Range: 400
Ω
-1999.9
Ω
• Range: 2k Ω -4k Ω
The display shows the applicable instructions to
calibrate each range.
4. To make sure that the calibration is correct, select the
applicable ohms output task (Table 2).
5. Supply the specified values (Table 11). Make sure that
the error is in the specified limits.
Table 11: Ohms output error limits
Calibration - Procedures (mA input)
1. DPI 812 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.
5. Make sure that the error is in the specified limits
(Table 12).
Table 12: mA input error limits
Calibration - Procedures (IDOS UMM)
Refer to the user manual for the IDOS UMM.
When the calibration is complete, the instrument
automatically sets a new calibration date in the UMM.
Standard
Resistor*
(
Ω
)
* Or an equivalent resistance simulator
Resistor
error
(
Ω
)
Permitted
DPI 811/812 error
(
Ω
)
0 (Short circuit) - 0.05
100 0.008 0.05
200 0.013 0.05
300 0.018 0.05
400 0.007 0.05
1k 0.042 0.25
2k 0.052 0.25
4k 0.072 0.50
Ohms
( Ω )
Calibrator
error
( Ω )
Permitted
DPI 811/812 error
( Ω )
0 0.003 0.05
100 0.004 0.06
200 0.005 0.06
300 0.007 0.07
400 0.008 0.07
1000 0.015 0.30
2000 0.026 0.40
4000 0.049 0.80
Applied
mA Calibrator
error
(mA)
Permitted
DPI 811/812 error
(mA)
±55 0.0022 0.005
±40 0.0018 0.004
±24 0.0014 0.003
±18 0.0004 0.003
±12 0.0003 0.002
±6 0.0002 0.002
0 (open circuit) - 0.001