Procedures: Cj Input; Procedures: Rtd (Ohms) Input; Procedures: Rtd (Ohms) Output - GE Druck DPI 880 User Manual

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).
Calibration - Procedures: RTD (Ohms) input
1. Let the equipment get to a stable temperature
(minimum: 5 minutes since the last power on).
2. Use the calibration menu (Table 9) to do a two-point
calibration for each range.
• Range: 0-399.9Ω
a. Nominal zero ohms: Make a 4 wire connection to
the 0Ω resistor (Figure 7).
b. Nominal positive full-scale ohms: Make a 4 wire
connection to the 400Ω resistor (Figure 7).
• Range: 400Ω-4kΩ
a. Nominal zero ohms: Make a 4 wire connection to
the 400Ω resistor (Figure 7).
b. Nominal positive full-scale ohms: Make a 4 wire
connection to the 4kΩ resistor (Figure 7).
The display shows the applicable instructions to
calibrate each range.
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 18) and measure the value (Figure 7).
5. Make sure that the error is in the specified limits
(Table 18).
Table 18: RTD (Ohms) input error limits
Standard Resistor
Resistor* error
(Ω) (Ω)
0 (Short circuit) -
100 0.008
200 0.013
300 0.018
400 0.007
1k 0.042
2k 0.052
4k 0.072
* Or an equivalent resistance simulator
16
- [EN] English
Permitted
DPI 880 error
(Ω)
0.05
0.05
0.05
0.05
0.05
0.25
0.25
0.50
Calibration - Procedures: RTD (Ohms) output
1. Connect the instrument to the calibration equipment
(Figure 8).
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: 0-399.9Ω
• Range: 400Ω-1999.9Ω
• Range: 2kΩ-4kΩ
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 19). Make sure that
the error is in the specified limits.
Table 19: RTD (Ohms) output error limits
Ohms Excitation
(Ω) (mA)*
0 0.50 to 3.0
100 0.50 to 3.0
200 0.50 to 3.0
300 0.50 to 3.0
400 0.50 to 3.0
1000 0.05 to 0.8
2000 0.05 to 0.4
4000 0.05 to 0.3
* Refer to "Specification"
Calibrator Permitted
error DPI 880 error
(Ω) (Ω)
0.003 0.05
0.004 0.06
0.005 0.06
0.007 0.07
0.008 0.07
0.015 0.30
0.026 0.40
0.049 0.80
K405 Issue 3