Calibration Verification - Omega CL25 User Manual

Table 6: Calibration of Calibrator-Mode Resistance Functions
(RTD-Thermistor)
Sensor
Step Select
1 RTD-100
2 RTD-100
3 RTD-100
4 1,000Ω
5 1,000Ω
6 100,000Ω
7 100,000Ω
8 Thermistor
9 Thermistor
10 Thermistor
* exclusive of noise.

2. CALIBRATION VERIFICATION

Calibration is verified with the same instrument hookups as used for calibra-
tion (ie. Figures 12 and 13 for thermocouple functions, Figure 14 for resis-
tance functions).
While one hookup serves to verify all resistance functions (RTD, thermistor,
ohms), a full check-out of thermocouple functions requires a set of calibration
cables for each thermocouple type.
To simplify the verification of thermocouple calibration, software has been
enhanced to reactivate the copper-mode used during calibration. This feature
is available on products that use the following (and later) software revisions:
32
Current
Unit Source
Output Input
1562.0°F 1mA
32.0°F 1mA
–328.0°F 1mA
900.00Ω 1mA
1.00Ω 1mA
90,000Ω 10µA
100Ω 10µA
293.0°F 1mA
77.0°F 10µA
–40.0°F 10µA
Adjust Verify Reading*
P38
√
√
√
√
P51
√
√
√
√
DMM
0.39026v
0.10000
±0.00006v
0.01849
±0.00012v
0.90000
±0.00020v
0.00100
±0.00020v
0.90000v
0.00100
±0.00020v
0.04700
±0.00020v
0.02252
±0.00020v
0.75790
±0.00500v