Omega 26, 27, 25, 24 manual Calibration Verification

Table 6: Calibration of Calibrator-Mode Resistance Functions (RTD-Thermistor)

			Current
	Sensor	Unit	Source			DMM
Step	Select	Output	Input	Adjust	Verify	Reading*
1	RTD-100	1562.0°F	1mA	P38	√	0.39026v
2	RTD-100	32.0°F	1mA			0.10000
					√	±0.00006v
3	RTD-100	–328.0°F	1mA			0.01849
	1,000Ω	900.00Ω			√	±0.00012v
4			1mA			0.90000
	1,000Ω	1.00Ω			√	±0.00020v
5			1mA			0.00100
	100,000Ω	90,000Ω				±0.00020v
6			10µA	P51		0.90000v
7	100,000Ω	100Ω	10µA		√	0.00100
					√	±0.00020v
8	Thermistor	293.0°F	1mA			0.04700
					√	±0.00020v
9	Thermistor	77.0°F	10µA			0.02252
					√	±0.00020v
10	Thermistor	–40.0°F	10µA			0.75790
						±0.00500v
* 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