TECPak
User’s Manual · Page 23
User Calibration of Resistance Sensors
In some applications, having the ability to compensate, or calibrate, the sensor
measurement is desired, such as referencing to an internal standard or to match
the readings of another instrument. This is supported on the
TECSource
by
using the TEC:USERCAL:PUT command to apply an offset and/or slope
compensation to thermistor or RTD readings.
To prevent accidental modification of the sensor calibration, calibration must first
be enabled with the TEC:USERCAL:EDIT command. By default, the slope and
offset values are 1.000 and 0.00, respectively, but can be adjusted to change the
sensor measurement. The calibrated measurement is computed as follows:
User calibrated reading = slope * r offset
The offset is kilo-ohms (k
Ω
) for thermistors, and ohms (k
Ω
) for RTDs.
Be aware that the there is only a single set of calibration values, and
changing sensor type does not change the calibration data.
Therefore, if you
will be changing between thermistor to RTD sensors, you will need to change
the calibration values as appropriate for the new sensor setting. Changing the
values back to 1.000 and 0.00 will return the instrument to factory calibration.
NOTE
The calibration is applied to the resistance measurement
of the sensor, not the temperature. To adjust the
resistance-to-temperature conversion, change the
thermistor or RTD coefficients as needed.
Summary of Contents for TECPak 585 Series
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