70
OM-DAQLINK Sensor Inputs
Sensor
Type
Calibration Method
Current
4
– 20 mA
Two-point calibration
Humidity
(Internal)
Digital
Two-point calibration
Temperature
(Internal)
Digital
Two-point calibration
Temperature
(Internal)
PT-100
Two-point calibration and
offset
Temperature
PT-100 2-wire
Two-point calibration and
offset
Temperature
Thermocouple J
Offset calibration
Temperature
Thermocouple K
Offset calibration
Temperature
Thermocouple T
Offset calibration
Voltage
0 to 1 V
Two-point calibration
Voltage
0 to 50 mV
Two-point calibration
Calibration Tips
Prior to any two-point calibration it is recommended to restore factory calibration defaults.
Prior to calibrating any of the thermocouple sensor types, calibrate the Voltage 50 mV sensor as
this will set the gain (slope) of all thermocouple sensor types.
After calibrating 50 mV, TC-J, TC-K or TC-T sensor types for all inputs you can refine the offset
calibration for each input individually.
You may calibrate all thermocouple sensor types at once, or individually.
Prior to calibrating the PT-100 input, you must first perform
Reset Calibration
in the Calibration
dialog.
Two-point Calibration
The two-point calibration sets the gain (slope) and offset (intercept) of the sensor's conversion
function.
Use the two-point calibration to calibrate all OM-DAQLINK sensors except for the
Thermocouples. In some cases you may need to refine your calibration using the fine offset
tuning tool.
Offset Calibration
To calibrate the Thermocouple temperature sensors: TC-J, TC-K and TC-T, first calibrate the 50
mV sensor type. That will set the slope for all Thermocouple temperature sensors. Then
proceed to adjust the offset using the Offset calibration technique.