Examples of Instrument Calibration
138 MC4 User Guide
Temperature Sensors
This procedure suits temperature sensors no matter if they are RTDs
or thermocouples. The sensor's output signal is measured with MC4.
The reference temperature is either measured with MC4 or manually
entered into MC4. i
When measuring the reference temperature, remember the following
conditions:
1. If the sensor to be calibrated is a thermocouple, the reference
sensor needs to be an RTD sensor.
2. If the sensor to be calibrated is an RTD sensor, the reference
sensor needs to be a thermocouple.
If the conditions are not met, the reading of the reference sensor has
to be manually entered into MC4.
Preparations
1. Place the sensor of the instrument and the reference sensor
into the calibration bath/dry block. Connect them to suitable
terminals in MC4. Select one of the available reference junc-
tion methods for the thermocouple:
• MC4's internal reference junction is used.
• The reference junction temperature is fixed to 0°C.
• The reference junction temperature is manually en-
tered.
• The reference junction temperature is measured exter-
nally using an RTD connected to the RTD terminals.
See Part C for additional in-
formation concerning the
reference junction methods.
2. Select the instrument in
MC4 as presented in chap-
ter Selecting the Instru-
ment to Be Calibrated on
page 129 or create a new
instrument as described in
chapter Instrument List
Window Menu on page
152.
3. Test the connections before
starting calibration, i.e. see if
the input and output signal
are "live" in MC4.
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