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Calibrating I/O

Calibrating Temperature Input

To calibrate an Analog (Temperature) input channel, read the section that applies to the type of input
you are calibrating. Note that calibration will be done for the active channel configurati on; for
example, if Channel A1 is set to thermocouple, you cannot calibrate it for RTD. During the
calibration process, you will be asked to apply th e minimum and maximum range value to the
channel in either mV or Ohms; for examp le, to calibrate for thermocouple J 0 to 760C, you will be
prompted to first apply -80mV and then +80mV to the chann el.
Also, you cannot actively calibrate disabled channels (although if you enable the channel and then set
it for the type of thermocouple or RT D th at has already been calibrated on another channel, it will
also be calibrated).

Calibrating Thermocouple

When calibrating the IOLAN Analog input for thermocouple, you will need a calibration meter that is
better than .15% accuracy. When you calibrate one channel, all thermocouple channels are
automatically calibrated for that range; if another chan nel is set for a different range, you will need to
calibrate that channel separately, but all channels that use that range are automatically calibrated.

Calibrating RTD

When calibrating the IOLAN Analog input for RTD, you will need a resistor that is better than .05%
Ohms accuracy. When you calibrate one channel, all RTD channels are automatically calibrated for
that range; if another channel is set for a different range, you will need to calib rate that channel
separately, but all channels that use that range are automatically calibrated.

Calibrating Analog Channels

Analog Input can be calibrated for Analog and Temperature IOLAN models.
Select the channel you want to calibrate. Th is examp le uses an A4 model that has channel A1 set to
Current with a Range of 0 to 20mA.
If you have not disabled confirmation messages (Tools, Options in DeviceManager only), you will
get prompted to verify channel calibration.
Click Yes to proceed with calibration. You are now prompted to apply 0 mA to the positive (+) and
negative (-) terminals. Once that is done, click Yes to proceed.