Rockwell Automation 1732E-IR4IM12R ArmorBlock Dual-Port EtherNet/IP 4-Point Thermocouple and RTD - Manual (Page 53)

Rockwell Automation Publication 1732E-UM004A-EN-E - July 2012 45
Chapter
5
Calibrate Your Modules
Overview The Thermocouple and RTD modules are shipped to you calibrated but
calibration is also made available through the RSLogix 5000 software should you
choose to recalibrate your module to increase accuracy for your specific
application.
This chapter shows you how to calibrate your modules through the
RSLogix 5000 software. It includes the following topics.
To maintain your module’s accuracy specifications, we recommend you use
calibration instruments with specific ranges. The table lists the recommended
instruments for the two modules.
Topic Page
Calibrate the Thermocouple Module 46
Calibrate the RTD Module 49
IMPORTANT Analog I/O modules can be calibrated on a channel-by-channel basis or
with the channels grouped together. Regardless of which option you
choose, we recommend you calibrate all channels on your module each
time you calibrate. This will help you maintain consistent calibration
readings and improve module accuracy.
Calibration is meant to correct any hardware inaccuracies that may be
present on a particular channel. The calibration procedure compares a
known standard, either input signal or recorded output, with the
channel’s performance and then calculating a linear correction factor
between the measured and the ideal.
The linear calibration correction factor is applied on every input or output
same to obtain maximum accuracy.
Module Recommended Instrument Range
1732E-IT4IM12R 0 mV…78.125 mV source ±0.3
μ
V
1732E-IR4IM12R 0…1000
Ω
resistors (1) ±0.01%
(1) We suggest you use these precision resistors.
KRL Electronics - 534A1-1R0T 1.0 Ohm 0.01% / 534A1-487R0T 487 Ohm 0.01%
A precision decade resistor box also can be used that meets or exceeds the required accuracy
specifications. You are responsible for assuring that the decade box maintains accuracy by periodic
calibration.