Rockwell Automation 1732E-OF4M12R ArmorBlock Dual-Port EtherNet/IP 4-Point Analog Input/Output - Manual (Page 61)

Rockwell Automation Publication 1732E-UM005A-EN-E - July 2012 53
Chapter
5
Calibrate Your Modules
Overview The Analog Input and Output modules are shipped to you calibrated but
calibration is also made available through the RSLogix 5000 software should you
choose to recalibrate to increase module accuracy for your specific application.
This chapter shows you how to calibrate your modules.
It includes the following topics.
Difference of Calibrating an
Input Module and an Output
Module Although the purpose of calibrating analog modules is the same for input and
output modules, to improve the module’s accuracy and repeatability, the
procedures involved differs for each.
• When you calibrate input modules, you use current or voltage calibrators
to send a signal to the module to calibrate it.
• When you calibrate output modules, you use a digital multimeter (DMM)
to measure the signal the module is sending out.
To maintain your module’s accuracy specifications, we recommend you use
calibration instruments with specific ranges. The table lists the recommended
instruments for each module.
Topic Page
Difference of Calibrating an Input Module and an Output Module 53
Calibrate the Input Module (1732E-IF4M12R) 54
Calibrate the Output Module (1732E-OF4M12R) 58
IMPORTANT The analog input module can be calibrated on a channel-by-channel basis
or with the channels grouped together, while the output module only
allows for channels to be calibrated one at a time. 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.