Rockwell Automation 1797-IRT8 FLEX Ex Thermocouple/RTD/mV Input Module User Manual - Manual (Page 53)

1 Publication 1797-6.5.2 - February 2001
Chapter
5
Calibrating Your Module
What This Chapter
Contains
Use this chapter to calibrate the thermocouple/RTD/mV input
module. We tell you about:
When and How to
Calibrate Your FLEX Ex
Thermocouple/RTD/mV
Input Module Your module is shipped to you already calibrated. If a calibration
check is required, the module must be in a FLEX Ex I/O system.
Perform module calibration periodically, based on your application.
Module calibration may also be required to remove module error due
to aging of components in your system.
Use one of the following general methods to calibrate your module:
•
Use intrinsically safe equipment to calibrate the module.
•
Use factory trained personnel under controlled conditions to
calibrate the modules with non-intrinsically safe equipment to
maintain your module’s intrinsic safety certification.
For information on See page
When and How to Calibrate Your TC/RTD Module. . . . . . . . . . . . . . . . 5-1
Tools and Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
Calibration Method 5-2
ATTENTION
!
Your FLEX Ex thermocouple/RTD/mV modules are
intrinsically safe equipment. This module cannot be
used in instrinsically safe environment after having
been exposed to non-intrinsically safe signals.
ATTENTION
!
With the second method, extreme care must be
exercised by the calibration personnel to avoid
compromising the intrinsically safe characteristics or
your modules. This method may never be used in a
hazardous environment.