Calibration | 5-11
Automatic verifies can also be set to run at predetermined frequencies
using the cycle times you define using the Set Cal Timers/Set Auto Timers
menu option. Once you’ve set these cycle times, you don’t need to select
the Initiate Verify menu option to run an automatic verify.
See the “Remote Calibration Unit Connections” section in the Installation
chapter for help on how to trigger an automatic calibration using a digital
input. If using a digital input to trigger the auto verify, you must make
sure that for the Setup Key/Remote Switch Config selection must be set to
verify, and not calibrate.
If using the RCU to perform an automatic or remote verify operation,
the verify gas should be placed in the span gas port of the RCU.
Auto Verify
Before you can start an auto verify, you must do the following:
• Entertheverifygasvaluetomatchtheverifygascylinderyouintend
to use to verify your system (Configure Verify).
• Determinetheacceptableverifyrange.
• Definehowlongyouwanttheverifygastoflowthroughthesensor
during the verify operation (Set Cal Timers/Cal Gas Duration). Be sure
to allow enough time for the verify gas to stabilize when you define
this time.
• Defineatimeperiodforthesystemtorecoverfromreadingtheverify
gas to reading process gases (Set Cal Timers/Recovery Duration).
Then you can start the auto verify as follows:
1. Select the Initiate Verify option from the Calibrate key menu.
2. Select Auto Verify.
The system will begin the automatic verify, and will notify you how long
the verify gas will be applied to the sensor from the RCU:
Span/Verify Gas xx:xx
System Verifying Cal
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