EXPLANATION

The CITS880s should be allowed to warm up prior to use in measurement – calibration will be invalid until the warm up period has completed (approximately 20 minutes.) 

At each power up, the CITS880s applies a time delay of approximately 20 minutes to allow for warm up and stabilisation. During this interval, the status bar displays the timer count down until calibration is valid along with a message that calibration is not yet valid: 

The timer is reset each time the instrument is powered up. The CITS requires a 20 minute warmup for the precision electronics to stabilise. The timer is built into the CITS – and you should not power the CITS on and off during the warmup as this will reset the timer. 

Older versions of the CITS (prior to V22.01.26) and DRG Pro (prior to V22.03) had 2 levels of warning as follows:

The CITS 2022 (V22.01.26 and later) and the associated DRG Pro (V22.03 and later) interprets the calibration values from the CITS as follows:

 NOTE

 A legacy log file made during warmup would report a 1 until warmup was complete – and if this log file was opened in a CITS version 22.xx.xx and up this would flag as a “REASON UNKNOWN”.

Also a file from a legacy CITS with an updated DRG Pro would report a 1 until warmup was complete which would flag as a “REASON UNKNOWN”.

The version of CITS and DRG Pro that support the new reporting are as follows: