Why doesn't the HI 1771WS update my CAL ID info?

On the HI 1771WS, the CAL ID is only updated when one of the calibration commands is given and is successful. If the HI 1771WS module is giving a success for the calibration command, but the CAL ID information did not update, check to see if there was a "Cal Date or ID Error", bit 7 of read word 1. The most common error would be the date is out of range, but this error can also be caused by the "Calibration Identification", write words 29 and 30, being something other than Upper Case characters. If the Cal ID information is out of range the calibration would still pass, but the Cal ID information would not update.

NOTE:  The HI 1771 WS are now obsolete.