Thermo Fisher Scientific C101 Colorimeter - Manual (Page 49)

Calibration: Cyanuric Acid
C401/102 Colorimeter
45
NOTE: If you wish to abort this calibration process, do NOT press the
READ/ENTER key as in step 17. Press the ZERO key
instead. The meter will display [AbRT] and CAL
annunciator to signify that the calibration has been
aborted without saving the calibration value. The meter
will then return to the beginning of the user calibration
as in step 3.
NOTE: If an error occurs during calibration, the display will present an error
message. Please refer to Section 4
Troubleshooting Guide for details.
CAL