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Diagnostics and Messages
194 UDA2182 Universal Dual Analyzer Product Manual January 2009
12.4 Auto Cycle Fail Messages
Overview
Auto Cycle Fail is active whenever an auto cycle failure has occurred. The status
message “Auto Cycle
n Fail” is also displayed during a fail state. Once detected, the
current cycle proceeds immediately to the Probe Insert step (if enabled) or to the Resume
Delay step. The fail state remains for the duration of the Resume Delay, whereupon the
fail state returns to 0 and the fail message is cancelled. A fail state also provides a detail
message in the lower half of the Auto Cycle display regarding the specific reason for the
error. These messages are listed below:
Table 12-3 Auto Cycle Fail Messages
Fail Message Reason
Probe Extract Timeout Probe Transit enabled, Extract Wait Src not None and state not 0
within Max Transit Mins of start of Probe Extract.
Probe Insert Timeout Probe Transit enabled, Insert Wait Src not None and state not 0
within Max Transit Mins of start of Probe Insert.
Input Fault Input board, PV or temperature fault has occurred during calibration
(fault type in status message).
Solution Unstable PH PV or temperature not stable for calibration within elapsed time
limit Max Cal Mins.
Buffer Span Too Low Difference of PV reading for pH Cal 2 (Slope) and that of last pH Cal
1 (zero offset) < 1.8 pH.
Offset Underrange PH calibration has calculated and rejected a zero offset < -2 pH.
Offset Overrange PH calibration has calculated and rejected a zero offset > 2 pH.
Slope Underrange PH calibration has calculated and rejected a slope < 80 %.
Slope Overrange PH calibration has calculated and rejected a slope > 105 %.
Readings Unstable DO PV or temperature not stable for calibration within elapsed time
limit Max Cal Mins.
Probe Current Too Low Probe current is < 5 μA during DO calibration.