Hach-Lange CL17 USER MANUAL - Manual (Page 49)

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Troubleshooting
7.3 System warnings
Recall active warnings using the RECALL WARNINGS function in the alarm menu. To clear
the warnings use the CLEAR WARNINGS function in the alarm menu.
Table 11 System warnings
Warning What the Alarm Indicates
Alarm Display and
Instrument Indication
Resolution
POWER
Power failed. In default condition, this warning
is disabled.
POWER
Inspect wiring and circuit breakers
that deliver power to the CL17.
Low Signal
Reference measurement is less than 2000
A/D counts.
LOWSIG
Clean sample cell
Replace sample cell
Marginal
Gain
A calibration resulted in a gain correction
factor greater than 1.1 or less than 0.9. The
calibration standard and the value that the
operator is attempting to input do not match.
Re-test the calibration standard and perform a
new calibration on the CL17.
MARG G
Set CAL Defaults.
Verify standard value.
Recalibrate the instrument.
Marginal
Zero
A calibration resulted in an offset correction
factor greater than 0.2 and less than 0.5.
MARG Z
Set CAL Defaults.
Verify zero value.
Recalibrate the instrument.
Marginal
Offset
A high offset count was measured with the
LED off. Usually caused by light leaks.
MARG 0
Verify the colorimeter end caps
are firmly screwed in place.
Check for light leaks.