Hach CA610 Manuel De L'utilisateur page 29

Alarm message Description
MOTOR ERROR The pump motor home position was not
found.
ERR TEMP The electrode heater block is not properly
temperature controlled.
8.2 Warning list
A warning message shows when a possible problem condition is present. The instrument continues
operation when a warning condition is present. Refer to
To recall the active warnings, use the RECALL WARNINGS function in the alarm menu. To clear the
warnings, use the CLEAR WARNINGS function in the alarm menu.
Until the surface of the flow cell becomes completely wetted, bubbles may cling to the inside walls
and cause erratic readings. This condition is temporary and the duration depends on the sample
properties. If this condition continues, flush the system with surfactant (2697453) instead of the
sample. Several hours of surfactant flush may be necessary to completely wet the surfaces of the
flow cell.
Warning
POWER
MARG OFFSET
ERR SLOPE (the electrode
slope is less than -20 mV)
MARG SLOPE (the electrode
stop is between -20 mV and
-40 mV)
Table 9 Alarms and resolutions (continued)
Table 10 Warning messages
Definition
Power failed. In default condition,
this warning is disabled.
A high offset count was measured
during calibration.
Standards plumbed incorrectly
Lanthanum crystal tip needs to be
replaced
Electrodes are reversed
The electrode slope is marginal
Resolution
Make sure that the motor is connected to the
main circuit board.
Make sure that the optical switch is
connected to the circuit board. Make sure that
the switch is secure in the chassis.
Replace the motor.
Replace the optical switch.
Replace the main circuit board.
Make sure that the thermistor and heater
resistor cable assemblies are connected into
the correct locations.
Table 10.
Resolution
Inspect wiring and circuit breakers that
supply power to the equipment.
Make sure that the electrode has inner fill
solution. Fill if necessary.
Replace the lanthanum crystal tip.
Replace the fluoride half cell.
Replace the reference half cell.
Make sure that the standards and the
placement of the standards are correct.
Replace the lanthanum crystal tip.
Put electrodes and BNC connectors in
the proper positions.
Replace the lanthanum crystal tip.
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