
The DULCO turb C has three-stage fault detection:
n
Warning, e.g.
[DESC]
– A warning is merely a message on the display that alerts
you to the fact that there is a problem. No alarms are
issued. If, for example, the dessicant alarm is deactivated
and the dessicant is saturated, the LCD display shows the
warning
[DESC]
n
Error
[Err]
– An error
[Err] indicates a fault or problem that can generally
be rectified by the operator. This includes, for example, a
lamp failure
[LAMP] or incorrect calibration [CAL]. If an
error occurs, the sensor continues to display values but the
accuracy of these measured values is uncertain and they
cannot be relied on.
n
Fault
[FAIL]
– A fault
[FAIL] is a system error. This problem cannot be
rectified by the operator. The DULCO turb C must be sent
back to the factory for repair. These faults are faults in the
[CPU], [A/D], [EEPROM] or other units built into the
DULCO turb C. In the event of a fault, the DULCO turb C
will not function correctly and the
[FAIL] message will
appear in the LCD display. Both alarm relays are activated
and the current output is set to 2 mA.
8.6.1 System error messages
Fault message
Possible cause
Measure
[MA]
4 ... 20 mA circuit open
Check cabling
[DESC]
Drying agent saturated
Exchange drying agent. Refer to
Chapter 6.1 ‘Inserting the dessicant’
[LAMP]
Lamp failure
Exchange lamp. Contact customer service
[FLOW]
Flow interrupted
Establish flow
[CLN]
Cuvette ultrasound transducer has no
contact
Rotate the cuvette slightly in order to
improve contact. Exchange the cuvette if
the problem persists.
Cuvette removed
Insert cuvette
[FAIL]
Fatal system errors
Contact customer service
8.6.2 Errors in the process
Error
Possible cause
Process error correction
Displayed values
higher than
expected
Air bubbles in the sample water
Make sure that the drain vent valve is open and
not blocked
Generate back pressure
Install an air bubble trap, accessories, order
number 1037790
Condensate or leaking cuvette
Check cuvette for condensate or leaks
Cuvette dirty
Clean the cuvette
Incorrectly calibrated
Calibrate
Maintenance, troubleshooting and repair
62