ProMinent DULCOMETER D1C - Fault; Remarks; Troubleshooting

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Operation Note text Symbol Effect
Alarm with ack-
Remarks Remedy
on metering on control
nowledgement
Pause contact
Pause
Stop Stop No/Yes* No further fault check –
Pause/Hold
Unchanged ** No – –
Stop button
Stop
Stop Stop No Relay drops out –
During calibration Basic load Stop No No error processing of –
measured variable
Probe slope too low
Slope Cl low
Basic load Stop No 25 % > sensor slope Check sensor, replace
Probe zero point too high
Slope Cl high
> 200 % of norm slope if necessary
Zero point too low
Zero point low
Basic load Stop No Zero point <3 mA Recalibrate in sample water
Zero point too high
Zero point high
Zero point >5 mA without chlorine
DPD-value <2 % measuring range
DPD > x.xx ppm
No 25 % > sensor slope Recalibrate
> 200 % of norm slope
Buffer distance too small
Buffer distance
Recalibrate
too small !
∆
buffer >2 pH !
Probe zero point too low
pH zero point low
Probe zero point too high
pH zero point high
Check sensor,
Probe slope too low
pH slope low
Basic load Stop No replace if necessary
Probe slope too high
pH slope high
Probe signal too unstable
Measured value
unstable
During servomotor setting
Position feedback wrong
Direction check
Without correct Check connection
Upper position <40 % max. value
Final value small
adjustment the last of relay, potentiometer
Lower position >30 % range
Final value big
valid values are still used Adjust the operation region
of the servomotor correctly
* depending on whether “Alarm on” or “Alarm off” set in “General settings”
** Function PI stable
Fault / Remarks / Troubleshooting
BA_DM_173_03_09_GB.p65 30.03.2009, 12:10 Uhr30