Pr
o
Minent
®
Page 78
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
Pl-part
frozen
Stop button
Stop
Stop
Stop
No
Relay drops out
–
During calibration
Basic load
Stop
No
No error processing of
–
Sensor
measured
variable
Buffer spacing too small
Buffer distance
Recalibrate
too small!
Δ
buffer >2 pH!
Sensor zero point too low
pH zero point low
Sensor zero point too high
pH zero point high
Sensor slope too low
pH slope low
Basic load
Stop
No
Check sensor,
Sensor slope too high
pH slope high
replace if necessary
Sensor signal too unsteady
Measured value
unsteady
During servomotor setting
Check
connection
Position feed back wrong
Direction check
Without correct
of relay, potentiometer
Upper position <40 % max. value
Final value small
adjustment the last
Adjust the operation region
Lower position >30 % range
Final value big
valid values are still used
of the servomotor correctly
*dependent on whether “Alarm on” or “Alarm off” is set in “General settings”
Fault
Fault text
Symbol
Effect
Alarm with ack- Remarks
Remedy
On metering On Control
nowledgement
Measured value
Checkout time measured value
Check pH sensor
Basic load
Stop
Yes
Function can be
Check function of sensor,
exceeded
switched off
extend check time
Signal exceeded/drops below
Check pH input
Basic load
Stop
Yes
Signal <3.0 mA ±0.2 mA Check sensor, transducer and
value
or >23 mA ±0.2 mA
cable connection
Calibration with error
pH calibration
Basic load
Stop
No
Metering continues in
Check sensor, replace
defect
case of error with un-
if necessary,
steady measured values
recalibrate if necessary
Correction variable
Pt100-Signal
>138.5
Ω
Signal exceeded/drops below
Temp. input
.
Basic load
Stop
Yes
Signal <3.0 ±0.2 mA
Check sensor, transducer and
value
or >23 ±0.2 mA
cable connection
Value last valid is used
Feed forward control
Check feed forward
Yes
Signal <4.0 mA ± 0.2 mA Check sensor, transducer and
Signal exceeded/drops below
input
or >23 mA ± 0.2 mA
cable connection
value
Value last valid is used
Limit transgression
pH limit 1
Function can be
Defi ne cause, reset
after checkout time limits
pH limit 2
switched off
values if necessary
Control “on”
Yes
Control “off”
Stop or
Stop
Yes
Basic load
Servomotor
Position not reached
Servomotor defective
Yes
Servomotor closes
Check servomotor
Electronics error
System error
Stop
Stop
Yes
Elektronic data defective
Call in service
pH
8.6.3
DULCOMETER
®
D1C and DULCOTEST
®
PHEP or PHER Sensor for pH,
Troubleshooting
Controller and Sensor
Error
Messages
Error messages and information are indicated on the bottom line in the permanent display 1.
Errors to be acknowledged (acknowledgement switches off the alarm relay) are indicated by
the „ “ . Errors/notes which still apply after acknowledgement are indicated alternately. During
correction variable processing (temperature for correction of pH-value), the value is indicated in
the same line as the error/note. Faults which are rectifi ed of their own accord due to changed
operating situations are removed from the permanent display without the need for acknowledge-
ment.
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24.02.2009 11:56:08 Uhr
24.02.2009 11:56:08 Uhr
