ProMinent DULCOTROL, General Operating Instructions

Page: 52 / 144

Pr o Minent
®
Page 52
Fault Fault text Symbol Effect Alarm with ack- Remarks Remedy
on metering on control nowledgement
Measured value
Checkout time
measured value exceeded Check H
2
O
2
sensor Basic load Stop Yes Function defeatable Check function of sensor,
extend check time
Signal exceeded/drops below H
2
O
2
input < 3 mA Basic load Stop Yes Signal <3.0 ±0.2 mA Check sensor, transducer and
value H
2
O
2
input > 23 mA or >23 ±0.2 mA cable connection
Calibration sensor with error calibration H
2
O
2
Basic load Stop No Metering continues in Check sensor,
not possible! case of error with un- replace if necessary,
steady measured values recalibrate if necessary
Correction measured variable Pt100-signal >138.5 Ω
Signal exceeded/drops below value temp. input yes Signal <3.0 ±0.2 mA Check sensor, transducer and
or >23 ±0.2 mA cable connection
Value last valid is used
Feed forward control Signal <3.8 ±0.2 mA Check sensor, transducer
Signal drops below value multiplicative feedfwd. < 4 mA Stop Yes or >23 ±0.2 mA and cable connection
additive Value last valid is used
Signal exceeded feedfwd. > 23 mA Yes
Limit transgression H
2
O
2
limit 1 Function defeatable Defi ne cause, reset
after checkout time limit value H
2
O
2
limit 2 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
8.3.3 DULCOMETER
®
D1C and DULCOTEST
®
PER Sensor for
Hydrogen Peroxide, Troubleshooting
Controller
H
2
O
2
Possible values
Initial value Increment Lower value Upper value Remarks
Measured 0.01 % -0.20 % 2.20 % for measurement
value range up to 2 %
0.01 % -0.10 % 1.10 % for measurement
range up to 1 %
1 ppm -200 ppm 2200 ppm for measurement
range up to 2000 ppm
0.1 ppm -20.0 ppm 220.0 ppm for measurement
range up to 200 ppm
0.01 ppm -5.00 ppm 55.00 ppm for measurement
range up to 50 ppm
0.01 ppm -2.00 ppm 22.00 ppm for measurement
range up to 20 ppm
Error message Condition Effect
Calibrate H
2
O
2
not possible! H
2
O
2
slope too low Calibrate again
Sensor slope too low (<25 % of norm slope)
Calibrate H
2
O
2
not possible! H
2
O
2
slope too high Calibrate again
Sensor slope too high (>300 % of norm slope)
H
2
O
2
value too low H
2
O
2
<2 % measuring range
H
2
O
2
> x.xx ppm
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