Technical User Guide
6
DOL 53
LED indication
Sensor status
Action
DOL 53 housing is defective.
Replace the DOL 53 housing, contact the sup-
plier.
Alternating GREEN
and YELLOW
Sensor is war
m
ing up to be
ready
for measurements, signal
level 0
V.
No activity. Flashing stops after max. 30 minutes.
Constant GREEN
Normal operation.
GREEN flashing
quickly
The concentration of ammonia is
between 40-60ppm which is used
for testing the sensor. The sensor
is working but it thinks it is in test
mode.
No activity. Flashing stops after max. 5 minutes.
Constant YELLOW
Internal fault detected by electron-
ics, signal level 0 V.
Replace the DOL 53 housing.
YELLOW flashing
There is very little ammonia in the
livestock house - under -5ppm, the
sensor output is 0V.
Replace the sensor element, if the fault continues
for more than one day.
GREEN flashing
Concentration measurement is
above 105ppm outside the mea-
suring range.
Ventilate with fresh air.
GREEN/GREEN/
GREEN/YELLOW
Age monitoring, sensor element is
older than 3 years, service life is
expired, see date on sensor ele-
ment type plate.
Replace the sensor element.
7 Trouble shooting instructions
Error
Cause
Action
Packaging is damaged.
Damage in transit.
Contact the supplier in case the sensor
element is damaged.
No measurement on the control
unit.
Electrical connection faulty or in-
terrupted.
Check installation for cable break.
DOL 53 aligned incorrectly, not
vertical.
Install the sensor in accordance with
mounting instructions, ve/- 15°.
Sensor element is faulty or used
up.
Replace the sensor element.
DOL 53 housing is defective.
Replace the DOL 53 house.
Incorrect measurement on the
control unit.
The dust filter is clogged.
Replace the dust filter.
Check the sensitivity with test gas.
Unexpected measurement on
the control unit.
Brief interference pulses <5 sec-
onds.
Interference caused by electrical equip-
ment, e.g. lighting, fans or heaters. Iden-
tify device and suppress interference.
Unstable measured value.
Dynamic signal fluctuations with
a period of more than 5 seconds
can arise from turbulence with
fresh air.
No activity, continue to monitor.
Wet sensor.
DOL 53 was cleaned with water. Wipe DOL 53 dry.
