22
LA | 1.01.01
www.mc-techgroup.com
W A R N I N G !
Aggressive condensate possible.
Chemical burns due to aggressive media possible!
Wear protective glasses and protective clothes when dismounting,
repairing or cleaning the sensor!
14.3
ADJUSTMENT OF SENSITIVITY
A standard adjustment of the electronic controllers
LA1.1
and
LA1.4
for a conductivity of 100 µS/cm is
carried out at the factory. In this case, the length of the sensor connection cable is irrelevant.
If a continuous alarm is present after commissioning and the red LED lights up continuously, although
the sensor is dry or if there is no alarm message despite a wet sensor, sensitivity adjustment of the
sensor is necessary.
Adjustment range at the electronic controllers: 50 µS/cm to 1 mS/cm.
The following steps must be carried out for the sensitivity adjustment:
•
Remove the 4 cover screws of the electronic controller
LA1.1
and then remove the cover.
•
Disassemble the sensor and clean and dry the electrodes.
•
In case of permanent alarm with a dry and clean sensor:
o
Turn the potentiometer
“P1” on the
LA1.1
or
the “Sensitivity adj.” screw on the
LA1.4
anticlockwise (to lower sensitivity) until the alarm is out.
o
Then short-circuit the sensor electrodes with a damp finger. The electronic controller
LA1...
must then immediately display the alarm, i.e. the red LED lights up.
•
In case the alarm does not respond, when the sensor electrodes are short-circuited with
a damp finger:
o
Turn the potentiometer
“P1” (
LA1.1
) or
the “Sensitivity adj.” screw (
LA1.4
) clockwise (to
higher sensitivity) until the alarm lights up, i.e. the red LED lights up.
•
For the
LA1.1
electronic controller, screw on the 4 cover screws again.
•
Wipe the electrodes dry with a cloth and reassemble the sensor.
N O T E !
For condensate with low conductivity, do not short-circuit the sensor with a
damp finger. Instead, clean the sensor with distilled water first and then
moisten the sensor with the appropriate condensate.
Summary of Contents for LA Series
Page 26: ...26 LA 1 01 01 www mc techgroup com Figure 8 Flow diagram LA1 1 115 230 V 50 60 Hz ...
Page 27: ...www mc techgroup com LA 1 01 01 27 Figure 9 Flow diagram LA1 1 24V AC DC ...
Page 28: ...28 LA 1 01 01 www mc techgroup com Figure 10 Flow diagram LA1 4 115 230V 50 60Hz ...
Page 29: ...www mc techgroup com LA 1 01 01 29 Figure 11 Flow diagram LA1 4 24V AC DC ...
