Page 2
Start-up procedure
1. Check that the power supply, 230 V AC, is properly
connected.
2. Turn on the equipment by setting the switch ON/OFF
in the ON position.
3. Check that the ACTIVE LED is lit.
4. Check that the yellow PREHEATING LED is lit dur-
ing the preheating period of the sensor, lasts for about
2 minutes. During the preheating period, the alarm
functions are temporarily disconnected.
5. Check the sensor voltage. Normal value 5 V +/-0.1 V.
The sensor voltage is measured between the termi-
nals 1 and 2 in the detector. The adjustment is made
with the potentiometer on the PCB itself. On the
KVC-41 PCB there are two potentiometers, make
the adjustment with the one marked SENS.
NOTE! For correct sensor voltage, measure as
close to the sensor as possible.
Setting procedure
Setting the warning level (1st alarm)
The warning level is set primarly according to class rules,
secondly according to customers whishes, and thirdly
according to Consilium standard, i.e. 25 % LEL for
KVC-41. The set warning level should be noted in the
test protocol.
1. Set the PRESET-RESET switch in the PRESET po-
sition and hold it in this position during the set warn-
ing level procedure.
2. If the yellow WARNING LED is lit, turn the switch
to the RESET position, and turn the potentiometer
WARN counter-clockwise. Thereafter restart from
point 1.
3. Turn the PRESET potentiometer until the instrument
reading has reached the desired warning level.
4. Turn the WARN potentiometer until the yellow
WARNING LED is lit up.
5. Thereafter turn the PRESET potentiometer a little
counter-clockwise.
6. Release the PRESET-RESET switch.
7. Check the warning level setting.
Turn the PRESET-RESET switch to the PRE-
SET position.
The reading of the instrument should slowly rise
from 0 to a value slightly below the warning level
setting.
Turn the PRESET potentiometer slowly clockwise
until the reading exactly has reached desired level.
The WARNING LED should lit up. If not, repeat
from point 1.
Setting the alarm level (2nd alarm)
The alarm level is set primarly according to class rules,
secondly according to customers whishes, and thirdly
according to Consilium standard, i.e. 40 % LEL for
KVC-41. The set alarm level should be noted in the test
protocol.
1. Set the PRESET-RESET switch in the PRESET po-
sition and hold it in this position during the set alarm
level procedure.
2. If the red ALARM LED is lit, turn the switch to the
RESET position, and turn the ALARM potentiometer
counter-clockwise. Restart from point 1.
3. Turn the PRESET potentiometer until the instrument
reading has reached the desired alarm level.
4. Turn the ALARM potentiometer until the red
ALARM LED is lit up.
5. Thereafter turn the PRESET potentiometer a little
counter-clockwise.
6. Release the PRESET-RESET switch.
7. Check the warning level setting.
Turn the PRESET-RESET switch to the PRE-
SET position.
The reading of the instrument should slowly rise
from 0 to a value slightly below the alarm level
setting.
Turn the PRESET potentiometer slowly clockwise
until the reading exactly has reached desired level.
The ALARM LED should lit up. If not, repeat
from point 1.
Turn the PRESET potentiometer slowly clockwise
until the reading of the instrument exceeds the
alarm level. The PRESET-RESET switch can
now be used for alarm test.
