-
３１
-
(2) Replacing the sensor of the suction type gas detector PE-2DC
①
Turn OFF the MODE switch 1 on the indicator unit.
②
Loosen the four hexagon socket head bolts (M10×25) that fasten the electric compartment’s cover of PE-2DC
with a M10 hexagon wrench and open the cover.
③
Detach all crimp-style terminals of gas sensor cables and lead-in cables from the trunk terminals.
④
Detach the four screws (M3×15) that fasten the printed wiring board, detach the printed wiring board and gas
sensor holding board, then take out the gas sensor.
⑤
Place the O ring on top of the detection compartment and attach a new gas sensor in the detection
compartment. There is a black dot (•) on the gas sensor. Place the sensor so the dot faces the side where the
gas comes in.
⑥
Pass the gas sensor cables through the gas sensor holding board and printed wiring board then fix them back
onto the detection compartment. (Set the gas sensor holding board onto the detection compartment in the
correct direction.)
⑦
Attach the crimp-style terminals of gas sensor cables and lead-in cables to the trunk terminals.
⑧
Close the electric compartment’s cover then tightly fasten it with the hexagon socket head bolts (M10×25).
⑨
Turn ON the power of the Indicator / Alarm unit and carry out zero adjustment (refer to “5-2. (4) Zero
adjustment”) and span adjustment.
(Refer to “5-6. Maintenance Function.”)
Color of gas
sensor cable
Trunk
cable no.
Color of lead-in
cable
Pink
Black
White
1
2
3
4
Red
Black
White
Green
Fig. 21 Replacing the Sensor of the Suction Gas Detector
Make sure to use washers when attaching
hexagon socket head bolts and screws.
Return used gas sensors to us.
MEMO
red
black
M3×8 (4)
lead-in cable
trunk terminal
printed wiring board
gas sensor holding board
gas sensor
Detection compartment
gas sensor cable
M3×15 (4)
φ
3 spring washer(4)
black dot
electric
compart-
ment
the side where
gas comes in
green
white
φ
3 spring washer(4)
O ring
