15
６−３．
Replacing the sensor
６−３−１．
Replacement frequency of the sensor
To maintain the reliability of the measurement, it is recommendable to replace the sensor
periodically. Our oxygen sensor has an enough life span. However, the actual life is
depending on the operating conditions. Then, replace the sensor once a year as the
tentative deadline for the replacement cycle.
６−３−２．
Replacing the sensor
①
Verify that the indicator/alarm unit is off. If the sensor is disconnected, the indicator/alarm unit
issues an alarm.
②
Turn a lock of detector head and open the front door.
③
Loosen two screws at the top of terminal strip and disconnected two lead (black and white) wires.
④
Push the sensor upword from the bottom of sensor and pull out it from the holder.
⑤
Insert new sensor into the holder and push the sensor until it comes to the end.
⑥
Connect black and white sensor lead wires to the terminal strip. Connect white wire to positive
(+) terminal and black wire to negative (-) terminal respectively.
⑦
Close the front door of the detector head and fasten a lock.
６−３． Replacing the sensor ………………………………………………………
６−３−１． Required kit and tools for calibration……………………………
32
６−３−２． Performing a zero adjustment ……………………………………
34
６−４． Storage or treatment when not in use for a long period…………………
６−５． List of recommendable spare parts for regular replacement ……………
６−３−２． Performing a zero adjustment ……………………………………
34
６−４． Storage or treatment when not in use for a long period…………………
６−５． List of recommendable spare parts for regular replacement ……………
Black lead wire
White lead wire
Terminal strip
Cable
Sensor
Sensor holder
・ Be sure to carry out gas calibration after sensor replacement. If not, correct gas
detection may not be performed.
CAUTION
！
Negative side cable core
Positive side cable core
