RKI Instruments 35-3010RK-07 User Manual
Page 20
16 • 35-3010RK-07 Sample-Draw Detector
Replacing Components of the Sample Draw Detector
This section includes procedures to replace the sensors, the hydrophobic filter, and the
charcoal filter.
Replacing the IR CH
4
Sensor
1.
Turn off or unplug incoming power.
2.
Unscrew the four screws that hold the circuit board on the flow block.
3.
Pull the circuit board off the flow block.
4.
Unplug the infrared detector from the circuit board.
5.
Plug the new detector into the circuit board.
6.
Reinstall the circuit board to the flow block.
7.
Turn on or plug in power.
8.
Calibrate the replacement sensor as described in “Calibration, IR CH
4
Detector” on
page 20.
Replacing the Oxygen Sensor
1.
Turn off incoming power.
2.
Open the housing door of the sample draw detector.
3.
Unscrew and remove the two screws that secure the retaining plate, then lift the plate,
connector, and sensor out of the housing.
4.
Unplug the connector from the socket that leads from the sensor.
5.
Plug the socket of the replacement sensor into the connector.
6.
Place the sensor in the oxygen sensor cavity, then position the retaining plate on the
two standoffs.
7.
Secure the retaining plate to the standoffs with the two screws you removed in step 3.
8.
Turn on incoming power.
9.
Calibrate the replacement sensor as described in “Calibration, Oxygen Detector” on
page 21.
Replacing the Hydrogen Sulfide Sensor
1.
Turn off incoming power.
2.
Open the housing door of the sample draw detector.
3.
Unscrew the 5 screws that retain the preamp circuit board.
4.
Lift the preamp circuit board away from the flow block.
Be careful not to pull on the cables that connect the preamp circuit to the main circuit
board.
There is a foam gasket in the bottom of each flow cavity beneath the circuit board.
Make sure the gaskets stay in place.
5.
Pull the H
2
S sensor off the preamp circuit board. It is located in the amp 2 position
(right side) of the preamp circuit board.
6.
Plug the new sensor into the preamp board.
7.
Reinstall the preamp circuit board with the sensors onto the flow block.
8.
Turn on incoming power.