RKI Instruments 35-3010RKA-08 User Manual
Page 22
18 • 35-3010RKA-08 Sample-Draw Detector
4.
If the calibration/response difficulties continue, replace the sensor as described later
in this section.
5.
If the calibration/response difficulties continue, contact RKI Instruments, Inc. for
further instruction.
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 Hydrophobic Filter
1.
Turn off or unplug power to the controller.
2.
Locate the hydrophobic filter. It is just to the left of the main circuit board.
3.
Grasp the hydrophobic filter and pull it out of its metal clamp.
4.
Remove the rubber seals from each end of the hydrophobic filter and remove the
filter.
5.
Place the new hydrophobic filter in the same orientation as the one that was removed.
6.
Place the new hydrophobic filter back into the metal clamp.