RKI Instruments 35-3010A-13, Manual

22 • 35-3010A-13 Sample-Draw Detector

8. Calibrate the replacement sensor as described in “Calibration, H

2

 Detector” on page 23.

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 26.

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.

Replacing the Charcoal Filter

NOTE:

The charcoal filter does not normally need to be replaced in the 35-3010A-13 because it does 
not include a CO sensor.

1. Turn off or unplug power to the controller.

2. Locate the charcoal filter. It is located along the upper edge of the detector housing.
3. Grasp the charcoal filter and pull it out of its metal clamp.
4. Remove the rubber seals from each end of the charcoal filter and remove the filter.
5. Place the new charcoal filter in the same orientation as the one that was removed.
6. Place the new charcoal filter back into the metal clamp.

Adjusting the Low Flow Setting

The factory-set low flow setting is 0.6 SCFH (±0.2). To adjust the low flow setting:

1. Use the flow adjust potentiometer (VR1) to set the flow to 0.6 SCFH.

If the sample-draw detector goes into low flow alarm before you can adjust the flow down to 0.6 
SCFH, adjust the low flow potentiometer 1/4 turn clockwise, then attempt to set the flow again. 
Repeat this step until you are able to adjust the flow to 0.6 SCFH.

2. Slowly turn the low flow potentiometer counterclockwise just until the sample-draw detector goes 

into low flow alarm.