RKI Instruments 35-3001-04 - Manual (Page 20)

16 • 35-3001-04 Carbon Monoxide Sample-Draw Detector
10. Turn on power to the controller.
11. Turn on the controller.
12. Allow the sample-draw detector to warmup for 5 minutes.
13. Calibrate the replacement sensor as described in “Calibration” on page 18.
Replacing the CO Amplifier
1. Turn off the controller.
2. Turn off power to the controller.
3. Open the housing door of the sample-draw detector.
4. Disconnect the red and blue wires coming from the CO amplifier from the AMP 2 position on
the detector/amp terminal strip.
5. Unscrew the two screws in the upper right and lower left corners of the CO flow block then lift
the CO amplifier and sensor off of the flow block.
There is a gasket at the bottom of the flow block. Be sure the gasket stays in place.
6. Disconnect the sensor from the CO amplifier.
7. Plug the CO sensor into the new CO amplifier.
8. Place the sensor and amplifier in the CO sensor cavity.
9. Secure the CO amplifier on the flow block with the two screws you removed in step 5.
10. Reconnect the wires coming from the CO amplifier to the AMP 2 position on the detector/amp
terminal strip.
Connect the red wire to the “+” terminal. Connect the blue wire to the “S” terminal.
NOTE: When the sample-draw detector is first powered up with a new amplifier, the initial
output may be either high or below zero depending on the setting of the span pot. Be sure
to make arrangements so that this does not cause unwanted alarms.
11. Turn on power to the controller.
12. Turn on the controller and place it into normal operation.
13. Allow the sample-draw detector to warmup for 5 minutes.
14. Calibrate the sample-draw detector as described in “Calibration” on page 18.
Replacing the Hydrophobic Filter
1. Open the housing door of the sample-draw detector.
2. Disconnect the filter from the rubber elbows on each end of the filter, then remove the filter
from the sample-draw detector.
3. Install the new filter. Be sure the side of the filter marked “INLET” is connected to the elbow
that is connected to the inlet fitting.
4. Verify that the flow rate is approximately 1.0 SCFH, then close the housing door.
Replacing the Particle Filter
1. Disconnect the tubing routed to the sampling area, if installed, from the particle filter.
2. Disconnect the particle filter from the inlet fitting’s tubing stub.
3. Install the new particle filter onto the inlet fitting’s tubing stub. Be sure the arrow on the
particle filter is pointing toward the inlet fitting.