RKI Instruments Eclipse - Manual (Page 12)

Eclipse Detector Head Operator’s Manual 12
NOTE: If there is no switch activity for 5 minutes while the screen indicates that the unit
is ready for a span operation, the unit will return to normal operation.
3. Adjust the reading to 20.9 if necessary.
• If the reading is below 20.9, press and hold the optical switch to increase the
reading. Initially the reading increases slowly. If a large adjustment is needed,
continue to hold and after a few seconds the reading will increase at a faster rate.
Release when the desired reading is reached.
• If the reading is above the 20.9, press and release once and then press and hold to
decrease the reading. Initially the reading decreases slowly. If a large adjustment
is needed, continue to hold and after a few seconds the reading will decrease at a
faster rate. Release when the desired reading is reached.
4. Press and the release the optical sensor 3 times. After a few seconds the Eclipse will
return to normal operation.
NOTE: If there is no switch activity for 60 seconds while the screen indicates that the unit
is ready for a zero operation, the unit will return to normal operation.
Replacing Components of the Eclipse
Replacing the gas detector
Note: The entire detector must be changed when necessary for the combustible gas,
oxygen, Cl2, and SO2 versions of the Eclipse. The detectors in the CO and H2S
versions have a replaceable sensor. The entire CO and H2S detectors do not
normally need replacement, just the sensors inside the stainless steel housing.
See the next section, Replacing the CO and H2S Sensors, for directions to replace
the CO and H2S sensors.
1. Turn off or disconnect power at the power source end.
2. Remove the junction box cover.
3. Grasp the round Eclipse nameplate though which the LCD display is visible.
4. Gently pull until the control PCB is pulled away from the junction box. The detector
and power/signal terminal strips are now visible on the interconnect PCB. Take care
not to pull too hard and damage the cable which connects the top and bottom PCB’s.
5. If necessary, disconnect the cable from the interconnect PCB and lay it aside with the
control PCB.
6. Disconnect the detector leads from the detector terminal strip. Note the position of the
color-coded leads as you remove them.
7. Unscrew the detector from the junction box.
8. Guide the detector leads of the replacement detector through the bottom conduit hub
of the junction box, then screw the mounting threads of the detector into the conduit
hub.
9. Connect the detector leads to the detector terminal strip as follows:
• Combustible gas detector.
Red wire to terminal labelled LEL RED, white to terminal labelled LEL WHT,