RKI Instruments Eclipse - Manual (Page 17)

Eclipse Detector Head Operator’s Manual 17
Setting the Response Reading
NOTE: The following procedure assumes that the oxygen content is not normal (20.9%).
If a fresh air environment can be verified, applying zero air to the sensor is not
necessary when adjusting the span setting.
1. Press and release the optical switch 3 times and then press and hold.
2. After approximately 5 seconds, the following will display: RELEASE to SPAN.
Release your finger at this time and the current reading will display with the message
SPAN in the upper left of the display and an “R” in the upper right indicating that the
Eclipse is ready for a span adjustment.
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. Screw the regulator onto the zero air calibration cylinder.
4. Allow gas to flow over the sensor for 2 minutes.
5. 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 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.
6. Unscrew the regulator from the zero air gas cylinder.
7. Remove the calibration cup from the sensor.
8. Press and the release the optical sensor 3 times. After a few seconds the Eclipse will
return to normal operation.