GE Optica Operator's Manual page 103

Balancing the Sensor
Optics (cont.)
Maintenance
1. Clean the mirror as described in Cleaning the Sensor Mirror on
page 7-1, if you have not already done so. Make sure the sensor
cover is replaced before checking the balance.
2. Set the sensor mode to HEAT and wait one minute for any
condensation to evaporate.
3. The balance indicator should be about 1/2" high (or 1 bar). Turn
the balance screw on the sensor counterclockwise to increase the
bar height, or clockwise to decrease it.
Note: Be sure the mirror cavity is covered while adjusting the
balance screw, since ambient light can cause an error. The
1111H sensor should be installed in the optional pressure boss
or have the cover installed. The D-2 cover should be latched.
On the 1311DR and XR sensors, place your thumb over the
hole (or use a coin, if the sensor is horizontal).
4. Replace the sensor cover, if necessary, and verify that the balance
indicator is still correct. If not, repeat Step 2, being sure that no
light enters the cavity. Return the sensor mode to OPERATE (if
applicable) to stop heating the mirror.
5. Initiate a PACER cycle by pressing the PACER button on the
Optica panel.
At the completion of the PACER cycle, the system is properly
balanced. For more information on the PACER cycle, see The PACER
Cycle on page 1-6.
Finally, initiate a PACER cycle as described above. At the end of this
cycle, the service indicator should not appear and the dew point
reading should be correct.
January 2006
7-3