RKI Instruments EAGLE 2 Manual - Manual (Page 210)

200 • Maintenance EAGLE 2 Operator’s Manual
the ESM-01 chamber.
14. Install the two sensor bracket screws.
15. Confirm that the main PCB is seated in its slots and that its bottom edge
is resting on the bottom of the bottom case. If the main PCB is not seated
properly, it may be damaged when the top case is re-installed.
16. Make sure that the top case gasket is fully seated in its groove and
carefully put the top case back on the bottom case. If you have any
difficulty mating the top and bottom cases, inspect the placement of the
main PCB and the placement of the top case gasket.
17. Turn the EAGLE 2 upside down and tighten the three case screws to
secure the top case to the bottom case.
18. Calibrate the ESM-01 channel as described in “ESM-01 Calibration” on
page 181.
Replacing the H
2
S Scrubber in the SO
2
and HCN Sensors
1. Verify that the EAGLE 2 is off.
2. Place the EAGLE 2 upside down on a flat surface or hold it upside down.
3. Unscrew the three case screws until they disengage from the top case.
They are captive screws so they will not fall off of the bottom case.
4. Turn the EAGLE 2 right side up and carefully lift the top case away from
the bottom case. Be careful not to lift it so far that it pulls on the main
PCB with the cable that connects the top case to the main PCB.
5. Lay the top case down next to the bottom case to allow access to the flow
system.
6. Locate the ESM-01 sensor. It has a twelve wire cable with a connector
that mates to an ESM-01 sub PCB that is installed on the main PCB and
is normally located next to the pump. Figure 35 on page 180 shows an
ESM-01 sensor in a typical location.
7. Unscrew and remove the two screws that hold down the ESM-01 sensor
bracket.
8. Grasp the sensor firmly and pull it out of the ESM-01 flow chamber.
Rock it back and forth gently if necessary to pull it out. Take care not to
pull the cable from the sub PCB.
9. Rotate the locking lever counterclockwise on the cable connector that
mates to the ESM-01 sensor to unlock it.
10. Unplug the ESM-01 sensor from the cable.
11. The ESM-01 sensor consists of an electrolyte reservoir assembly retained