RKI Instruments EAGLE 2 Manual - Manual (Page 181)

EAGLE 2 Operator’s Manual Maintenance • 171
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.
24. 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.
25. Turn the EAGLE 2 upside down and tighten the three case screws to
secure the top case to the bottom case.
26. Calibrate the PID channel as described in “PID Calibration” on page 143.
Replacing the PID Sensor
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 PID sensor adapter. It has a five wire cable and is normally
located next to the pump. The cable has a connector that mates to a PID
sub PCB that is installed on the main PCB. Figure 25 on page 137 shows
a PID sensor in a typical location.
7. Grasp the sensor adapter firmly and pull it out of the PID flow chamber.
Rock it back and forth gently if necessary to pull it out.Take care not to
pull the cable connector from the PID sub PCB.
8. The PID sensor protrudes from one end of the sensor adapter. Grasp the
old PID sensor firmly and pull it out of the sensor adapter.
9. Carefully line up the new PID sensor’s pins with the sockets in the
bottom of the sensor adapter and gently lower the sensor into the adapter
until you feel it contact the bottom.
10. Do not attempt to push the sensor in farther once it makes contact with
the bottom of the adapter until you are sure that the sensor’s pins are
engaged with the sockets. If you feel that the pins did not engage the
sockets, slightly rotate the sensor back and forth without putting pressure
on it until you feel the pins engage the sockets.
11. Push the sensor into the sockets until it bottoms out.