RKI Instruments EAGLE 2 Manual - Manual (Page 226)

216 • Maintenance EAGLE 2 Operator’s Manual
Maintenance
The TC sensor does not include any user serviceable parts. This section
includes a procedure for replacing the TC sensor.
Replacing the TC 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 TC sensor. It has a five wire cable with a connector that mates
to a TC sub PCB that is installed on the main PCB and is normally
located in a single sensor flow chamber next to the pump. Figure 37 on
page 205 shows a TC sensor in a typical location.
7. Unscrew and remove the two screws that hold down the TC sensor
bracket.
8. Grasp the TC sensor connector and gently pull it up until it either
disengages from the TC sensor or the TC sensor comes out of the flow
chamber with the connector.
9. If the sensor came out with the connector, remove the sensor from the
connector.
10. If the sensor stayed in the flow chamber, grasp the sensor and pull it out
of the flow chamber.
11. Plug the replacement sensor into the sensor connector on the TC sensor
cable.
12. Insert the TC sensor into the TC sensor chamber in the flow chamber.
13. Line up the holes in the TC sensor retaining bracket with the two
standoffs on either side of the TC sensor chamber.
14. Install the two sensor retaining screws tightening them a little at a time
alternately to push the sensor into its chamber evenly.
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