EAGLE 2 Operator’s Manual
Maintenance • 211
If the infrared CO
2
channel cannot be adjusted to the proper value, a screen displays
that indicates a calibration failure and indicates that the infrared CO
2
sensor failed to
calibrate.
The buzzer and alarm LEDs activate in a double pulsing pattern. Press and release the
POWER ENTER RESET button to reset the alarm and continue to the Calibration
Mode Screen. Attempt to calibrate the infrared CO
2
channel again. If the failure
continues, investigate the cause. See “Troubleshooting” on page 67.
41. Disconnect the tubing from the probe.
42. Unscrew the demand flow regulator from the calibration cylinder.
43. Use the RANGE
▼
SHIFT button to place the cursor next to the
NORMAL
OPERATION
menu option, then press and release the POWER ENTER RESET
button to return to Measuring Mode.
Maintenance
This section includes a procedure for replacing an infrared CO
2
sensor.
Replacing the IR CO
2
Sensor or Changing Sensor Type
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 infrared CO
2
sensor. It has a twelve wire cable with a connector that mates
to an infrared sub PCB that is installed on the main PCB and is normally located next
to the pump. Figure 40 on page 201 shows an infrared CO
2
sensor in a typical
location.
7. Unscrew and remove the two screws that hold down the infrared CO
2
sensor bracket.
8. Grasp the sensor firmly and pull it out of the infrared CO
2
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
infrared CO
2
sensor to unlock it.
10. Unplug the old infrared CO
2
sensor from the cable.
FAILED SENSOR
ENTER TO CONTINUE
<CO2>
www.
.com
information@itm.com
1.800.561.8187