Eagle Home Products Eagle Series User Manual download pdf (Page 63)

Eagle Instruction Manual Appendix C: Non-Standard Toxic Gas Sensors • 57

NOTE: If a non-standard toxics channel displays Zero Fail after the

Demand Zero procedure, adjust the ZERO control (next to

SPAN) until the reading displays the smallest increment

above 0.0. For example, 0.01 or 0.1. Repeat Demand Zero.

Replacing Non-Standard Toxic Gas Sensors

Replace the non-standard toxic gas sensor when:

• The toxic gas channel cannot be calibrated correctly.

• The toxic gas reading cannot be set to zero by the Demand Zero

command or zero potentiometer.

NOTE: RKI Instruments, Inc., recommends that you return the Eagle

for replacement of the non-standard toxic gas sensor. The

following procedure is provided to allow you to replace the

sensor if necessary.

1. Take the Eagle to a non-hazardous location, and turn the power

off.

2. Unscrew the two large screws on the top of the case, then carefully

lift the top of the case and lay it aside.

3. In the front half of the bottom case, locate the sensor you want to

replace. The sensor with wires connected to EC3 on the analog

PCB displays its reading on the third line of the screen. The sensor

connected to EC4 on the analog PCB displays its reading on the

fourth line of the screen.

4. Remove the two screws at the base of the bracket.

5. Lift the sensor assembly up enough to remove the ﬂow adapter

(two screws). The ﬂow adapter is attached to the sensor.

CAUTION:Avoid pulling on sensor wires. Always unplug at the connector.

6. Disconnect the connector from the analog PCB. Note to which

socket (EC3 or EC4) the connector is connected.

7. Remove the sensor assembly from the instrument case.

8. Remove the two screws that secure the sensor assembly to the

bracket.

9. Remove the two screws that secure the sensor to the ampliﬁer,

then remove the sensor from the ampliﬁer. Retain the ampliﬁer for

use with the replacement sensor.

10. Install the replacement sensor in reverse order.

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Eagle Home Products Eagle Series User Manual Page 63