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Maintenance and Service 85
6
888Xi Advanced Electronics Instruction Manual Section 5: Maintenance and Service
PN 51-6888Xi December 2012
15. Reapply power to the Remote Interface and Probe. When initialization is complete, the
Probe will begin heating up, but an alarm condition will be shown. Prior to using the
Transmitter for measurement purposes, perform one of the following:
a. Recalibrate the O
2
Probe according to the applicable calibration instructions in Section 3.
b. Synchronize the calibration parameters as follows:
i. Press the <DIAG> button once to view the alarms. A “Probe Changed” alarm will be
shown.
ii. Press the <EXIT> button once to enteer the “Diagnostic Menu”.
iii. Use the Up/Down keys to select “3-Acknowledge Alarms”. Press <ENTER>.
iv. Use the Up/Down keys to select “3-Ack Probe Changed”. Press <ENTER>.
v. Use the Up/Down keys to select “1-Get From Probe”. Press <ENTER> twice.
vi. When transfer is complete, press <EXIT> twice to return to the main menu.
5.5.2 AC Relay Board Replacement
Use the procedure that follows to replace and set up the AC Relay board in the 6888Xi.
Replacing an 6888Xi AC ReIay Board
1. Loosen the four screws securing the 6888Xi cover. The screws are captive and do not need
to be completely removed.
2. Swing the 6888Xi cover down to expose the inner components.
3. Tag and disconnect wiring for the Relay In.
4. Slide the AC Relay Board part way out of the 6888Xi enclosure.
5. Tag and disconnect the two 3-position plugs for the AC input and transmitter probe heater
wiring. Remove the AC Relay Board completely from the 6888Xi enclosure.
6. Partially slide the new AC Relay Board into the 6888Xi enclosure. Ensure the board is cor-
rectly aligned within the slots in the enclosure.
7. Connect the two 3-position plugs for the AC input and transmitter probe heater wiring.
Slide the AC Relay Board fully into the 6888Xi enclosure.
8. Reinstall wiring for Relay In. See Figure 5-7 for wiring diagram.
9. Swing the cover up in place and tighten the four screws.
WARNING
Disconnect and lock out power before working on any electrical components.
CAUTION
Installing and configuring an AC Relay Board for the Flame Status Interlock function will dedicate alarm
output 2 for this function. Once configured for Flame Status Interlock, the software will override any
previous alarm assignments for alarm output 2 and not allow it to be used for any other function.