Emerson Rosemount 700XA Reference Manual page 93

July 2020
If no voltage is measured, you may need to replace the photomultiplier tube (PMT) module or extension cable.
2. Remove black plate.
Igniter shall glow red while igniting or if you apply 3 Vdc to pins 1 and 2 on burner end. Do not apply more than 3.3. Vdc
to igniter. Do not apply voltage to igniter for more than 20 seconds.
Remove the flame photometric detector (µFPD) burner
Use this procedure and refer to assembly drawing DE-22143 to replace the µFPD burner.
WARNING
EXPLOSION HAZARD
Failure to de-energize the analyzer may cause serious injury or death to personnel.
Do not open when energized or when an explosive atmosphere may be present.
Keep cover tight while circuits are live.
WARNING
BURN HAZARD
Internal components may be hot. Failure to allow the GC to cool down may result in injury to personnel.
Allow the GC to cool down before disassembling any components.
Always wear proper personal protective equipment (PPE) when disassembling the analyzer.
Tools required
■ 7 ⁄64-in. Allen wrench
■ Phillips screwdriver
■ Flathead screwdriver
Procedure
1. Disconnect all power to the unit. Allow at least 10 minutes for the components to cool-down.
2. Remove the explosion-proof dome and the thermal hood.
Rosemount 700XA 93