Thermo Scientific SOLA II Flare User Manual page 100

Thermo Scientific
Malfunction Possible Cause
Purge Fail alarm Loss of instrument air pressure
displayed 1
Improper settings
Leakage at oven or electronic
enclosure doors
Leakage throughout electrical
conduit
Excessive signal Internal sample or carrier
noise leakage
Defective or low sensitivity PMT
No 4–20 mA dc
Incorrect or damaged wiring
output current
Inaccurate 4–20 mA Incorrect or damaged wiring
dc output current
Unstable span Flasher lamp
Internal instrument leak
Lamp trigger pack
Low lamp intensity Flasher lamp
Determine the alarm type by accessing the View/Ack Alarm menu.
1
2 Fault on the I/O PCB.
Maintenance & Troubleshooting
Action
Check instrument air source pressure.
Ensure oven air and purge pressures are set
properly.
Ensure oven and electronics enclosure
doors are closed tightly and that door seals
are in good condition.
Ensure electrical conduit seals are poured.
Check instrument for leaks.
Check electronics and replace if necessary.
Check wiring diagrams to ensure 4–20 mA
2
dc signal connected to proper terminals
with correct polarity. Check for short or
open in wiring.
Check wiring diagrams to ensure 4–20 mA
2
dc signal connected to proper terminals
with correct polarity. Check for short or
open in wiring.
Replace with known good lamp to see if
problem is resolved.
Check for leaks.
Replace.
Ensure lamp and trigger pack are securely
fastened.
SOLA II Flare User Manual
Chapter 8
8-20