Thermo Scientific SOLA II Flare User Manual page 47

Thermo Scientific
If an injection valve begins leaking due to damage or wear, excess sample begins
flowing to the pyrolyzer. This extra load of sample in the pyrolyzer exceeds the
ability to fully combust the materials in the sample. When these incompletely
combusted materials enter the PUVF optical bench, they absorb UV light.
The PUVF includes a system to monitor and compensate for decreases in the
UV light output as the bulb ages. However, in the case of injection valve
failure, the PUVF system begins rapidly increasing the UV lamp output in an
effort to compensate for the absorption of UV by incompletely combusted
sample products. The user can enter the rate of change that triggers this alarm.
The programmable range is from 1 to 50 V/30 seconds. If the analyzer detects
the programmed rate of change in UV lamp voltage, it triggers the Injection
Valve Failure alarm to protect the system by stopping the sample injection and
reducing the stabilization time for the PUVF bench on system restart.
Note This alarm can also be triggered by an electronics failure causing improper
flashing of the lamp. ▲
When the Injection Valve Failure or Chamber Flow alarm activates, the SOLA
II Flare stops air flow to the sampling system pneumatic valves. This prevents
excess sample and incomplete combustion products from further contaminating
the system. This happens under the following conditions:

Injection failure alarm

Instrument power loss

Instrument air loss
 Analysis suspension
SOLA II Flare User Manual
Chapter 4
Operation
4-3