Fpd Leak Testing (Gc With Electronic Flow Sensor) - HP 5890 Series II Plus Reference Manual

Preventive Maintenance
Flame photometric detector
6. Use compressed gas, air, or N
and/or detector module body.
7. Inspect and clean deposits from the jet bore and from the threads
using a suitable wire. If the jet is damaged in any way, it should be
replaced. It is good practice to replace the jet rather than cleaning it,
particularly when extremely high sensitivity is required.
8. A new Kalrez O•ringseal (Part No. 0905•1 103) must be used when
reinstalling the jet into the burner chamber.
9. Reassemble all parts of the detector module; reassemble the module
onto the instrument. A new Vespel ferrule (6.4 mm id, Part No.
0100•1061)should be used to seal the detector module to the transfer
line.
Be careful not to crush or side load the fused silica liner when
Caution
reinstalling the detector.
WARNING Whenever working with exposed fused silica tubing, wear eye
protection; fragments of fused silica could be released if the fused silica
is fractured or crushed.
10. Reinstall the PMT assembly on the detector module; restore
instrument gases and power.

FPD leak testing (GC with electronic flow sensor)

If the system has an electronic flow sensor (EFS) with any FPD gas
plumbed through it (air, oxygen, hydrogen, or carrier), the system can be
checked easily and quickly. First, close all supply gases except for the one
plumbed through the EFS. Then cap off the detector exhaust tube with a
1/4•inchSwagelok plug (Part No. 0100•0196)and a 40% graphitized
Vespel ferrule (Part No. 0100•1061).
With the flow system deadheaded and one pressurized gas plumbed
through the EFS, the flow reading should drop very close to zero. If not,
198
to blow out loose particles from the jet
2