Radioactivity Leak Test (Wipe Test); Thermal Conductivity Detector (Tcd); Cleaning - HP 5890 Series II Plus Reference Manual

Preventive Maintenance

Thermal conductivity detector (TCD)

Radioactivity leak test (wipe test)

ECDs must be tested for radioactive leakage at least every six months.
Records of tests and results must be maintained for possible inspection by
the Nuclear Regulatory Commission and/or responsible state agency.
More frequent tests may be conducted when necessary.
The procedure used is the wipe test. A wipe test kit (Part No.
18713•60050)is supplied with each new ECD. Its contents are listed in
Table 8•2:
Table 8-2. HP 5890 Radioactivity Leak Test (Wipe Test) Kit
Item
1
2
3
4
5
6
Thermal conductivity detector (TCD)

Cleaning

Cleaning by bake•out of the detector is performed only after verification
that carrier supply gas and flow system components, are leak•and
contaminant•free.
1. Turn off the detector!
2. Remove the column from the detector; cap the detector column fitting.
192
Description
Envelope
Envelope
Information Card
Filter Paper, Circular
Service Note
Plastic Bag
( or
DET A B
Part No.
05750-80036
05890-90920
18713-90040
3150-0429
5950-3586
9222-0308
)
OFF
Qty
4
4
12
12
1
12