Table of Contents
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P
Part numbers, inside front cover
See also Parts
Parts, 253 – ??
analyzer, 268
consumables, 276
diffusion pump vacuum system, 264
electronic, 256
external cables, 257
ferrules, 278
foreline pump, 262
GC/MSD interface, 274
if you cannot find a part you need, 255
ion source, 270
maintenance supplies, 95, 276, 277
miscellaneous, 279
ordering, 254
O-rings and O-ring assemblies, 260
printed circuit boards, 258
rebuilt assemblies, 254
samples, 279
seals, 260
turbomolecular pump vacuum system, 266
vacuum system, 260
Peak widths, inconsistent, 76
Peaks
at m/z 18, 28, 32, and 44 or at m/z 14 and 16, 75
flat tops, 72
fronting, 71
inconsistent widths, 76
missing, 70, 86
precursors, 76
split tops, 72
tailing, 71
PFTBA (perfluorotributylamine), 204
Polarity (dc), of the mass filter, 225
Power cord
ac, 246
foreline pump, 246
receptacle, 246
Power status LED, 250
Power supplies
high voltage (HED), 243
low voltage (ac-dc), 243
Power switch, 250
Pre-operation checklist, 32
Pressure
foreline pressure too high, 79
foreline pressure too low, 80
indicated vs. absolute, 44
monitoring, 33
monitoring foreline, 36
monitoring vacuum manifold, 44
symptoms indicating malfunctions, 79
typical vacuum manifold pressure for various
carrier gas flows, 45, 196, 198
vacuum manifold pressure too high, 79
vacuum manifold pressure too low, 80
Pressure gauge
See Foreline gauge
See Triode gauge tube
Printed circuit boards, part numbers, 258
Pumpdown
ChemStation control of, 32
procedure, 58
waiting for thermal equilibrium after, 59
Index
289
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