Agilent Technologies 5975C TAD VL MSD Troubleshooting And Maintenance Manual page 272

Index
Detector focus lens, 211
Diffusion pump
effect of low fluid level in,
error messages related to,
Diffusion pump fluid
as a source of contamination,
Drawout plate and cylinder,
Drying cleaned ion source parts,
Dummy filament, 202
E
EI/CI GC/MSD interface. See CI interface
Electronics, 215 to 229
ac board, 220
ac-dc board. See low voltage power
supply
danger to from electrostatic
discharge, 87, 157
high voltage (HED) power supply,
LAN/MS control card, 223
locations of major components,
low voltage power supply,
main board, 219
maintaining, 157
part numbers, 233
power supplies, 224
signal amplifier board, 220
status display, 217
toroid transformer, 224
Electrostatic discharge
danger to the electronics from, 87,
precautions to take against, 132,
EM
See also Detector
See Electron multiplier
EM voltage, 212
Emission current, 204
if there is none, 52
End plate O-rings, 182
Entrance lens, 207
Error messages
difficulty in mass filter electronics,
difficulty with the EM supply,
difficulty with the fan, 47
difficulty with the HED supply,
difficulty with the high vacuum
pump, 48
272
foreline pressure has exceeded 300
mTorr,
42 internal MS communication fault,
48 latched,
lens supply fault,
54 log amplifier ADC error,
206 no peaks found,
131 temperature control disabled,
temperature control fault,
the high vacuum pump is not ready,
the system is in standby,
the system is in vent state,
there is no emission current,
there is not enough signal to begin
tune,
translating error numbers into
messages,
ESD. See Electrostatic discharge
Excessive noise or low signal-to-noise ratio
in CI MSD,
224 Exhaust
oil trap for foreline pump,
217
224
F
Face seals,
Fan, for high vacuum pump,
incorrect operation of,
replacing,
Filaments,
care,
electron energy,
157 emission current,
157 parameters affecting,
reinstalling,
selection,
Foreline pressure
exceeding 300 mTorr,
too high,
too low,
Foreline pump,
effect of low oil level,
failure to turn on,
47 incorrect operation,
47 minimizing damage from ammonia
reagent gas,
48 power cord receptacle,
turned off during pumpdown,
venting the exhaust,
49
49
47
49
49
49
50
50
51
51
52
52
47
74
175
182
191
47
114
204
205
204
204
204
144
204
49
42
43
175
42
32
32
166
225
32
86
5975 Series MSD Troubleshooting and Maintenance Manual
See also Foreline pump oil
Foreline pump oil
draining, 98
refilling the pump with,
replace every 6 months,
Foreline pump power cord receptacle,
Foreline trap. See Oil trap
Front panel. See Status Display
Fuses
51 on the back panel,
replacing the primary fuses,
G
Gas purifier, methane/isobutane
replacing, 167
Gauge controller
abnormal or blank display,
indicated vs. actual pressure,
power indicator does not light,
GC
components responsible for air
leaks, 53
does not turn on,
sources of contamination in,
GC interface. See GC/MSD interface
GC/MSD interface
failure to heat up,
maintaining, 153
reinstalling a heater and sensor,
removing the heater and sensor,
Grounded wrist strap,
H
Half-splitting, to find air leaks in CI
MSD, 62
Heaters
GC/MSD interface, reinstalling,
GC/MSD interface, removing,
ion source, reinstalling,
ion source, removing,
mass filter, reinstalling,
mass filter, removing,
HED, 211
difficulty with the HED power
supply, 48
HED feedthrough
seal, 183
100
84
225
225
161
43
195
44
31
54
46
156
154
87
156
154
147
145
149
148