Table of Contents
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L
LEDs. See Status Display
Line voltage
hazards of ungrounded outlet, 32
symptoms of incorrect or missing, 68, 80
Log amplifier. See Signal amplifier
Low sensitivity
at high masses, 78
general, 74
Low voltage (ac-dc) power supply, 243
Lubricating
side plate O-ring, 140
vent valve O-ring, 142
M
m/z, 223
m/z 14 and 16, symptoms of a large air leak, 75
m/z 18, 28, 32, and 44, symptoms of an air leak, 75
m/z 502, low or decreasing abundance of, 77
Main board, 238
Maintenance, 93 – ??
analyzer, 144
avoiding dangerous voltages during, 97
calibration valve, refilling, 132
calibration valve, removing, 130
calibration vial, refilling, 124
calibration vial, reinstalling, 124
calibration vial, removing, 122
dangerous voltages, 97
dangerously hot parts, 98
diffusion pump fluid, checking, 110
diffusion pump fluid, replacing, 116
diffusion pump, reinstalling, 118
diffusion pump, removing, 114
electron multiplier horn, replacing, 170
electronics, 177
fan, replacing, 134
filament, reinstalling, 160
filament, removing, 158
foreline gauge, reinstalling, 128
foreline gauge, removing, 126
foreline pump oil, checking and adding, 102
foreline pump oil, draining, 104
foreline pump, refilling, 106
GC/MSD interface, 172
GC/MSD interface heater and sensor, reinstall-
ing, 175
GC/MSD interface heater and sensor, remov-
ing, 173
ion source heater and sensor, reinstalling, 164
ion source heater and sensor, removing, 162
ion source, cleaning, 150
ion source, disassembling, 148
ion source, reassembling, 154
ion source, reinstalling, 156
ion source, removing, 146
mass filter (quadrupole), 226
mass filter heater and sensor, reinstalling, 168
mass filter heater and sensor, removing, 166
primary fuses, replacing, 181
reconnecting the MSD to the GC, 120
RF coils, adjusting, 179
safety during, 97 – 100
schedule, 94
separating the MSD from the GC, 112
side plate O-ring, lubricating, 140
supplies for, 96
tools for, 95, 277
triode gauge tube, reinstalling, 138
triode gauge tube, removing, 136
vacuum manifold, closing, 56
vacuum manifold, opening, 54
vacuum system, 101
vent valve O-ring, lubricating, 142
Index
287
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