Specifications

5975 Series MSD Troubleshooting and Maintenance Manual 273
Index
HED power supply, 224
High electron multiplier voltage in CI
MSD, 79
High energy dynode. See HED
High vacuum gauge
installing, 117
removing, 116
High vacuum pump
difficulty with, 48
not ready, 51
High voltage feedthrough. See HED
feedthrough
Horn, electron multiplier, 211
I
Indicated pressure, 195
Interface socket
reinstalling, 140
removing, 133
Interface tip seal, CI
installing, 164, 166, 167, 169
Interfacing to external devices, 228
start run input, 229
system ready signal, 228
Ion focus, 206
Ion source, 200
body, 200
cleaning, 133, 135
drawout plate and cylinder, 206
drying cleaned parts, 138
entrance lens, 207
filament care, 205
filament, reinstalling, 144
filaments, 204
heater, 213
heater and sensor, reinstalling, 147
heater and sensor, removing, 145
ion focus lens, 206
magnet, 206
parts that should not be cleaned, 135
reassembling, 135, 138, 140, 142
removing, 118
repeller, 206
Ion source, CI. See CI ion source
K
KF seals, 182
L
LAN (I/O) connector, 226
LAN/MS control card, 223
interfacing to external devices, 228
RAM on, 223
remote control processor, 228
Line voltage
symptoms of incorrect or missing, 31,
43
Local Control panel, 13
Log amplifier. See Signal amplifier
Low sensitivity
at high masses, 41
general, 37
Low signal-to-noise ratio in CI MSD, 74
Low voltage (ac-dc) power supply, 224
Lubricating
side plate O-ring, 118
M
m/z, 208
m/z 14 and 16, symptoms of a large air
leak, 39
m/z 18, 28, 32, and 44, symptoms of an air
leak, 39
m/z 502, low or decreasing abundance
of, 40
Maintenance, 83 to 162
analyzer, 131
avoiding dangerous voltages during, 85
calibration vial, removing, 109
CI calibrant vial refilling, 169
CI gas purifier replacing, 167
CI interface tip seal installing, 164,
166, 167, 169
CI ion source cleaning, 164
CI MSD, 163
cleaning reagent gas supply
tubing, 168
dangerous voltages, 85
dangerously hot parts, 86
EI calibration valve, refilling, 113
EI calibration vial, refilling, 112
EI calibration vial, reinstalling, 112
electron multiplier horn, replacing, 151
electronics, 157
fan, high vacuum pump, replacing, 114
filament, reinstalling, 144
foreline pump in CI, 166
foreline pump oil, draining, 98
foreline pump, refilling, 100
GC/MSD interface, 153
GC/MSD interface heater and sensor,
reinstalling, 156
GC/MSD interface heater and sensor,
removing, 154
ion source heater and sensor
,
reinstalling, 147
ion source heater and sensor,
removing, 145
ion source, reassembling, 135, 138,
140, 142
ion source, removing, 118
mass filter (quadrupole), 210
mass filter heater and sensor,
reinstalling, 149
mass filter heater and sensor,
removing, 148
methane/isobutane gas purifier, 167
micro-ion vacuum gauge,
reinstalling, 117
micro-ion vacuum gauge,
removing, 116
primary fuses, replacing, 161
reconnecting the MSD to the GC, 105
refilling the CI calibrant vial, 169
RF coils, adjusting, 159
safety during, 85
schedule, 84
separating the MSD from the GC, 101
side plate O-ring, lubricating, 118
Malfunctions. See Symptoms of
malfunctions
Mass assignments, incorrect, 39
Mass filter
219 width, 209
amu gain, 209
amu offset, 209
dc polarity, 210
dc voltage, 208
difficulty with the mass filter
electronics, 47
heater, 213
heater and sensor, reinstalling, 149
heater and sensor
, removing, 148
maintenance, 210