Specifications

5975 Series MSD Troubleshooting and Maintenance Manual 271
Index
Numerics
19, large peak at m/z, in CI MSD, 75
219 width, 209
32, visible peak at, in CI MSD, 76
A
Abrasively cleaning ion source parts, 138
parts to be cleaned, 135
Abundance
absolute, 40
low for m/z 502, 40
relative, 40
AC board, 220
Adjusting the RF coils, 159
Air leaks
as a source of contamination, 54
finding in CI, 61
small enough to cause no problems in
PCI can destroy NCI sensitivity, 58
visible peak at m/z 32 in CI MSD, 76
Ammonia
ballasting of the foreline pump required
due to, 166
AMU gain, 209
AMU offset, 209
Analyzer, 197 to 214
basic components of, 198
heaters, 213
ion source, 200
maintaining, 131
mass filter, 208
part numbers, 250
parts that should not be disturbed, 132
radiators, 213
Analyzer chamber pressure
too high, 42
too low, 43
Analyzer chamber, turbo pump, 179
Analyzer temperatures
recommended, 213
Autotune
relative abundances of m/z 502
produced by different autotunes, 40
B
Back panel and connectors, 225
Background, high, 38, 54
Baseline, chromatographic
falling, 35
high, 35
rising, 35
wandering, 36
Bleed. See Column bleed or Septum bleed
C
Calibrant
CI calibrant ions not visible, 73
Calibrant vial, CI
refilling, 169
Calibrant vial, CI, refilling
Calibration valve
O-ring, 182
Calibration valve, CI, 192
Calibration valve, EI
reinstalling, 113
Calibration vial, EI
refilling and reinstalling, 112
removing, 109
Carrier gas
contaminated, 54
Chemical ionization
hardware overview, 16
Chemical residue, hazardous, 86
Chromatography, abnormal results, 33
CI calibrant vial
refilling, 169
CI calibration valve, 192
CI filament, 202
CI interface tip seal, 202
installing, 164, 166, 167, 169
CI ion source
repeller, 202
CI maintenance, 163 to 170
CI MSD maintenance, 163
installing the CI interface tip seal, 164,
166, 167, 169
CI spectra
classical, 16
Cleanliness, importance during
maintenance, 131
Column bleed
as a source of contamination, 54
Column nut
leaking, 53
Columns
installing in the GC/MSD
interface, 105, 109, 112, 113, 118,
133, 135, 138, 140, 142, 144, 151,
164, 166, 167, 169, 219
Compression seals, 183
Connectors, 225
foreline pump cord receptacle, 225
high vacuum power (HIV
AC
POWER), 225
high vacuum signal (HIVAC
SIGNAL), 225
power cord receptacle, 225
remote start, 225, 228
Consumables, part numbers of, 260
Contamination, 54
avoiding after cleaning the ion
source, 131
D
DC polarity, 210
Detector, 211
difficulty with the EM supply, 47
electron multiplier horn, 211
electron multiplier voltage, 211
replacing the horn, 151
steadily increasing EM voltage, 212