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The lifetime of an electron multiplier is directly related to the current that flows through it
and the extent of contamination or condensation that it experiences. Replace the electron
multiplier or replacement horn when voltage is over 2500 volts. To maximize electron
multiplier life:
• Maintain the best possible vacuum, especially in the analyzer manifold.
• Use extreme caution and be conservative with venting, pumpdown, and all vacuum
system procedures to keep pump fluid background to a minimum.
• After venting, allow four hours for pumpdown and thermal equilibration
before scanning.
• Actively look for background contamination and leaks and repair them immediately.
• Don't tune excessively. PFTBA can result in higher background over an extended
period of time.
• Replace the electron multiplier if vacuum is poor or voltage is over 2500 volts.
These are the recommended
replacement multipliers and horns
for the MSD. Other manufacturers'
products may be incompatible with
Agilent instruments and can result
in reduced sensitivity, lifetime, and
noise problems.
Tips & Tools
MSD Electron Multipliers
and Replacement Horn
MSD Electron Multipliers and Replacement Horn
Description 5975 Series 5973 Series 5972/5971 Series
Electron multiplier replacement horn
Use with electron multipliers with
"straight" horns.
05971-80103 05971-80103 05971-80103
Triple axis detector assembly* G3170-80100
Triple axis electron multiplier G3170-80103
EM signal wire, low noise detector G3170-80008
High energy dynode G1099-80001
Electron multiplier 05971-80102
*Include on 5975 TAD systems
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