Scheduled Maintenance - Agilent Technologies VS Series Operation Manual

VS Series Helium Mass Spectrometer Leak Detectors
For simplicity, the maintenance functions in this section are grouped by recommended
frequency, as shown in Table 4-1, based on assumed daily use.
Calibration check
Replace the internal calibrated leak
Replace diaphragm on DP pump (Dry
scroll pump models only)
Replace tip seals on IDP-3 pump
(PD03 only)
Maintenance functions that may be required on a demand basis, such as changing a
filament after filament failure, are listed in Table 4-2.
Function
Spectrometer cleaning
Filament replacement
Tuning adjustments
Mechanical pump fluid change
Table 4-1 Scheduled Maintenance
Description
Table 4-2 As-Required Maintenance
The spectrometer is designed to operate for years without
maintenance, however actual performance depends on the
leak detector operational environment. Spectrometer
cleaning restores optimum performance if the unit shows
significant sensitivity loss or high background signal.
Sensitivity loss appears as a high gain value after a
calibration or failure to calibrate with a gain too high error
message.
Filaments are designed to operate for several years with no
maintenance. When a filament burns out, the system
automatically switches to the other filament and notifies
you to recalibrate. The calibration notice also serves to
inform you of a filament failure. Agilent recommends that
the burned out filament be replaced at a convenient time so
that a spare is always available during leak test operations
to prevent unplanned system down time.
If calibration is not successful or if the system is calibrated
to an external leak, tuning can maximize the helium signal.
Persistent, high helium background signal. Fluid
contamination (dirty brown color indicates burnt or
contaminated fluid, milky white consistency indicates high
water vapor content in fluid).
Daily 12 Months
X
X
X
Most Common Symptom
24 Months
X
4-3