Predicting Failures Using The Test Functions; Table 9-2: Predictive Uses For Test Functions - Teledyne 400E Instruction Manual

Model 400E Ozone Analyzer
Instruction Manual

9.2. Predicting Failures Using the Test Functions

The Test Functions can be used to predict failures by looking at how their values
change over time. Initially it may be useful to compare the state of these Test
Functions to the values recorded on the printed record of the final calibration
performed on your instrument at the factory, P/N 04314. Table 9-2 can be used as
a basis for taking action as these values change with time. The internal data
acquisition system (iDAS) is a convenient way to record and track these changes.
Use APIcom to download and review this data from a remote location.
Function
Stability
O3 Ref
O3 Drive
Pres
Samp Fl
Slope
Offset
P/N 04316 Rev: B

Table 9-2: Predictive Uses for Test Functions

Mode
Zero Cal
Sample
CALS
Sample
Sample
Span Cal
Zero Cal
MAINTENANCE SCHEDULE & PROCEDURES
Behavior
§ Pneumatic leaks – instrument &
Increasing
§ Malfunctioning UV lamp (Bench)
Decreasing § UV lamp ageing
§ Mercury contamination
§ Ageing IZS UV lamp (only if
Increasing
§ Pneumatic Leak between sample
Increasing > 1"
§ Dirty particulate filter
§ Pneumatic obstruction between
Decreasing > 1"
§ Obstruction in sampling manifold
§ Pump diaphragm deteriorating
§ Sample flow orifice
Decreasing
§ Pneumatic obstruction between
§ Obstruction in sampling manifold
§ Pneumatics becoming
Increasing § Dirty particulate filter
§ Pneumatic leaks – instrument &
§ Contaminated calibration gas
Decreasing
§ Obstructed/leaking Meas/Ref Valve
Increasing
§ Pneumatic leaks – instrument &
§ Contaminated zero calibration gas
§ Obstructed Meas/Ref Valve
Decreasing
§ Pneumatic leaks – instrument &
Interpretation
sample system
reference detector option is
installed)
inlet and optical bench
sample inlet and optical bench
plugged/obstructed
sample inlet and optical bench
contaminated/dirty
sample system
sample system
sample system
207