Predicting Diagnostics; Table 5-2. Predictive Uses For Dashboard Functions - Teledyne T400 User Manual

5.2

PREDICTING DIAGNOSTICS

These 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 functions to the values
recorded on the printed record of the Final Test and Validation Data Sheet for your
instrument. Table 5-2 can be used as a basis for taking action as these values change with
time. The Data Logger (internal data acquisition system or DAS) is a convenient way to
record and track these changes (Section 2.5.1). Use NumaView™ Remote to download
and review this data from a remote location.

Table 5-2. Predictive Uses for Dashboard Functions

FUNCTION CONDITION
STABILITY
Zero Cal
O3 REF Sample
O3 DRIVE
PRESSURE
Sample
SAMPLE
Sample
FLOW
OFFSET Zero Cal
SLOPE Span Cal
100
BEHAVIOR
Increasing
Decreasing
CalS Increasing
Increasing > 1"
Decreasing > 1"
Decreasing
Increasing
Decreasing
Increasing
Decreasing
Teledyne API – Model T400 O
INTERPRETATION
• Pneumatic leaks – instrument & sample system
• Malfunctioning UV lamp (Bench)
• Lamp Aging
• Mercury contamination
• Aging IZS UV lamp (only if reference detector
option is installed)
• Pneumatic Leak between sample inlet and optical
bench
• Dirty particulate filter
• Pneumatic obstruction between sample inlet and
optical bench
• Obstruction in sampling manifold
• Pump diaphragm deteriorating
• Sample flow orifice plugged/obstructed
• Pneumatic obstruction between sample inlet and
optical bench
• Obstruction in sampling manifold
• Obstructed/leaking Meas/Ref Valve
• Pneumatic leaks – instrument & sample system
• Contaminated zero calibration gas
• Obstructed Meas/Ref Valve
• Pneumatic leaks – instrument & sample system
• Pneumatics becoming contaminated/dirty
• Dirty particulate filter
• Pneumatic leaks – instrument & sample system
• Contaminated calibration gas
Analyzer
3
083730400A DCN8130