Predictive Diagnostics - Teledyne T100 Instruction Manual

Teledyne ML – T100 UV Fluorescence SO2 Analyzer

8.2. PREDICTIVE DIAGNOSTICS

DAS
TEST FUNCTION
FUNCTION
PRES SMPPRS
DRK PMT DRKPMT
SO
2
CONC1
Concentration
SAMP FL SMPFLW
LAMP RATIO LAMPR
The analyzer's test functions can be used to predict failures by looking at trends in their
values (refer to Table 8-2) and by comparing them values recorded for them at the
factory and recorded on the T100 Final Test and Validation Data Form (Teledyne ML
P/N 04551) that was shipped with your analyzer.
A convenient way to record and track changes to these parameters is the internal data
acquisition system (DAS). Also, APICOM control software can be used to download
and record these data for review even from remote locations (refer to Section 5.3.2.8
describes APICOM).
Table 8-2: Predictive Uses for Test Functions
CONDITION
EXPECTED
Constant within
sample gas atmospheric
PMT output Constant within
when UV Lamp ±20 of check-
shutter closed
At span with
IZS option response from
installed
Standard
configuration at
span concentration
Standard
Operation
Standard Stable and near
Operation
BEHAVIOR
ACTUAL
Fluctuating
Slowly
increasing
changes
Slowly
decreasing
Significantly
increasing
out value
Constant
Decreasing
over time
day to day
stable for
Decreasing
constant
over time
Slowly
Decreasing
Stable
Fluctuating
Fluctuating or
Slowly
increasing
100%
Slowly
decreasing
Instrument Maintenance
INTERPRETATION
 Developing leak in pneumatic system
 Flow path is clogging up.
- Check critical flow orifice & sintered filter.
- Replace particulate filter
 Developing leak in pneumatic system to
vacuum (developing valve failure)
 PMT cooler failure
 Shutter Failure
 Change in instrument response
 Degradation of IZS permeation tube
 Drift of instrument response; UV Lamp
output is excessively low.
 Flow path is clogging up.
- Check critical flow orifice & sintered filter.
- Replace particulate filter
 Leak in gas flow path.
 UV detector wearing out
 UV source Filter developing pin holes
 UV detector wearing out
 Opaque oxides building up on UV source
Filter
 UV lamp aging
213