Predictive Diagnostics - Teledyne T101 Operation Manual

Teledyne ML - T101 Operation Manual

8.2. PREDICTIVE DIAGNOSTICS

Table 8-2 Predictive Uses for Test Functions
TEST DAS
FUNCTION FUNCTION
H2S STB 1
N/A
PRES SMPPRS
DRK PMT DRKPMT
SO
2
CONC1
Concentration
SAMP FL SMPFLW
LAMP RATIO LAMPR
1
H2S OFFS OFSET1
1
H2S SLOPE SLOPE1
1
Shown as they appear when analyzer is in H
mode, both versions appear.
The analyzer's test functions can be used to predict failures by looking at trends in their
values. The current value of these functions can be viewed via the front panel, recorded
via the DAS system (see Section 4.8) or even downloaded via the internet from a
remote location using Teledyne ML's APICOM control software can be used to
download and review these data (see Section 5.1.2.9).
CONDITION
EXPECTED
≤ 1 ppb with
Zero Gas
C onstant
sample gas
atmospheric
PMT output C onstant
when UV within ±20 of
Lamp shutter check-out
closed
C onstant
At span with
response
IZS option
from day to
installed
Standard stable for
configuration
at span concentration
Standard
Operation
Standard Stable and
near 100%
Operation
During Zero
C al
During Span
C al
S mode. In SO
2
BEHAVIOR
ACTUAL
Increasing
zero air
Fluctuating
Slowly
within
increasing
changes
Slowly
decreasing
Significantly
increasing
value
Decreasing
over time
day
Decreasing
constant
over time
Slowly
Decreasing
Stable
Fluctuating
Fluctuating
or Slowly
increasing
Slowly
decreasing
Slowly
increasing or
Stable
decreasing
Slowly
increasing or
Stable
decreasing
mode appear as SO2 OFFS & SO2 SLOPE. In multigas
2
Instrument Maintenance
INTERPRETATION
• Pneumatic Leaks – instrument &
sample system
• Detector deteriorating
• Developing leak in pneumatic system
• Flow path is clogging up.
• Developing leak in pneumatic system
to vacuum
- C heck critical flow orifice &
sintered filter.
• Replace particulate filter
• PMT cooler failure
• Shutter Failure
• C hange in instrument response
• Degradation of IZS permeation tube
• Drift of instrument response; UV
Lamp output is excessively low;
clean RC EL window
• Flow path is clogging up.
- C heck 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
• Bad PMT
• Failed HVPS
• Leak in sample gas flow
• C ontamination in zero gas source.
• UV lamp aging
• UV detector wearing out
• Leak in Sample gas or calibration gas
flow path
• Deterioration / contamination of
calibration gas source(s)
201