Predictive Diagnostics; Table 5-2. Predictive Uses For Dashboard Functions - Teledyne T200 User Manual

PREDICTIVE DIAGNOSTICS

Predictive diagnostic functions, including failure warnings and alarms built into the
analyzer's firmware, aid in determining whether and when repairs are necessary.
Dashboard Functions can also be used to predict failures by looking at how their values
change over time, compared to the values recorded on the printed record of the Final Test
and Validation Data Sheet. The internal data logger is a convenient way to record and track
these changes (set up through the Data Logger, Section 2.5.1). Use NumaView™ Remote
to download and review this data from a remote location.
The following table, checked weekly, can be used as a basis for taking action as these
values change with time.

Table 5-2. Predictive Uses for Dashboard Functions

FUNCTION EXPECTED
Constant to
Rx Cell Press
within ± 0.5 in-
(pressure)
Hg-A
Constant within
Sample Press
atmospheric
(pressure)
changes
Constant to
O3 Flow
within ± 15
Constant within
Auto Zero
±20 of check-
out value
Constant for
NO2 Conc
constant
(Concentration)
concentrations
NO2 Conc
Constant
with IZS Option
response from
installed
day to day
(Concentration)
Constant for
NO Conc
constant
(Concentration)
concentration
108 Teledyne API T200 NO/NO
ACTUAL
Fluctuating Developing leak in pneumatic system. Check for leaks.
Pump performance is degrading. Rebuild pump when pressure is
Slowly increasing
above 10 in-Hg-A.
Fluctuating Developing leak in pneumatic system. Check for leaks.
Slowly increasing Flow path is clogging up. Replace orifice filters.
Developing leak in pneumatic system to vacuum (developing valve
Slowly decreasing
failure). Check for leaks.
Slowly decreasing Flow path is clogging up. Replace orifice filters.
Developing AUTO ZERO valve failure. Replace valve.
PMT cooler failure. Check cooler, circuit, and power supplies.
Significantly increasing
Developing light leak.
O air filter cartridge is exhausted. Change chemical.
3
Slowly decreasing signal Converter efficiency may be degrading. Clean or replace converter
for same concentration components.
Change in instrument response. Low level (hardware): calibrate the
sensor.
Decreasing over time
Degradation of IZS permeation tube. Change permeation tube.
Heavily fluctuating day Ambient changes in moisture are affecting the performance. Add a
to day dryer to the zero air inlet..
Drift of instrument response; clean RCEL window. Check for flow
Decreasing over time
leaks or irregularities.
/NO Analyzer with NumaView™ Software
2 x
INTERPRETATION & ACTION
083730200A DCN7962