Predictive Diagnostics; Maintenance Procedures; Changing The Sample Particulate Filter - Teledyne T200H User Manual

Teledyne API - Model T200H/T200M Operation Manual

6.2. PREDICTIVE DIAGNOSTICS

FUNCTION EXPECTED
RCEL Constant to
pressure within ± 0.5
Constant within
SAMPLE
atmospheric
pressure
changes
Constant to
Ozone Flow
within ± 15
Constant within
AZERO ±20 of check-out
value
Constant for
NO2 CONC constant
concentrations
Constant for
NO CONC constant
concentration

6.3. MAINTENANCE PROCEDURES

6.3.1. CHANGING THE SAMPLE PARTICULATE FILTER

07270D DCN7141
The analyzer's test functions can be used to predict failures by looking at trends in their
values. Initially it may be useful to compare the state of these test functions to the
values measured on your instrument at the factory and recorded on the T200H/M Final
Test and Validation Data Form (Teledyne API part number 04490, attached to the
manual). Table 6-2 can be used as a basis for taking action as these values change with
time. The internal data acquisition system (DAS) is a convenient way to record and
track these changes. APICOM control software can be used to download and review
these data even from remote locations (Section 4.15.2.8 describes APICOM).
Table 6-2: Predictive Uses for Test Functions
ACTUAL
Fluctuating
Slowly increasing
Fluctuating
Slowly decreasing
Slowly increasing
Slowly decreasing
Significantly
increasing
Slowly decreasing
signal for same
concentration
Decreasing over time
The following procedures need to be performed regularly as part of the standard
maintenance of the Model T200H/M. Refer to Figure 3-5 for component locations.
The particulate filter should be inspected often for signs of plugging or excess dirt. It
should be replaced according to the service interval in Table 6-1 even without obvious
signs of dirt. Filters with 1 µm pore size can clog up while retaining a clean look. We
recommend using gloves and tweezers to handle the filter and the wetted surfaces of the
filter housing. We recommend not using bare hands to touch any part of the housing,
INTERPRETATION & ACTION
Developing leak in pneumatic system. Check for leaks
Pump performance is degrading. Replace pump head
when pressure is above 10 in-Hg-A
Developing leak in pneumatic system. Check for leaks
Flow path is clogging up. Replace orifice filters
Developing leak in pneumatic system to vacuum
(developing valve failure). Check for leaks
Flow path is clogging up. Replace orifice filters
Developing AZERO valve failure. Replace valve
PMT cooler failure. Check cooler, circuit, and power
supplies
Developing light leak. Leak check.
O air filter cartridge is exhausted. Change chemical
3
Converter efficiency may be degrading. Replace
converter.
Drift of instrument response; clean RCEL window,
change O air filter chemical.
3
Instrument Maintenance
205