Sample And Ozone Dryer Replacement; Pmt Sensor Hardware Calibration - Teledyne 200E Instruction Manual

Model 200E Instruction Manual
• Turn off the analyzer power, remove the power cord and the analyzer cover.
• Disconnect the 1/8" black tube from the white ozone scrubber cartridge and the ¼"
clear tube from the plastic extension tube at the brass fitting nearest to the ozone
generator. Unplug the electrical connection on the rear side of the brick.
• Unscrew the two mounting screws that attach the ozone generator to the chassis
and take out the entire assembly.
• If you received a complete replacement generator with circuit board and mounting
bracket attached, simply reverse the above steps to replace the current generator.
Make sure to carry out a leak check and a recalibration after the analyzer warmed up
for about 30 minutes.

11.6.4. Sample and Ozone Dryer Replacement

The M200E standard configuration is equipped with a dryer for the ozone supply air. An
optional dryer is available for the sample stream and a combined dryer for both gas
streams can also be purchased. To change one or all of these options:
• Turn off power to the analyzer and pump, remove the power cord and the analyzer
cover. Locate the dryers in the center of the instrument, between sensor and NO
converter. They are mounted to a bracket, which can be taken out when unscrewing
the two mounting screws (if necessary).
• Disconnect all tubing that extends out of the dryer assembly, those are usually the
purge tube connecting to the vacuum manifold, the tube from the exit to the ozone
flow meter (ozone dryer) or to the NO/NO
ozone flow meter and the NO/NO
any of the white plastic fittings on the dryer, which connect the inner drying tube to
the outer purge tube. See Section 9.3.2 and Figure 9-2.
• Note the orientation of the dryer on the bracket. Cut the tie wraps that hold the
dryer to the mounting bracket and take out the old dryer. If necessary, unscrew the
two mounting screws on the bracket and take out the entire assembly.
• Attach the replacement dryer to the mounting bracket in the same orientation as the
old dryer. Fix the dryer to the bracket using new tie wraps. Cut off excess length of
the wraps.
• Put the assembly back into the chassis and tighten the mounting screws.
• Re-attach the tubes to vacuum manifold, flow meter and/or NO/NO
least two wrenches and take extra care not to twist the dryer's white plastic fittings,
as this will result in large leaks that are difficult to trouble-shoot and fix.
• Carry out a detailed leak check (Section 11.5.2), close the analyzer, power up pump
and analyzer and re-calibrate the instrument after it stabilizes

11.6.5. PMT Sensor Hardware Calibration

The sensor module hardware calibration is used in the factory to adjust the slope and offset
of the PMT output and to optimize the signal output and HVPS. If the instrument's slope and
offset values are outside of the acceptable range and all other more obvious causes for this
problem have been eliminated, the hardware calibration can be used to adjust the sensor as
has been done in the factory. This procedure is also recommended after replacing the PMT
or the preamplifier board.
044100102 Rev A
valve (sample dryer) or two tubes to the
x
valve (combo-dryer). Take extra care not to twist
X
Troubleshooting & Repair
valve using at
x
2
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