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Getting Started Model T265 Chemiluminescence Ozone Analyzer Addendum to Model T200 Manual
20
STARTUP, FUNCTIONAL CHECKS, AND INITIAL CALIBRATION
3.4.1 Startup
1. Turn on the instrument by pressing the on/off rocker switch on the front
panel. The display should immediately light, showing the computer’s
memory configuration, then the instrument type - Model T265. A diagram
of the software menu trees can be found in Appendix A of this addendum.
2. Thirty minutes after power-up an internal solenoid valve will open
allowing Nitric Oxide gas to flow. Check the Nitric Oxide flow “NO
FLOW” test function (TEST button, <TST TST> buttons) on the front
panel to verify that the flow is 5 cm³/min ± 2. cm³/min.
If the flow is out of this range, check the Nitric Oxide pressure “NO
PRESS” test function on the front panel display, to verify that the
pressure is set to 5 PSIG +/- 1 PSIG.
If the pressure is out of this range, check that the cylinder regulator is
set to 20 PSIG, then drop the front panel and use a flat head screw
driver to turn the NO Pressure Adjustment Stem (Figure 3-3) to adjust
the NO pressure regulator: clockwise to increase; counter-clockwise to
decrease.
Note
The NO pressure sets the flow; therefore, the ‘NO PRESS” test function
is of greater importance when setting up the analyzer. The “NO FLOW”
test function is only provided to indicate the presence of gas flow.
The Model T265 analyzer requires about one hour for all internal
components to heat to operating temperature.
I
MPORTANT IMPACT ON READINGS OR DATA
It is recommended that the analyzer operate for about four (4) hours before
calibration and the collection of reliable readings.
3. When the instrument is warmed up, check the TEST functions. All of the
readings should compare closely with those in Appendix C of this
addendum.
4. After checking the TEST functions, calibrate the instrument as presented
sequentially in Parts 1 through 3 in Section 3.4.2, which follows.
3.4.2 Initial Calibration
The initial calibration is accomplished in three parts:
07337B DCN6324