PerkinElmer Photovac 2020, Manual

Page: 81 / 190

Detailed Operation
79
2. Select the desired Cal Memory (1 to 15) with the
“Next” and “Prev” keys.
3. Press “Set”, “Cal” and “Mem” and “Chng” to change
the parameters of the Cal Memory. Select “User” or
“Lib”.
4. If you selected “User”, enter the name, response factor
and alarm levels.
5. If you entered “Lib”, use the “Next” and “Prev” keys to
select the required library. See page 174 for a list of
Library entries.
6. Calibrate 2020 with zero air and 100 ppm isobutylene as
described in
Calibration Using the Flow-Match
Regulator on page 70.
7. Expose 2020 to the sample. The displayed reading is the
approximate concentration of the specific compound.
The response factors on page 169 serve only as a guide to
concentrations measured by 2020.
Results are expected to be accurate to /-10 ppm or +/-25%
of the displayed result, whichever is greater. Accuracy of response
factors to other gases and vapors may differ from those listed on
page 169.
Manual Operation
As part of manual operation, you setup 2020 to monitor various
locations. Since each location may contain different compounds and
concentration ranges you can program a Cal Memory and the
associated response factor and alarm level for up to 15 different
applications. In this way you can sample numerous locations without
having to re-calibrate 2020 at each location.
Prepare a monitoring schedule for you application. Your schedule
should contain a list of sites that must be monitored and the Cal