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2020PROPlus Overview
Figure 1. The 2020PRO
Plus Instrument
The 2020PRO
Plus measures the concentration of airborne gases and vapors that can
be ionized by a photoionization detector. The 2020PRO
Plus automatically displays
and can record these concentrations. The 2020PRO
Plus does not distinguish
between individual compounds. The reading displayed represents the total
concentration of all photoionizable chemicals present in the sample. The
2020PROPlus is factory-set to display concentration in units of ppm.
The 2020PRO
Plus operates automatically. The 2020PROPlus display updates itself
once per second. You can read concentrations directly from the display.
The 2020PRO
Plus will perform short-term exposure limit (STEL), time-weighted
average (TWA) and PEAK calculations when it is in INTERVAL mode. You can
view any of these results in INTERVAL mode.
The 2020PRO
Plus has two datalogging options, Tag and Interval mode. Tag mode
allows the user to manually tag and store readings during a walkthrough. Interval
mode allows the user to datalog at selectable intervals of 1 second to 999 seconds.
In Interval mode, the STEL, PEAK and TWA are calculated. If you select Interval
mode, these values are automatically recorded in the 2020PRO
Plus’s memory. The
2020PRO
Plus can log up to 12,000 entries.
In Tag mode operation, the 2020PRO
Plus prompts you to locate a site and then to
record a background and sample readings for the site. You can record up to
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