User Manual

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If you are charging the battery pack in the instrument you can use all the features of
the 2020ComboPRO while the battery pack is being charged.
Leaving the AC adapter connected to the 2020ComboPRO will not harm the battery
or the AC adapter in any way. If the 2020ComboPRO is to be left unused for an
extended period of time, leave it connected to the AC adapter so that the battery will
be fully charged and ready for operation.
On average a fully charged battery pack will provide 6 hours of continuous
operation. Battery life is shorter if the instrument is turned off and then on again
repeatedly, or if the backlighting is turned on.
Display
The 2020ComboPRO has a graphic display for reporting detected concentration and
to guide you through configuration options. All functions of the 2020ComboPRO
will be reported on the display.
Graphic Display
The 2020ComboPRO uses an 8 line graphic display. The display will always be used
for reporting detected concentration. In order to accommodate the range of
concentrations the 2020ComboPRO can detect, the meter reading will be reported
using one of two resolutions. A resolution of 0.1 ppm will be used for concentrations
below 100 ppm, and a resolution of 1 ppm will be used for concentrations between
100 ppm and 10,000 ppm.
Figure 5. The 2020ComboPRO Display
The display reports instantaneous concentration at all times when the pump is on. In
Interval mode, the display will report instantaneous concentrations as well as PEAK,
STEL or TWA.
The 2020ComboPRO is designed for ease of use with a logically organized internal
menu structure/user interface.