Specifications

5
4.3 Backlight ON/OFF
The LCD can be read in low-light areas by setting the front panel
LIGHT switch to ON. The backlight stays on until turned off, or until
the POWER switch is set to OFF.
4.4 Using the Strap
The instrument’s elastic strap allows the unit to be either hand-held,
or hung on nearby objects.
By sliding your hand between the instrument and its elastic strap, you
can hold onto the Dioxor II with a minimum of effort. The instrument’s
front panel slide switches can then be actuated by your thumb for
one-handed operation. Or, by releasing the metal clip at the bottom
of the instrument’s case, you can hang the instrument by its strap on
nearby objects such as nails, sheet metal, or valve handles.
4.5 Using the Probe
A rigid stainless steel probe with handle is used to draw a gas
sample from the room, boilers, and other combustible furnaces
through a line dryer and flexible hose into the instrument. A flexible
probe option (see Section 6) is also available.
The probe tube is detachable from the handle when sampling with a
different probe is desired. See Figure 3.
Important! The line-dryer will remove moisture from the gas
sample. If the line-dryer becomes saturated, however, condensation
may be observed within the hose. If this occurs, stop sampling and
replace the line-dryer’s filter-packing material.
4.6 Interpreting the Display
Gas Display
The LCD shows SO
2
levels in the range from 0 to
1999 ppm. The display on the right indicates an
SO
2
level of 25 ppm.