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PortaSens II
Gas Detector
C16 Leak Detector
O & M Manual
Rev. G, 11/07
- 9 -
SAMPLE INLET OPTIONS
The
PortaSens II
is shipped with a quick disconnect inlet fitting connected to the sample
inlet port. A flexible extension wand is supplied in the kit for use in probing around mechanical
equipment to determine the source of a gas leak or for pulling sample from a confined area
without entering the area. The extension wand plugs into the quick disconnect fitting on the flow
manifold at the back of the detector. Please note that the extension wand is lined with Teflon,
which is inert to most gases and vapors.
It is possible to use flexible tubing on the inlet to extend the sample point even further
than the wand. If this is done, it is important to use a non-reactive plastic. Fluorocarbon based
tubing has proven to be the best and is the only alternative for many reactive gases when trying
to measure low concentrations. Other materials may be used for high range measurements
where accuracy is not a major concern, or where the user is only looking for major leakage
sources.
No matter what material is used for inlet extensions, the internal walls must be kept dry.
Water on the walls of the inlet tubing can absorb reactive gases due to solubility. If the inside of
the tubing gets wet, simply allow the unit to pump non-condensing ambient air for 10 or 15
minutes to dry it out.
An outlet tube fitting is also supplied on the flow manifold. Ordinarily, allowing the small
amount of sampled gas to vent at the back of the unit will do no harm. However, if sampling for
high concentrations of gas, or if the instrument is being used in an enclosed space, you may wish
to connect a longer vent line to the outlet so that sampled gas can be vented to a safe location.
DISPLAY RESOLUTION
Model C16 detectors display gas concentration with a resolution that depends upon the
range of the unit. Full scale ranges of 0-4.99 or below will provide resolution of 0.01. Ranges
from 0-5.0 up to 0-49.9 will provide resolution of 0.1. Full scale ranges above 50 will have a
resolution of 1.