F-940 Instruction Manual rev. 3-8-2017
1554 NE 3
rd
Ave, Camas, WA 98607, USA
46
Phone: (360) 833-8835
[email protected]
www.felixinstruments.com
PolarCept
It is recommended to use the external PolarCept filter when
measuring a mixture of gas
(such as when sampling fruit)
or interfering gases may be
reported by the instrument.
The PolarCept filter is
recommended for Trigger
Mode. PolarCept should only
be used with
1.5 mL of
distilled or deionized water.
The PolarCept filter consists
of a plastic molded housing,
hydrophobic filter and O-ring. It is attached to the sample probe
in place of the hydrophobic filter and utilizes the same sample
probe needle at the end. A small plastic syringe is used to fill
and empty the PolarCept filter. Once the hydrophobic filter and
O-ring are in place it should be very difficult to remove it and
create a leak-proof seal. Additional hydrophobic filters are
included as replacements, when the filter is soaked with water
or damaged during removal, replace the filter.
After measuring, the water in the PolarCept filter will become
saturated with trapped interfering gases and should be replaced
with fresh distilled water. Saturation rates will depend on the
amount of interfering gases present in the sample environment.
The table below shows example saturation times when
measuring headspace of bananas (with a maturity index of 5) in
Continuous Mode. This sample contains various mixed
hydrocarbons, ethylene and VOCs.
