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HygroPort I.S. User's Manual
4
OPERATION
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4.1
Preparation for Operation
Before operation it is recommended that the user become familiar with Section 2 of
this Manual in which all the equipment controls and indicators, the elements of the
display and the overall menu structure are described.
Prior to making a measurement, the instrument must be connected to a sample
gas stream as described in Section 3.5.
It is also recommended that the battery be charged before conducting any tests
(refer to Section 3.7).
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The instrument will also have been set up with a number of factory default parameters.
These default parameters are shown in Table 4.1, together with a reference to the
relevant part of Section 2, which details the method of changing these default values.
4.2
General Operational Information
The instrument is designed to operate in a flowing gas stream of between 0.4 and 1.0
scfh (0.2 and 0.5 Nl/min) and at system pressures ranging from atmospheric up to
5000 psi (350 bar). Section 3.5 describes typical methods of connecting the instrument
to a sample gas stream.
For all applications, the sample gas is taken into the instrument via the Gas In
port, located on the top of the instrument, from where it passes through the internal
sensor and out via the Gas Out port. Gas flow rate (if monitored) is normally
measured externally, on the output side of the instrument.
The sample gas f l low rate is not controlled or measured within the instrument. It
must be controlled outside the instrument, typically by means of either fixed orifice
fittings, or a needle valve. Kahn Instruments provides an optional range of accessories,
specifically designed for use with the HygroPort I.S.
Issue 6, December 2019
High pressure gases are potentially dangerous.
Please see the warning in Section 3.5.1
Do not allow the battery to fully discharge. Doing
so may result in difficulty recharging again.
30
Kahn Instruments
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