LANDTEC GEM5000 Operating Manual page 45

Gas analyzer

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GEM5000 Gas Analyzer

For example:

Pipe ID

If you do not have any suitable monitoring points you will need to drill (tap of ¾" BSP pipe

thread) a hole in the piping of between 25mm and 30mm in diameter to seat the conical

fitting on the anemometer (which is roughly between 20mm to 34mm). When not in use

the hole can be re-sealed with a ¾" BSP male bung.

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Note:

When the anemometer is not in use the conical fitting should be placed over

the probe to protect it.

The anemometer must fit centrally (the conical fitting must be set on the probe to half the

pipe ID before insertion). The arrow on the tip of the probe must point in the direction of

the gas flow.



Note:

Use the thumb screw to help align the direction of the probe into the gas

stream.

Flow readings are most accurate when there is laminar flow (not turbulent). Turbulence

can be caused by a change in pipe direction or restriction. Ideally, upstream you want at

least 20 times the pipe ID along the length of the pipe without restriction or bend.

Downstream, you want at least five times the pipe ID along the length of the pipe i.e. for a

100mm ID you need 2000mm of clear pipe upstream, 500mm downstream.

Example to show anemometer fitting into the sample point:

Direction of the arrow must be in the same direction as the flow

Pipe OD

Wall Thickness

Anemometer

Thumb Screw

Head

Conical Fitting

Pipe

Pipe Centre Line

Flow Direction

OMGEM5KN4.7.1

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