horiba SF-1U, Инструкция по эксплуатации

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E-8
6.1.5. Piping
①
Connect the tube to the measurement gas inlet.
VP-1U
〜
3U
：
Outer diameter 6 mm hose connector (For soft tube of inner diameter 5-6 mm)
VP-4U
：
Outer diameter 10 mm hose connector (For soft tube of inner diameter 9-10 mm)
②
Connect the tube to the measurement gas outlet.
Outer diameter 10 mm hose connector (For soft tube of inner diameter 9-10 mm)
WARNING
DO NOT LET REACTIVE GAS FLOW.
Do not let reactive gas that react with water or oxygen. This equipment
doesn’t have a perfect gas sealing. Besides, it uses liquid for filming. Letting
reactive gas flow may cause damage or injury through fire or explosion.
LEAD GAS TO SAFE PLACE.
Make an exhaust line to a safe place. Otherwise an explosion or other
hazards may happen.
NOTE

While the measurement gas should go through heat exchange process
with the measurement ambient temperature. The difference between the
measurement gas temperature and the measurement ambient temperature
adversely affects the film creation and measurement accuracy.

The measuring gas has to be saturated with vapor when the intended flow
rate is over 3L/min. The dry gas causes not only drying the volume tube,
but an inaccurate result.

Stop the gas flow when you don’t measure. Otherwise, the inside of the
measuring tube may be contaminated.
REF .

The tube should be as short as possible. This is to reduce the gas volumetric
changes due to minute changes in the temperature.

If you exhaust the measuring gas by drafting, be careful for the pressure of
measurement gas not to drop.

When measuring a minute amount of flow rate, use a reducer or a similar device
so that the tube diameter can be as small as possible.(For the gas inlet only)

A more correct result can be obtained if the measuring gas is humidified enough
before the measuring unit.
③
Put a piece of film removal paper, about 2 cm from the tip, in its port. This is to
reduce measurement time. (For VP-1U,2U only)
※
The film removal paper should be made by twisting a piece of paper with water
absorptivity. Its diameter should be 1 to 2 mm.
NOTE

Do not put film removal paper over 2 cm. Otherwise, it blocks the passage
of the gas, and causes an inaccurate result.

Replace film removal paper often. The passage may be tight when the
paper expands and this causes an inaccurate result.

Be sure to use the rubber cap whenever measuring flow rates.