2.Getting Started
4
2.2 Zero Check
If the internal optical system is dirty, you may not be able to perform an accurate
measurement.
To confirm the cleanliness of the internal optical system, perform a Zero Check
before measuring.
Remove the rubber cap that is mounted on the inlet on the upper
side of the main unit.
Next, attach the zero filter to the inlet using the supplied Tygon
tube.
The length of the tube is not critical. However, make sure that the
tube is not bent. (Approx. 60cm)
Follow the above procedure in order to prevent particles
from entering the instrument.
Perform a measurement for one minute and then perform a
Zero Check.
(Refer to
3.4 MONITOR
for the operation procedure.)
Perform a Zero Check at least once a day.
It is recommended a Zero Check be done before and after each measurement.
2.3 Isokinetic Suction Probe
Use the Isokinetic Suction Probe to ensure the sampling air
velocity is equivalent to the operating environment air velocity.
This allows you to perform a measurement without significantly
disturbing the normal air flow.
Attach the Isokinetic Suction Probe to the standard inlet by
using the provided Tygon tube.
When using the Tygon tube, cut the tube to the most
suitable length for your measurement requirements.
