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• Turbulent flow—Install at least two sample probes in each clean room.
• Make sure that the sample (isokinetic) probe points to the direction of
flow. Refer to
Figure 2
on page 7.
• Keep the sample probe a minimum of 30 cm (12 in.) from loose
materials, dust, liquids and sprays.
• Keep the sample probe a minimum of 30 cm (12 in.) from potential
contamination sources such as an instrument exhaust fan.
• Do not use this instrument to monitor air that contains the substances
shown in
Table
4.
Table 4 Contaminants
Substance Damage
Powders
Contaminates the sensor and causes incorrect results or
instrument failure
Liquids
Contaminates the internal optics of the sensor and changes the
calibration of the instrument
Note: Liquids can be in the air in the form of oil droplets.
Smoke
Contaminates the sensor
Install the tubing
Use tubing hooks or cable ties to hold the tubing and prevent a bend in
the tubing. A bend in the tubing will decrease the air flow and cause the
problem that follows:
• A decrease in air inlet flow can cause particles to collect on the interior
walls of the tubing. The particles will not be counted. The collected
particles can release at random, which will cause spikes in the count
level.
Items to collect:
®
• Air inlet tubing—Hytrel
Bevaline, Tygon
• Vacuum tubing—Hytrel Bevaline, Tygon or equivalent
• Tubing hooks or cable ties
1. Cut the air inlet tubing to a length sufficient to connect the instrument
to the sample probe. Keep the tube length to a minimum. Make sure
that the length is not more than 3 m (10 ft).
®
or equivalent
2. Cut the vacuum tubing to connect the counter to the vacuum source.
Keep the tube length to a minimum.
3. Put a cover on the tube ends to make sure that unwanted material
does not go in the tubes during installation.
4. Attach the tubing with hooks or cable ties at intervals that are not
more than 1.2 m (4 ft) apart. Make sure that the tubing has a
minimum bend radius of 10 cm (4 in.) so air flow is not decreased.
5. Connect the air inlet tubing to the air inlet fitting on the instrument.
Connect the other end of the tubing to the supplied sample probe.
6. Connect the vacuum tubing to the fitting on the bottom (or side) of
the counter. Do not connect the other end to the vacuum until the
room is ready for sampling.
Electrical installation
Wiring safety information
W A R N I N G
Electrocution hazard. Make sure that there is easy access to the local
power disconnect.
N O T I C E
Always disconnect power to the instrument before electrical connections are
made.
Obey all safety statements while connections are made to the
instrument.
Connect to power
Connect an external power source (24 VDC) to the 5-pin or 10-pin
connector. Refer to
Figure 7
and
wiring information. Make sure that the output voltage of the external
power source does not exceed 28 VDC.
The maximum number of instruments that can connect to one external
power source can change with the communication option. Contact
technical support for more information.
Refer to the illustrated steps in
Figure 9
to the illustrated steps in
Figure 10
Table 5
or
Figure 8
and
Table 6
for 5-pin connector wiring. Refer
for 10-pin connector wiring.
English 11
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