Electrical Installation - Hach MET ONE 6000P Manuel D'utilisation

N O T I C E
Do not use this instrument to monitor air that contains vapors with corrosives.
These vapor will quickly cause permanent damage to the optics or electronics of
the counter.
• Laminar flow—Install at least one sample probe for every 2.3 m
2
(25 ft ) of surface area.
• 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 3 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 2.
Table 2 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
problems that follow:
• 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.
• A decrease in the exhaust flow will put a load on the vacuum pump.
Premature pump wear and failure may occur. To prevent pump failure,
the pump temporarily turns off for 30 seconds plus the length of one
sample when a flow alarm occurs.
Items to collect:
• Air inlet tubing—Hytrel
2
• Exhaust tubing (optional)—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).
2. Put a cover on the tube ends to make sure that unwanted material
does not go in the tubes during installation.
3. 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.
4. 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.
5. Optional: Connect exhaust tubing to the exhaust fitting.

Electrical installation

Wiring safety information
Electrocution hazard. Make sure that there is easy access to the local
power disconnect.
Always disconnect power to the instrument before electrical connections are
made.
Obey all safety statements while connections are made to the
instrument.
® ®
Bevaline, Tygon or equivalent
W A R N I N G
N O T I C E
English 9