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3.3 Installation guidelines
3.4 Mechanical installation
3.4.1 Installing the particle counter
Important Note: Stop the vacuum pump and put a cover on the sample inlet connection
before a cleaning or disinfecting cycle is started.
Refer to the following general guidelines during installation.
•
If the room is washed down at regular intervals, install the counter outside of the room.
Only the intake and vacuum tubes will go into the clean room. As an alternative, put
the particle counter in the clean room in a sealed box. Connect all tubes and cables to
the particle counter through the box.
•
Put the vacuum pump in a central location. There must be sufficient vacuum for all
particle counters in the network.
•
Make sure that the temperature in the installation area is not more than the specified
temperature for the particle counter (refer to
temperature decreases the life of the electronic components and laser.
•
Keep the distance between the particle counter and the sampling point to a minimum.
Make sure that the distance is not more than 3 m (10 ft).
•
Make sure that the tubing does not bend and restrict the air flow (refer to
on page
14).
•
Follow the
Sampling guidelines on page 17
Vacuum system guidelines
Important Note: Put the vacuum pump in a central location. There must be sufficient
vacuum for all particle counters in the network.
•
Capacity—a minimum vacuum capacity of 16 inches Hg (542 mbar) is necessary at
each particle counter. The vacuum is necessary to control the flow rate at each
particle counter.
•
Distribution manifold—use a distribution manifold that will keep the vacuum loss to a
minimum. Typical materials used for vacuum distribution include brazed copper pipe,
schedule 80 PVC pipe or tubing such as Cobolite
•
Distribution valves—use short tubing lengths to supply the vacuum from the
distribution manifold to the individual particle counters. Use a valve and a barb fitting
of the correct dimension at each location.
•
Minimize piping loss—all junctions, elbows and the tubing length increase the vacuum
loss in a system. The loss increases as the distance from the vacuum source to the
counters and the number of junctions and elbows increase.
Install the particle counter on a level surface or on a wall with one of these kits:
•
DIN rail kit (included with counter)—use to quickly remove the counter from the wall.
•
Terminal box kit (optional)—use to quickly disconnect the vacuum line and wires (refer
to
Parts and accessories on page
•
Wall plate (optional)—use for permanent installation (refer to
on page
47. The instructions are supplied with the kit.)
DIN rail installation
The DIN rail kit lets the user quickly attach and remove the counter from the wall.
Specifications on page
to prevent sampling errors.
®
.
47. The instructions are supplied with the kit.)
Installation
3). A high
section 3.4.2
Parts and accessories
13
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