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Preparing Your Laboratory
62
Local electrical codes do not allow PerkinElmer Service Engineers to install the
Note
blower and vent assembly.
Additional recommendations on the venting system include:
•
Make sure the duct casing is installed using fireproof construction. Route ducts
away from sprinkler heads.
•
Locate the blower as close to the discharge outlet as possible. All joints on the
discharge side should be airtight, especially if toxic vapors are being carried.
•
Equip the outlet end of the system with a back draft damper and take the
necessary precautions to keep the exhaust outlet away from open windows or
inlet vents and to extend it above the roof of the building for proper dispersal
of the exhaust.
•
Equip the exhaust end of the system with an exhaust stack to improve the
overall efficiency of the system.
•
Make sure the length of the duct that enters into the blower is a straight length,
at least ten times the duct diameter. An elbow entrance into the blower inlet
causes a loss in efficiency.
•
Provide make-up air in the same quantity as is exhausted by the system. An
"airtight" lab will cause an efficiency loss in the exhaust system.
•
Ensure that the system is drawing properly by releasing smoke into the mouth
of the vent. A synthetic "smoke" can be generated by placing open bottles of
hydrochloric acid and ammonium hydroxide in the proximity of the vent
opening.
•
Equip the blower with a pilot light located near the instrument to indicate to the
operator when the blower is on.
Vent Positions
The venting system for the ICP torch connects directly to the torch compartment
chimney located on top of the sample compartment. 4-inch inner diameter tubing
is provided with the Avio 500 ICP-OES for making this connection. For proper
instrument venting, order PerkinElmer Venting Kit (Part No. N0790188, 110V;
N0790189, 230V).
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Troubleshooting
