TSI Instruments ALNOR AIRGARD 200, Руководство пользователя

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8
Calibration
Field calibration must be performed since each hood installation
is unique.
WARNING
Calibration of this instrument should only be performed by
qualified personnel. Proper guidelines for monitoring any
ventilation apparatus are established on the basis of toxicity or
hazards of the materials used, or the operation conducted within
the ventilation apparatus. Personnel calibrating the AirGard
®
200
monitor must be completely aware of the regulations and
guidelines specific to their application.
Equipment
1. Calibrated thermoanemometer (TSI Model 9535, Alnor
AVM430, or equivalent).
2. Small screwdriver with a 1/8" wide flat tip.
Procedure
Step 1: Double check installation to ascertain that the AirGard
®
200 monitor, power supply and any ancillary parts are properly
installed.
Step 2: Allow 20 minutes for the monitor to warm up.
Step 3: Determine the low flow setpoint. This is the value of
where the monitor will first indicate a low flow condition. The red
indicator will be illuminated for this value. Refer to facility’s
Industrial Hygiene Officer for the proper setpoint. For this
example, assume the indicator is to be illuminated when the flow
is 70 fpm.
Step 4: Adjust fume hood air flow to the low flow setpoint (as
described in Step 3). One method to lower the face velocity of
the hood is to close the volume damper (if available) in the
ductwork.