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SECTION 3
Calibration
Overview
IMPORTANT:
Calibration procedures are for a constant volume
hood. If you have a VAV hood, call TSI for the calibration procedure
.
The fume hood monitor must be calibrated before first use and checked
annually thereafter. The calibration is stored in the non-volatile
memory of the instrument and is not lost when the monitor loses
power.
Fume hoods vary in design and performance. Because each hood
installation and its air flow patterns is unique, this monitor must be
calibrated in the field on the fume hood in which it is installed.
DANGER:
Calibration and configuration of this monitor must 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 this monitor must be completely aware of the
regulations and guidelines specific to its application.
If you need a reference on performing traverses on fume hoods, please
consult ANSI/ASHRAE 110-1995
Method of Testing Performance of
Laboratory Fume Hoods
, section 6.2 Face Velocity Measurements.
Tools Required
1. Calibrated thermo-anemometer. Suggested instruments include the
Model 9870 or Model 8570.
2. Small pointed tool to press the recessed Up and Down buttons. A
straightened paper clip works well.
Procedure
1. Ensure that the monitor is properly installed. The flexible air hose
should be attached securely to both the fume hood side wall and
the back of the monitor.
2. The power supply plug should be firmly in the power jack on the
back of the monitor and the power supply should be plugged into
