For conducting these tests, Thermo recommends testing equipment of the
manufacturers listed below.
Inflow Velocity – DIM Method (Primary)
Description: Inflow velocity using the direct inflow measurement
method (DIM).
Equipment: . . .Shortridge ADM-870, or equivalent
. . . . . . . . .Flow hood Series 8400, or equivalent
Method:
1. Move the front window to the work position (25.4 cm/10 in).
2. Attach the flow hood [1] in the work opening [2] and seal the
remaining open areas.
3. Operate the system blowers for approx 20 min.
4. Record at least 5 measurements of the inflow air volume.
5. Average those readings and calculate the inflow velocity (V1) as
described below.
1500 Series A2 8-3
Thermo Scientific
Section 8
Certification Testing
Test Equipment
Testing equipment
Manufacturer
Application
Smoke tubes
MSA
Pittsburgh, Pennsylvania, 15230
Airflow pattern test
Thermoanemometer
TSI
Shoreview, Minnesota 55126
Downflow velocity test and alternate method for inflow
velocity using constricted access
Digital Safety Inspector
Ohmic Instruments Co.
Easton, Maryland 21601
Electrical leakage and ground resistance tests
GFI Circuit Tester
Leviton Manufacturing
Little Neck, New York, 11362
Electrical leakage, ground resistance, and polarity tests
Photometer
Air Techniques
Owing Mills, Maryland, 21117
Filter leak test
Aerosol Generator
Air Techniques
Owing Mills, Maryland, 21117
Generation of aerosol mist
Vibration Meter
Quest Technologies
Oconomowoc, Wisconsin, 53066
Vibration test
Flow Hood Air Data Multimeter
Shortridge Instruments. Inc.
Scottsdale, Arizona, 85260
Inflow velocity test
Testing Information