下載次數：141次 瀏覽次數：549次發布時間：2015-11-17 15:14About this Manual
This manual explains how to set up, operate and maintain the
AccuBalance? Air Capture Hood Model 8371. Read it thoroughly before
using the instrument.
Formatting and Typography
Note that step-by-step instructions are numbered in boldface type: 1, 2,
3, etc., set flush-left against the margin.
References to the front panel keys on the AccuBalance?
capture hood,
along with the instrument's displayed readout, are represented in this
manual by the typeface called Helvetica Narrow. In addition to the different
typeface, displayed messages appear in quotes.
When reference is made to other sections of the manual, the section title
is italicized.
Example: The "SAMPLE" message appears along with a flow value after
the SAMPLE button has been activated (from Display in Chapter 1).
The TSI Model 8371 AccuBalance? capture hood is an instrument
designed to measure the air flow from diffusers and grilles or the air flow
entering exhaust outlets. The AccuBalance? capture hood is lightweight
and easy to use. The instrument can display the measured air flow in
four different units: standard cubic feet per minute (SCFM), standard
liters per second (Std l/s), standard cubic meters per hour (Std m3/hr),
and standard cubic meters per minute (Std m3/min). All readings may
also be displayed in actual flow conditions.
The AccuBalance? capture hood consists of a fabric hood, a molded
plastic base which contains an electronic meter, and a flow sensing
manifold located within the base. Air flowing through the hood is
measured by a hot-film sensor located in the central hub of the flow
sensing manifold. The twenty-four pairs of flow sensing ports in the
manifold are strategically located so that the AccuBalance? capture hood
provides the highest degree of measurement accuracy, even in nonuniform
flow conditions.
The AccuBalance? capture hood is temperature-compensated to display
a standard flow rate: SCFM, Std l/s, Std m3/hr, and Std m3/min.
Standard flow rate is defined as the volumetric flow rate at standard
conditions of 70°F (21.1°C) and 14.7 pounds per square inch (760
mmHg) barometric pressure. Standard flow rate is the measurement
used most often in ventilation applications.
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