TSI Incorporated 8372, Operation And Service Manual

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13
Chapter 2
Operations in More Detail
This chapter explains how to change fabrics and assemble different hood
sizes and presents more detail on the various features of the A
CCU
B
ALANCE
Plus.
Keypad Functions
ON/OFF
Press to toggle between having the instrument on and off.
The power
ON/OFF
key is located on the meter keypad of the A
CCU
B
ALANCE
Plus. To turn the power on, momentarily press the
ON/OFF
key. The
A
CCU
B
ALANCE
Plus will immediately light all display digits and sound the
buzzer. After a second, the approximate percent of remaining battery life
will be displayed. If fresh, new alkaline batteries are used, the value will be
near 100-percent. Other batteries, such as NiCd batteries, may show a lower
value even when they are fully charged.
Notice : The percent power remaining will not be accurate for NiCd
batteries because they do not discharge linearly with power use.
SUPPLY/RETURN
Press to toggle between measuring supply flow and return flow. The arrows
on the display will indicate the direction of the flow (
“
↑
”
for return,
“
↓
”
for
supply). This key does not appear on Model 8373 as automatic detection of
flow direction is a feature.
K FACTOR
Volume measurements with the A
CCU
B
ALANCE
Plus is a means to take
readings more quickly than methods used in the past. However, all capture
hood devices are affected by various types of diffusers, means of connecting
the diffuser to the duct work, and the type of duct work. The
A
CCU
B
ALANCE
Plus is calibrated connected to a 2 foot x 2 foot, 4-way-
throw diffuser. In some circumstances, it is necessary to traverse the
ductwork to determine the “true” flow value. This true value is then
compared to the A
CCU
B
ALANCE
Plus. This comparison is a K Factor or
correction factor. The A
CCU
B
ALANCE
Plus has the ability to store 5
different K Factors.
Press the
K FACTOR
key to toggle the K factor on or off. The
“K
f
”
symbol is
shown on the display when a K factor is being used in the calculation. Press