TSI Instruments AccuBalance 8370, Operation And Service Manual

Page: 34 / 58

26 Chapter 2
Switching On the Power
The power
ON/OFF
switch is located on the meter keypad of the
A
CCU
B
ALANCE
. To turn the power on, momentarily press the
ON/OFF
switch. The A
CCU
B
ALANCE
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.
While the battery life is being displayed, the A
CCU
B
ALANCE
will
automatically perform a series of self tests. If an error is detected, the
display will show an error number. Refer to
Troubleshooting in Chapter
4 for interpretation of the error message.
If no errors are detected during start-up, the A
CCU
B
ALANCE
will
proceed to one of its two operating modes: continuous reading mode
or averaging mode. As long as the batteries have not been removed or
the DIP switch settings have not been changed, the A
CCU
B
ALANCE
will
return to the mode it was in when it was last used.
Selecting Flow Direction
The A
CCU
B
ALANCE
is designed to accurately measure air flow in either
direction through the hood. For highest performance accuracy, every
A
CCU
B
ALANCE
is calibrated with flow in each direction separately.
Therefore, it is very important that you select the flow direction using
the
RETURN/SUPPLY
switch on the keypad before you make a
measurement. The arrow in the upper right hand area of the display
will change direction each time you press the
RETURN/SUPPLY
switch