TSI Incorporated 8372, Operation And Service Manual

Page: 24 / 55

14 Chapter 2
and hold the
K FACTOR
key to change the current K factor. When the
“K
f
”
symbol appears and a number, 1 through 5, appears on the small display,
release the key (the A
CCU
B
ALANCE
Plus can store 5 different K factors). To
change the K factor value on the large display, press the
▲
or
▼
key. To
move to other K factors, press the
K FACTOR
key. Press
ENTER
at any time
to accept the value and to return to measuring mode. The range of K factors
allowed will be 0.1 to 2.00. The default value is 1.00 (using no K factor is
equivalent to using a K factor equal to 1.00).
There are five K factor values stored in the A
CCU
B
ALANCE
Plus. The last K
factor used will appear when the
K FACTOR
key is next pressed.
ACTUAL/STANDARD
Press to toggle between displaying actual
∗
and standard flow rate.
“STD”
or
“ACTUAL”
will light up on the display (standard is the default). Press and
hold to view the barometric pressure and ambient pressure. For Model
8372, press and hold to adjust the barometric pressure and ambient
temperature values. When the key is pressed and held, the barometric
pressure entered will be displayed. Press the
▲
or
▼
key to change the
value and
ENTER
to accept it. The ambient temperature will then be
displayed. Press the
▲
or
▼
key to change the value and
ENTER
to accept it
and return to measuring mode. Ambient temperature and barometric
pressure can also be set by pressing either the
▲
or
▼
key when the
parameter is displayed during power-up.
The Model 8373 automatically senses the barometric pressure and ambient
temperature. These values cannot be changed. The values may be adjusted
to match other calibration devices. To enter an adjustment, see the
Field
Calibration section later in this chapter.
TIME CONSTANT
Press to display the current time constant. Press
▲
or
▼
to scroll through the
time constant choices, which are 1 s, 3 s, 5 s, 10 s, 15 s, 20 s. Press
ENTER
to accept choice and return to measuring mode. The default value is 1 s.
When the
SAMPLE
key is pressed the instrument counts for one second and
then displays the average value of 1 second. If the time constant is set to 5
seconds, the word
SAMPLE
will flash for 5 seconds. The instrument will
then display the average value of the 5 seconds.
The flow sensor in the A
CCU
B
ALANCE
Plus is extremely fast and actually
samples flow at a rate of about 5 times per second. Thus, the values
displayed in the 1 second interval represents an integration of 5 readings
∗
Actual flow Standard flow *
Actual temperature
Barometric Pressure
*
Standard Pressure
Standard Temperature
=
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