Models 947, 948 and 960 Leak Detectors Operations and Service Manual
3-5
REJECT SET POINTS
The REJECT SET POINTS are used to alert the operator that
a measured leak rate has exceeded the set value. There are
four set points available. Each set point must be enabled
before they are operational. Conversely, each must be
disabled to stop its operation. Only one set point can be
active at any given time.
AUDIO VOLUME
The AUDIO VOLUME control is used to activate the audio
tone from the turret. The audio tone frequency increases as
the size of the measured leak increases. The audio volume
control is located on the turret.
BAR GRAPH DISPLAY
The 50-segment bar graph display on the front control
panel represents the mantissa value of the leak rate,
spanning from 0 to 10. The scale shows above the bar
graph. The numerical display, located to the far right of the
bar graph, displays the leak rate exponent value in atm
cc/sec.
LINEAR VS LOG OUTPUT
Configure the analog output voltage to the optional I/O port
on the back of the unit. The options for output are linear or
logarithmic at 2 VDC per decade or 3 VDC per decade.
