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LCD
Abbreviation for liquid crystal display. Isaac’s display is a LCD device that provides setup prompts, menu
options, test results, and other system information.
Leak Rate
A pressure drop over time can be stated as a leak rate. For example
—
0.1 mbar per second is a leak
rate. A leak rate can also be stated in flow units such as 4 cc/minute.
Leak Test
See
Pressure Decay Test, Flow Test
.
Link Programs, how to
In the
Program Screen
select the
Next Prog:
field, press the
Clear
button and enter the
program number you want to link. Press
Enter
. If no link is desired set this field to the same program number.
Linked Programs
Two or more programs can be linked (consecutively connected) to perform multiple actions
during a single test cycle. For example, a flow program can be set to follow a pressure decay program so that
when the operator presses the START switch, Isaac runs through a flow test then goes to a pressure test. If
product goes out of parameter at any point in either test, the fail light turns on and the test ends.
Main Digital Screen
This readout shows the pressure and flow values during pressure decay flow and burst
testing. The way the main digital screen functions, varies with each testing mode.
Measurement Units
See
Units of Measure
.
Menu
A menu is a list of setup or programming options. See also
Setup Screen
.
Modes
Isaac has multiple operating modes: (e.g. pressure decay, flow, and burst) Isaac shows the current mode
in the test type box on Isaac’s
Main
screen.
Operator
The person who connects products to Isaac, presses the
START
button, and monitors the system while
under test. For the purposes of t
his guide, the operator is separate from the user. Users typically handle Isaac’s
setup and programming.
Pass Light
Isaac’s green indicator with check mark. The pass light turns on after the tester completes a test that
remains within established parameters.
Pilot Air
Certain applications require the use of pneumatics that is pilot actuated. A steady air supply is required to
assist in the operation of these valves.
Zaxis’ proprietary air valve requires 85
-100psi to function correctly.
Program Screen
This screen is used to enter all setpoints and limits concerning pressure decay, flow, and burst
test. Different modes require varying setup information. The program screen changes depending on the type (or
mode) of test being programmed. The program screen has a header that tells you the program number for which
you are currently setting parameters.
Pressure Decay Test
Pressure decay testing is used to test products for leaks by trapping pressure inside and
then measuring pressure loss. The abbreviation
PD
is often used in this guide to refer to pressure decay.
Pressure Tolerance,
The plus or minus allowable change in the test pressure. If the pressure fails to achieve this
amount during the Fill step a “LO Pressure” error will report. If the pressure exce
eds this mark during the Fill step a
