Model 422 & Model 422CC Instruction Manual
D01187869
Revision A, December 2015
28
6.2
Pressure Control
Pressure is automatically controlled by programming a pressure ramp into the
software. To create a new pressure profile either select that button or just above
select the graph with the blue pressure line. The program pressure screen is shown
below. Enter desired set point values by touching the SET POINT parameter box
and entering the values on the keypad. Time to set point is selected by touching the
TIME parameter box and entering a time in minutes on the touch pad. The final
segment should always be a SOAK segment where the pressure equals the final test
pressure and the time equals SOAK. This guarantees the instrument will maintain
final temperature for the remainder of a test. After a profile has been entered, press
the SAVE button. At this point a graph of the desired temperature ramp is
displayed for confirmation. Press accept or cancel to return to the programming
screens. An example of confirmation is shown below:
6.3
Hesitation Squeeze (Squeeze Schedule)
On units equipped with the hesitation squeeze option it may be accessed using the
button labeled Hesitation Squeeze. Pressing this button will bring up the screen
shown below.
