Sentry Sample Sentry II Low Pressure - Continued Setup; Continued Setup Options; Pressures; Pressure Setpoints

18 Sentry Equipment Corp
Continued Setup
Figure 12. Continued Setup
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Star tupPressure
PRVSet tings
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Figure 12 shows the continued setup screen. The cursor indicates the option you wish to
choose. Move the cursor using the ▲ and ▼ keys. Select the option using the ENTER key.
To exit this screen and return to the setup screen, press the ESC key.
Pressures
Figure 13. Startup Pressure
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Figure 13 shows the pressures screen. To adjust the set-point, use the ▲ and ▼ keys.
Holding the MENU key while using the ▲ and ▼ keys changes the set-point in increments
of 100. When nished changing the displayed set point, press the ENTER key to display the
next set point. After setting the last pressure, pressing ENTER returns the unit to the setup
screen. The following pressures can be programmed:
Startup: The rst set point displayed is the startup pressure. This inlet pressure set point is
used to determine when Sample Sentry II should startup.
Shutdown: This pressure setting is used to determine when the system should shut down.
When the pressure is less than this set point, the system shuts down. To disable automatic
shutdown on low pressure, reduce the shutdown pressure until it reads “Disabled.”
 NOTE
Ensure that there is sucient pressure dierential between the startup pressure set point and
shutdown pressure setpoint so that the Sample Sentry II does not enter a continuous loop
senario. (ie. Startup pressure must always be sueciently higher than Shutdown pressure to
account for pressure drops during startups. )