irTis BenchTop 2K, 4K and 6
Sentry 2.0 Controls
Rev 007, 10/11 13
© SP Scientific 2011
Vacuum Units
System pressure may be displayed in millitorr (mTorr), microbar (μbar) or Pascal
(Pa).The Vacuum Units field displays the units selected for measuring system
pressure.
Relay Test
The Relay Test screen can be used to troubleshoot electrical or mechanical problems,
or to observe active outputs during a freeze-drying run.
Solid State Relay Output Test
SSR1 SSR2
-Vacuum -Purge
-Comp2 -Bath
-Comp1 -Spare
-Defrost -Heat
-SSR1 -SSR2 Menu-Exit
To test a relay bank, simply press the Up or Down (+/-) button and each of the outputs
of the selected relay bank will fire for approximately two seconds each. Relay
positions preceded by a highlighted box indicate the output is active.
Note: Purge and Bath functions are not available on BenchTop units.
Vacuum Pump Maintenance
The Vacuum Pump Maintenance screen is used to adjust vacuum maintenance alarm
parameters and maintenance time durations.
Vacuum Pump Maintenance
Alarm Setpoint: 240
Current Hours: 0000 min: 007
The Alarm Setpoint is the number of hours of continuous operation the vacuum pump
can run before the vacuum pump maintenance alarm will be generated. This can be
used to draw attention to necessary vacuum pump maintenance operations, such as
oil changes. The default factory value is 240 hours, but can be changed by pressing
and holding the MENU button while Alarm Setpoint is highlighted. Once prompted,
use the Up/Down (+/-) buttons to change this value.
The Current Hours field can be reset at any time by pressing and holding the MENU
button while Current Hours is highlighted.
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