Class1 3041-10X-00-CL1 - Sentry Governor - EXTERNAL - Manual (Page 12)

FORM-ENG-0018 REV A 05-27-03
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Ocala, FL 34475
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TECHNICAL DATA SHEET
PAGE
11 OF 36
DATE 6/19/2014
PRODUCT GROUP THROTTLE CONTROL P/N 3045-101-00-CL1, 3045-102-00-CL1 REV 1.02
PRODUCT SENTRY PRESSURE GOVERNOR BY AMS
4.2.2. Pressure mode
Pressure mode maintains a set pump pressure by monitoring the discharge pressure transducer and modifying the
pump speed by adjusting the engine RPM. The operator can modify the set pump pressure with the control
switches on the SENTRY.
(Proper interlocking is required for normal operation – refer to Required Interlocking section 4.3)
Pressure mode affords the most safety to the operator by not allowing potentially hazardous pressure spikes. The
SENTRY will maintain the set pump pressure even when discharge lines are actively opened and closed as long as
the water supply is sufficient. The SENTRY will automatically increase engine speed when pump pressure has
decreased due to discharge lines being opened. The increase in engine speed will return the pump pressure to the
desired set pressure (and vice-versa when discharge lines are closed).
Press the MODE button to select pressure mode. The
PSI mode indicator LED will illuminate yellow.
It may be necessary to press the MODE switch twice
depending on the configured first mode (see section 6.5.3).
Rotate the Twister knob in the INCREASE direction to
increase or the DECREASE direction to decrease the
pressure set point. The direction of increase can be set to
clockwise or counter-clockwise (see section 6.7.1). The
target pressure will be displayed in the target pressure
display.
Press a PRESET button to set the pump pressure to the
configured preset. The SENTRY will adjust the engine
RPM to maintain the preset pressure value (see section
4.4).
Configure the pressure mode preset through the Setup
Menu (see section 6.4.3 and 6.4.5).
Press the IDLE switch at any time to set the SENTRY back
to standby. Both mode indicator LEDs will turn off when
the engine speed reaches idle (see section 4.5).