Raven Envizio Pro, Инструкция по установке и эксплуатации

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Chapter 7
118 Envizio Pro™ and Envizio Pro II® Installation and Operation Manual
Dual Flow (%) Percent
When controlling a dual bed system in Gran 3 mode, the Dual Flow Percent feature may be set up on the
Alarm Settings screen. Set the dual flow percent alarm for the tolerance between belt encoder readings before
the field computer will display an alarm condition. This alarm may be used to indicate that the belts are
traveling at different rates or one belt is not moving. The out of tolerance condition must be met for at least 5
seconds before the alarm is displayed.
Enter a value of 100 to disable the dual flow percent alarm or 0 to display an error any time the belt encoders
do not match. The default value for the dual flow percent alarm is 50.
Low Pressure
The Low Pressure setting is only displayed on the Alarm Settings screen when a pressure transducer is
connected to the system and detected by the field computer.
Enter the minimum desired pressure in PSI [kPa] for product at the pressure transducer location. If the product
pressure falls below the programmed, the field computer will display an alert.
Note:
The product control valve will stop closing when the Low Pressure setting is reached.
Low Tank or Bin
Enter the tank or bin volume at which alarms area will activate indicating that a product is running low.
Low Limit
The Low Limit value sets the minimum volume per minute which a product will be applied. If the flow meter
drops below this setting, the field computer will display an alert.
Note:
The product control valve will stop closing when the Low Limit setting is reached.
Low Supply Alarm
Note:
The low supply alarm value will only be available if the control channel is configured for AccuFlow
HP+ system control. Refer to Application Type section on page 100 for additional assistance with
the application type settings.
The low supply alarm value configures the minimum acceptable pressure in PSI [kPa] of the anhydrous
ammonia within the cooler. If the pressure falls below the entered value, the system will display an alert. Set
the low supply pressure between 0 to 50 PSI [0 to 345 kPa]. Enter a value of zero to disable the low supply
alarm.