Diff. Modes; Pressure Integral; Pressure Deadband; Menu Four - Teledyne SyriXus 65x Installation And Operation Manual

3.6.4 Diff. Modes

3.6.5 Pressure Integral

3.6.6 Pressure Deadband

3.7 Menu Four

3.7.1 Modbus Options

EAR99 Technology Subject to Restrictions Contained on the Cover Page
SyriXus Series Pumps Installation and Operation Guide
This feature allows the use of other analog inputs for pressure input to
the pump. The standard pressure transducer MUST be connected to
pump in order for this feature to work.
• Press '1', OFF, to turn OFF this feature.
• Press '2', 0 to 50 ANLG1, to use a 5 volt 50 psi transducer on
ANALOG INPUT 1 of the ACCESSORY connector.
• Press '3', Custom ANLG1, to use 5 volt custom pressure trans-
ducer on ANALOG INPUT 1 of the ACCESSORY connector.
• Press '4', 500 ANLG2, to use a 5 volt 500 psi pressure transducer
on ANALOG INPUT 2 of the ACCESSORY connector.
• Press '5', 5000 ANLG3, to use a 5 volt 5000 psi transducer on
ANALOG INPUT 3 of the ACCESSORY connector.
The pressure control algorithm can be adjusted by turning OFF the
integral compensation. This may be desirable at very low flow rates or
during static tests. Under these conditions pressure control may be
more stable with integral compensation OFF. If the pressure integral
compensation is OFF, there will be a pressure error proportional to the
delivery flow rate. For this reason, the pressure integral is normally
turned ON except for very low flow rates.
This feature is ON by default. Press '1', '2', '3', or '4' for the associated
pump A, B, C or D to toggle the feature OFF.
This feature prevents pump pressure 'hunting' when delivering at low
flow rates (<0.25 mL/min for all models). When this function is ON,
the pump pressure may exceed the setpoint by up to 3 psi without the
piston backing up to reduce the pressure. If the pump pressure
exceeds the setpoint by more than 3 psi, the motor will reverse the
piston until the 3 psi dead band maximum is reached. No dead band is
allowed if the flow rate is above 0.25 mL/min when the pressure error
is negative (pressure below the setpoint).
If the 3 psi positive pressure error is not acceptable at low flow rate,
toggle the dead band feature OFF by pressing '1', '2', '3', or '4' for the
associated pump A, B, C or D. This feature is ON by default.
Beginning with Rev. 1.05 firmware, the Modbus RTU communications
protocol is supported. Rev. 2.0 or higher firmware supports Modbus
TCP communications protocol. Complete information about using
Modbus RTU and Modbus TCP communication is provided in
Section 7 "Modbus Configuration".
Section 3 Basic Programming and Operation
3-11