D Series Syringe Pumps
Section 3 Basic Programming and Operation
3-9
Press CALA, CALB, CALC, or CALD to select the correct pump,
enter the calibration number, and press ENTER.
3.6.4 Diff. Modes 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
transducer 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.
3.6.5 Press. Integral 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 for anything but 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.
3.6.6 Pressure Deadband This feature prevents pump pressure “hunting” when delivering
at low flow rates (<0.12 ml/min for the 30D pump or < 0.25
ml/min for other models). When this function is ON, the pump
pressure may exceed the set point by up to 3 psi without the
piston backing up to reduce the pressure. If the pump pressure
exceeds the set point 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
(0.12ml/min for 30D pump) or when the pressure error is neg-
ative (pressure below the set point).
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.
3.7 Menu Four
3.7.1 Modbus Options Beginning with Rev. 1.05 firmware, the Modbus RTU communi-
cations protocol is supported. Rev. 2.0 or higher firmware sup-
ports Modbus TCP communications protocol. Complete
information about using Modbus RTU and Modbus TCP commu-
nication is provided in Section 7 Modbus Configuration.
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