NT INTEGRATED FLOW CONTROLLER WITH DEVICENET COMMUNICATION
3
Entegris, Inc. | User Guide
FACTORY CONFIGURED
—
The standard NT Integrated Flow
Controller is pre-configured from the
factory for the flow range specified
by the user. The specified flow range
is found on the label of the unit. The
unit control algorithm uses pressure
and flow measurements to ensure
proper operation within specification.
CONTROL MODE FUNCTIONS
—
There are two types of control mode
functions defined for this product:
Normal Operation: A setpoint input
of <5% of full scale will cause the
valve to close to a leak tight seal.
This is for batch applications where
the user is dispensing a given flow
rate for a given period of time.
Actuator Override: An actuator
override DeviceNet communication
message is sent to suspend control
and leave the valve in its present
position, regardless of setpoint
input value.
AUTOZERO FUNCTION
—
If autozero is enabled and the set-
point is set to <5%, the valve closes
and the flowmeter will enter into the
re-zero routine. Upon application
of a setpoint greater than or equal to
5%, a new differential pressure (DP)
zero value will be stored in non-
volatile memory and the unit will
immediately resume operation.
Autozero is a selectable option
through DeviceNet communication
messaging with a default setting of
‘enabled’. It will not increase system
response time. The autozero routine
will determine DP zero values based
on a weighted average routine.
CALIBRATION REFERENCE
CONDITIONS
—
Unless otherwise noted, the specifi-
cations listed for the NT Integrated
Flow Controller with DeviceNet
communication are referenced under
the following operating conditions:
PARAMETER
REFERENCE CONDITION
Process fluid
Deionized water
Process
temperature
23°C ±3°C
(73°F ±5°F)
Ambient
temperature
23°C ±3°C
(73°F ±5°F)
Relative humidity
50% RH, ±10% RH
Process pressure
138 – 207 kPa
(20 – 30 psig)
Supply voltage
24 VDC, ±10%
Warm-up time
5 minutes
Orientation
Horizontal
Operation
Flowmeter zeroed
