6 Getting Started
Gas Connections
downstream.
Devices ship with plastic plugs seated in the processing ports. To decrease the chance of
the device.
After removing the plugs, immediately connect the device to upstream and downstream
for connections include NPT, SAE, BSPP, and VCR®
have male connections).
prevent leakage around the port threads, but
Pipe dopes or sealants are not recommended on the process connections.
These compounds can cause permanent damage to the controller should they get into
the ow stream.
Maximum Pressure
The maximum common mode pressure is PSIA. Common mode pressure is the
maximum pressure that may be applied simultaneously to both sides of the instrument
without causing damage.
!
Using the ow controller above the maximum specied common pressure
will permanently damage the internal pressure sensors. If the line pressure is above
these limits, use a pressure regulator upstream of the device to reduce the pressure
below 200 PSIA.
Maximum Flow
Commanding a non-zero setpoint prior to applying the pressure will cause the valve to be
fully open and will expose the sensor to any instantaneous changes in pressure, such as
from a snap-acting solenoid valve. For meters and controllers with downstream valves,
pressure.
Power and Signal Connections
Power is supplied to the controller through the DB9 connector on the top of the device.
The table below indicates how to connect the device to power and communication. If your
found at alicat.com/pinouts.
!
Do not power the device until all necessary pins have been properly
connected.
!
Only connect power to pin 7. Connecting power to other pins can permanently
damage the device.
A mass flow controller with male
VCR®-compatible connections.
