Fluid Components International OEM MASS FLOW SWITCH - Manual

OEM MASS FLOW SWITCH
INSTRUMENT INSTALLATION
Installation Outline Diagram
The OEM Mass Flow Switch is an insertion instrument capable of
monitoring gas or liquid flow in a wide range of processes for purposes of
switching at a preset alarm switch point. This set point is fully adjustable
in the field. The instrument can be top or side mounted. The process
connection is male 1/4 inch NPT (or 1/2 inch NPT compression fitting). See
the installation outline drawing below for mounting dimensions.
There is an orientation mark etched onto the hexagonal surface of the
element. The flow element must be located with the orientation mark
parallel to flow. Apply an appropriate sealant to the male threads when
connecting the flow element to the process. Tighten the element until it is
hand tight. Use a wrench to rotate the element until the flow arrow on the
hexagonal flat is in the direction and parallel to flow, ±2°. The enclosure
should be located so that the conduit port is in a downward direction. This
is to prevent moisture from collecting in the enclosure.
INSTRUMENT WIRING
Alert:
The instrument contains electrostatic discharge (ESD) sensitive
devices. Use standard ESD precautions when handling the flow
transmitter.
Caution:
Only qualified personnel are to wire or test this instrument. The
operator assumes all responsibilities for safe practices while wiring or
troubleshooting.
Recommended Minimum AWG Wire Table
Customer Wiring Diagram
Use the following steps to wire the instrument:
l FCI recommends installing an input power disconnect switch and fuse
near the instrument to interrupt power during installation, maintenance,
calibration, alarm selection and troubleshooting procedures.
l Ensure the power is off to the instrument before wiring the instrument.
l Conduit or other protective sheathing should be connected to the
1/2 inch ports of the enclosure. See the above Minimum AWG Wire
Table to determine the size of wire to use versus the distance the wire
has to be run.
l Unscrew and remove the top cover of the instrument. Lift the
circuit board assembly by pulling up on the white plastic pull
tie wrap. The customer connections are near the top of the
circuit board. Be careful not to stress the wires that are
connected to the circuit board.
l Connect 24 VDC input power to P1 +V IN and -V IN.
l Connect the 4-20mA output terminals as required.
l Push the board back into the enclosure and replace the top cover.
l Turn power on to operate the instrument.
Installation and Operation Guide
18 to 36 Vdc Optional Relay
Maximum Distance for AWG
Connection 10 ft. 50 ft. 100 ft. 250 ft.
(3M) (15M) (76M) (76M)
Input Power 22 20 18 16
4-20 Output (600 Ohm Max.) 18 18 16 14
Voltage Output 18 16 N/R N/R