QUICK BENCH TEST:
Connect Sensor as shown below, then Power. Test operation of the DFM-IV by holding the sensor in
one hand and rubbing your thumb or fingers briskly across the face (plastic surface) of the sensor.
Allow 15 seconds for the DFM-IV to process the signal and display a flow value.
CONNECTIONS:
POWER INPUT: The standard 115VAC model requires AC power input between 100 to 130 VAC
50/60Hz (2 amp fuse is recommended). No adjustments are necessary for voltages within this range.
Optional 230VAC requires power input between 200 to 260 VAC 50/60Hz. (See OPTIONS section of
this manual for connection of optional 12VDC or 24VDC power input).
IMPORTANT NOTE: To comply with CSA/NRTL electrical safety standards, AC power input and
relay connection wires must have conduit entry to the instrument enclosure.
Page 3
DFM-IV Doppler Flow Meter
Manual Series A.6
RCVR
N.O C N.C N.O C N.C N.O C N.C
RELAY 1
RELAY 2
RELAY 3
L N G
AC
RX PU GND TX
RS 232
N.O C N.C N.O C N.C
A
B
RELAY 4
RELAY 5
INPUT
TMTR
SYNC
4 - 20
OPTIONAL
VOLTAGE FREE
DRY CONTACTS
(BY CUSTOMER)
GROUND STUD
:
ATTACH CABLE
SHIELDS (SENSOR,
4-20mA, RS232)
THIS END ONLY
IMPORTANT
IMPORTANT:
MUST CONNECT TO A
GOOD GROUND (<1 Ohm)
WITH 12 AWG CONDUCTOR
100-130VAC (50/60 Hz)
OPTIONAL:
200-260VAC (50/60 Hz)
*
*
ALUMINUM
CHASSIS
