PULSAR MEASUREMENT 
 
5  
CONNECTIONS 
 
POWER INPUT: The standard model requires AC power input between 100 to 240 VAC 50/60Hz. No adjustments 
are necessary for voltages within this range. Connect L (Live) N (Neutral) and AC Ground. 
 
Optional DC input model requires 9-32 VDC/10 Watts. Connect to + and - terminals.  
 
Optional Thermostat and Heater modules are available rated for 115 VAC or 230 VAC. 
 
IMPORTANT NOTE: To comply with CSA/UL electrical safety standards, AC power input and relay connection wires 
must have conduit entry to the instrument enclosure. Installation requires a switch, overcurrent fuse or circuit 
breaker in the building (in close proximity to the equipment) that is marked as the disconnect switch. 
 
Risk of electric shock. Loosen cover screw to access connections. Only qualified personnel should access 
connections. 
 
Note: Use of instrumentation over 40°C ambient requires special field wiring. 
 
QUICK BENCH TEST  
 
Connect Sensor as shown on next page, then Power. Test operation of the DFM 6.1 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 6.1 to process the signal and display a flow value.