Pulsar Quick Start Manual  -  Blackbox Series 
Congratulations on your purchase of a   
Pulsar Blackbox! 
This quality system has been developed with the 
latest digital ultrasonic technology for liquids, 
slurries, and solids.  No more noise and beam 
angle issues. 
 
It provides non-contacting level (volume in-
cluded with the keypad/display version) with 2 
user-defined relays.  Comes standard with 
110VAC, 12VDC and 24VDC power.  Options: 
4-20mA, 0-5VAC, Modbus RTU, Profibus dP, 
and Ethernet output versions are available. 
LIQUIDS and SOLIDS
 
•  Mount the transducer away from any obstructions, fal-
ling water/solids, rough walls, pumps, switches, etc…  
•  Visualize looking down the echo path of the transducer 
and seeing a nice clear shot (2’+ dia.) to the very bot-
tom during fill and empty cycles.  
•  Ensure the maximum level does not come within the 
minimum dB blanking distance.  
•  Confirm the inside of the standpipe is smooth and does 
not have any protrusions at the weld. 
•  Do not hang the transducer by the cable. 
•  Typically, mount the dB transducer 1/2 the tank radius. 
(Call Pulsar Technical Support for Special Service 
Passcode and Instructions 850-609-1777.) 
 
LIQUIDS 
•  Dome top tanks will require Gain & Algorithm change. 
•  If reading false level, use P21 and set true distance 
SOLIDS
 
•  Consult factory if the silo is extremely dusty—we can 
increase the return signal strength (even during fill).   
•  DATEM may map-out the true echo.  Use P21 to set 
true distance and turn “Update Datem” off! 
•  If acoustically noisy, change Algorithm to Largest. 
TRANSDUCER WIRING 
TERMINAL       IF SPLICING 
 
RED = POWER     RED = BLACK 
 
WHITE = SIGNAL     WHITE = WHITE 
 
BLACK & GREEN = 0V     BLACK & GREEN = SHIELD 
 
•  Use any standard, 2 conductor/shielded pair for splic-
ing (recommend 18 AWG gauge, UV protected) 
•  Use 16 AWG gauge if going 500 - 3,000 ft cable run. 
•  Transducer shield is required  - do not cut or float! 
•  Confirm Mains Voltage Selector is set to 115VAC. 
 
.5-10 ft  1-20 ft  1-33 ft  1.7-50 ft  2-82 ft  3-132 ft 
dB 3  dB 6  dB 10  dB 15  dB 25  dB 40  Aiming Kit 
Pulsar, Inc., PO Box 799, Shalimar, FL  32579   Phone: (850) 609-1777   Fax: (850) 651-4777   support@pulsar-us.com 
Blind Version 
 
TRANSDUCER INSTALLATION TROUBLESHOOTING