36
BE 58-602 Pulsar
®
Model R96 Radar Transmitter
3.0 Reference Information
This section presents an overview of the operation of the
PULSAR Model R96 Radar Level Transmitter, information
on troubleshooting, common problems, listings of agency
approvals, lists of replacement and recommended spare
parts, and detailed physical, functional and performance
specifications.
3.1 Description
PULSAR Model R96 is a two-wire, 24 VDC, level trans-
mitter based on the concept of pulse burst radar. The elec-
tronics are housed in an ergonomic housing comprised of
two tandem compartments angled at a 45 degree angle for
ease of wiring and calibration. These two compartments
connect via a watertight feed-through.
3.2 Theory of Operation
3.2.1 Pulse Burst Radar
PULSAR Model R96 is a top-mounted, downward-looking
pulse burst radar operating at 6 GHz. Unlike true pulse
devices (GWR, for example) that transmit a single, sharp
(fast rise-time) waveform of wide-band energy, PULSAR
Model R96 emits short bursts of 6 GHz energy and meas-
ures the transit time of the signal reflected off the liquid
surface. Distance is calculated utilizing the equation:
Distance = C
×
Transit time/2, then developing the Level
value by factoring in application-specific configuration. The
exact reference point for distance and level calculations is
the Sensor Reference Point—bottom of an NPT thread, top
of a BSP thread or face of a flange.
Sensor Reference Point
Pulse
Pulse Burst
500 ns
NPT
Process
Connection
BSP
Process
Connection
ASME or EN
Welded Flange
Distance = c × (time ÷ 2)
1 ns
