PULSAR MEASUREMENT
11
Functional Description
Ultra 4 sends a transmit pulse to the transducer, which emits an ultrasonic
pulse or radar signal (dependent on transducer) perpendicular to the
transducer face, and the returned echo is sent back to the Ultra 4. The time
taken to receive the echo is measured and the distance from the transducer
face to the surface being monitored is calculated.
Ultra 4 can measure from zero to 40m from the face of the transducer to the
surface being monitored, dependent on the application chosen and
transducer used.
The relays can be programmed to activate alarms, pump starters, or other
control equipment. There is an isolated 4-20 mA output that can be
connected to a recorder or PLC, to monitor, depending on application
chosen, level, space, distance, OCM head, OCM flow or volume,
independently from that shown on the display. There is an RS232 port, so
that the Ultra 4 can be operated remotely by a PC or other equipment.
Ultra 4 can be programmed either by the built-in keypad (standard on all
wall and fascia units), via the SD card slot or by PC via the RJ11 Serial
Interface. All parameters are stored in a non-volatile memory, so are
retained in the event of power interruption. A second backup copy of all
parameters can also be retained in the Ultra 4 memory, in case an alternative
set of parameters needs to be stored.
Four user definable relays with individual setpoints and intelligent
performance logging software features ensure maximum control versatility.
The system utilises the unique DATEM software (Digital Adaptive Tracking of
Echo Movement). This is a proven digital mapping technique developed
especially for the Pulsar Ultra range, which gives the system unequalled
ability when identifying the “true target level” in the face of competing
echoes from pipes, pumps, or other obstructions. Coupled with the powerful,
long-range abilities of the ‘all new’ dB transducer range, the Ultra 4 lives up
to its reputation as the most reliable ultrasonic level measurement system
available.
The Pulsar Ultra 4 ultrasonic level controllers have been designed to provide
maintenance-free fit and forget performance.
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