KROHNE OPTISONIC 7060 EN - Manual (Page 12)

OPTISONIC 7060
Electrical & mechanical installation manual 730962.31.00 page 12 of 52
2.3.2 Ultrasonic Transducers
The OPTISONIC 7060 ultrasonic transducers are optimised to suit the system requirements.
The high quality of the transducer parameters provides the basis for accurate and highly
stable propagation time measurements with nanosecond precision. The ultrasonic
transducers are of an intrinsically safe design (class "ia").
2.3.3 Signal Processing Unit (CONVERTER)
The CONVERTER contains all the electrical and electronic components required for controlling the
ultrasonic transducers. It generates transmission signals and uses the received signals to
calculate the measured values. The CONVERTER also contains several interfaces for
communication
with a PC, or standardised process control system.
Event logging The current volume counter value, fault, warning, and power failure alarms are stored in a
see Section battery-buffered data memory (FRAM) along with the time of day. On system restart, the
2.7 counter value that was last saved is restored as the start value for the volume counter. The
FRAM back-up provides an unlimited number of writing cycles and protects the saved data
for at least 10 years.
The CONVERTER is supplied with a front panel containing a two-line LCD to display current
measured
values, diagnosis and logbook information (see Fig. 2.4). You can select the values you
want to display using a magnetic pen while the front cover is kept closed (for details on
operation and menu structure see Section 8.2 in the appendix).
Fig. 2.4: Front panel for the OPTISONIC 7060 CONVERTER
1. Selected measured value / device status
2. Current measured value
3. Control area for operation by a magnetic pin