ULM–70
©
Dinel, s.r.o.
3
1 .
M
easuring
principle
Ultrasonic level meter ULM
®
is a compact measuring device consisting of two parts - main level me-
ter (the body with measuring electronics) and display module. Using the electroacoustic converter,
the level meters transmit the sequence of ultrasonic pulses that spread towards the surface level.
The converter recuperates reflected acoustic waves that are subsequently processed in the elec-
tronic module. The intelligent evaluation block filters out interfering signals, compares the cleaned
received signal with the false reflection map (e.g. from mixers, ladders, reinforcement etc.) and
selects a suitable reflection (echo). Based on the period during which the individual pulses spread
towards the surface level and back and based on the measured temperature in the tank, the instant
distance to the surface level is calculated. According to the level height, the level meter output is set
and the measured value is displayed on the display.
2 .
r
ange
of
applicaTions
For continuous non-contact level measurement of liquids (water solutions, sewerage water, etc.),
mash and paste materials (sediments, sticks, resins etc.) in closed or open vessels, sumps, reser-
voirs and open channels. In case the level of bulk-solid materials is measured, the measurement
range is reduced. The level meters can continuously measure levels of bulk-solid materials with
a low concentration of dust particles. Consult the manufacturer on recommended use of the level
meter for bulk-solid materials.
3 .
f
eaTures
of
varianTs
All operations described in this instruction manual have to be carried out only by trained
personnel or an accredited person. Warranty and post warranty service must be exclusively
carried out by the manufacturer.
Improper use, installation or set-up of the level meter can result in crashes in the application
(overfilling of the tank or damage of system components).
The manufacturer is not responsible for improper use, losses of work caused by either direct or
indirect damage, and for expenses incurred during installation or use of the level meter.
s
afeTy
ULM –70_ –02
Measuring range from 0.15m to 2m,
plastic PVDF transmitter, mechanical
connection with thread G 1".
ULM –70_–06
Measuring range from 0.25m to 6m,
plastic PVDF transmitter, mechanical
connection with thread G 1 ½".
ULM –70_–10
Measuring range from 0.4m to 10m,
plastic PVDF transmitter, mechanical
connection with HDPE polyethylene flange (version "N") or aluminium alloy
flange (version "Xi").
ULM–70_–20
Measuring range from 0.5m to 20m,
plastic PVDF transmitter, mechanical
connection with aluminium alloy flange.
