Ott Hydromet KALESTO Water Level Sensor User Manual Kalesto def

Ott Hydromet GmbH Water Level Sensor Kalesto def

Contents

Users Manual FCC radar sensor leaflet

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23
Kalesto
Examples of use
Features
Installation / Function
Mountain stream Sediment loaded riversRiver with debris
The Kalesto can be fitted easily and quickly, on a bridge, measuring
frame, pipeline or ‘extension arm’, for example.
The water level is measured contactless from the air
⇒ absolute measuring principle.
The Kalesto sends radar waves (microwaves) perpendicular to the water
surface. These waves are then mixed with the signals reflected on the
surface.
An intelligent signal processor (DSP) calculates the exact distance x
between the sensor and the surface of the water.
Digital measured values, status values and any error
messages present are scanned by means of an
external data logger via the RS 485 interface.
The data logger calculates the water level y out of
the system length b and the distance x and makes
the stored values available for further processing.
Installation at a ‘extension arm’
Non contact measuring principle, no damage caused by silt accumulation or debris
Simple, inexpensive installation - no difficult fitting procedure necessary
12 V DC power supply; low power consumption enables operation with rechargeable batteries or solar
Cost reduction due to low maintenance requirements
RS 485 interface (data line up to 1.000 m), optional SDI 12 signal (RS 485 ⇔ SDI 12 converter)
Integrated lightning protection fitted as standard
Minimal risk of vandalism due to robust, weatherproof housing (IP 68)
Example for installation:
‘extension arm’
Kalesto
OTT-LOG
GSM-Transmission
solar powered
The Kalesto radarsensor represents a new type of level measurement for surfacewater
which offers many advantages in hydrological field applications.
Kalesto is the first level sensor from OTT which does not come in direct contact with the
water. Thanks to its compact design and the non-contact measuring principle, the sensor
can be installed easily and inconspicuously, at no great cost in terms of time or money.
With the Kalesto, problems like disruption of measuring operation caused by high-water,
silt accumulation, debris, plant growth etc. as well as time-consuming maintenance are
eliminated.
Cumbersome stilling wells are replaced by an integrated software filter for averaging wave
motion. The measuring signals are transferred to a data logger by means of a RS 485
interface, over distances of up to 1,000 m. A power supply of 12 V (rechargeable battery, solar energy) and low
power consumption enable the device to operate independently in the most remote areas. Kalesto is particularly
suitable for areas where conventional measuring systems cannot be used or where a station needs to be set up
quickly and inexpensively.
In addition to the conventional applications, the Kalesto is also suitable for use in:
Brackish water, drains, rivers where great fluctuations are present
– no contact with the measuring medium
Irrigation canals, grachts, falajs
– simple installation e.g. on an extension arm
Water containing large amounts of suspended matter e.g.: mountain streams, wadis, etc.
– no silt accummulation
– sensor is easily moved e.g. when changes in water cross-section (low flow) occur, compared to stations with a
gauging shelter and stilling well or inlet pipe
Short-term measurements, portable operation
Easy to handle - the same sensor can be used for a variety of projects without any need for alterations. The usual
inconvenience associated with fixed lengths of measuring tubes, pressure sensor cables or float cable is thus avoided.
Weirs, harbour basins, dam walls, recharge dams
Not installed in water ⇒ the hydraulic system is not damaged; unaffected by construction and maintenance work.
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63.100.000.P.EDI-II/1.109909 KKW
OTT MESSTECHNIK GmbH & Co. KG
Postfach 21 40 · D
-
87411 Kempten
Ludwigstraße 16 · D
-
87437 Kempten
Tel. ++49 (0)831 / 56 17-0 · GERMANY
Fax ++49 (0)831 / 56 17-209
eMail: info@ott-hydrometry.de
http://www.ott-hydrometry.de
Extensions
Technical Data
4
Kalesto
Radarsensor
for the touchless
measurement of
surfacewater level
Accuracy:
± 1 cm (± 0.03 ft) over the complete
measuring range
Temperature range: - 40 °C ... + 80 °C
Sensor technology:
Touchless measurement of water level using
the FMCW principle (Frequency Modulated
Continuous Waves)
microwaves: 24,125 GHz, 5 mW
beam width: ± 5°
dead range: 1.5 m (5 ft)
installation distance: min. 1 m (3 ft), e.g.
from a wall
measuring interval: 17 sec. (40 values,
creating mean values)
Power supply:
Nominal 12 V DC 9 ... 15 V DC (accu, solar-
or mains supply)
– 500 mA active
– < 1 µA stand by
Integrated lightning protection (standard):
to reduce the possibility of damage caused
by over voltage (lightning).
RS 485 interface:
– digital data transmission up to
1.000 m (3,000 ft) distance
– Transmission rate 9.600 bps
Signal line:
Connection Radarsensor ⇔ data logger.
Standard length 3 m (10 ft) (max. 1.000 m /
3,000 ft)
– Outer-dia = 6 mm incl. connecting clamps
Sign of registration:
Kalesto / OTT LOG - an ideal combination
Circular memory, buffered for up to 400,000 measured values (1 MB)
– preselectable sample- / storage intervals
– event-driven recording
RS 232 interface for directly connecting the Kalesto HYDROSENS combination to various remote data transmission systems
(serial modem / GSM, satellite, radio, etc.).
Three additional slots for connecting other sensors (e.g. for conductivity, temperature, precipitation, etc.).
CAN-bus for connection to other HYDROSENS modules, such as an OTT-COM communication module
– Alarm management when levels either exceed or fall below limit values and connection to an OTT-S measured value
announcer.
Wall-mounted cabinet, IP 64 (190 x 250 x 140 mm W/H/D) for housing the OTT-LOG data logger
Optical interface (infra-red technology)
Reading of OTT-LOG stored values on site with a notebook or VOTA multifunctional unit.
LCD for clear display of system and sensor parameters (level recorder function).
Operating terminal
A clearly laid-out operating matrix allows parameters for the data logger and the relevant sensors to be set quickly and
directly on site using the integrated touch-sensitive keyboard.
OTT-LOG
Multi-channel
data logger
HYDROSENS
«MIDI»
Dimensions:
Dia:
160 mm
Length:
560 mm incl.
mounting threat
M 16 x 60 mm
Weight:
8 kg
Material:
Aluminium body, UV resistant plastic (POM)
cover, protection IP 68
Measuring range: 1.5 ... 30 m (5 ... 90 ft)
Resolution: 1 mm (0.01 ft optional)
Small design details may be changed without notice.
Delivery program, e.g.:
Raingauges
Shaft Encoders
Data Loggers
Remote Data Transmission
Waterlevel Recorders
Current Meters
Thread
M16
Ø 160 mm
560 mm

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