Cello GSM Level Recorder Engineering Solutions - Imbema Belgium

Cello GSM Level Recorder
A Universal Solution for Remote Level Monitoring
The Cello GSM Level Recorder combines the
Siemens Milltronics ultrasonic level sensor with
the Technolog Cello GSM/SMS Data Logger.
The result is a battery powered level measurement
system with remote communications.
Traditionally, ultrasonic sensors and GSM
modems have been mains powered since both
devices consume significant power during
operation. The Cello GSM Level Recorder utilises
Technolog's power saving techniques to provide
up to 5 years battery life.
The system comprises two parts, the ultrasonic
sensor and the GSM data logger which are
connected via a 10m cable. This allows the sensor
to be mounted directly above the surface of the
material to be measured and the Cello to be
housed in a more convenient location.
The sensor houses the ultrasonic transducer and
temperature sensing element. The sensor emits a
series of ultrasonic pulses from the transducer.
Each pulse is reflected as an echo from the
material and sensed by the transducer. The echo
is processed and filtering is applied to help
discriminate between the true echo from the
material, and false echoes. The time for the pulse
to travel to the material and back is temperature
compensated and then converted to distance.
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Technolog can also provide a complete installation and maintenance service
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The numeric values are read by the Cello and
recorded in memory at predetermined intervals.
Periodically, such as every day, the recorded
values are transmitted by SMS (text message) to a
host computer or the Internet. The usage of SMS
is dependent upon several factors including the
recording interval and data send frequency. The
system will typically use one SMS per day. In the
event that one or more measurements are outside
preset parameters, the Cello will immediately
send an alarm message which can be received by
email, SMS or an alarm banner on the host
computer.
DS5P9000 Rev. A DMR: N / A

Technical Specifications
Input Specifications
Certification Certified Intrinsically Safe ('I.S.')
For further information contact: Technolog Limited
Ravenstor Road
Wirksworth
Matlock
Derbyshire DE4 4FY
United Kingdom
Tel: +44 (0)1629 823611
Fax: +44 (0)1629 824283
E-mail: technolog@technolog.com
Internet: www.technolog.com
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Cello I.S. Mk. 2
SIRA 06ATEX2010X - EEx ia IIC T4 (Ta=-20 to +60 Deg. C.) or EEx ia IIC T3 (Ta= -20 to +60 Deg. C.)
IECEx SIR 06.0003X - Ex ia IIC T4 (Ta= -20 to +60 Deg. C.) or Ex ia IIC T3 (Ta= -20 to +60 Deg. C.)
CSO Monitor
SIRA 06ATEX 2011X - EEx ia IIC T4 (Ta= -20 to +60 Deg. C.)
IECEx SIR 06.0002X - Ex ia IIC T4 (Ta= -20 to +60 Deg. C.)
Input Ultrasonic Level Measurement
Range 0.25 to 3 m (liquids)
Accuracy +/-0.25% F.S. (liquids)
Temperature Compensation Built-in to compensate over the operating range
Beam Angle 10° at -3 dB boundary
General Specifications
GSM Modem Frequency: 900 MHz , 1800 MHz. Integral antenna
Serial Port Type: Full duplex, asynchronous
Data rate: 1200, 2400, 4800, 9600 bps
Memory Type: Solid state, non-volatile
Size: 128K, allocatable between channels as required (max 64K/channel)
Clock Type: Crystal controlled calendar clock with leap year adjustment
Accuracy: 100 seconds per month maximum error over operating temperature range
Synchronisation: Option to synchronise clock to GSM network
Supply Type: Internally powered by a single lithium battery pack, factory exchangeable
Life: Typical battery life 5 years depending on mode of use
Recording Recording interval: programmable between 1 minute and 1 hour
Data storage: Rotating store, or store until full
Alarm Dial-Out High/low
update data more frequently after an alarm
Environmental Operating temperature: -20°C to +50°C
Protection classification: IP68
Dimensions (mm) CSO Monitor: 217(h) x 82(w) x 88(d)
Cello: 191(h) x 140(w) x 150(d)
DS5P9000 Rev. A DMR: N / A