Operation
Our experience in the design and construction of vibrating wire instruments has enabled us to design and create the datalogger CUM3000, characterized by the most actual electronic components available today combined with tested and reliable measurement methods.
The unit uses high-resistance components, meeting the security requirements of the most important institutions, such as testing for electromagnetic compatibility required by ENEL.
The data logger is designed to ensure maximum reliability and durability in harsh environments and difficult conditions such as those found in the monitoring of dams.
Protection to the entrance of signals (input signals), and power source, and multiplexers with relay in a nitrogen environment, ensure hardware settings have maximum security and reliability.
The data logger is configured and managed through both the display and integrated keypad or through the configuration function of the Sentinel monitoring software suite.
It can be configured for automatic acquisitions with adjustable frequency or perform precise measurements with both local commands from the keyboard and remotely through the application of real-time Sentinel software.
The parameters of each sensor connected to CUM3000 can be configured and stored directly in the data logger enabling the communication of measurements in electrical format and physical units.
The measurements and configurations are automatically transmitted via modem or other remote communication systems or locally transferred through the connection of a PC or other portable device.
The CUM3000 can function either as a stand-alone unit or connected to the data logger network (multilogger systems).
Depending on the number and type of connected sensors, it can be provided in low power configuration power supply batteries mod D.
The CUM3000 is capable of reading almost all instrumentation present today on the geotechnical and structural market, including:
- Level meters
- Automatic coordimeters
- Crackmeters
- Strain gauges
- Piezometers
- Meteorogical sensors
- Thermometers
- Inclinometers
- Vibrating wire sensors
- Analog sensors
- Potentiometric sensors
- Sensors and systems with digital output
Technical Specifications
| N° of Channels |
0 ÷ 128 |
| A/D Converter |
24 bit |
| Type of selector |
Relay with 2 or 4 contacts, current of contact 1A, contact resistance < 50mΩ, insulation tension : between contacts and open circuit 1500 Vdc, between contact and coil 2000 Vdc, insulation resistance 1000 MΩ |
| Memory |
15360 measurements |
| Communication Ports |
N°1 Serial Port of Communication with PC: RS-232 / RS485 / RS422. (1 bit of start, 1 bit of stop, 8 bit of data, no parity, velocity 75 ÷ 19200 baud)
Communication Serial Port with sensors (channels MUX): RS-232 / RS485 / RS422. (1 bit of start, 1 bit of stop, 7/8 bit of data, parity E/0, velocity 75 ÷ 19200 baud) |
| Interval of acquisition |
2min. / 5min ./ 20min. / 1hour / 6hours / 8hours / 12hours / 24hours / 48hours / 1week |
| Clock |
Accuracy 1 minute / month |
| Type of modem |
GSM; GPRS; 2G;Satellite;ADSL; Analogic for phone line PSTN; Radio 2,4Ghz; Radio VHF; |
| Alarms |
Adjustable thresholds |
| Power Supply |
12 Vdc |
| Absorption |
5 VA max |
| Consumption |
20 micro Ampere in Stand by and 60 mA in full uses |
| Chassis |
Painted aluminum ; thickness 2mm |
| Operation temperature |
– 40 °C + 85 °C |
| Display |
Alphanumeric LCD (20 digits x 4 rows), Led backli |
| Keyboard |
Composed by 6 function keys; momentary button protected by polycarbonate film thickness 175 µm |
| Input Protection Sensor |
Transzorber Overvoltage Protection on relay board for each sensor |
| Autonomy |
At least 6 months with 4 acquisition a day and 24 VW connected sensors |
| Data Output |
In physical units after appropriate programming |
| Dimensions of chassis |
162mm x 114mm ; h = 85,6mm |
Technical Specifications for different type of sensor
| Measurable Sensors |
Accuracy Measurement |
Measuring Range |
Resolution |
Vibrating Wire
(350÷6000)Hz |
0,01 % f.s. |
350÷6000Hz |
0,01 Hz |
Voltage
± 5Vdc |
0,003% f.s |
± 5000 mV |
0,010 mv |
| Current 4÷20 mA |
0,02% f.s. |
4 ÷ 20 mA |
0,762µA |
Potentiometer Magneto
Resistive
1÷10 KΩ |
0,001% f.s |
±50% |
0,001% |
Thermo – resistance
PT100 |
0,06% f.s. |
– 50 ÷ + 99 °C |
0,06°C |
Thermo – resistance
CU30 |
0,06 % f.s. |
– 50÷+ 99 °C |
0,06°C |
| Pulse counting |
1 pulse |
0 ÷ 65.536 pulses |
1 pulse |
Potentiometer Resistive
1KΩ÷10KΩ |
0,001% f.s. |
± 50% |
0,001% |
Resistance
0÷1000Ω |
0,02% f.s. |
0,000÷ 99,999 Ω |
0,001Ω |
| Resistive Bridge |
0,003% f.s |
±9 mv /V |
0,0001 mv /V |
| NTC |
0,06°C f.s. |
-20÷80 °C |
0,06°C |
Vibrating Wire GALILEO
(350 ÷6000 Hz) |
0,01 % f.s. ra |
350÷6000Hz |
0,01 Hz |
Vibrating Wire
Maihak |
0,01 % f.s. |
350÷6000Hz |
0,01 Hz |
| Carlson / C° |
0,06 % f.s. |
– 50 ÷ + 99,9 °C |
0,06°C |
| Carlson / Ratio |
0,003% f.s. |
70÷130% |
0,001% |
| Carlson / Ohm |
0,02% f.s. |
20 ÷ 80 ohm |
0,001Ω |
Multiplexer Mux 8
| Number of channels |
8 |
| Type of internal relay |
2 or 4 contacts |
| Resistance to insulation a.c. |
At least 1000MΩ |
| Insulation Voltage a.c. |
1500V between contacts; 2000V between contacts and coil |
| Conduction Resistance |
Less than 50mΩ |
| Maximum contact current |
1 A |
| Protections from overvoltages |
Protections from overvoltages on transzorber on relay card for each sensor |
| Power Supply |
12V |
Chassis Multiplexer
| Type |
Painted aluminum – thickness 2mm |
| Protection Degree |
IP 40 (EN60529) |
| Operation temperature |
– 40 to 85 °C |
| Installation |
Connection on a DIN bar |
Technical Assistance
If you have any requests or questions about our instruments or if you have special needs that require different solutions from the standard, please contact us. Our team will provide all the necessary information and will be very happy to work with you to study, develop and customize instruments and solutions suitable for your specific needs.
All information in our datasheet is subject to change without prior notice.
Please check the datasheet/details carefully and contact Pizzi Instruments for further information.
