Operation
The procedure for automatic operation and the ability to configure and store of groups of channels has been designed with the aim of allowing the user to query a large number of sensors by connecting them to a selector switch on the unit and setting parameters typical of each sensor.
The user can then program groups of instruments individually and test them by connecting DEC3000 to the switch or multiplexer and initiating acquisition; data is then downloaded to a PC and managed by Sentinel software.
The DEC3000 is an evolution of the simple portable readout unit. The internal memory, multiple configurations and possible settings, high technology and simplicity, make it perfect for every application, from the simple reading of a few sensors to use in large measurement campaigns.
Measuring Principle
The portable datarecorder DEC 3000 is an evolution of the simple portable readout unit since it allows to carry out manual acquisition of a single instrument at a time, as well as, acquisition of data in automatic mode, and of more instruments consecutively if connected to a selector or a multiplexer.
Very low consumption allows the battery to last for long periods without the need to recharge.
For this reason the portable DEC3000 model acquisition unit is ideal to carry out long-term measurements campaigns, such as construction sites of large structures where the measures to be carried out during the day are many, the sensors are of different type and often there is no possibility to re-charge the battery of the unit.
The memory allows to set and maintain programmed the typical parameters of the sensors combining them with precise channels, then downloading all measurements taken at the end of the campaign. Similarly it is ideal to carry out single measurements, thanks to its high reliability and measurement repeatability.
High performance and the ability to read and acquire almost all monitoring instruments make this portable acquisition unit one of the most effective and versatile instruments available on the market
The DEC3000 is able to read all instruments produced by us and almost all instruments on the international market; including:
- Level meters
- Coordinometers for plumb lines
- Extensometers
- Deformometers
- Tensiometric capsules
- Load cells
- Piezometers
- Meteorological sensors
- Settlement gauges
- Thermometers
- Bar Extensometers
- Inclinometers
- Flow meters
- Vibrating wire Sensors (350 to 6000 Hz)
- others
Technical Specifications
| Memory |
15.360 (number of possible measurements to be stored) |
| Acquisition intervals |
2 min, 5 min, 20 min, 1 hour, 6 hours, 8 hours, 12 hours, 24 hours, 1 week |
| Absorption |
5 VA max |
| Autonomy of battery |
12h |
| Display |
4 rows x 20 digits – LED backlit |
| Keyboard |
With 8 keys protected with polycarbonate film with a thickness of 175 µm |
| Internal Clock |
Maximum error 1 min / month |
Digitizer
| A/D Converter |
24 bit |
| Expandibility |
Up to 479 channels by multiplexer cards at 8 external channels |
| Selector |
Relay at 2 or 4 contacts: on: < 50mΩ; off: > 1000MΩ, 1500V insulation |
| Protection |
From overvoltages by transzorber, on relay card for each sensor |
Type of reading, accuracy and resolution
| 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 Pulses. |
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 |
Chassis
| Type |
Plastic material, black, watertight |
| Dimensions |
162x114x85,6 mm |
| Index of Protection |
Case IP66, Readout Unit IP40 (EN60529) |
| Weight |
2,65 kg |
| Operation Temperature |
– 40 to 85 °C |
| Installation |
Portable |
Power Supply
| Voltage |
12V |
| Consumption |
60 mA max
0,1 mA Stand by
5VA max |
| Connectors |
On board |
| Internal Battery |
2 Ah |
Connections
| Serial Port |
1 |
| Baud Rates |
From 75 up to 57600 baud |
| Serial Protocol |
8-1-1-None |
| Electric Standard |
RS485, RS232, RS422 |
| Types of modem |
GSM, analog PSTN, Radio 2.4GHz, GPRS |
| Alarms |
Settleable thresholds |
Environmental operating conditions
| Temperature |
-40……+85°C |
| Humidity |
0……….95% rel. Max |
| Altitude |
0……….8000 mt |
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.
