A753 addWAVE GPRS RTU
A753 addWAVE GPRS RTU
- Compact data logger with integrated cell modem
- IP-67; ultra-low-power design; WMO compliant measurement methods; high analog resolution; large integrated memory (2MB = ~ 6 months of 15-minute data)
- GSM, GPRS; UMTS optional
- 12 x analog 0…1/2,5VDC (3 channels also support 0…150mV); 4 pulse counters (2x 500Hz fast counters / 2x 50Hz counters); 4 digital I/O's (expandable with A553 to up to 52 digital I/O's); 40 SDI-12 values; Modbus via adapter
Like all ADCON RTUs the A753 addWAVE GPRS is a fully integrated unit: datalogger, cell modem and battery all together, fit into an extremely compact and robust aluminum case. In contrast to standard logger solutions this RTU does not need a separate enclosure, lots of wires to modem, battery and antenna, complicated setup to make the logger talk to the modem, etc. - this RTU is truly plug and play. Connect the sensors and your solar panel by simply screwing in a connector, insert your SIM card, program your PIN code (for security reasons) and the IP address of your A850 Telemetry Gateway - ready to go!
In combination with Adcon's ultra-low-power sensors this RTU also runs off an extra small solar panel, about the size of a sheet of paper in DIN A5. That not only reduces wind pressure a lot, it allows for a light installation and it usually keeps thieves away - it's just too small to be attractive.
Supporting many analog and digital sensors, lots of pulse counters and even TTL outputs, it can be expanded to far beyond 100 I/O channels, making it a truly universal RTU for all kinds of environmental monitoring tasks.
Main characteristics:
SDI-12 port Integrated
Max. number of SDI-12 sensors 40
Modbus option yes
Analog resolution 16-bit
Sensor excitation voltage stabilized or battery voltage
Sampling methods synchronous or asynchronous
Max. counter frequency 2 x 50 Hz
2 x 500 Hz
Integrated wind gust monitor yes
Rain intensity monitoring yes
Integrated mV amplifier yes
Data memory 2MB (4MB optional)
Battery internal; 6V 3100mA; NiMh
Case aluminum, IP-67 rated
For which applications is A753 particularly well suited? Here are a few examples:
Agriculture
It's easy to install and easy to maintain, yet very robust with low maintenance requirements. Compatible with all Adcon sensors it offers a lot of expansion options and is ideally suited to monitor diseases, evapotranspiration, soil moisture and temperature and other parameters.
Professional Weather Stations
The professional meteorologist expects his equipment to provide high resolution, wide temperature ranges, WMO compliant measurement methods, particularly for wind gust monitoring, lots of expansion options, lots of memory, flexible sampling intervalls, and more - all this and more are part of A753's feature set, its compact design and low price notwithstanding.
Environmental monitoring of water and air quality
Thanks to the SDI-12 sensor standard a large number of multi-parameter probes has surfaced on the market, especially such for monitoring up to 16 water quality parameters simultaneously. A753 supports up to 40 SDI-12 sensor values, and 12 additional analog channels for 0-1/2,5V output signals with 16-Bit resolution across the RTUs full operating temperature range.
Flood warning and rain intensity monitoring
Many countries require data loggers to store the date and time of each pulse of a rain gauge in order to accurately calculate rain intensity. A753 can do even more, and additionally store up to three analog values, read at the same time as the pulse, e.g. wind speed and direction.
Detecting pressure hammers in water distribution pipelines
Using the measuring method originally developed for wind gust monitoring it is now also very easy to detect pressure hammers, which can cause a lot of damage to pippelines. Reading pressure 4 times per second and calculating a 3-second average, the highest of which is stored and transmitted, it becomes easy to accurately spot when and where such a pressure hammer has occurred.
Other applications
- Monitoring equipment with high frequency
- Access control
- Frost warning
- Leak detection
- Level metering in ground and surface water bodies
- Soil moisture monitoring
- and much much more
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| Mechanics: | |
| Case | Aluminum, powder coated |
| Protection class | IP-67 |
| Dimensions / weight | 160 x 60 x 80 mm / 1.200 gr. |
| Connectors for sensors and power | 4 x M9 female 7-pin to sensor 1 x M9 female 5-pin to power Made in Germany by Binder IP-67 protection class Sockets: brass, nickel plated, with gold plated socket contacts Protective cap |
| Antenna connector | TNC with external seal, water tight, Made in Germany |
| Mounting | Mast mounting bracket, integrated |
| Operating temperature | -20°C ... +65°C / -4°F ... 149°F extended temp. range from -30°C ... +75°C / -22°F ... 167°F upon request |
| Logger: | |
| I/O channels | 60 |
| Analog inputs | 12 x 0...1V/2.5VDC (3 channels on Port C can be programmed to a measuring range of 0...150mV DC low temp. drift with internal amplification) |
| Digital inputs | 40 x SDI-12 Values |
| Counter inputs | Total of 4 inputs: 2 for standard reed switches, debounced, e.g for rain gauges; max. 50 pulses per second. Min. pulse length 17ms, min. break time 17ms 2 for fast puls generators, e.g. wind speed sensors or flow meters; max. 500 pulses per second. Min. pulse length 1ms, min. break time 1 ms. |
| TTL In- / Outputs | 4 x TTL compatible status inputs or switching outputs, programmable; of which 1 x 5V (Port A) and 3 x 3.3V (all others) |
| Analog resolution | 16-Bit |
| Sensor excitation voltage | Programmable: - Unregulated battery voltage from 5.5V ... 7.5V - Stabilized voltage, programmable from 3.3V ... 5.5V in 0,1V increments |
| Memory | 2MB for up to 500.000 values, depending on types of sensors attached (SDI-12 typically needs more memory than analog) Example: 15-minute data of an ETo station can be stored for 6 months. 4MB: ex works the A753 can also be equipped with 4MB of memory to double it's storage capacity beyond 1 year for a standard ETo station. |
| Special Logger functionality: | |
| Wind gust monitoring | Port C + Adcon wind sensor: 4 samples per second, 4 times per second calculation of 3-second average; Date and time of gust stored |
| Wind vector monitoring | Port C + Adcon wind sensor: wind direction is measured simultaneously with speed, weighed depending on speed, and stored as a vector |
| Rain intensity monitoring | Port D + rain gauge with pulse output (max. resolution: 1 second). Date and time of ech pulse are stored; in addition up to 3 analog signals and 2 counter inputs can be stored, e.g. wind speed and air temperature |
| Pressure hammer detection | Port C + Adcon manometer sensor: manometer is permanently excited, sampled 4 x per second, and a 3-second average is stored |
| Low Voltage amplifier | Port B: sensors with an analog output of 0-150mV can be connected directly; internal amplifier |
| Asynchronous sampling | To prevent sensors from influencing each others readings when read simultaneously ports can be sampled sequentially |
| Event-Monitor | To rapidly detect status changes on a digital input it can be sampled up to once per second; date and time of each status change are put in memory; attention: with frequent status changes this can generate a lot of data! Applications: error detection on equipment, access control, pump monitoring, etc. |
| Data transmission: | |
| Frequency ranges | 900 & 1800 MHz (Europe) and 850 & 1900 MHz (Americas) |
| Modem | Telit G24 Optional: Telit H24 UMTS 7-Band |
| SIM-Cards | small form factor |
| Security | SIM-cards can be PIN-code protected |
| Connection types | - GSM: CSD Circuit Switched Data - GPRS - UMTS: optional |
| GPRS connection settings | Programmable: - permanent connection - scheduled connection, from 1 x per minute to 1 x per day |
| Antenna | Omni directional, vertical, TNC jack, +2dBi |
| General: | |
| Power Supply | internal 6.2V battery, charged by solar panel or mains power supply |
| Battery | Panasonic hi-temperature cell, industry grade, NiMH, 3.300mAh |
| Type approvals | FCC, R&TTE, CE, Industry Canada, ACMA Australia |