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A753 UHF RTU

A753 addWAVE Series 4 is a total redevelopment of the previous A733 generation of RTUs. It offers "more" in every aspect: more resolution, more memory, more features, more flexibility and expandability - and much more. It nonetheless is still very easy to use and install, and has maintained the low-power approach of previous generations, perfectly capably of operating off our little solar panels. It is the perfect tool for professional users that want to establish and manage large scale measurement networks.

Features
  • A753 addWAVE transmits with an output power of 500mW in the 70cm frequency band between 430 and 470MHz, and can achieve distances of up to 20km (12 miles), with adequate installation even more. Its radio protocol is fully backwards compatible to A731, A732, A733 and A740. Every A753 addWAVE can simultaneously be used as datalogger and as relay station for other Adcon RTU's (e.g. A723, A732, A733). This allows to achieve distances of over 100km (60 miles) between the base station and the remotest location - data hops from one station to the next. This also allows the installation of radio stations in very difficult topographies, overcoming geographical barriers by simply transmitting around them or over them. Installing an A753 addWAVE is not difficult at all. With all major components - datalogger, radio, power supply - contained in a single, compact aluminum case, the user neither needs an external case nor specific know-how to connect the sensor cables and the solar panel to the RTU. An A753 addWAVE is capable of also supplying power to the sensors attached to it. It can either do so by feeding unregulated battery power to the sensors, or by supplying stabilized output power, programmable in 0,1V steps between 3.3 and 5.6V.

Specs

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
Sockets: brass, nickel plated, with gold plated socket contacts; IP-67 protection class
2 protective caps

Antenna connector TNC with external seal, IP-67, Made in Germany
Mounting Mast mounting bracket, integrated
Operating temp. -30°C ... +75°C

Logger

I/O channels 60
Analog inputs 12x0...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. 30 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.

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 Band 1: 430 ... 440 MHz
Band 2: 440 ... 450 MHz
Band 3: 450 ... 460 MHz
Band 4: 460 ... 470 MHz
Modem Made by Adcon Telemetry
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, 3300mAh
Type approvals FCC, R&TTE, CE, Industry Canada, ACMA Australia


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