User's Manual

Configuring an A73x RTU in the addVANTAGE software

Modem in GPRS network: 3 seconds off, half a second on with short blinks in the

off periods.

TCP connection to Gateway established: Blinking in a half-second-on, half-second-

off rhythm.

2.6 Configuring an A73x RTU in the addVANTAGE

software

To configure the A73x RTU with an A840 Telemetry Gateway and the

addVANTAGE 4 Pro software, check the Base Station, Telemetry Gateway A840

and Wireless Mode A440 User Guide.

2.7 Maintaining and servicing the RTU

The A733 unit needs virtually no maintenance. It is waterproof and designed to

withstand harsh environmental conditions (-30 to +70 °C, or -22 to 158 °F), high

RH values, water, and other non-corrosive liquids. It conforms to the European

protection class IP65. These standards also apply to the connectors, as long as

they are mated or capped. Don’t let unmated/uncapped connectors on either the

A73x RTU or the sensors be exposed to the environment for extended periods of

time. When used in coastal areas with high salt content in the air, use an extra

protective case to avoid corrosion. Avoid spraying agrochemicals on your RTU, as

they might form very aggressive compounds.

2.7.1 The RTU battery

The internal battery supplies 6.2 volts and consists of either a NiCd (radio RTUs) or

a NiMH (GSM/GPRS) battery pack. The internal electronics manage the battery

charging/discharging process, ensuring it a long life. This approach, coupled with a

remarkably low average consumption (6 mW for the standard RTU and 15 mW for

the GSM RTU), allows an A73x RTU to operate at least two weeks on a fully

charged battery, with the following conditions:

• The channel has moderate radio activity, with requests every 15 minutes.

• Total consumption of attached sensors is 100 mA.

• The sensors are sampled once every minute and an averaged slot is

stored in the internal memory every 15 minutes.

Table 1 shows the A73x device’s expected operation time on a fully charged

battery under various conditions. The sensor consumption totals 100 mA.

Radio Activity Sensor Sampling Average

Consumption (mA)

Estimated

Operation (days)