Adcom A723, A720 manual Changing the battery

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CHAPTER 3

Using the RTU

Table 1 shows the addIT devices’ expected operation time on a fully charged battery with 50 mA total consumption for the sensors, as described above.

Table 1. addIT Device Operation Time
Radio	Sensor Sampling	Average	Estimated
		Consumption	Operation
Activity	(samples/15 min)
		(µA)	(days)
No	No sensors	450	92
Yes	No sensors	540	77
Yes	1	750	55
Yes	3 (default)	1080	38
Yes	5	1450	28
Yes	15	3100	13

Note: Radio activity refers to the fact that one base station and between one and three A730MD or addIT remote stations are active on the same operating frequency as the addIT remote station under test.

However, if for some reason (wear-out or accident) the battery loses its capacity (noted in the software with repeated “Battery low” messages), it must be replaced. Make sure, though, that the problem is really due to the battery and not to a defective or dirty solar panel.

Note: The solar panel works only with the A720/A723 devices. The A720B receiver’s internal battery is charged by the power supply.

Adcon highly recommends that you check the solar panels’ state and clean them often. The rain droplets can splash thin layers of soil on the panels, greatly reducing their power output. The sur- rounding vegetation can also lower the panels’ efficiency.

Changing the battery

Note: The same type of battery is used in the A720/A723 and A720B devices, so the information in this section also applies to the A720B.