Siemens SITRANS FUS380 - Battery

10.5 Battery
Table 10-5 Battery types
Description Specifications
Main battery
(for battery-powered
versions)
Replaceable 3.6 V LiSOCl (Lithium Thionyl Chloride) dual battery pack 34 Ah
of two D-cell types
Back-up battery
(for mains-powered ver‐
sions)
Single battery 17 Ah of one D-cell type
Note
The batteries are not rechargeable; they should be replaced after maximum 6 years.
Consumption and battery operation time calculation
For battery versions, the battery operation time depends on the connected battery pack as well
as the operation conditions of device.
Every 5 minutes the advanced power management system of the transmitter calculates the
battery consumption and the remaining battery operation time.
For battery versions, only the internal battery pack has a nominal capacity of 34 Ah giving a
typical operation time up to 6 years in a revenue application.
The ambient temperature of the transmitter also influences the battery capacity.
The typical operation time up to 6 years is based on only 80% battery capacity, low pulse output
frequency, seldom use of communication and an operation time/temperature profile of 5% at 0
°C (32 °F), 80% at 15 °C (59 °F) and 15% at 50 °C (122 °F).
The effect of other temperatures is shown in the figure below.
A variation in temperature from 15 °C to 55 °C (59 °F to 131 °F) reduces the capacity by 17%
(in the figure from 15 Ah to 12½ Ah).
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Technical data
10.5 Battery
SITRANS FUS380/FUE380
92 Operating Instructions, 05/2018, A5E00730100-AE