FB1100 Flow Computer Instruction Manual
D301752X012
November 2023
Autonomous Mode Requirements 65
Appendix E: Autonomous Mode Requirements
The FB1100 Flow Computer operating in “autonomous mode” runs off a single battery
for up to 12 months without recharging. The 12-month battery life is based on the
FB1100 running in low power mode on a typical remote application with a local collection
of history and use of the optional display for up to 30 minutes per month. This
configuration makes the FB1100 an ideal replacement for chart recorders, significantly
reducing measurement uncertainty and providing a complete electronic audit trail. The
12-month battery life is achieved under an ambient temperature of 25
o
C/77
o
F; refer to
Table E-2.
The solar powered option provides up to 25 days of autonomous operation without
charge.
To achieve 12 months of autonomous operation, you must configure the FB1100 Flow
Computer to meet the following requirements:
If you exceed these requirements, the FB1100 Flow Computer will not achieve 12
months of autonomous operation.
Table E-1 Autonomous Mode Requirements
A total of 4 or less configured averages.
History
History Group 1
(User Periodic 1)
A total of 10 or less configured
history points in History Group
1.
(User Periodic 2)
A total of 0 configured history
points in History Group 2.
(General History)
A total of 0 configured history
points in History Group 3.
History Group 4
(Station History 1)
A total of 12 or less configured
history points in History Group
4.
Discrete
Output
The discrete output must be disabled (Configure > I/O
Setup > I/O Configuration > Properties Tab >
Module Power Control).
Communications
Limit communications via the LCD, FBxWifi™, or serial ports to 30
minutes per month or less. Usage exceeding 30 minutes per month
impacts the life of the battery.
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