Emerson FB1100 Instruction Manual page 81

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
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:
WARNING
If you exceed these requirements, the FB1100 Flow Computer will not achieve 12 months of
autonomous operation.
Table E-1. Autonomous Mode Requirements
Category
Configuration
Communications
Autonomous Mode Requirements
o C/77 o F; refer to Table E-2.
Feature
Averages
History
Discrete Output
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.
Emerson FB1100 Flow Computer Instruction Manual
Requirements
A total of 4 or less configured averages.
History Group 1 A total of 10 or less configured
(User Periodic 1) history points in History Group 1.
History Group 2 A total of 0 configured history points
(User Periodic 2) in History Group 2.
History Group 3 A total of 0 configured history points
(General History) in History Group 3.
History Group 4 A total of 12 or less configured
(Station History 1) history points in History Group 4.
The discrete output must be disabled (Configure > I/O Setup
> I/O Configuration > Properties Tab > Module Power
Control).
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