Emerson FB1100 Flow Computer Instruction Manual
D301752X012
August 2020
Autonomous Mode Requirements
77
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:
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
Feature
Requirements
Configuration Averages
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.
History Group 2
(User Periodic 2)
A total of 0 configured history points
in History Group 2.
History Group 3
(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.
Summary of Contents for FB1100
Page 14: ...Emerson FB1100 Flow Computer Instruction Manual D301752X012 August 2020 10 Introduction ...
Page 48: ...Emerson FB1100 Flow Computer Instruction Manual D301752X012 August 2020 44 Installation ...
Page 87: ...Emerson FB1100 Flow Computer Instruction Manual D301752X012 August 2020 Index 83 ...