Emerson FB1100 - Low Power Mode; Standard Power Mode

FB1100 Flow Computer Instruction Manual
D301752X012
November 2023
Installation 29
2.10.1 Low Power Mode
The flow computer normally runs in low power mode for typical metering applications.
The radio Power Control function (configurable in FBxConnect) switches the flow
computer into standard power mode at specified times when serial communications are
required, then it reverts to low power mode when the communication period is over.
The local display (HMI module) with FBxWifi communications and FBxWifi uses additional
power. You can configure it in FBxConnect to shut down after a period of inactivity.
Table 2-4. Typical Power Usage – Low Power Mode at Room Temperature
Description
Power Usage (mW) at 6Vdc
Base flow computer with integral
multivariable DP and pressure sensor and
temperature measurement for a single meter
run
Historical configuration supports maximum
of:

4 averages

12 Station 1 history points (Group 4)

10 User Periodic history points (Group 1)
36
Additional Load Options:
Display and backlight active
296
FBxWifi
315
FBxWifi and display active
340
DO active (1 Hz, 50:50 duty cycle, no load)
10
Important
If you increase the number of history points/averages beyond any of the maximum limits
detailed in Table 2-4, the flow computer cannot operate in low power mode and
automatically runs in standard power mode.
2.10.2 Standard Power Mode
When serial communication is active the flow computer operates in standard power
mode. The unit also uses standard power mode when:
 The HMI module display is ON
 FBxWifi is active
 Power control zone enabled