Removing/Replacing The Sram Battery - Emerson FB1100 Instruction Manual

4.6

Removing/Replacing the SRAM Battery

A lithium coin cell battery provides backup power for the SRAM and the real time clock. The SRAM
backup battery can last for up to 10,000 hours of cumulative operation and runs only if the main
power system fails. In a non-hazardous area, you do not need to power down the unit to replace
the SRAM backup battery.
Important
If the unit is ever powered down without the SRAM battery installed, SRAM data is lost. Always back
up your data before you remove the SRAM battery if you know that main power will also be off.
Important
Replacement SRAM backup batteries must be Rayovac® Model BR2335.
DANGER
Ensure the flow computer is in a non-hazardous area. Never remove end caps in a hazardous area.
DANGER
Do not disconnect equipment unless power has been removed or the area is known to be non-
hazardous.
DANGER
EXPLOSION HAZARD: Substitution of any components may impair suitability for Class I, Division 1
or Class I, Division 2.
DANGER
EXPLOSION HAZARD: Do not replace batteries unless power has been switched off or the area is
known to be non-hazardous. Batteries must only be changed in an area known to be non-
hazardous.
1.
2.
3.
4.
Service and Troubleshooting
Remove the retaining clamp from the front end cap (if present). (See
Remove the front end cap.
Remove the HMI module.
Grasp the coin cell battery and remove it from its slot.
Emerson FB1100 Flow Computer Instruction Manual
D301752X012
August 2020
Section 2.6.1)
59