Contrel EMA11, User Manual, Page: 15 / 58

EMA11 - USER MANUAL
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5) INTERNAL BATTERY
To avoid to lose the setup and all storing data, the instrument is equipped of an internal battery
(CR2450).
5.1) REPLACEMENT INTERNAL BATTERY
Only a qualified and authorized technical person can change the internal battery.
This operation will delete all storing data and it will restore the default setup with the exception of the
password and the code to enable the harmonics and time bands. Using the software NRG (or relative
serial commands) it’s possible to download all storing data to avoid to losing same.
The next figure shows where is located the battery inside the instrument.
Instruction to change the internal battery:
1) It’s necessary to cut off the power supply of instrument and to disconnect all inputs and all outputs.
2) Remove the seal from the rear door.
3) Open and remove the rear door.
4) It’s necessary to pay attention to presence of residual voltage inside the instrument. Extract the
battery circuit without touching any other component.
5) Change the battery. Put the positive pole in the upper direction.
6) Plug in the circuit with the new battery (in the upper directions) inside the instrument. The 4 pin
strip must meet with their relative support.
7) Mount the rear door again and close it. Restore all the connection and turn on the instrument.
8) In the Warnings page is possible to check the condition of battery (BATTERY OK).
L
N
Extractible Pin strip
Battery
Conctat Battery