Instruction manual

NGA 2000 MLT Hardware
REMOVAL / REPLACEMENT OF COMPONENTS
12 - 4
Emerson Process Management GmbH & Co. OHG
Instruction Manual
90002929
07/2006
12.3.2 Replacement of Buffer Battery
Use the following procedure to replace the battery:
❍ Remove the ACU 02 (see 12.3.1).
❍ Remove the jumper “P23” (ACU02) or “P17” (ACU 01) for battery buffer (Fig. 12-1).
All data and compensation values entered by the user will be deleted (RAM-fail)!
❍ Unsolder the battery from the soldering pins (see Fig. 12-1).
❍ Solder the new battery (Ordering No. 03 765 180) to the soldering pins (see Fig. 12-1).
Verify polarity when soldering the new battery (Fig. 12-1) !
Do not short circuit battery !
After the replacement:
❍ Re-insert the jumper for battery buffer (Fig. 12-1).
❍ Install the ACU 02 (see 12.3.3).
12.3.3 Installation of ACU 02
❍ Tilt the card ejector of the ACU 02 upwards and put in the card until the catch locks into
place.
❍ Re-attach the cable (ACU 02 - AFP 01 connection) to the circuit board ACU 02.
❍ Close the instrument (i.e., re-attach the front panel, see section 15.).
❍ Switch on instrument.
Now all the data required by the user can be entered again, e.g. system parameters.
REPLACEMENT OF BUFFER BATTERY OF ACU 02