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Instruction Manual
D103621X012
4320
January 2018
58
Replacing the Magnetic Feedback Assembly
To remove the magnet assembly from the actuator stem, perform the following basic steps.
1. Remove the 4320 from the actuator.
2. Remove the screws holding the magnet assembly to the connector arm.
Install the new magnet assembly per the appropriate Installation/Mounting procedure. Once the instrument is
mounted, perform the calibration routine before putting back in to service.
Replacing the Power Module
WARNING
Personal injury and property damage can result from fire or explosion if the power module, which contains two
lithiumthionyl chloride (LiSOCl
2
) batteries, is subjected to heat above 100
_
C (212
_
F). Power modules should be stored in a
cool, dry and ventilated area; for maximum life, storage should not exceed 30
_
C (86
_
F).
Note
The batteries contained in the field replaceable power module are not rechargeable. Contact your
or Local
Business Partner if a replacement power module is required.
When operating in temperatures between -10
_
C (14
_
F) and -20
_
C (-4
_
F) it is recommended that you use the extended power
module, as power module life is impacted. The life expectancy of an extended life power module used continually in the -10
_
C
(14
_
F) and -20
_
C (-4
_
F) range is 3 years.
Note
Proper disposal of used power modules, which contain two lithiumthionyl chloride (LiSOCl
2
) batteries, is required. Disposal
should be done in accordance with applicable federal, state, and local rules and regulations.
For additional information refer to the manufacturers guidelines for disposal of lithium batteries:
http://www.tadiranbat.com/assets/0111_-_guidelines_for_disposal_of_lithium_cells_and_batteries.pdf (available at
www.tadiranbat.com).
Removal
Refer to figure 5.
1. Loosen the two instrument cover screws and open the cover.
2. Remove the four screws providing the mechanical connection to the housing.
3. Disengage the power module from the banana plug connectors on the main board.
4. Remove the power module.
Installation
Refer to Installing Standard and Extended Life Power Modules on page 10. Recalibrate the instrument before putting it
back into service.