MC³ 24.96.EX O&M Manual Page 1 08/14/01 4:34 PM/LDD
INTRODUCTION
SAFETY
The Merrick MC³ Controller is used for the monitoring and control of process weighing equipment.
To insure personnel safety please read the following instructions and precautions carefully.
In General
1. Observe all standard precautions that pertain to moving machinery.
2. Observe all standard precautions that pertain to electrical drives and electrical controls.
3. Pay particular attentions to special notes and precautions that appear throughout this
manual.
4. Please read and familiarize yourself with this entire manual before attempting service or
repair of the Merrick MC³ Controller. If you have any questions or problems please call
the Merrick Service Department for assistance.
Electrical Precautions
1. Before undertaking work on the electrical system, the drives, or the Controller, open
main disconnect switches and lock boxes. Work should never be performed on the
Controller with power on the unit. It is recommended to disconnect the power cord from
the panel mount style controller or switch off the main power in a wall mount before
attempting any service procedure.
2. Verify that all grounds that are called for on the wiring diagrams are in place and are
securely connected. Proper grounding not only helps insure your personal safety, but
also is necessary for the proper operation of the controller.
3. If it is necessary that you must work in or near areas of live high voltage always keep
one hand clear of the machine, the cabinet, or any other conductors to avoid the
possibility of electrical shock traveling across your chest. NEVER undertake any
electrical work in areas with wet or flooded standing areas.
4. NEVER impair or disable the function of a fuse.
IF YOU ARE IN DOUBT ABOUT ANY PROCEDURE, CONTACT THE MERRICK SERVICE
DEPARTMENT. SEE Technical Support ON PAGE 2
MANUAL CONVENTIONS
NOTE: Any additional information that may be useful follows the note marker.
CAUTION: Be careful, certain settings may cause problems.
WARNING: Follow the directions prescribed in the warning. Serious problems can occur if the
recommendations are not followed.
Buttons
Button graphics will be shown to the left of the corresponding information regarding the
function for the button.
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