Mettler Toledo 322859 HMI Keypad Front Overlay Touchscreen

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The integrity of the power ground is important for safety and dependable operation of the Mettler Toledo 322859 Protective Film Membrane Keyboard Touch Screen Monitor terminal and its associated scale base. A poor ground can result in an unsafe condition if an electrical short develops in the Mettler Toledo 322859 Touch Digitizer Glass Operator Panel Keypad Front Overlay equipment. A good ground connection assures extraneous electrical noise pulses are minimized. The power line for the Mettler Toledo 322859 Switch Membrane Front overlay Touch Panel scale must not be shared with equipment such as motors, relays, or heaters that generate line noise.

To confirm ground integrity, a commercial branch circuit analyzer like an ICE model SureTest ST-1D (or equivalent) is recommended. This instrument uses a high amperage pulse to check ground resistance. It measures the voltage from the neutral wire to the ground connection and will provide an assessment of the line loading.

Instructions with the instrument provide guidelines about limits that assure good connections. Visual inspections and a query of the user will provide information about equipment sharing the power line. If adverse power conditions exist, a dedicated power circuit or power line conditioner may be required.