D-4 620UK METAL CHASSIS DESCRIPTION
The AMPTEC 620UK Ohmmeter chassis (case) is an aluminum enclosure that also acts as a Faraday cage
surrounding the unit's internal electronics. The Chassis (enclosure) has a front panel earth/ground jack which
enables it to be earthed to the same electrical potential as the equipment which the product will be testing.
Internal AMPTEC 620UK Ohmmeter earthing connects all rear panel, battery compartment, PCBs and front
panel aluminum shield behind the front panel labeling, are connected to the chassis and chassis ground front
panel jack.
In summary, the AMPTEC 620UK Ohmmeter front and rear panels are aluminum shielded and have their
individual chassis ground lug connections electrically wired to the units front panel “chassis” ground front panel
connection.
The chassis is optionally fitted with tamper resistant screws (snake eye type) to ensure that only authorized
access is possible. A special screwdriver is required to gain access to the internal electronics and battery
compartment.
The AMPTEC 620UK Ohmmeter is supplied with a carrying case that is made of a durable water resistant
material coated with a permanent conductive (anti-static) protective layer to prevent electrostatic discharge. An
earth connection is made from the AMPTEC 620UK Ohmmeter to the Carrying Case. This is shown in the
photograph on page 13.
a)
b)
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