4-
Terminal Cover Tamper Detect
The meter has an optional switch that can detect the opening of the terminal cover. It is
located above and to the left of the terminals (See Figure 4-9). The meter can generate
an EFA alarm and an event in the log when the switch is released by someone opening
the terminal cover. Alternatively it may be fitted to sense when the meter lid is opened,
rather than the terminal cover.
• Figure 4-9 The terminal cover tamper detect switch
Under the Meter Lid
Removing the two sealable screws allows the meter lid to be removed. Generally
connections to the I/O connectors do not need to be detached to allow the cover to be
removed. Removal of the meter lid is required to access the Config Jumper.
Care must be taken as dangerous voltages are present in the circuitry under the meter lid
while the meter is active.
Even when the meter is not powered, care should be taken to prevent electrostatic
damage to the circuitry of the meter.
CT to VT Links
The meter does not have removable CT to VT links. If testing the meter on a test bench,
the test bench must be able to properly handle the permanent VT to CT connection.
Config Jumper
The Config jumper offers a level of hardware security to the meter – the jumper needs to
be fitted to allow calibration and recovery of lost passwords. The jumper is located
under the meter lid, half way up the far right side of the circuit board (Figure 4-10). A
jumper is fitted across the bottom set of pins marked JP1 Config. The top set of pins
marked JP2 FTest are for factory use only.
4-8 EDMI Atlas Hardware Reference Manual
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