Security Mechanisms 9300 Series User’s Guide
Page 140 Chapter 6 - Revenue Metering
Anti-Tamper Seals
The revenue meter incorporates one or two sealing cans through which traditional
lead/wire seals can be inserted. When utilized, these lead/wire seals effectively
prevent unauthorized personnel from gaining access to meter internals. These seals
are provided with the meter, and are installed as follows:
1. Place the sealing can over one of the rear panel corner holes and insert the
screw into the hole through the sealing can.
2. Insert the ball bearing into the sealing can over the head of the screw. Install the
wire through the two holes in the sealing can.
3. Twist the wire and crimp the lead-sealing tab onto the wire.
Password Protected Min/Max Register Resets
The meter front panel incorporates a password that must be entered in order to
reset any of the minimum/maximum register values. The password must therefore
be used to reset peak demand register values.
Hardware-based Security
The revenue meter is equipped with a comprehensive security system that provides
protection against unauthorized alteration or tampering of revenue-related
quantities. This security system locks all revenue-related ION modules, ION links
and ION setup-registers. Basic meter configuration parameters including volts
mode (service-type), PT ratio, and CT ratio are locked. These locks are automatically
enabled (at the factory) for all sealed revenue meters. Typical values that are
protected include:
kWh, kVARh, kVAh delivered, received, del-rec, del+rec
kW, kVAR, kVA Thermal and Sliding Window demand min and max values
Digital Outputs controlling the energy pulsing applications
All Power system settings, including PT an CT ratios
A two-pin jumper block is used to enable and disable the hardware security as
described in the next section.