User's Manual

vii
Warning
The use of I/O cables in ungrounded services could cause serious personal injury,
property damage, and/or death
The
FOCUS does not have an auto-ranging power supply. Care should be taken to ensure that
meters are installed correctly, matching meter form and voltage with the installation.
Published Specifications
The Focus kWh is designed in accordance with the specifications listed below.
Institute for Electrical and Electronic Engineers (IEEE)
• IEEE Recommended Practice on Surge Voltages in Low-Voltage AC Power Circuits-C62.41-1991
American National Standards Institute (ANSI)
• American National Standard Code for Electricity Metering, ANSI C12.1-2001
• American National Standard for Watt-Hour Meters, ANSI C12.10-1997
• American National Standard Method of Salt Spray (Fog) Testing, ANSI/ASTM B117-73, (Z
118.1-1974)
• American National Standard for Electricity Meters 0.2 and 0.5 Accuracy Classes, ANSI C12.20-2002
Underwriters Laboratories (UL)
• Underwriters Laboratories UL 746C, “Polymeric Materials – Electrical Equipment Evaluations,”
December 27, 1995.
Canadian Specifications
• National Standard of Canada, "Specifications for Approval of Type of Electricity Meters, Instrument
Transformers and Auxiliary Devices", CAN3C17M84
• Ontario Hydro, "Oscillatory Transient Interference Immunity Test", A-28M-82
• Canadian Standard for Terminal Equipment, Terminal Systems, Network Protection Devices,
Connection Arrangements and Hearing Aids Compatibility, CS-03
Industry Canada
This Class B digital apparatus meets all requirements of the Canadian Interference Causing
Equipment Regulations.
Operation is subject to the following two conditions: (1) this device may not cause harmful
interference, and (2) this device must accept any interference received, including interference that
may cause undesired operation.
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