California Code of Regulations › Title 4 - Business Regulations › Division 9 - Division of Measurement Standards, Department of Food and Agriculture › Chapter 1 - Tolerances and Specifications for Commercial Weighing and Measuring Devices › Article 2.2 - Electric Watthour Meters › Section 4027.2 - S. Specifications

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
S.1.
				  Metrological Components. A meter system shall be designed and constructed so
				  that metrological components are adequately protected from environmental
				  conditions likely to be detrimental to accuracy. Components shall be designed
				  to prevent undetected access to adjustment mechanisms and terminal blocks by
				  providing for application of a physical security seal or an audit
				  trail.
S.2. Terminals. The
				  terminals of the meter shall be arranged so that the possibility of short
				  circuits while removing or replacing the cover, making connections, or
				  adjusting the meter, is minimized.
S.3. Provision for Sealing.
S.3.1. Sealing. Provisions shall be made for
				  applying a security seal in a manner that requires the seal to be broken, or
				  for other approved means of providing security (e.g. audit trail available at
				  the time of inspection), before an adjustment can be made that affects the
				  metrological integrity of the meter. The audit trail shall use the format set
				  forth in Table S.3.1.
Table S.3.1. Categories of
								Device and Methods of Sealing
Category of
								Device
Method of
								Sealing
Category 1: No remote configuration capability.
Seal by physical seal or two event counters: one for
							 calibration parameters and one for configuration parameters.
Category 2: Remote configuration capability, but access
							 is controlled by physical hardware.
The hardware enabling access for remote communication
							 must be on-site. The hardware must be sealed using a physical seal or an event
							 counter for calibration parameters and an event counter for
The device shall clearly indicate that it is in the
							 remote configuration mode and record such message if capable of printing in
							 this mode or shall not operate while in this mode.
configuration parameters. The event counters may be
							 located either at the individual measuring device or at the system controller;
							 however, an adequate number of counters must be provided to monitor the
							 calibration and configuration parameters of the individual devices at a
							 location. If the counters are located in the system controller rather than at
							 the individual device, means must be provided to generate a hard copy of the
							 information through an on-site device.
Category 3: Remote configuration capability access may
							 be unlimited or controlled through a software switch (e.g., password).
An event logger is required in the device; it must
							 include an event counter (000 to 999), the parameter ID, the date and time of
							 the change, and the new value of the parameter. A printed copy of the
							 information must be available through the device or through another on-site
							 device.
The device shall clearly indicate that it is in the
							 remote configuration mode and record such message if capable of printing in
							 this mode or shall not operate while in this mode.
The event logger shall have a capacity to retain
							 records equal to ten times the number of sealable parameters in the device, but
							 not more than 1000 records are required. (Note: Does not require 1000 changes
							 to be stored for each parameter.)