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national multiple family submetering and allocation billing program ...

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- Meters must demonstrate in testing that errors of registration are not introduced by low<br />

battery voltage.<br />

- Batteries should issue an accurate measurement or none at all<br />

- A “window of warning” can <strong>and</strong> should be designed into the circuit board that would<br />

provide the required notification; also, the unit can be designed to shut down altogether<br />

when voltage drops below a pre-determined threshold<br />

- ASME A112.4.7, paragraph 2.3, provides for a 5-year life <strong>and</strong> a 3-month warning.<br />

- AWWA specifies a 15-year battery life<br />

- If there is a warning, then there must be some specification as to who receives the<br />

warning signal; “display criteria” are needed or the signal should feed into a recording<br />

system.<br />

- ASME A112.4.7 states that there shall be an “external indication.”<br />

- Complete shut-down of data transmission due to low voltage means no charges would be<br />

made to the responsible party <strong>and</strong>, as such, the failure of the battery would get attention.<br />

The immediate response by the owner or manager to such a situation, however, would<br />

likely be to create an “estimated bill” for as long as the law allows, which is essentially<br />

forever in all but three states that do not allow utility cost <strong>allocation</strong> (Delaware,<br />

Mississippi, <strong>and</strong> North Carolina) the meter output (reading) should be visible to the<br />

property owner, the dwelling unit occupant, <strong>and</strong> the <strong>billing</strong> company.<br />

- A shorter battery life means that the device needs to be replaced more frequently with the<br />

cost being incurred by the meter manufacturer.<br />

- We are proposing a technical st<strong>and</strong>ard <strong>and</strong> the state <strong>and</strong> local jurisdictions should deal<br />

with <strong>billing</strong>, etc.<br />

Conclusions based upon committee’s comments:<br />

The battery should have a minimum life of 5 years <strong>and</strong> provide for a 3-month low battery<br />

signal as currently specified in the ASME code. However, there needs to be a requirement that<br />

the data is not compromised due to low voltage: data needs to be deterministic--either<br />

transmitted correctly or not at all.<br />

Visible Meter Reads<br />

Committee member comments:<br />

- Cell phones don’t have visible “meters” to show how many minutes have been used;<br />

technology is taking us away from visible meter reads; technology permits current<br />

reading to always be obtained.<br />

- Having the data displayed on a computer console (instead of the meter itself) is OK,<br />

but the data:<br />

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