ratcheting cyclometers [RE-wrenches]

[Todd Cory, Mt. Shasta Energy Services]

As a part of the litigation the California PUC did on my behalf against
PacifiCorp I researched my home's analog bidirectional meter. I wrote the
manufacturer and they said it reads with the same accuracy,  forwards and
backwards. See below.

Todd

Subject:  RE: specification sheet needed
Date: Thu, 14 Jun 2001 11:45:57 -0400
From: "Sales, Hugh" <Hugh.Sales at ptd.siemens.com>

Hello,

Attached is the most recent test data for the class meter you reference.  As

you can see, the difference between forward and reverse registration is
statistically insignificant.  The meter is designed to accurately measure
energy in either direction.

Hugh Sales
Marketing Manager
Siemens PT&D - Meter Division

-----Original Message-----
From: Todd Cory [mailto:toddcory at jps.net]
Sent: Wednesday, June 06, 2001 9:17 AM
To: contact at lg-co.com; info at landis-gyr.com; sales at combustioncontrol.com;
hugh.sales at ptd.siemens.com
Subject: specification sheet needed

Hello,

I have a Landis & Gyr analog kWh meter on my house and I would like to
receive the specification sheet for it. I am specifically needing
information on this meters accuracy when running "backwards" in a net
metering application. My utility is claiming they question it accuracy
when operating in this mode and I would like to see the specifications
to substantiate that ascertain.

My meter has these numbers on it:

Rr 13 8/9
Landis & Gy
Lafayette Indiana
244
240 3W  Type MS II Kh 7.2
200 CL Form 2S TA30
Single Stator Watthour Meter


Thanks in advance for your help with this request.

Sincerely,

Todd Cory
P.O. Box 689
Mt. Shasta, CA 96067
(530)926-1079





Doug Pratt wrote:

> (side note: it has recently come to my attention that many meters,
> particularly older standard clockwork meters like many of us have been
> buying rebuilt, do not register accurately when running backwards. The
> designers never envisioned these meters would run any direction but
> forward. I had an intertie customer in Healdsburg who recently got two
> months worth of free electricity credit and a new meter from his
> utility. I don't have details, and we'll probably hear more about this,
> but for now...heads up guys! Don't always trust those older meters.)
>
> Regards,
> Doug Pratt

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