User's Manual

Operation: CVSO OpenWay Register

44 CENTRON® OpenWay™ Meter Technical Reference Guide

Power Outage

The D/T/L Register flags an interval when a power outage exceeds a specified number of

seconds. The range for power outage length is programmable from 0 to 255 seconds and

must not exceed the programmed interval length.

 During power outages the CENTRON OpenWay meter maintains all meter data as well

as timekeeping functions.

 During an outage, billing data is stored in non-volatile memory.

 When power is restored, data is returned to active memory and normal metering

resumes.

 The meter records the date and time of the power outage and the power restoration (for

meters with batteries).

Channel Configuration

The D/T/L Register can be programmed to have one to eight channels of interval load

profile data. Each channel corresponds to an energy register selected during the

programming process. In order to load profile an energy, the energy must first be selected

as a quantity to be measured.

Selection of channel configuration and pulse constants is accomplished through the

programming software. Each data channel is programmed to record load profile data from a

user-selected register. The energy registers allowed for load profile are listed in Energy

Data.

Pulse Constants

For each load profile channel, the pulse constant is programmable from 0.01 to 10 unit

hours per pulse in 0.01 increments. The load profile pulse constants apply to secondary

readings only.

Example: Calculation of pulse weight from kWh

A meter, 3-element, 120 Volts, CL20 is programmed to record kWh in load profile with 15

minute intervals.

First, calculate the maximum watthour accumulation during 15 minute intervals:

)25.0()3()20()120(max hoursXphasesXAXVWh =

watthoursWh 800,1max =

The maximum number of pulses is 65,535; therefore, the smallest pulse weight (PW) that

can be used is:

0275.0

535,65

1800

min ==

Draft