Availability on the Meter Front Panel

ION 7500 / ION 7600 User’s Guide	Availability on the Meter Front Panel

The following power availability values display on the meter’s front panel, and are viewable in the Vista™ component of ION Enterprise™ or ION Setup™ software:

Number of Nines: the number of consecutive nines that appear in the most- significant digits of the availability value (e.g. “10” on the front panel indicates 10 nines: 99.99999999).

Availability-ppm: the fraction of time that the power is available, in parts per million (ppm).

Evaluation Time (days): the number of days that have elapsed since the calculation was last reset. This gives an indication of the time interval over which the availability calculation is made.

The availability framework is found at this location within Designer: Advanced

Setup\Power Quality Framework\Power Availability Framework.

Sample Availability Framework Behaviors

Scenario 1: blade powered meter + power system outage

The Sag/Swell total disturbance time includes the outage. The meter downtime from the diagnostics module is added to the meter uptime to account for the total time of observation.

Scenario 2: blade powered meter + meter decommissioned

The Sag/Swell module logs the downtime as disturbance time. When the meter powers back up, the meter downtime from the diagnostics module is added to the meter uptime.

Scenario 3: auxiliary powered meter + power system outage

The Sag/Swell total disturbance time includes the outage. The meter never loses power, which means that there is no meter downtime and the meter uptime is equivalent to the total time of observation.

Scenario 4: auxiliary powered meter + meter decommissioned

The Sag/Swell module does not log a disturbance time. When the meter powers back up, the meter downtime from the diagnostics module is added to the meter uptime.

Assumptions

The above scenarios assume that:

1.The auxiliary powered meter assumed the power system was within specs during a meter down time if it didn't detect a disturbance prior to powering down.

2.The Sag/Swell module is configured correctly to monitor voltage disturbances.

3.The Sag limit is set above the voltage level at which the meter starts powering down.

Power Availability Technical Note

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7500, 7600 specifications

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Multi-Tech Systems 7500, 7600 manual Availability on the Meter Front Panel, Assumptions

Models: 7500 7600

ION 7500 / ION 7600 User’s Guide