Accuracy of Real-Time Clock ION7650 / ION8650

[sesa243862_brid]

Hi.

Someone knows whats is the accuracy of the Real-Time Clock of ION7650 and ION8650?

I'm looking for this information.

Thanks in advance.

[sesa54412_bridg · Accepted solution]

Hello Diego,

The accuracy of the real-time clock on the ION7650 and ION8650 meters depends on the the setting of the time synchronisation source:

If either meter is set to use its internal crystal for its time source, the meter's clock will drift up to ± 5 ppm and to a maximum of ± 10 ppm.

This means over the course of a day the meter's clock can drift from ~0.43 to 0.86 seconds. 

The actual clock drift will depend on the meter's installation temperature and how much that temperature varies over time.

If either meter is set to use a GPS time synchronisation protocol for its time source, the accuracy will be better than ± 1 msec, independent of the temperature.

In the GPS case, a meter's inputs can be used to accurately time-stamp events in Sequence of Events Recording (SER) applications:

Technical Library - Schneider Electric Schneider Electric

Please let us know if there are any other questions or if there are specific requirements for your application.

Kind Regards,

Chris Ailey