WECO 9000

The WECO 9000 began as a RADIAN Innovate™ Custom Design Solution. Process improvement workshops RADIAN has facilitated at utilities found AMI meter testing pass yields as low as 65%. Typical failures were basic: an inoperable display, diagnostic errors, a disconnect switch left open, the wrong firmware version, or a meter that could not register on the communications network.

The WECO 9000 catches these problems first, so your accuracy Test Boards spend their time on accuracy testing.

Integrated meter detection and a safety interlock at each socket keep empty sockets unpowered. This dead-front design removes the need for meter blanks on unused sockets.

Each vertical bank of four sockets is isolated, with its own power switch, circuit breaker, and LED power status above each socket, so operators can change meters without powering down the whole board. There is no energy reference standard or current source in this solution.

All three boards power meters on a roll-around cart before accuracy testing. The WECO 9000 and WECO 9050 apply voltage for AMI functional screening, such as power-up, display, communication, and disconnect checks. The WECO 9200 adds variable current, so meters run under load.

None of the three boards includes an energy reference standard. On the WECO 9200, source adjustment accuracy depends on the ammeter and voltmeter accuracy. On the WECO 9000 and WECO 9050, voltage is tied to line voltage through transformers. On all three, differential losses due to multiple meter loading also apply.