Gossen Metrawatt M516M Electrical Tester, 1000V , Earth Resistance Measurement With RS232

The Gossen Metrawatt test instrument is versatile all in one test instruments for use in AC and DC networks for market compliant testing of the effectiveness of protective measures at electrical systems or installations, electric machines, PV systems and electric charging stations. It can also be used for high voltage testing. It is ideal for installation, initial startup, periodic testing and troubleshooting.

Phase sequence testing
Measurement of insulation resistance RINS
Measurement of residual voltage without tripping the RCD
Measurement of tripping current with ramp function