Direct acting indicating analogue electrical measuring instruments and their accessories title - Part 4: Special requirements for frequency meters
|Publication Date:||1 August 2018|
|ICS Code (Measurement of electrical and magnetic quantities):||17.220.20|
This part of IEC 60051 applies to direct acting indicating analogue frequency meters of the following types:
• pointer-type frequency meters (as defined in 3.2.11 of IEC 60051-1:2016);
• vibrating-reed frequency meters (as defined in 3.2.12 of IEC 60051-1:2016).
This document also applies to non-interchangeable accessories (as defined in 3.1.23 of IEC 60051-1:2016) used with frequency meters.