Operation Manual

CS 2099 Eurocheck Eurocheck operation

Figure 4.5: Performing voltage and frequency calibration using universal test cable

4.13 Continuity and insulation of measurement leads

verification

Continuity of measurement leads

Continuity of universal test cable measurement leads could be verified by voltage

calibration between all 3 installation wires (between L and N, L and PE, N and PE).

Refer to chapter 4.12 for more information. If the tested instrument measures voltage of

around 0 V, at least one of connected leads is broken. By connecting different

measurement lead pairs it is possible to determine which one is broken.

Complete verification can be performed with universal test cable only. Other types of

measuring cables (plug cable, plug commander and tip commander) can be verified

indirectly. First verify universal test cable using procedure for voltage and frequency

calibration (see chapter 4.12). Measure voltages between all measurement lead pairs. If

all results pass, perform any of calibrations using different Eurocheck sockets and

universal test cable. At last perform these calibrations with the other type of cable and

compare the results. If they’re the same or close to each other, the other cable is

acceptable as well.

Notes:

q Suggested calibrations for verifying continuity of plug cable and plug commander

are fault loop (verification of L and PE) and line impedance (verification of L and

N).

q Suggested calibration for verifying continuity of tip commander is low resistance

measurement.

q For quick continuity verification of L and N wires of universal test cable perform

low resistance calibration with any reference value (see chapter 4.11).