Operation Manual

CS 2099 Eurocheck Eurocheck operation
9
4 Eurocheck operation
4.1 Recommended calibration sequence and practice
This chapter lists recommended sequence for calibration of installation test instruments.
It is not obligatory to follow this sequence. Eurocheck offers additional calibration
functions (all functions are explained in detail in the following chapters).
Calibration using universal test cable
Step Calibrated function Purpose
1 LowΩ Determination of measurement accuracy.
Verification of universal test cable wire continuity
(incomplete).
2 Continuity Determination of measurement accuracy.
3 Insulation Determination of measurement accuracy.
Verification of universal test cable wiring insulation
resistance (incomplete).
4 Voltage Determination of measurement accuracy.
Verification of universal test cable or tip commander
wiring continuity and insulation state (complete in most
cases, refer to chapter 4.13).
Calibration using plug cable
Step Calibrated function Purpose
5 Fault loop
impedance
and/or
Trip-lock impedance
Determination of measurement accuracy.
Verification of plug cable wiring continuity (incomplete).
6 RCD trip-out time Determination of measurement accuracy.
For further information on how to perform each measurement with your instrument see
its User manual.
Notes:
q It is advisable to perform at least 3 consecutive measurements to verify stability
of measurement results. Consider accuracy of calibrated function when
evaluating calibration results. Accuracy of each function is defined in User
manual of your instrument.
q If calibration results deviate significantly from reference values, it is very likely the
tested instrument is damaged. Send it to your distributor or manufacturer for
repair and/or readjustment.
q It is a good practice to file results after each calibration. Variation of results over
time period may indicate malfunctioning of the instrument.
q It is best to perform calibrations in similar environment conditions, since changes
of temperature and relative humidity influence test instrument operation and
Eurocheck reference values. In any case note environmental conditions of
calibration when storing measurement results.