MZC-304
– USER MANUAL
6
2.5 Measurement of voltage and frequency
Set the rotary switch in the
U,f
position.
Read the result of
measurement: the
voltage on the sec-
ondary display field,
the frequency on the
principal.
2.6 Checking correctness of PE (protective earth) connections
or
PE
Note:
WARNING:
When a dangerous voltage is detected on PE conductor, measurements must be immedi-
ately stopped and a fault in the installation must be removed.
- The person making a measurement must ensure that he/she is standing on a non-insulated floor
during the measurement; otherwise the result of the measurement may be incorrect.
- The threshold value, which triggers the signal of exceeded allowable voltage on PE conduit, is ap-
proximately 50 V.
When the meter is connected as in the the dra-
wing, touch the contact electrode with your finger
and wait for about 1 second. When voltage if fo-
und on
PE
, the meter displays the symbol (er-
ror in the installation; PE connected to the phase
conductor) and generates a continuous audio si-
gnal. This option is available for the
Z
L-PE
mea-
surements.
