Amprobe MEGATEST-1000 Megohmmeter - Manual (Page 29)

Procedure for insulation resistance measurement referring to the previous picture:
Switch situation Point under test Measurement result
Judgement of an
installation
Se R ≥ R
LIMITE
☺ OK (end of the test)
1
Turn the switch A,
l D and E off
Take the measurement
on switch A
Se R < R
LIMITE
Proceed 2
Se R ≥ R
LIMITE
Proceed 3
2
Turn the switch B
off
Take the measurement
on switch A Se R < R
LIMITE
INSTALLATION
NOT COMPLYING
WITH STANDARDS
Se R ≥ R
LIMITE
☺ OK (end of the test)
3
Take the measurement
on switch B Se R < R
LIMITE
Proceed 4
Se R ≥ R
LIMITE
Proceed 5
4
Turn the switch C
off
Take the measurement
on switch B Se R < R
LIMITE
INSTALLATION
NOT COMPLYING
WITH STANDARDS
Se R ≥ R
LIMITE
☺ OK (end of the test)
5
Take the measurement
on switch C Se R < R
LIMITE
INSTALLATION
NOT COMPLYING
WITH STANDARDS
Table1: Table with procedure steps for insulation measurement referred to the
installation reported in Errore. L'origine riferimento non è stata trovata.
Note The switches D and E are those installed near the load having the purpose of
separating it from the installation. In case the above said RCDs do not exist it is
necessary to disconnect the users from the before making the insulation resistance
test.
ATTENTION:
If the installation includes electronic devices, disconnect them from the installation and
in case this is impossible only the test "a" is to be effected, that is to say between
active conductors (which in this case SHALL be connected together) and the earth.
28