HT instruments MACROTEST 5035 - Manual (Page 17)

MACROTEST 5035
EN - 16
Standard Brief description Test voltage Maximum limit value
CEI 64-8/6
Systems SELV or PELV
Systems up to 500V (Civil installations)
Systems over 500V
250VDC
500VDC
1000VDC
> 0.250M Ω
> 0.500M Ω
> 1.0M Ω
CEI 64-8/4
Floor and wall insulation in civil installations
Floor and wall insulation in systems over 500V
500VDC
1000VDC
> 50k Ω (if V<500V)
> 100k Ω (if V>500V)
EN60439 Electrical panel boards 230/400V 500VDC > 230k Ω
EN60204 Electrical equipment of machines 500VDC > 1M Ω
Test voltage values and the relative maximum limit values for the most common kinds of test.
CAUTION
If “Measuring” is displayed the instrument is effecting the measurement.
During this phase do not disconnect the test leads as the circuit under test
may remain charged at a dangerous voltage due to the parasite capacities of
the installation. Independently of the working mode selected the instrument
throws a resistance in the output terminals at the end of each test to
discharge the parasite capacities of the circuit.
4.2.1.1. Mode
"MAN"
6. Press the START/STOP key.
The instrument effects the test lasting:
Minimum 6 seconds in case the key is pressed and released within 5 seconds.
Until the key is released for all the other cases.
At the end of the test, in case the
resistance value R
ISO
detected results
to be lower than R
MAX
(depending on
the selected voltage see following table)
and the test is effected at the
selected rated voltage value, the
instrument emits a
double sound
signal indicating the positive
outcome of the test displays one
screen similar to the screen alongside.
R
ISO
1.00
M Ω
500 V 20
s
MAN
The values of measured resistance of isolation always must be confronted with the
normative limits (see table) for being able to assert if the system is to norm.
SAVING: The test can be stored pressing the SAVE key twice
(according to paragraph 5.1).
Rated voltage value
selected for the test.
Test duration.
In this case the
START/STOP
key has been
pressed for 20
seconds.
Manual mode.
SAVE
R
ISO
insulation
resistance value
.
START
STOP