HT instruments MACROTEST 5035 - Manual (Page 16)

MACROTEST 5035
EN - 15
4.2. M Ω: INSULATION RESISTANCE WITH TEST VOLTAGE OF 50V, 100V,
250V, 500V OR 1000V
The measurement is effected according to EN 61557-2 and VDE 0413 part 1.
CAUTION
Before effecting the insulation test make sure that the circuit under test is not
energized and all the relative loads are disconnected.
Turn the switch on M Ω position.
Switch on the instrument.
The key FUNC permits to select one of the following measuring modes
(which can be shown cyclically when pressing the key):
Mode MAN (minimum test time of 10 seconds or set by the pressing
duration on the
START/STOP key). Recommended test.
Mode
TIMER (test duration depending on the selected interval (from 10
to 999 seconds). This test can be effected in case a minimum measuring
time is required.
4.2.1. Procedure to measure insulation resistance in any modes
1. Select the desired mode by means of the
FUNC key.
2. Connect the black and blue cables to the instrument input terminals
B1 and B4
respectively.
B2 B3 B4 B1
M
Insulation between phase and earth in an electrical
installation using untied cables.
B2 B3 B4 B1
P
Insulation between phase and earth in an
electrical installation using the shuko cable.
3. If the cables supplied with the instrument are not long enough for the measurement you can
extend the blue cable.
4. Connect the instrument terminals to the object which is to be submitted to the insulation
test
after disconnecting the circuit under test and all the relative loads (see
previous picture).
5. By
means of
U
n
/I
∆n select the test voltage suitable for the type of test
to be carried out (see table). The values to be selected are 50, 100,
250, 500, 1000V DC
FUNC
U
n
/I
∆n
DIST