Procedure For Measuring Insulation Resistance In Any Mode - Amprobe MultiTest 1000 Manual Del Usuario

4.2.1. Procedure for measuring insulation resistance in any mode

1. Select the desired mode by means of the FUNC key.
2. Connect the black and blue cables to the instrument input terminals T1 and T4
respectively.
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 that is to be submitted to the insulation
test after disconnecting the circuit under test and all the relative loads (see
previous picture).
U
5.
n
DIST
Standard
CEI 64-8/6 Systems up to 500V (Civil installations)
Floor and wall insulation in civil installations
CEI 64-8/4
Floor and wall insulation in systems over 500V
EN60439 Electrical panel boards 230/400V
EN60204 Electrical equipment of machines
CEI 64-4 Floor insulation in medical rooms
Test voltage values and the relative maximum limit values for the most common kinds of test.
If "Measuring" is displayed the instrument is performing 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 capacitance
B1 B2 B3
Insulation between phase and earth in an electrical
installation using untied cables.
By pressing the U
test to be carried out (see table). The values to be selected are:
• 50V (test on telecommunication system)
• 100V
• 250V
Brief description
Systems SELV or PELV
Systems over 500V
M
B4
key select the test voltage suitable for the type of
n
• 500V
• 1000V
Test voltage
250VDC
500VDC
1000VDC
500VDC
1000VDC
500VDC
500VDC
500VDC
WARNING
Maximum limit value
> 0.250MΩ
> 0.500MΩ
> 1.0MΩ
> 50kΩ (if V<500V)
> 100kΩ (if V>500V)
> 230kΩ
> 1MΩ
<1MΩ (if the floor is at least 1 year old)
<100MΩ (if the floor is at least 1year old)