MI 2087 Instaltest 61557
Measurement instructions
13
3. Measurement instructions
3.1.
Insulation resistance
There are different objects, where insulation resistance is to be measured, in order to
assure safety against electric shock. Let’s list a few examples:
•
Insulation resistance between installation conductors (all combinations).
•
Insulation resistance of non-conductive rooms (walls and floors).
•
Insulation resistance of ground cables.
•
Resistance of semiconductive (antistatic) floors.
For additional general information concerning Insulation Resistance measurement,
refer to enclosed handbook
Measurements on electric installations in practice and
theory
.
Warnings!
•
Make sure tested object to be deenergised (mains voltage disconnected),
before starting the measurement!
•
When measuring Insulation Resistance between conductors, all loads
must be disconnected and all switches closed!
•
Do not touch tested object while testing it, risk of electric shock!
•
Do not connect test terminals to external voltage higher than 600 V a.c. or
d.c., in order not to damage the test instrument!
•
In case of capacitive test object (capacitive compensation of reactive
power, long tested cable etc.), automatic discharge of the object may not
be done immediately after finishing the measurement. Falling voltage will
be displayed in that case – do not disconnect test leads until the voltage
drops below 50V or carefully discharge the tested object manually!
How to carry out the measurement?
Step 1
•
Connect test cable
(Universal test cable or Tip Commander) to Instaltest 61557.
•
Set function switch to
R
ISO
position, the following menu will be displayed:
Fig. 4.
Insulation Resistance initial menu
