MI 2087 Instaltest 61557
Measurement instructions
20
3.3. Continuity of protective conductors
Continuity of protective conductors is to be measured, before mains voltage is
connected to tested installation (new or adapted installations). Max. allowed
resistance value depends on power of connected loads, used installation system (TN,
TT) etc.
For additional general information concerning Continuity measurement, refer to
enclosed handbook
Measurements on electric installations in practice and
theory
.
Warning!
•
Make sure tested object to be deenergised (mains voltage disconnected),
before starting the measurement!
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
±±±±
200mA
position, the following menu will be displayed:
Fig. 12.
Continuity of protective conductors initial menu
Step 2
•
Set
High Limit Resistance Value
. Later will test results be compared with the
set limit value and, if higher, they will be equipped with
“!”
mark.
How to set the High Limit value?
•
Press the
SELECT
key, to enter “High Limit adjustment menu”; see the figure
below.
C
9
.........Resistance of test leads has
been compensated.
