MI 2126 Earth 2/3
Using instrument
11
Step 3
TEST
Press the
TEST
key and view test result. If you want to perform more
than one measurement press the
TEST
key and keep it pressed until
the result is stabilized, then release the key. The last result will stay
displayed.
DISP
Press the
DISP
key to check the resistances of both the potential (
Rp)
,
and the current (
Rc)
test probes. After a short period the main result
will automatically be displayed again.
Notes
:
•
When an external voltage higher than 20 V a.c. is present between blue (H), black
(E) and red (S) test terminals, the earth resistance measurement will not be carried
out after pressing the
TEST
key. The message
20 V
will be displayed instead,
marked with
symbol!
•
If a noise voltage higher than approx. 3 V is present between blue (H) and black (E)
or red (S) test terminals, symbols
~
and
will be displayed, indicating that the
test result may not be correct!
•
The instrument does not indicate if a DC voltage is present at the input terminals.
•
DC voltage have no influence on the measurement.
•
If the resistance of the current or potential rod is too high (>(4 k
Ω
+ 100xR
E
) or >50
k
Ω
, whichever is lower), then the result will be marked with
symbol.
•
If the test result is out of measurement range
o.r.
message will be displayed.
•
Measured values of Rp and Rc are in k
Ω
.
3.2 Performing 2-wire measurement
The Earth 2/3 is able to carry out earth resistance measurement using two wire test
method.
Step 1
•
Connect test leads to the instrument (red (S) and blue (H) together) and to the
object under test according to the figures below.
