HT instruments SIRIUS89N - Manual (Page 16)

SIRIUS89N
EN - 14
6.1.1. Calibrating the test leads ("CAL" Mode)
1. Connect the black and blue test leads to
B1 and B4 input terminals
respectively.
Connection of instrument terminals during calibration procedure.
2. If the test leads supplied with the instrument are not long enough for the
measurement you can extend the blue cable.
3. Short-circuit the measuring cable ends making sure that the conductive parts of the
crocodiles make a good contact to each other (see previous picture).
4. Press the
F2 key. The instrument carries out the calibration.
CAUTION
Never disconnect the test leads when the message
"MEASURING" is
displayed.
LOW
Ω 05.06.01
----
Ω
R+ R-
----
Ω ----Ω
---mA ---mA
AUTO 0.11
Ω
FUNC CAL
A numerical value
in this field means
that the instrument
has been
calibrated; this
value
remains on
the display for
any further
measurement
even though the
unit is switched off
and on again
5. At the end of the test the result is stored and used as
OFFSET (that is to say
that it is subtracted from any continuity test carried out) for all the
subsequent measurements.
Note: The instrument effects the calibration only if the resistance of the test leads is
lower than
5 Ω.
TEST LEADS Before each measurement always make sure that
the calibration is referred to the cables in use.
During a continuity test, if the resistance value free
of calibration (that is the resistance value less the
calibration offset value) is
negative, the symbols
o is displayed. Probably the calibration resistance
value stored in the instrument memory is not
referred to the cable in use, therefore a new
calibration must be effected.