HT instruments EQUITEST5071 - Manual (Page 12)

EQUITEST 5071
EN - 10
6.1.1. Calibration of measuring cables
1. Insert the black cable and the blue cable into the relevant input terminals B1 and B4 of
the instrument.
Fig. 3: Terminal connection during calibration procedure
2. If, for the measurement to be carried out, the length of the cables provided should be
insufficient, extend the blue cable.
3. Insert two alligator clips into the cable terminals.
4. Short-circuit the measuring cables’ ends, taking care that the conductive parts of the
alligator clips have good contact (see Fig. 3)
5. Press the F2 key. The instrument calibrates.
CAUTION
Never disconnect the terminals from the measuring points when the
instrument shows the message "MEASURING…".
LOW
 30.11.12
----

R+ R-
----
 ----
---mA ---mA
AUTO 0.11

This numerical
value indicates
that calibration has
been carried out
FUNC CAL
6. At measurement end, the instrument gives out a double sound, to indicate that
calibration has been correctly carried out. The value of calibration is updated and
displayed above the F2 key. This value shall remain saved also after the instrument
has been switched off.
CAUTION
 The instrument calibrates the measuring cables only if their resistance is
lower than 5

 Before carrying out any measurement, always make sure that calibration
is referred to the cables currently used. In a continuity test, if the purified
resistance value (i.e. the value of resistance minus the calibration offset
value) is negative, the symbol “CAL” flashes on the display.
7. To delete the calibration parameter it is necessary to carry out a calibration
procedure with a lead resistance higher than 5
 (e.g. with open leads). When
carrying out a deletion, the symbol “- - -“ is shown on the display above the F2 key.