Calibrating The Test Leads ("Cal" Mode) - MARTINDALE VR2250 User Instruction Manual

6.1.1. Calibrating the test leads ("CAL" Mode)

1. Connect the Red and Black test leads to B1 and B4 input terminals
respectively.
Connection of the test leads during calibration procedure.
2. If the test leads supplied with the instrument are not long enough for the
measurement you can extend the black 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.
Never disconnect the test leads when the message "MEASURING" is
displayed.
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 performs the calibration only if the resistance of the test leads is
lower than 5Ω.
RED
BLACK
CAUTION
LOWΩ 05.06.01
----Ω
R+ R-
----Ω ----Ω
---mA ---mA
AUTO 0.11Ω
FUNC CAL
Page 15 of 131
B1 B2 B3 B4
A numerical value
in this field means
that the instrument
has
calibrated;
value remains on
the display
any further
measurement
even though the
unit is switched off
and on again.
VR2250
been
this
for