User manual

Chapter II
MX 650 / MX 655
24
4.4. Measurement of direct current (MX 655 only)
1000
600
600
750
1000
V 1000
MAXMIN
40
400
600
A
1mS
PEAK
Hz
REL
HOLD
Set the switch to 1000 A .
Press on the / button to
display the symbol (direct
signal).
Once the display is stabilised,
press on the ∆
∆∆
∆REL button to
automatically reset the DC zero.
Then follow the same procedure
as for measuring alternating
current.
See previous §.
Note: The correct connection
direction to obtain a positive
value is indicated on the right-
hand jaw.
4.5. Measuring resistance
600V
750
1000
PEAK
1mS
400
40
A
REL
Hz
1000 V
600 1000
HOLD
600
Set the switch to Ω.
Connect the red test lead to the
"+" input terminal and the black
test lead to the "COM" input
terminal.
Place the touch prods in contact
with the points to be measured
and read the result on the
display.
Note: Always ensure that the
circuit is disconnected from the
power supply before measuring
resistance!
To measure low resistances, it
is preferable to offset the
resistance of the measurement
leads.
To do this, short-circuit the lead
touch prods then press the
∆
∆∆
∆ REL button before taking the
measurements.
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