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Connection of earth
lead wire
A
(a)
good example
For better measurement. it is required to use an earth
attachment available at option.
Multiply the reading of VOLTS DIY by 10.
For example. if the VOLTS/DIY ts SOmV/DIV. then
read the wavefonn as
SOmV/DIV
x
o
To avoid measurement error, put the probe in the follow
ing correction state and check it before measurement
without fail.
Connect the tip of the probe to the output tenninal
CAL O.SV of I kHz calibration square wave voltage.
When this correction capacity value is at optimum, the
wavefonn takes the shape as shown in Fig. (a) as follows.
20
A
(b)
bad example
10
SOOmV/DIV
=
If the wavefonn is as shown in Fig. (b) or Fig. (c),
rotate the semiftxed adjusting screw on the matching
box of the probe by using a screwdriver until the opti
mum state is obtained.
L
Capacitance correction trimmer
MJUl MM
JliUlJ1
(a)
Optimum
(b) Capacity too
(2) At time of direct connection
When connecting a signal directly to the oscilloscope not
usmg the attached probe
tion to the following points in order to minimize the mea
surement error.
When
perfonning observation using a bare lead wire, no
o
trouble occurs on the circuit to be measured at low
i m pedance and high level.
However. note that, in most cases. measurement error
may be caused by static stray coupling with other circuit
and power line.
This measurement error cannot be ignored even in low
frequency region.
(c) Capacity too
large
small
AT
-10 AK 1.5 (I O· 1
)
, pay atten
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