Sanwa CD731A, Instruction Manual

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− 40 −
●
If the display will not change when an input signal is applied
(measurement is not possible), a probable cause is a blown fuse.
●
Since this instrument employs the means value system for its
AC voltage measurement circuit, AC waveform other than sine
wave may cause error.
5-8 How to use optional products
Never apply an input signals exceeding the maximum rating
input value of optional products.
WARNING
5-8-1 AC Clamp Probe (CL-20D) Maximum measurement value AC 200 A
<Measurement procedure> (See Fig 14, page 17)
①
Connect the black plug of the current probe to the COM
−
input
terminal and the red plug to the
＋
input terminal.
② Set the function switch at "V / 〜 " function.
③ Select the select switch at " 〜 " and set the 4 V range with the
range hold switch.
④
Select either 20 A or 200 A with selector knob of clamp probe.
⑤
Open the clamp part, have electric line (one line) clamped.
⑥
Read the value on the display in A unit and when current probe
of the 20 A range after multiplying indicated value by 10, and the
200 A range after multiplying indicated value by 100.
⑦
After measurement, open the clamp part and release clamp probe
from the electric wire.
⑧ Turn the function switch to the position of OFF.
5-8-2 DC
･
AC Clamp Probe (CL-22AD) Maximum measurement value DC/AC 200 A
<Measurement procedure> (See Fig 15, page 18)
①
Connect the black plug of the current probe to the COM
−
terminal and the red plug to the
＋
terminal.
②
Set the function switch at "V /
〜
" function.
③ Select the select switch at " " (DC) or " 〜 " (AC).
④ Set the 400 mV range (at DC measurement) or 4 V range (at AC
measurement) with range hold switch.
⑤
Select either 20 A or 200 A with selector knob of clamp probe.
probe to make the display of the CD731a show "000.0".
⑥
Open the clamp part, have electric wire (one line) clamped.