YOKOGAWA TY710, Руководство пользователя

Страница: 34 / 61

89
4.3.10 Current Measurement (µA/mA/A)
W ARNIN G
To avoid damage to instrument or equipment
• Before starting measurement, make sure that the position of function switch and the
input terminals for connecting the testing leads are appropriate for the desired mode of
measurement.
• The maximum input current (limited by fuses) of the “µA” and “mA” ranges is 440 mA.
Be sure not to exceed the limit in the 500 mA range.
Be careful not to burn yourself
• When measuring more than 6A under exceeding 40 ℃ conditions, the continuous measuring
time shall be within 3 minutes, then keep disconnected for more than 10 minutes.
1) Turn the function switch to the “µA ” , “mA ” or “A ”position.
(If the magnitude of the current being measured is not known,
select the “A ”position. Make sure the current being measured
is no more than 440mA before the “µA ” or “mA ” position is
selected.)
2) Please select between DC and AC. When selecting AC, press
the SELECT key.
3) Plug the black testing lead into the “ COM ” input terminal and
the red testing lead into the “A ”input terminal.
If the current is in the order of mA or less, plug the red testing
lead into the “µA • mA” input terminal.
4) Connect the testing leads to the circuit under test and then read
the value when it stabilizes.
Testing leads
Red
Black
Testing leads
Red Black
Note
• This instrument has a function which automatically corrects the offset of the internal circuit
when measuring DCA.
This correction is designed to operate once at the following timing: power on, a function is
switched or a range is switched.
When the environment temperature is changing a certain amount, it is recommended to
switch a function and make a correction deliberately for better accurate measurement.