Jeulin 291 034, Измерения и приборостроение

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Measurement and instrumentation
Multimeter model UT70A
Réf:
291 034
ENGLISH 18
3) Connect the test leads to the tested component or bath ends 01 the return
circuit firmly, the resistance value 01 the tested component or return circuit
shall show on the display immediately.
4) 2000M Ω High Resistance Measurement: Before making a measurement 01
this range, short-circuit bath red and black test leads. The display shall show
an initial error value in around 10 digits, record this error value. Then
connect the abject to be tested. Minus the initial error value from the tested
value and the result shall be the measured resistance value.
Note:
The range of 2000M Ω is applicable to high resistance measurement. It is
normal when it responds slowly. When measuring resistance value less than
20M
Ω it is suggested to select the range below 20M Ω in order to minimize
measuring error.
WARNING:
It is not allowed to make a measurement in a live return circuit. Return
circuit power shall be cut off and capacitors in return circuit shall be
discharged (large capacitance value in particular) before measuring. It is
forbidden to introduce a voltage signal when a measurement is made.
4.6 Inductance Measurement (L)
1) Set Function/Range Selector to "Required Range" and press "LC" button
down.
2) If the value of inductance to be measured is unknown, select the maximum
range first and reduce the range step by step until a satisfactory reading is
obtained.
3) Select Multi-purpose socket or test clip according to the size of the
inductor's pins to be tested and insert it into two input jacks of "mA" and
"
V/ Ω " firmly for test and the display shall show the tested inductance value
at once.
WARNING:
Inductance test shall be stay away from any strong magnetic field to
ensure an accurate measurement.
4.7 Capacitance Measurement (C)
1) Set Function/Range Selector to "C" and press "LC" button down.
2) If the value of capacitance to be measured is unknown, select the maximum
range first and reduce the range step by step until a satisfactory reading is
obtained.
3) Select Multi-purpose socket or test clip according to the size of the
capacitor's lead to be tested and insert it into two input jacks of "mA" and
"
V/ Ω " firmly for test and the display shall show the tested capacitance value
at once.
4) For ensuring the precision, especially in low capacitance 20nF range, the
right reading should be the result of the measuring reading minus the open
circuit reading.
WARNING:
It is not allowed to make measurement of capacitance on live circuit. The
capacitor to be tested shall be discharged by short-circuiting before test.