YATO YT-73089 Originalanleitung Seite 15

EN
current or voltage, the meter will start measuring in the True RMS mode. This means that the
real eff ective value of the alternating wave will be measured. If a non-sine wave is measured, the
actual RMS value for that particular wave will be displayed. Special care should be taken when
measuring quantities within the highest voltage range, in order to avoid electric shock.
CAUTION! Never allow the measuring range of the meter to be smaller than the measured
value. This can damage the meter and cause electric shock.
The correct connection of the cables:
The red cable is connected to the socket marked as VΩHz or A mA.
The black cable goes in the jack marked COM.
In order to achieve the highest possible measurement accuracy, optimal measurement conditions
should be ensured. The ambient working temperature should be in the range from 18 to 28 C.
o
and relative air humidity <75%.
An example of measuring accuracy
Accuracy: ±(% of the indication + weight of the least signifi cant digit)
Measurement of constant voltage: 1.396 V
Accuracy: ±(0.8% + 5)
Calculation of error: 1.396 x 0.8% + 5 x 0.001 = 0.011168 + 0.005 = 0.016168
Measurement result: 1.396 V ± 0.016 V
Voltage measurement
Connect the measuring cables to the sockets marked as VΩHz and COM. Set the range switch
to the DC or AC voltage measurement position. Connect the measuring cables in parallel to an
electrical circuit and read the resultant voltage. Never measure a voltage which is higher than the
maximum measuring range. This can damage the meter and cause electric shock.
Current measurement
Depending on the expected measured current intensity, connect the measuring cables to the
VΩHz and COM sockets, or to the A mA and COM sockets. Select the appropriate measuring
range using the knob. The maximum current intensity measured at the VΩHz socket can be
999.9 μA. If the measured current intensity exceeds 999.9 μA, connect the cable to the A mA
socket. The maximum current intensity measured at the A mA socket can be 9.999 A, but the
measuring time regarding currents exceeding 2 A cannot go beyond 15 seconds. Then, apply at
least a 15-minute break before conducting a successive measurement. The VΩHz socket can be
loaded with a maximum current of 999.9 μA, without any time limits. It is forbidden to exceed
the maximum values of currents and voltages for a given jack. The measuring cables should
be connected in series to the tested electrical circuit. Select the type of current measured, using
the selector and read the measurement result. The meter will automatically select the appropriate
measuring range, which can be changed by pressing the RANGE button, if necessary.
Caution! Do not exceed the voltage of 36 V DC or 25 V AC, when measuring currents.
Resistance measurement
Connect the measuring cables to the sockets marked as VΩHz and COM and set the range
switch to the resistance measurement position marked with the Ω symbol. Use the SEL button
to select the resistance measurement and the "Ω" symbol will appear on the screen. Apply the
measuring cables to the terminals of the measured element and read the measurement result. In
order to obtain more accurate measurement results, change the measuring range if necessary.
It is absolutely forbidden to measure the resistance of elements through which electric
current is fl owing. For measurements greater than 1 MΩ, the measurement may take a few
seconds before the readout becomes stable, which is the normal response for high resistance
measurements.
Before applying the tips to the terminals of the measured element, an overload symbol is shown
on the display.
O R I G I N A L I N S T R U C T I O N S
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