YATO YT-73080 Bedienungsanleitung Seite 13

GB
the measurement cables. Do not realize any maintenance tasks without making sure the measurement cables have been
disconnected from the meter, and the meter itself has been turned off .
Replacement of the battery
The multimeter is powered with a 9V 6F22 battery. It is recommended to use alkaline batteries. In order to install a battery,
open the housing of the device removing the screws at the bottom of the meter. Connect the battery in accordance with
the marking of the terminals, close the housing and replace the screws. If the battery symbol is displayed, the battery
must be replaced. For the sake of precision of measurements, it is recommended to replace the battery as soon as
possible once the symbol of battery has been displayed.
Replacement of the fuse
The device is equipped with a 0.5A/250V (Ø5x20mm) quick-break equipment fuse. If the fuse is damaged, it must be
replaced with a new one of the same electrical parameters. To do so, open the housing of the meter and proceed as in
the case of replacement of the battery, observing the safety principles, to replace the fuse.
The 5A/250V (Ø5x20mm) fuse must be replaced in a specialised repair shop.
Connection of the test leads
Remove the protection caps from the plugs and connect them in accordance with the instructions. Then remove the
protections of the measurement part and proceed to measurements.
Depending on the actual position of the measurement range selector in the display three signifi cant digits will be
displayed. If it is necessary to replace the battery the multimeter indicates this displaying the battery symbol. If the
measured value is preceded by the "-" symbol, then the measured value has an opposite polarization in relation to the
connection of the meter. If only "1" is displayed, then the measurement range is exceeded, and it is necessary to increase
the measurement range. In case of measurements of quantities of unknown values, set the highest measurement range
and only after the initial measurement change the measurement range to the adequate one.
ATTENTION! The measurement range of the meter must not be lower than the measured value. It might damage
the meter and cause an electric shock.
The correct connection of the leads:
The red lead must be connected to the socket marked as „VΩmA", „5A"
The black lead must be connected to the socket marked as „COM"
In order to ensure the highest possible precision of the measurements the optimum measurement conditions must be
observed: ambient temperature between 18°C and 28°C and relative humidity <75 %
Example of determination of precision
Precision: ± % of the indication + weight of the least signifi cant digit
Measurement of the direct voltage: 1.396 V
Precision: ± (0.8% + 5)
Calculation of the error: 1.396 x 0.8% + 5 x 0.001 = 0.011168 + 0.005 = 0.016168
Result of the measurement: 1.396 V ± 0.016 V
Measurements of voltage
Connect the measurement cables to the sockets marked as „VΩmA" and „COM". Switch the measurement range selector
to the position of the measurement of the direct voltage or alternating voltage. Select the maximum measurement range,
connect the measurement cables in parallel to the electric circuit and read the result of the measurements of the voltage.
In order to ensure more precise results of the measurement you may change the measurement range. Do not ever
measure a voltage exceeding 500 V in case of measurements of the direct voltage and 500 V rms (square average) in
case of measurements of the alternating voltage. It might damage the meter and cause an electric shock.
Measurement of intensity of the current
Depending on the expected value of the measured intensity of the current connect the measurement cables to the socket
marked as „VΩmA" and „COM" or to the socket marked as „5A" and „COM". Select the adequate measurement range
using the measurement range selector and the kind of the measured current.
Maximum intensity of the current measured through the „VΩmA" socket may amount to 200 mA. In case of measurements
of the current exceeding 200 mA connect the lead to the socket marked as „5A". Maximum intensity of the current
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