YATO YT-73088 Manual Del Usuario página 12

PL GB
Button „Max/Min"
The purpose of the button is to activate the mode of minimum and maximum values registration. In order to activate the mode push and
hold the button for approximately 1 second. Once the mode has been activated, the multimeter starts to register the displayed results.
Each time the indicated value drops below the minimum registered value or rises above the maximum registered value, new values
are registered in the memory of the multimeter. Pushing the button permits to display alternately the minimum and maximum register
value, which is signalled in the display with a corresponding indicator. To leave the maximum and minimum register mode push the
„Max/Min" button and hold it for approximately 1 second.
Attention! In case of quantities for which the meter may automatically select the measurement range, activation of the minimum and maxi-
mum register value will deactivate the automatic measurement range selection. Select previously the adequate measurement range.
Button „Range"
The purpose of the button is to manually change the measurement range for the given quantity. When it is pushed „AUTO" disappears
from the display. If it is pushed again the range is changed in the sequence indicated in the table. If the button is held for approximately
1 second, then the automatic range selection is restored.
Button „Select"
The purpose of the button is to select the quantity to be measured. In case of current intensity measurements it permits to choose be-
tween measurements of direct and alternating current. In case of a measurement of temperature it permits to switch between Celsius
and Fahrenheit and to choose between a diode test and conduction test.
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.
Internal buzzer
The meter is equipped with an internal buzzer, which emits a short sound every time a button is pressed to confirm it. The buzzer
will emit a sound in the following situations: in case of a measurement of current in the automatic range selection mode, if the meter
switches the range from 6 A to 10 A. While switching the range „OL" is indicated in the display. The buzzer will emit five sound signals
per minute before the meter turns off automatically and one long sound signal immediately before the meter turns off automatically. If
the selector remains in the same position and no other button is pushed, the meter will turn out automatically after approximately 15
minutes. If the multimeter is connected to a computer, the meter will not turn off automatically.
MEASUREMENTS
Depending on the actual position of the range switch four significant digits will be displayed. If it is necessary to replace the battery the
multimeter indicates this displaying the battery symbol. If before the measured value the "-" symbol is displayed then the measured
value has an opposite polarization in relation to the connection of the meter. If only „OL" 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
meter in the „AUTO" mode, so that the best measurement range is determined automatically.
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 „VΩHz", „μA/mA" or „10A".
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: ambi-
ent temperature between 18°C and 28°C and relative humidity <75 %
Determination of precision
Precision: ± % of the indication + weight of the least significant 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 „VΩHz" and "COM". Switch the range selector to the position of the
measurement of the direct voltage or alternating voltage. Connect the measurement cables in parallel to the electric circuit and read
the result of the measurements of the voltage. Do not ever measure a voltage exceeding 600 V, which might damage the meter and
cause an electric shock.
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