Measurement Procedure - YATO YT-73092 Manual De Instrucciones

GB
Replacing the battery
The multimeter requires batteries, the number and type of which are specifi ed in the technical specifi cations. It is rec-
ommended to use alkaline batteries. To install a battery, open the instrument casing or the battery compartment cover
on the underside of the meter. Before accessing the battery compartment it may be necessary to slide off the cover of
the meter casing. Connect the battery according to its terminal marking, close the casing or battery compartment cov-
er. If a battery symbol appears on the screen, the battery must be replaced. For the sake of measurement accuracy,
it is recommended to replace the battery as soon as possible after the battery symbol appears.
Switching the meter on and off
Set the measurement switch to the OFF position to turn the meter off . The remaining switch positions activate the
meter and permit selection of the measured quantity and its range. The meter has a function of automatic switching
off in case of inactivity of the user; after about 15 minutes from the last user's reaction, the meter will switch off auto-
matically. This will reduce battery consumption.
Flashlight symbol button
Press this button to turn on the small fl ashlight located in the front of the meter. Press the button again to turn off
the fl ashlight.
VFC button
In case of measurement of alternating voltage or alternating current, press the button to switch the meter to the
measurement mode of voltage or current of alternating frequency - V.F.C. marker.
SEL button
Press the button to select measured quantity in the case of the settings of the main switch described using few
quantities.

MEASUREMENT PROCEDURE

Depending on the current position of the range switch, the display shows four digits. If the battery needs to be
replaced, the multimeter indicates this by showing the battery symbol on the display. If the sign "–" appears on the
display before the measured value, it means that it has a reversed polarity relative to the meter's connection. If an
overload symbol appears on the display, it means that the measuring range has been exceeded and the measuring
range must be changed to a higher one.
If the scale of the measured value is not known, set the highest measuring range and reduce it after reading the meas-
ured value. The measurement of small quantities with a high measuring range involves the greatest measurement er-
ror. Special care should be taken when measuring quantities within the highest voltage range 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 test leads is:
The red lead goes in the jack marked INPUT.
The black test lead goes in the jack marked COM.
In order to achieve the highest possible measurement accuracy, optimal measurement conditions should be ensured.
The range of temperature and humidity is given in the technical data.
Example of accuracy determination
Accuracy: ±(% of indication + weight of the least signifi cant digit)
Measurement of DC 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 test leads to the jacks marked "INPUT" and "COM". Set the main switch to the voltage measurement
position. Press the SEL button to select the type of the voltage to be measured. Connect the test leads in parallel to
an electrical circuit and read the resultant voltage. Never measure a voltage which is higher than the maximum meas-
uring range. This can damage the meter and cause electric shock. After selecting the lowest measurement range
and when the test leads are disconnected, a changing measurement value can be seen on the display. It is a normal
phenomenon. To eliminate it, is enough to connect the tips of test leads with each other.
Measurement of AC current using a clamp
Use the selector to set the appropriate measuring range. Open the measuring clamp by pressing the lever. Place a sin-
gle wire through which alternating current is fl owing within the clamp and close it. Make sure that the jaws of the clamps
adhere exactly to each other. For the most accurate measurement it is necessary to make sure that the cable is held
centrally between the jaws. This is facilitated by the markers engraved on the clamp jaws. The error due to the non-cen-
tral location of the wire is 2.5% of the measured value, but it can be avoided by placing the wire centrally inside the
jaws. Read the result. Do not touch exposed conductive surfaces during measurement. This may cause electric shock.
Voltage measurement mode with low input impedance
The meter allows to measure voltage at low input impedance, which eliminates the interference associated with
residual voltage. Connect the test leads to the jacks marked INPUT and COM, set the knob to the position marked
LowZ. Never measure a voltage which is higher than the maximum measuring range. This can damage the meter
and cause electric shock.
O R I G I N A L I N S T R U C T I O N S
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