YT730895 - Multimeter Yato - Free user manual and instructions

USER MANUAL YT730895 Yato

4. measurement probes

INSTRUMENT CHARACTERISTICS The multifunction meter is a digital measuring instrument designed to measure various electrical quantities. Before using the meter, read the entire instruction manual and keep it for future reference. The meter features a plastic housing, a liquid crystal display, and a measuring range switch. The housing has measurement jacks fi tted. The meter comes with measurement cables terminated with plugs. The meter is sold without a battery. ATTENTION! This meter is not a measuring instrument within the meaning of the Trade Metrology Act. TECHNICAL DATA Display: 5 digit LCD – maximum displayed result: 25000 Sampling frequency: 3 samples per second Overload symbol: “OL” symbol displayed Polarity symbol: “–” sign displayed before the measurement result Battery: 3 x AA; (3 x 1.5 V) Operating temperature: 0 to 40

C at relative air humidity <75% Storage temperature: -10

C at relative air humidity <80% Outer dimensions: 180 x 90 x 50 mm Weight (without batteries): 260 g ATTENTION! It is forbidden to measure electrical values exceeding the maximum measurement range of the meter. DC voltage AC voltage Range Resolution Accuracy Range Resolution Accuracy

1000.0 V 0.1 V 750.0 V 0.1 V Direct current + alternating current (DC) Direct current + alternating current (AC) Range Resolution Accuracy Range Resolution Accuracy 2.5000 V 0.0001 V ±(0.5% + 3)

1000.0 V 0.1 V Direct current Alternating current Range Resolution Accuracy Range Resolution Accuracy 2.5000 A 0.0001 A ±(0.5% + 3) 2.5000 A 0.0001 A ±(0.8% + 3)

Resistance Capacitance Range Resolution Accuracy Range Resolution Accuracy

Frequency Range Resolution Accuracy

Duty cycle Range Resolution Accuracy 0.1% ÷ 99% 0.1% ±(0.1% + 2) Temperature Range Resolution Accuracy

Accuracy: ± % of the indication + weight of the least signifi cant digit MULTIMETER OPERATION ATTENTION! Before opening the instrument housing, disconnect the measurement cables and turn off the meter to avoid the risk of electrocution. Safety instructions Do not operate the meter in an atmosphere with excessive humidity or in the presence of toxic or fl am- mable vapours, or in an explosive atmosphere. Before each use, check the condition of the meter and the measurement cables. In case of noticing any faults, do not start operation. Replace damaged cables with new ones, free from defects. If in doubt, contact the manufacturer. During measurement, hold the test leads only by the insulated sections. Do not touch the measurement points or unused jacks of the meter. Disconnect the measurement cables before changing the measured quantity. Never carry out maintenance work without ensuring that the test leads have been disconnected from the meter and that the meter itself has been turned off . Replacing the battery The multimeter requires batteries, the number and type of which are defi ned in the technical data sec- tion. It is recommended to use alkaline batteries. To install the batteries, open the instrument housing or the battery compartment cover on the underside of the meter. Before accessing the battery compart- ment, it may be necessary to remove the cover on the meter housing. Connect the battery according to its terminal marking, close the housing or battery compartment cover. If a battery symbol appears on the screen, the batteries must be replaced. To ensure measurement accuracy, it is recommended to replace the batteries as soon as possible, after the battery symbol appears. Fuse replacement The instrument uses a fast-acting safety fuse. In case of damage, replace the fuse with a new one with identical electrical parameters. To do this, remove the fl exible housing cover, remove all screws fi xing the14 ORIGINAL INSTRUCTIONS

two parts of the housing, open the meter housing and replace the fuse with a new one. The parameters of the fuse are indicated on the fuse housing. When replacing both fuses, it is recommended to replace the fuses one by one, so as not to change them with places. 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 make it possible to select the measurement quantity and its range. The meter will turn off automatically, if not in use. After about 15 minutes of inactivity, the meter will turn off automatical- ly. This will reduce battery consumption. The user will be notifi ed by a sound signal, approximately one minute before the power supply is turned off . If the meter turns off automatically, pressing the SEL button will restore the meter to operation. SEL / REL button Short press of the button will allow to select measurement quantity for settings of the main switch de- scribed using few quantities. Change the measurement quantity by pressing this button. Pressing and holding the button for approx. 2 seconds will activate the function that enables measuring the relative value. Activating the function during measurement will reset the display and record the value which was visible before displaying it as a reference level. The new measurement will show the diff erence between the measured value and the recorded reference value. When pressed again, the button restores the nor- mal measurement mode. When the function is active, this is indicated by the REL symbol on the display. RANGE button The button is used to manually change the measuring range for a given quantity. When pressed, the AUTO symbol will disappear. Pressing the button again will switch the range in the order shown in the table. Holding down the button for approx. 1 second restores automatic ranging. The MAX/MIN button The button is used to activate the operating mode in which the maximum or minimum measurement result will be displayed from the moment of activating the given mode. Short presses of the button allow changing the measurement mode in a cycle: maximum (MAX) / minimum (MIN), while pressing and holding the but- ton for approx. 2 seconds allows the instantaneous value (AUTO) to be activated. Symbols which will be displayed on the screen depending on the mode of operation selected are enclosed in brackets. HOLD button* The button is used to retain the measured value on the display. When pressed, the button will keep the currently displayed value on the display, even after the measurement is over. Press the button again to go back to the measurement mode. The operation of the function is indicated on the meter display with the “HOLD” message. Holding the button for approx. 2 seconds will activate the display illumination and LED light. Press the button again and hold it for approx. 2 seconds to turn off the display illumination and LED light. Connecting the measurement cables If the measurement cable plugs are capped, remove the caps before plugging the cables into the jacks. Connect the cables in accordance with the instructions provided in the manual. Next, remove the meas- uring section caps (if any) and proceed with the measurements. Built-in buzzer The meter has a built-in buzzer that emits a brief sound signal each time the selector is turned or a button is pressed to confi rm the action has taken place. The buzzer will emit several sound signals per minute before the meter is automatically switched off and one long signal immediately before it is automatically switched off . The meter switches off automatically 15 minutes after the button has last been pressed or the selector’s position has been changed. MEASUREMENT PROCEDURE Depending on the current position of the range switch, the display will show fi ve 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 the measured value has a re- versed polarity relative to the meter’s connection. If an overload symbol appears on the display, it means that the measurement range has been exceeded and it must be increased. In the case of measurements of unknown values the meter should be set to the AUTO mode, in which case it determines the best measuring range by itself. If the selector is set to measure AC current or voltage, the meter will start measuring in the True RMS mode. This means that the true RMS 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 theORIGINAL INSTRUCTIONS

highest voltage range, in order to avoid electric shock. ATTENTION! Never allow the measuring range of the meter to be smaller than the measured value. This can damage the meter and cause electrocution. The correct connection of the cables: The red cable goes in the jack marked VHz, mA A or 20A. The black cable goes in the jack marked COM. Ensure the optimum measurement conditions in order to achieve the highest possible accuracy of measure- ment. The ambient working temperature should be in the range from 18 to 28

C and relative air humidity <75%. Example of accuracy determination Accuracy: ± (% of the indication + weight of the least signifi cant digit) Measurement of DC voltage: 1.396 V Accuracy: ±(0.8% + 5) Calculation of error: 1.396 × 0.8% + 5 × 0.001 = 0.011168 + 0.005 = 0.016168 Measurement result: 1.396 V ± 0.016 V Voltage measurement Connect the measurement cables to the VHz and COM jacks. Set the main switch to the voltage meas- urement position (V). Connect the measurement cables in parallel to an electrical circuit and read the voltage measurement result. The meter will automatically select the appropriate measuring range, which can be changed by pressing the RANGE button, if necessary. Never measure voltage that is higher than the maximum measurement range. This can damage the meter and cause electrocution. After select- ing the lowest measurement range and when the measurement cables are disconnected, a changing measurement value can be seen on the display. It is a normal phenomenon. To eliminate it, it is enough to connect the tips of measurement cables with each other. While measuring the AC voltage, press the SEL button to measure the voltage frequency which will be displayed in the main row of the display. Simultaneous measurement of DC and AC voltage This mode is used to measure the voltage of signals where DC and AC components occur simultane- ously, e.g. when measuring the noise of audio signals. Connect the measurement cables to the VHz and COM jacks. Set the main switch to the voltage measurement position (V AC+DC). Connect the measurement cables in parallel to an electrical circuit and read the measurement result. The DC voltage measurement value is displayed in the main row of the display, while the AC voltage measurement value is displayed in the top row of the display. Press the SEL button briefl y to read the result of the sum of the DC and AC voltage values (AC+DC). Current intensity measurement Depending on the expected current intensity value, connect the measurement cables to the mA A and COM jacks or to the 20A and COM jacks. Choose the appropriate measurement range using the selector. The maximum intensity of the measured current at the mA A jack can be 250 mA. In the case of meas- uring current above 250 mA, connect the cable to the jack marked 20A. The maximum intensity of current measured in the 20A jack may be 20 A. The measuring time for currents higher than 2.5 A should not ex- ceed 15 seconds. After that, there must be a 3-5-minute break at a minimum before the next measurement. The mA A jack can be loaded with a maximum current of 250 mA. It is absolutely forbidden to exceed the maximum values of current and voltage values for a given jack. The measurement 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. While measuring the current, press the SEL button to measure the current frequency which will be displayed in the main row of the display. Measurement of resistance Connect the measurement cables to the VHz and COM jacks and set the range switch to the resist- ance measurement position marked with the symbol. Connect the test leads to the terminals of the measured component and read the measurement result. For measurements greater than 1 M, 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 component, an overload symbol is shown on the display. It is absolutely forbidden to measure the resistance of components through which electric current fl ows or of charged capacitors. Diode test Connect the measurement cables to the jacks marked VHz and COM and set the selector to the diode symbol. Now connect the test leads to the diode terminals, according to the direction of conduction and16 ORIGINAL INSTRUCTIONS

in the reverse direction. If the diode is working, it will show a voltage drop in its forward direction ex- pressed in mV. If connected in the reverse direction, the display will show the overload symbol. Working diodes are characterised by a low resistance in the forward direction and a high resistance in the reverse direction. It is absolutely forbidden to test diodes through which electric current is fl owing. Conductivity test Connect the measurement cables to the VHz and COM jacks. Set the selector to the buzzer symbol. Use the SEL button to select the conductivity test. This action will be confi rmed by the display of the buzzer symbol. If the meter is used to measure conduction, the built-in buzzer will sound whenever the measured resistance drops below 50 . The buzzer can also emit a sound when the resistance is in the range from 50 to 100 . It is absolutely forbidden to test conductivity in circuits through which electric current is fl owing. Non-contact AC voltage detection The meter has a sensor that can detect the electromagnetic fi eld generated by AC voltage. Turning the selector to the position marked “NCV” will be confi rmed by the display showing “EF”. Bring closer the NCV sensor in the front plate of the meter to the point to be checked in terms of electromagnetic fi eld presence. The greater the detected electromagnetic fi eld, the faster the buzzer sound will be. This measurement can be used, for example, to detect hidden AC voltage wires. However, it should be remembered that such a measurement is a󰀨 ected by many external factors and may be disturbed by external electromagnetic fi elds. Do not rely solely on this method to detect live wires. Contact voltage detection Turn the selector to the „NCV” position. Connect the single cable to the VHz jack. Bring the test lead into contact with the component to be measured. If it is live, the buzzer will sound. Capacitance measurement Connect the measurement cables to the VHz and COM jacks and set the range switch to the capac- itance measurement position. Make sure that the capacitor has been discharged, before the measure- ment. Never measure the capacitance of a charged capacitor as this can damage the meter and cause electric shock. When measuring high-capacitance capacitors, the measurement may take about 30 seconds before the result becomes stable. When measuring small capacitances, subtract the capacitance of the meter and the measurement ca- bles to obtain a more accurate result. Frequency / duty cycle measurement Connect the measurement cables to the VHz and COM jacks. Turn the selector to the position marked Hz %. Bring the test leads into contact with the component to be measured. The result of the frequency measurement is shown in the main row of the display and the result of the duty cycle measurement is shown in the top row of the display. Temperature measurement Connect the ends of the thermocouple leads to the INPUT and COM jacks. Set the meter selector to the

F position. Apply the metal part of the thermocouple to the tested surface. The measurement result given in degrees Celsius (

marker) is shown in the main row of the display and the temperature measurement result given in degrees Fahrenheit (

F marker) is shown in the top row of the display.

MAINTENANCE AND STORAGE

Wipe the meter with a soft cloth. Larger amounts of dirt should be removed with a slightly damp cloth. Do not immerse the meter in water or any other liquid. Do not use solvents, or corrosive or abrasive agents for cleaning. Care should be taken to keep the contacts of the meter and the measurement cables clean. Clean the contacts of the measurement cables with a cloth slightly soaked in isopropyl alcohol. In order to clean the contacts of the meter, turn o󰀨 the meter and remove the batteries. Turn the meter over and shake it gently so that larger pieces of dirt fall out of the meter connectors. Lightly soak a cotton swab in isopropyl alcohol and clean each contact. Wait for the alcohol to evaporate and then install the batteries. The meter should be stored in a dry room, inside the supplied unit packaging.ORIGINALANLEITUNG