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USER'S MANUAL

MD251 Basic Multimeter

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Summary of Contents for MD251

Page 1: ...USER S MANUAL MD251 Basic Multimeter...

Page 2: ...t category V Category II 1000V CAT III 600V and CAT IV 300V AC DC mA A Category III 500Vac and 300Vdc A Category III 600Vac and 300Vdc Per IEC61010 1 2nd Ed 2001 Measurement Category Measurement Categ...

Page 3: ...re the open circuit voltage is above the protection fuse voltage rating Suspected open circuit voltage should be checked with voltage functions Never attempt a voltage measurement with the test lead i...

Page 4: ...ct a function 4 Input Jack for milli amp and micro amp current functions 5 Input Jack for all functions EXCEPT current A mA A functions 6 Common Ground reference Input Jack for all functions 7 Input J...

Page 5: ...utral 5 Bus bars and electrical panels to vibrate Crest Factor Crest Factor is the ratio of the Crest instantaneous peak value to the True RMS value and is commonly used to define the dynamic range of...

Page 6: ...or current range to automatically set the most appropriate trigger level You can also press the RANGE button momentarily to select another trigger level manually If the Hz reading becomes unstable se...

Page 7: ...any cases the suspected component must be disconnected from the circuit to obtain an accurate reading Continuity function is convenient for checking wiring connections and operation of switches A cont...

Page 8: ...tions in sequence Last selection will be saved as power up default for repeat measurement convenience A mA and A Current functions Press SELECT button momentarily to toggle between DC and AC Last sele...

Page 9: ...ring breakage and to distinguish between live or earth connections Probe Contact EF Detection For more precise indication of live wires such as distinguishing between live and ground connections use t...

Page 10: ...on to resume 5 MAINTENANCE WARNING To avoid electrical shock disconnect the meter from any circuit remove the test leads from the input jacks and turn OFF the meter before opening the case Do not oper...

Page 11: ...se Fuse FS1 for AmA current input 0 63A 500Vac IR 50kA F fuse Fuse FS2 for A current input 10A 600Vac IR 100kA F fuse Battery and Fuse replacement Loosen the screw from the access cover of the case bo...

Page 12: ...rge Terminals to COM Measurement Category V Category II 1000V CAT III 600V and CAT IV 300V AC DC mA A Category III 500Vac and 300Vdc A Category III 600Vac and 300Vdc E M C Meets EN61326 1 2006 EN55022...

Page 13: ...ltage RANGE Accuracy 50Hz 400Hz 60 00mV 600 0mV 1 0 5d 6 000V 60 00V 600 0V 1000V CMRR 60dB DC to 60Hz Rs 1k Input Impedance 10M 50 pF nominal Ohm RANGE Accuracy 600 0 6 000K 60 00K 600 0K 0 5 4d 6 00...

Page 14: ...itivity square wave 5 00 Hz 500 0 kHz 3 Vpeak 5 00 Hz 1 000 MHz 5 Vpeak Accuracy 0 03 2d Hz Line ACV DCV Current Function Sensitivity Sine RMS Range 6V 0 4V 10Hz 10kHz 60V 4V 10Hz 50kHz 600V 40V 10Hz...

Page 15: ...14...

Page 16: ...h in Matco Tools opinion has been misused altered neglected or damaged by accident or abnormal conditions of operation or handling THIS WARRANTY IS EXCLUSIVE AND IS IN LIEU OF ALL OTHER WARRANTIES EXP...

Page 17: ...MANUAL DEL USUARIO Mult metro b sico MD251...

Page 18: ...l COM V Categor a II 1000 V CAT III 600 V y CAT IV 300 V CA y CD mA A Categor a III 500 VCA y 300 VCD A Categor a III 600 VCA y 300 VCD Seg n IEC61010 1 2da Ed 2001 en las categor as de medici n Categ...

Page 19: ...uito abierto est por encima de la clasificaci n de voltaje del fusible de protecci n Cualquier voltaje sospechoso de circuito abierto debe ser verificado con las funciones de voltaje Nunca intente rea...

Page 20: ...ara las funciones de corriente de miliamperios y microamperios 5 Enchufe de entrada para todas las funciones EXCEPTO las funciones de corriente A mA A 6 Enchufe de entrada Com n referencia a Tierra pa...

Page 21: ...as triples presentes en este conductor 5 Que las barras de conducci n y los paneles el ctricos empiecen a vibrar Factor de cresta El factor de cresta es la proporci n entre el valor de cresta pico ins...

Page 22: ...ntes de la se al y luego activar la funci n Hz en ese rango de voltaje o corrientes para programar autom ticamente el nivel de activaci n m s adecuado Tambi n puede oprimir el bot n RANGE moment neame...

Page 23: ...funci n de continuidad es conveniente para verificar las conexiones de los cables y el funcionamiento de los interruptores Un tono continuo indica un cable completo La ca da de voltaje normal en la p...

Page 24: ...nes de corriente en A mA y A Oprima el bot n SELECT moment neamente para cambiar entre CD y CA La ltima selecci n ser guardada como un predeterminado de encendido para la conveniencia de mediciones re...

Page 25: ...po el ctrico alrededor de conductores que conducen corriente Es ideal para rastrear conexiones de cables vivos ubicar roturas en los cables y distinguir entre conexiones vivas o de tierra Detecci n de...

Page 26: ...el mult metro para desactivar temporalmente la caracter stica del apagado autom tico APO Gire el interruptor rotativo a OFF y luego de regreso a encendido para continuar 5 MANTENIMIENTO ADVERTENCIA P...

Page 27: ...da de corriente AmA Fusible 0 63A 500 VCA IR 50 kA F Fusible FS2 para la entrada de corriente A Fusible 10A 600 VCA IR 100 kA F Reemplazo de la bater a y fusible Afloje el tornillo de la cubierta de a...

Page 28: ...e medidas de los terminales al COM V Categor a II 1000V CAT III 600 V y CAT IV 300 V CA y CD mA A Categor a III 500 VCA y 300VCD A Categor a III 600 VCA y 300 VCD E M C Cumple con las normas EN61326 1...

Page 29: ...ud 50Hz 400Hz 60 00 mV 600 0 mV 1 0 5 6 000 V 60 00 V 600 0 V y 1 000 V CMRR 60 dB desde CD hasta 60 Hz Rs 1 k Impedancia de entrada 10 M 50 pF nominal Ohmios RANGO Exactitud 600 0 6 000 K 60 00 K 600...

Page 30: ...1 000 MHz 5 Vpico Exactitud 0 03 2 d Hz l nea a VCA VCD corriente y Funci n Sensibilidad RMS sinusoidal Rango 6 V 0 4 V de 10 Hz a 10 kHz 60 V 4 V de 10 Hz a 50 kHz 600 V 40 V de 10 Hz a 50 kHz 1000 V...

Page 31: ...14...

Page 32: ...tco Tools haya sido usado incorrectamente alterado ignorado o da ado debido a alg n accidente o a condiciones anormales de funcionamiento o manejo ESTA GARANT A ES EXCLUSIVA Y REEMPLAZA TODAS LAS DEM...

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