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E N G L I S H

35

You can measure any conductor 
carrying AC unless this conductor is 
at a potential above 600V AC or at a 
frequency above 10KHz.

True rms measurement yields the 
effective current value. 

1. Press the ON-OFF pushbutton to 
turn on this Meter.
2. Clamp around the conductor 
to be measured. Be sure the 
clamp jaws are securely closed, or 
measurements will not be accurate.
3. Observe the display for true-RMS 
current flow.
4. Press the Hz pushbutton to 
measure frequency.
5. Press the HOLD pushbutton 
to freeze the digital display, if 
necessary.
6. To soften readings, press the 
SOFT-CREST pushbutton once 
(SOFT displayed) or to measure 
half-cycle peak amperes, press this 
pushbutton twice (PEAK displayed). 
A crest factor (see 5.12 Using Crest) 
other than 1.414 is an indication of 
non-linear current flow.
7. To record readings and to view 
readings, press the MIN-MAX 
pushbutton.

8. To clear RECORD, press the MIN-
MAX pushbutton for 2 seconds.

6.3 Motors

You can measure starting (inrush) 
current, running current, and current 
imbalance.

Inrush current is typically 6 times the 
value of running current, depending 
on the motor type.

1. Press the ON-OFF pushbutton to 
turn on this Meter.
2. Clamp around a motor phase 
conductor. Be sure the clamp 
jaws are securely closed, or 
measurements will not be accurate.
3. While watching the bar graph, 
turn on the motor and observe 
the level of inrush current. In this 
case, the bar graph is better than 
the digital display because the bar 
graph response is faster than the 
digital display.
4. When the motor reaches the 
desired speed, observe the running 
current.
5. Repeat your measurement for 
each motor phases. Unbalanced 
current may be caused by a voltage 
imbalance, or a shorted motor 
winding.
6. Repeat steps 1 thru 3, then 
press the MIN-MAX pushbutton to 
enable RECORD.
7. Turn on the motor. When the 
motor gets to the desired speed, 

Содержание UD337

Страница 1: ...Lea entienda y siga las instrucciones de seguridad contenidas en este documento antes de operar esta herramienta WARNING Read understand and follow the safety rules in this document before operating t...

Страница 2: ...1 Reemplazo de bater a 5 2 Notas 5 3 Auto Prueba Encendido 5 4 Medici n de Amperaje CA 5 5 Medici n de Amperaje CD 5 6 Medici n de frecuencia 5 7 Usando la captura de datos HOLD 5 8 Medici n de volta...

Страница 3: ...ongelar lecturas en pantalla Gr fica de barras an loga de 41 segmentos que muestra simult neamente la corriente mientras mide frecuencia Indicador de bater a baja e indicador de vida de bater a al enc...

Страница 4: ...ra da o en el aislamiento o metal expuesto Verifique la continuidad de las puntas de prueba Las puntas de prueba da adas deben ser reemplazadas Desconecte la punta de prueba viva antes de desconectar...

Страница 5: ...ntalla en el modo RECORD presionando los botones MIN MAX 19 Mostrado en pantalla cuando el bot n HOLD ha sido presionado 20 Mostrado en pantalla cuando el bot n ha sido presionado 21 SOFT Mostrado en...

Страница 6: ...ales negativas 35 AUTO Mostrado cuando el rango autom tico controla la gr fica de barras escala de 0 a 40A o 0 a 400A y la posici n del punto decimal en la pantalla digital 36 POWER LOCK Mostrado en p...

Страница 7: ...costado de las quijadas del gancho y se asegure en posici n 7 Reinstale los tres tornillos de sujeci n Si el mult metro no va a ser utilizado por un periodo mayor a 60 d as remueva la bater a y gu rde...

Страница 8: ...urre aunque se est realizando una medici n Para deshabilitar el auto apagado presione el bot n ON OFF se muestra Si el bot n ON OFF es presionado otra vez el mult metro se apaga Cuando trate de utiliz...

Страница 9: ...do con corriente el valor del amperaje CD tiene una polaridad positiva o negativa dependiendo de la direcci n de la carga en el conductor Este valor es positivo cuando la corriente fluye en el conduct...

Страница 10: ...mostrado en pantalla para salir del modo HOLD Presione el bot n RANGE por 2 segundos y su ltelo para activar el modo de auto rango El mult metro emite un tono beep y AUTO se muestra en pantalla 5 8 Me...

Страница 11: ...para un par est ndar de puntas de prueba Cuando se realizan mediciones de resistencia aseg rese que el contacto entrelaspuntasdepruebayelcircuito a probar sea buena Suciedad aceite flux de soldadura o...

Страница 12: ...os modos Ambas pantallas la digital y la gr fica de barras an loga miden medio ciclo del pico de amperaje CA cuando PEAK se muestra en pantalla EL factor de cresta de una forma de onda es el radio de...

Страница 13: ...cuando los valores MAX MIN y AVG no fueron borrados El almacenamiento simplemente empieza nuevamente donde se qued Presione y sostenga el bot n MIN MAX por 2 segundos y luego su ltelo para salir del m...

Страница 14: ...sipado en el cableado transformadores y sistemas de conexi n La mayor a de los amper metros en el mercado realizan mediciones del flujo de corriente promedio no flujo de corriente RMS reales a n si es...

Страница 15: ...ltiplos impares de la 3ra arm nica llamados TRIPLENS son particularmente agregadas juntas al neutro Estas arm nicas pueden ser de una corriente RMS total en el neutro del transformador que es normalm...

Страница 16: ...OLD para congelar la pantalla digital si es necesario 6 Paraatenuarlaslecturas presione el bot n SOFT CREST una vez SOFT se muestra en pantalla o para realizar mediciones de medio ciclo del pico de am...

Страница 17: ...durante 2 segundos 6 4 Transformadores de Distribuci n Se pueden realizar mediciones de corriente excesiva balanceo de cargas entre fases valor RMS y frecuencia de la corriente en el neutro Mediciones...

Страница 18: ...cho est n completamente cerradas o las mediciones no ser n precisas 3 Observe la pantalla para leer el valor de flujo de corriente de RMS verdaderos 4 Mida una fase de salida del controlador de motor...

Страница 19: ...s segundo Pantalla an loga Actualizaci n 20 veces segundo gr fica de barras an loga de 41 segmentos Di metro m ximo de conductor 51mm 2 00 Apertura m xima de quijadas 52mm 2 04 Voltaje m ximo del cond...

Страница 20: ...marks and battery life indication greater than 40 hours on meter power up 2 RMS Min Max ADD 10 counts 3 1A and above 30Hz 45Hz 4 AVG only 2 5A and above RMS Min Max Add 2 of reading Funci n Amperajes...

Страница 21: ...99 9V 0 1V 2 5 5 0 600V 0 1V 1 0 3 1 5 5 Voltaje CA Raz n de rechazo en modo com n 80dB CD a 60Hz Voltaje CD Raz n de rechazo en modo real 11dB at 50Hz o 60Hz Raz n de rechazo en modo com n 84dB at dc...

Страница 22: ...ALIGNMENT MARKS 26 5 HOW TO USE THIS METER 26 5 1 Battery replacement 5 2 Notes 5 3 Power up self test 5 4 Measuring AC Amperes 5 5 Measuring DC Amperes 5 6 Measuring frequency 5 7 Using data hold 5...

Страница 23: ...on the digital display Low battery indicator and battery life indicator at powerup using bar graph Auto power off after 10 minutes of inactivity and power lock to disable the automatic power off funct...

Страница 24: ...the live test lead before disconnecting the common test lead Be sure this Meter is in good operating condition During a continuity test a meter reading that goes from overflow OFL to 0 generally mean...

Страница 25: ...adings or Hz or V readings are softened out over 3 second intervals 22 K VHz Displayed when measuring resistance voltage or frequency 23 PEAK Displayed when current flow readings are in halfcycle peak...

Страница 26: ...overload 38 OFL Overflow Indication 4 ALIGNMENT MARKS Position the conductor within the jaws at the intersection of the indicated marks as much as possible Figure 1 in order to meet this Meter s accu...

Страница 27: ...re not readily apparent WARNING MOST OF THE TYPICAL APPLICATIONS ARE EXPOSED TO LETHAL VOLTAGES BE CAUTIOUS WHEN TAKING MEASUREMENTS BEFORE THE METER IS CONNECTED TO ANY CIRCUIT REVIEW THE SAFETY INFO...

Страница 28: ...beep sound and displays AUTO 5 5 Measuring DC Amperes Press the AC DC pushbutton to select the DC amperes measurement mode AC disappeared on the LCD but the meter is still in the autoranging mode AUTO...

Страница 29: ...or 2 seconds and then release in order to return to autoranging mode This Meter acknowledges with a beep sound and displays AUTO on the digital display Press the other function A or V or or pushbutton...

Страница 30: ...graph blinks and the digital display reads OFL AUTO autoranging is applied to the bar graph This Meter measures resistance by comparing the internal reference resistance given by a resistor array with...

Страница 31: ...e Observe that SOFT is displayed after pressing the SOFT CREST pushbutton once This SOFT mode digitally displays a running average of readings over 3 second interval to reduce the fluctuation of the r...

Страница 32: ...he CREST that is PEAK function is not available in the other V or Hz or modes To stop recording use the HOLD pushbutton Then RECORD no longer blinks and the values of MAX MIN and AVG are frozen Press...

Страница 33: ...splayed 6 MEASUREMENT APPLICATIONS 6 1 Non Linear Loads True RMS current flow is very important because it directly relates to the amount of heat dissipated in wiring transformers and system connectio...

Страница 34: ...particularly added together in the neutral These harmonics can go from a total rms current in the transformer s neutral wire that is normally 130 of the total rms current measured in any individual ph...

Страница 35: ...to view readings press the MIN MAX pushbutton 8 To clear RECORD press the MIN MAX pushbutton for 2 seconds 6 3 Motors You can measure starting inrush current running current and current imbalance Inr...

Страница 36: ...lay for true rms current flow Any significant flow with balanced phases indicates the presence of harmonic currents 7 Press the Hz pushbutton to measure the frequency of neutral wire Reading indicates...

Страница 37: ...er before use for cracks or missing portions of the insulating cover or for loose or weakened components Pay particular attention to the insulation surrounding the clamp jaws and clamp lever Any Meter...

Страница 38: ...stance 0 to 4K Continuity check Beep at approx 35 in the 400 range 8 2 Specifications Accuracy is given as of reading number of least significant digits at 18 C to 28 C with relative humidity up to 80...

Страница 39: ...n DC Current Range Resolution Accuracy 0 30 to 39 99A 0 01A 2 30 dgts 0 3 to 399 9A 0 1A 400 to 700A 1A 2 10 dgts Function AC Voltage TRUE RMS DC Voltage Range Resolution Accuracy AC VOLTAGE 45Hz to 6...

Страница 40: ...s casos a Cuando la herramienta se haya utilizado en condiciones distintas a las normales b Cuando el producto hubiera sido alterado de su composici n original o reparado por personas no autorizadas p...

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