Extech Instruments MP510A Manuale utente

User’s Guide

MultiPro™ Digital MultiMeter Series

With PC Interface

Models:

MP510A

MP530A

00 1 21 3 42 84 9 1055637

actoolsupply.com

Extech MP530A MultiPro High Performance True RMS Digital MultiMeter

Extech MP530A-NIST MultiPro High Performance True RMS Digital MultiMeter

Extech MP530 MP 530 MultiPro High Performance True RMS MultiMeter

1) SAFETY

Terms in this manual

WARNING identifies conditions and actions that could result in serious injury or even

death to the user.

CAUTION identifies conditions and actions that could cause damage or malfunction

in the instrument.

This manual contains information and warnings that must be followed for operating the

instrument safely and maintaining the instrument in a safe operating condition. If the

instrument is used in a manner not specified by the manufacturer, the protection

provided by the instrument may be impaired. The meter is intended only for indoor use.

The meter protection rating, against the users, is double insulation per IEC61010-1 2nd

Ed., EN61010-1 2nd Ed., UL61010-1 2nd Ed. and CAN/CSA C22.2 No. 61010.1-0.92

to Category III 1000 Volts AC & DC and Category IV 600 Volts AC & DC.

Terminals (to COM) measurement category:

V / A / mAμA : Category III 1000 Volts AC & DC, and Category IV 600 Volts AC & DC.

Per IEC61010-1 2nd Ed. (2001) Measurement Category

Measurement Category IV (CAT IV) is for measurements performed at the source of

the low-voltage installation. Examples are electricity meters and measurements on

primary overcurrent protection devices and ripple control units.

Measurement Category III (CAT III) is for measurements performed in the building

installation. Examples are measurements on distribution boards, circuit- breakers,

wiring, including cables, bus-bars, junction boxes, switches, socket-outlets in the fixed

installation, and equipment for industrial use and some other equipment, for example,

stationary motors with permanent connection to the fixed installation.

Measurement Category II (CAT II) is for measurements performed on circuits directly

connected to the low voltage installation. Examples are measurements on household

appliances, portable tools and similar equipment.

WARNING

To reduce the risk of fire or electric shock, do not expose this product to rain or

moisture. To avoid electrical shock hazard, observe the proper safety precautions

when working with voltages above 60 VDC or 30 VAC rms. These voltage levels pose

a potential shock hazard to the user. Do not touch test lead tips or the circuit being

tested while power is applied to the circuit being measured. Keep your fingers behind

the finger guards of the test leads during measurement. Inspect test leads, connectors,

and probes for damaged insulation or exposed metal before using the instrument. If

any defects are found, replace them immediately. Do not measure any current that

exceeds the current rating of the protection fuse. Do not attempt a current

measurement to any circuit where 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 inserted into the

μA/mA or A input jack. Only replace the blown fuse with the proper rating as specified

in this manual.

CAUTION

Disconnect the test leads from the test points before changing functions. Always set

the instrument to the highest range and work downward for an unknown value when

using manual ranging mode.

INTERNATIONAL ELECTRICAL SYMBOLS

!Caution ! Refer to the explanation in this Manual

Caution ! Risk of electric shock

Earth (Ground)

Double Insulation or Reinforced insulation

Fuse

AC--Alternating Current

DC--Direct Current

2) CENELEC DIRECTIVES

The instruments conform to CENELEC Low-voltage directive 2006/95/EC and

Electromagnetic compatibility directive 2004/108/EC

3) PRODUCT DESCRIPTION

Panel Illustration

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1) 5000 count LCD display

2) Push-buttons for special

functions & features

3) Selector to turn the

Power On or Off and Select

a function

4) Input Jack for 10A (20A

for 30sec) current function

5) Input Jack for all

functions EXCEPT current

(μA, mA, A) functions

6) Common (Ground

reference) Input Jack for all

functions

7) Input Jack for milli-amp

and micro-amp current

functions

Analog bar-graph

The analog bar graph provides a visual indication of measurement like a traditional

analog meter needle. It is excellent for detecting faulty contacts, identifying

potentiometer clicks, and indicating signal spikes during adjustments.

Average sensing RMS calibrated

RMS (Root-Mean-Square) is the term used to describe the effective or equivalent DC

value of an AC signal. Most digital multimeters use average sensing RMS calibrated

technique to measure RMS values of AC signals. This technique is to obtain the

average value by rectifying and filtering the AC signal. The average value is then

scaled upward (calibrated) to read the RMS value of a sine wave. In measuring pure

sinusoidal waveforms, this technique is fast, accurate and cost effective. In measuring

non-sinusoidal waveforms, however, significant errors can be introduced because of

different scaling factors relating average to RMS values.

True RMS

True RMS is a term which identifies a DMM that responds accurately to the effective

RMS value regardless of the waveforms such as: square, sawtooth, triangle, pulse

trains, spikes, as well as distorted waveforms with the presence of harmonics.

Harmonics may cause :

1)Overheating in transformers, generators and motors

Circuit breakers to trip prematurely

3)Fuses to blow

4)Neutrals to overheat due to the triplen harmonics present on the neutral

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 a True RMS DMM. A pure

sinusoidal waveform has a Crest Factor of 1.4. A badly distorted sinusoidal waveform

normally has a much higher Crest Factor.

NMRR (Normal Mode Rejection Ratio)

NMRR is the DMM's ability to reject unwanted AC noise effects that can cause

inaccurate DC measurements. NMRR is typically specified in terms of dB (decibel).

This series has a NMRR specification of >60dB at 50 and 60Hz, which means a good

ability to reject the effect of AC noise in DC measurements.

CMRR (Common Mode Rejection Ratio)

Common mode voltage is voltage present on both the COM and VOLTAGE input

terminals of a DMM, with respect to ground. CMRR is the DMM's ability to reject

common mode voltage effect that can cause digit rolling or offset in voltage

measurements. This series has a CMRR specification of >60dB at DC to 60Hz in ACV

function; and >120dB at DC, 50 and 60Hz in DCV function. If neither NMRR nor CMRR

specification is specified, a DMM's performance will be uncertain.

4) OPERATION

CAUTION

Before and after hazardous voltage measurements, test the voltage function on a

known source such as line voltage to determine proper meter functioning.

DC Voltage, AC Voltage, & Hz Frequency functions

mV function defaults at DC. Press SELECT button momentarily to select AC. Press the

Hz push-button momentarily to activate or to exit Hz.

AA A

DCV ACV Hz

Note: Input sensitivity varies automatically with function range selected before activating

the Hz function. mV function has the highest (300mV) and the 1000V range has the

lowest (300V). It is recommended to first measure the signal voltage (or current) level

then activate the Hz function in that voltage (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, select lower

sensitivity to avoid electrical noise. If the reading shows zero, select higher sensitivity.

Capacitance, Diode test function

Default at . Press SELECT button momentarily to select Diode test function.

CAUTION

Discharge capacitors before making any measurement. Large value capacitors should

be discharged through an appropriate resistance load.

Normal forward voltage drop (forward biased) for a good silicon diode is between

0.400V to 0.900V. A higher reading indicates a leaky diode (defective). A zero reading

indicates a shorted diode (defective). An OL indicates an open diode (defective).

Reverse the test leads connections (reverse biased) across the diode. The digital

display shows OL if the diode is good. Any other readings indicate the diode is resistive

or shorted (defective).

A A A

Forward Bias Reverse Bias

Cap Diode Diode

Temperature function (Model MP530 only)

Press SELECT button momentarily to toggle between °C and °F readings, and the new

setting will be saved automatically in the non-volatile memory as power up default.

A A

K-temp K-temp

Note: Be sure to insert the banana plug K-type temperature bead probe with correct

polarities.

ΩResistance, Continuity functions

Default at Ω. Press SELECT button momentarily to select Continuity function,

convenient for checking wiring connections and operation of switches. A continuous

beep tone indicates a complete wire.

A A

CAUTION

Using resistance and continuity function in a live circuit will produce false results and

may damage the instrument. In many cases the suspected component must be

disconnected from the circuit to obtain an accurate reading

Auto leads resistance calibration

When entering the 50Ωrange manually by RANGE button for high precision low

resistance measurement, this feature will prompt to short the inputs for calibration. The

display shows “Shrt”. Simply short the leads for 3 seconds until the display shows zero,

then the resistance in the leads and in the internal protection circuitry of the meter is

compensated automatically. The compensation value can be as much as 5Ω. If a

compensation value that is higher than that is needed, Relative mode is recommended.

The shortcut is to short the test leads in auto-ranging resistance mode until the meter

enters the lowest 50

range automatically, press the RANGE button momentarily to

get the “Shrt” prompt, then wait 3 more seconds until the display shows zero.

Note: The calibration stays until the range is changed, the function is changed, or auto-

ranging mode is selected.

ΩΩ

3 Sec

μA, mA, and A Current functions

Default at DC. Press SELECT button momentarily to select AC.

*Note: When measuring a 3-phase system, special attention should be taken to the

phase-to-phase voltage which is significantly higher than the phase-to-earth voltage.

To avoid exceeding the voltage rating of the protection fuse(s) accidentally, always

consider the phase-to-phase voltage as the working voltage for the protection fuse(s).

PC-COMM computer interface capabilities

The instruments are equipped with an optical isolated interface port at the meter back

for data communication. An optional PC interface kit is required to connect the meter to

the PC computer.

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