MULTI-DMM MT-52 - Digital Multimeter VOLTCRAFT - Free user manual and instructions

USER MANUAL MULTI-DMM MT-52 VOLTCRAFT

These operating instructions belong with this product. They contain important information for putting it into service and operating it. This should be noted also when this product is passed on to a third party.

Therefore look after these operating instructions for future reference!

A list of contents with the corresponding page numbers can be found in the index on page 35.

Thank you for making the excellent decision to purchase this Voltcraft® product.

You have acquired a quality product from a brand family which has distinguished itself in the fields of measuring, charging and network technology thanks to its particular expertise and its continuous innovation.

With Voltcraft®, you will be able to cope even with difficult tasks as an ambitious hobbyist or as a professional user. Voltcraft® offers reliable technology and a great price-performance-ratio.

Therefore, we are absolutely sure: Starting to use Voltcraft will also be the beginning of a long, successful relationship.

Enjoy your new Voltcraft® product!

Table of Contents

Introduction 34

Intended Use 36

Operating Controls. 37

Safety Information 38

Product Description 40

Scope of Delivery 40

Display Indications and Symbols 41

Measuring 42

a) Switching on the Measuring Instrument 42

b) Voltage Measuring "V" 43

c) Current Measuring "A" 10 44

d) Resistance Measuring 46

e) Diode Test 47

f) Continuity test 47

g) Capacity Measuring 48

h) Contact-Free AC Voltage Detection "NCV" 49

i) Frequency Measuring 49

j) Pulse Width Measurement 50

k) Room Temperature and Humidity Measurement 50

I) Temperature Measurement with Contact Sensor 51

m) Noise Level Measurement 51

n) Lighting Measurement 52

RANGEButton 53

REL Key 54

Hz% Button .54

HOLDKey .54

MODEButton 54

Auto Power OFF Function 54

Display Illumination 54

Cleaning and Maintenance 55

General Information 55

Cleaning 55

Opening Meter 56

Replacing the Fuse 56

Inserting/Changing the Batteries 57

Disposal 58

Disposal of Used Batteries! 58

Troubleshooting 59

Technical Data 60

Intended Use

• Measuring and displaying electric parameters in the range of excess voltage category III (up to max. 600V against ground potential, pursuant to EN 61010-1) and all lower categories. The measuring device and equipment must not be used in the overvoltage category CAT IV (e.g. at the low voltage installation source.)
• Measurement of direct and alternating voltage up to a maximum of 600 V
  Measurement of direct and alternating current up to 10 A
• Measuring resistance values of up to 40 MΩ
• Continuity test (< 50 Ω acoustic)
• Diode Test
  Capacity measuring up to 100 F
  Frequency measurement up to 10 MHz
• Pulse width display in %
• Temperature measurement with external K-type sensor from -20 to +1300 °C
• Temperature measurement with internal sensor from 0 to +50^
• Measuring the relative air humidity form 33 - 99%
• Measuring the illumination strength up to 40 000 Lux
• Measuring the noise level of 35 - 100 dBC (for orientation measurement)
• Contact-free AC voltage detection "NCV"

The measurement functions are selected using the dial switch. Except for the environmental measuring ranges of temperature, humidity, noise level and illumination strength, automatic measuring range selection is active in all measuring ranges (autorange).

The two current measuring inputs are secured against overload with ceramic high-performance fuses. The voltage in the measuring circuit may not exceed 600 V.

The multimeter is operated with a common 9 V alkaline battery block. The device may only be operated with the specified batteries.

The measuring instrument must not be operated when it is open, i.e. with an open battery compartment or when the battery compartment cover is missing. Measuring in damp rooms or under unfavourable ambient conditions is not permitted. Unfavourable ambient conditions are:

• Wetness or high air humidity
• Dust and flammable gases, vapours or solvent,
• thunderstorms or similar conditions such as strong electrostatic fields etc.

For safety reasons, only use measuring cables or accessories which are adjusted to the specifications of the multimeter when measuring.

Any use other than that described above damages the product. Moreover, this is linked to dangers such as short circuits, fire, electric shock, etc. No part of the product may be modified or rebuilt!

Read the operating instructions carefully and keep them for later reference.

Always observe the safety instructions!

Operating Controls

(see fold-out page)

1 Display

A Main display with measuring unit and additional functions
B Symbol for battery change
C Permanent display of the relative air humidity in percent
D Permanent display of the air temperature in degrees Celsius

2 RANGE button
3 REL key
4 MODE button
5 Dial switch
6 10 A measuring jack
7 A/mA measuring jack
8 COM measuring jack (reference potential, "Minus")
9 VΩ measuring jack (with commensurability "Plus")
10 Light button for display lighting
11 Hz/% button for function switching in the voltage, power and frequency range
12 HOLD key
13 NVC lighted display for AC voltage detection
14 Sensor aperture for indoor air humidity measurement (relative humidity and temperature)
15 Light sensor
16 Sensor aperture for sound volume measurement
17 Clamp for measuring prod attachment
18 Battery compartment
19 Foldable mounting brackets

Safety Information

Please read through the operating instructions completely before using the product for the first time; they include important information necessary for correct operation.

The guarantee/warranty will be void if damage is incurred resulting from non-compliance with the operating instructions. We assume no liability for any consequential damage!

We do not assume any liability for property damage and personal injury caused by improper use or non-compliance with the safety instructions! In such cases the warranty/guarantee is void.

This device left the manufacture's factory in a safe and perfect condition.

We kindly request that you as a user observe the safety instructions and warnings contained in this operating manual to preserve this condition and to ensure safe operation!

Please pay attention to the following symbols:

An exclamation mark in a triangle shows important notes in these operating instructions that should be strictly observed.

The triangle containing a lightning symbol warns against danger of an electric shock or of the impairment of the electrical safety of the device.

The "hand" symbol informs you that there are special tips and hints concerning the operation.

This product has been CE-tested and meets the necessary European guidelines.

Class 2 insulation (double or reinforced insulation)

CAT II

Overvoltage category II for measurements on electric and electronic devices connected to the mains supply with a power plug. This category also covers all smaller categories (e.g. CAT I for measuring signal and control voltages).

CAT III

Overvoltage category III for measuring in building installation (e.g. outlets or sub-distribution). This category also covers all smaller categories (e.g. CAT II for measuring electronic devices).

Ground potential

The unauthorized conversion and/or modification of the product is inadmissible for reasons of safety and approval (CE).

Consult an expert when in doubt as to the operation, the safety or the connection of the device.

meters and accessories are not toys and have no place in the hands of children.

On industrial sites, the accident prevention regulations of the association of the industrial workers' society for electrical equipment and utilities must be followed.

In schools, training centres, computer and self-help workshops, handling of meters must be supervised by trained personnel in a responsible manner.

Before measuring voltages, always make sure that the meter is not set to a measuring range for currents.

The voltage between the measuring instrument connection points and earth must never exceed 600 V DC/AC in CAT III.

The measuring prods have to be removed from the measured object every time the measuring range is changed.

Be especially careful when dealing with voltages higher than 50 V AC or 75 V DC. Even at these voltages it is possible to receive a fatal electric shock if you touch electrical conductors.

Check the measuring device and its measuring leads for damage before each measurement. Never carry out any measurements if the protecting insulation is defective (torn, ripped off etc.)

To avoid electric shock, do not to touch the connections/measuring points directly or indirectly during measurements. During measuring, do not grip beyond the grip range markings (which you can feel) present on the measuring prods.

Do not use the multimeter just before, during or just after a thunderstorm (lightning! / high-energy overvoltage!). Please make sure that your hands, your shoes, your clothing, the floor, switches and switching components are dry.

Avoid operation in direct proximity to strong magnetic or electromagnetic fields, transmitter aerials or HF generators. This could affect the measurement.

If you have reason to believe that the device can no longer be operated safely, disconnect it immediately and make sure it is not unintentionally operated. It must be assumed that safe operation is no longer possible if:

• the device shows visible damage,
• the device no longer works and
• the device was stored under unfavourable conditions for a long period of time or
• after it was exposed to extraordinary stress caused by transport.

Do not switch the meter on immediately after it has been taken from a cold to a warm environment. The condensation that forms might destroy your device. Allow the device to reach room temperature before switching it on.

Do not leave the packaging material lying around carelessly since such materials can become dangerous toys in the hands of children.

You should also heed the safety instructions in each chapter of these instructions.

Product Description

The multimeter (referred to as DMM in the following) indicates measured values on the digital display. The measured value display of the DMM comprises 4000 counts (count = smallest display value). Voltage and current measurement is performed as an effective median value.

The measuring device includes 4 environmental measuring functions for relative humidity, temperature (air and sensor measurement), linear noise level (for orientation of noise sources) and strength of illumination. The lighting sensor includes an IR filter that only measures the visible light range.

The display can be lit for a if you are working in a badly lit environment.

If the DMM is not operated for approx. 30 minutes, it automatically switches off. This saves battery power and extends the period of operation. The meter can be used for do-it-yourself or for professional applications.

For better readability, the DMM can also be optimally mounted with the clip on the rear.

The measuring leads are equipped with transport protection caps at the plugs and measuring prods. Remove them before using the measuring leads.

Rotary control (4)

The individual measuring functions are selected via a rotary switch. The automatic range selection is active if the "auto" symbol is displayed. The appropriate range of measurement is set individually for each application. If the meter switch is set to "OFF", the meter is switched off. Always turn the device off when it is not in use.

Scope of Delivery

Multimeter

9V block battery

Safety measuring cable

Wire temperature sensor (K-type, measuring range -20 to 230^ )

K-type adapter

Operating instructions

Display Indications and Symbols

This is a summary of all possible symbols and information on the MT-52.

Auto	means "automatic measuring range selection"
Symbol for display illumination
Symbol for the integrated fuses
OL or I	Overload = the measuring range was exceeded
OFF	Switch position "Measuring device off"
Battery replacement symbol; please replace the batteries immediately to avoid measu- ring errors!
Symbol for the diode test
Symbol for the acoustic continuity tester
dBC	Symbol for noise level measuring range (C-characteristic = linear)
CAP	Capacity measuring range
AC	Alternating current for voltage and current
DC	Direct current for voltage and current
-	Polarity indication in case of minus potential
mV	Millivolt (exp.-3)
V	Volt (unit of electric potential difference or voltage)
μA	Microampere (exp.-6)
mA	Milliampere (exp.-3)
A	Ampere (unit of electric current)
Ω	Ohm (unit of electric impedance)
kΩ	Kilo Ohm (exp.3)
MΩ	Mega Ohm (exp.6)
Hz	Hertz (unit of frequency)
%	Pulse length in % (pulse pause)
°C	Temperature unit (°Celsius)
dB	Noise level unit (decibel)
Lux	Unit and measuring range of illumination strength

%RH Relative air humidity

nF Nanofarad (exp.-9), unit of electric capacity

F Microfarad (exp.-6)

mF Millifarad (exp.-3)

Measuring

Do not exceed the maximum permitted input values. Do not touch any circuits or parts of circuits if there could be voltages higher than 50 V ACrms or 75 V DC present within them. Danger to life!

Before measuring, check the connected measuring accessories for damage such as, for example, cuts, cracks or squeezing. Never use defective measuring equipment! Danger to life!

During measuring, do not grip beyond the tangible grip range markings present on the test prods.

Measuring is only permitted when the battery and fuse compartment is closed.

You may only connect the measuring leads to the measuring device that are required for measuring operation. Remove all measuring lines not required from the device for safety reasons.

As soon as "OL" or "I" (overload) appears on the display, you have exceeded the measuring range.

a) Switching on the Measuring Instrument

Turn the rotary control (4) to the corresponding measurement function. To switch off turn the rotary control to "OFF". Always turn the device off when it is not in use.

Prior to working with the meter, you have to insert the enclosed battery. Insertion and changing of the battery is described in the "Cleaning and Maintenance" chapter.

b) Voltage Measuring "V"

The voltage range "V AC/DC" shows an input resistance of >10MOhm

Proceed as follows to measure AC voltages "V-AC":

• Turn the DMM on and select measuring function "V~".
  Plug the red measuring lead into the V measuring socket (9) and the black measuring lead into the COM measuring socket (8).
• Now connect the two measuring prods to the object to be measured (power outlet, switch etc.).
• The currently measured value is indicated on the display
• After measuring, removing the measuring lines from the measured object and turn the DMM off.

Use the "Hz%" button (11) to switch the display to frequency (Hz) and pulse length (%). Each press switches the function. Autorange is deactivated.

The mV-AC measuring range can only be selected via manual measuring range selection ("RANGE" button).

Proceed as follows to measure "V-DC" direct voltages:

• Turn the DMM on and select measuring function "V=".
  Plug the red measuring lead into the V measuring socket (9) and the black measuring lead into the COM measuring socket (8).
  Now connect the two measuring prods to the object to be measured (battery, switch etc.). The red measuring tip indicates the positive pole, the black measuring tip the negative pole.
  The polarity of the respective measured value is indicated on the display together with the current measured value.

As soon as a minus " " appears for the direct voltage in front of the measured value, the measured voltage is negative (or the measuring tips have been mixed up).

• After measuring, remove the measuring lines from the measured object and turn the DMM off.

Use the "Hz%" button (11) to switch the display to frequency (Hz) and pulse length (%). Each press switches the function. Autorange is deactivated. This enables monitoring of possible ripple voltage (superimposed alternate voltage). In case of pure direct voltage, the frequency and % displays are "zero". Without a measured signal, phantom values may be displayed. They disappear when a direct voltage is measured.

c) Current Measuring "A" 10

The voltage in the measuring circuit may not exceed 600V

Do not measure any currents above 10 A in the 10A range and no currents above 400 mA in the A / mA range, otherwise the fuses trigger.

Measuring >5A may only be performed for max. 30 seconds and at 15 minute intervals.

Always start current measurements at the highest measurement range and switch down to lower ranges if necessary. Before changing the measurement range, always shut off the circuit. All current measuring ranges are secured with fuses and thus protected against overload.

Proceed as follows to measure "A-DC" direct current:

• Turn the DMM on and select measuring function "A".

The table shows the different measuring functions and possible measuring ranges. Select your measuring range and the respective measuring jacks. The display indicates "DC".

Measuring function	Measuring range	Measuring jacks
μA	<4000 μA	COM + mAμA
mA	4mA – 399 mA	COM + mAμA
10A	400 mA – 10 A	COM + 10A

• Insert the red measuring line into the A / mA or 10A measuring jack. Plug the black measuring line into the COM socket.
• Now connect the two measuring prods in series to the object to be measured (battery, switch etc.). The polarity of the respective measured value is indicated on the display together with the measured value.

When a minus " - appears in front of the measured value when measuring DC, the measured voltage is negative (or the measuring lines have been swapped).

After measuring, remove the measuring lines from the measured object and turn the DMM off.

Use the "Hz%" button (11) to switch the display to frequency (Hz) and pulse length (%). Each press switches the function. Autorange is deactivated. This enables monitoring of possible ripple signal (superimposed frequency). In case of pure direct current, the frequency and % displays are "zero". Without a measured signal, phantom values may be displayed. They disappear when a direct current is measured.

Proceed as follows to measure AC voltages "A-AC":

• Turn the DMM on and select measuring function "A".

The table shows the different measuring functions and possible measuring ranges. Select your measuring range and the respective measuring jacks. The display indicates "DC".

Measuring function	Measuring range	Measuring jacks
μA	<4000 μA	COM + mAμA
mA	4mA – 399 mA	COM + mAμA
A	400 mA – 10 A	COM + 10A

• Insert the red measuring line into the A / mA or 10A measuring jack. Plug the black measuring line into the COM socket.
• Press "MODE" to switch to the AC measuring range. "AC" appears in the display. Pressing this button again, takes you back etc.
• Now connect the two measuring prods in series to the object to be measured (power circuit, switch etc.). The measured value is indicated on the display The connection principle corresponds to DC measurement.
• After measuring, remove the measuring lines from the measured object and turn the DMM off.

Use the "Hz%" button (11) to switch the display to frequency (Hz) and pulse length (%). Each press switches the function. Autorange is deactivated.

d) Resistance Measuring

Make sure that all the circuit parts, switches and components and other objects of measurement are disconnected from the voltage and discharged.

• Turn the DMM on and select measuring function
  Plug the red measuring line into the measuring jack (9) and the black measuring line into the COM measuring jack (8).
• Check the measuring lines for continuity by connecting both measuring prods with one another. The resistance value must be approximately 0 - 0.5 Ohm (inherent resistance of the measuring lines).
  Now connect the measuring prods to the object to be measured. As long as the object to be measured is not high-Ohm or interrupted, the measured value will be indicated on the display. Wait until the displayed value has stabilised. With resistances of >1 MOhm, this may take a few seconds.
• If "OL" (overload) appears on the display, you have exceeded the measuring range or the measuring circuit has been broken.
• After measuring, remove the measuring lines from the measured object and turn the DMM off.

If you carry out a resistance measurement, make sure that the measuring points which you contact with the test prods are free from dirt, oil, solderable lacquer or the like. Such circumstances can falsify the measured result.

e) Diode Test

Make sure that all the circuit parts, switches and components and other objects of measurement are disconnected from the voltage and discharged.

Turn the DMM on and select measuring function.
Plug the red measuring lead into the V measuring socket (9) and the black measuring lead into the COM measuring socket (8).
- Press "MODE" button to switch measurement functions. The symbol for diode test now appears in the display. Pressing this button again takes you to the next measuring function.
- Check the measuring lines for continuity by connecting both measuring prods with one another. The value must be approximately 0V .
- Now connect the two measuring prods with the object to be measured (diode).
- The display shows the continuity voltage "UF" in volt (V). If "OL" appears, the diode is measured in reverse direction (UR) or the diode is defective (interruption). Perform a counter-pole measurement to check.
- After measuring, remove the measuring lines from the measured object and turn the DMM off.

f) Continuity test

Make sure that all the circuit parts, switches and components and other objects of measurement are disconnected from the voltage and discharged.

• Turn the DMM on and select measuring function ).
• Press "MODE" button twice to switch measurement functions. The symbol for continuity test now appears in the display. Pressing this button again takes you to the first measuring function etc.
  Plug the red measuring lead into the V measuring socket (9) and the black measuring lead into the COM measuring socket (8).
• A continuity value of less than 50 Ohm is identified as continuity; in this case a beep sounds. The impedance value is displayed up to 399.9 Ohm.
• If "OL" (overload) appears on the display, you have exceeded the measuring range or the measuring circuit has been broken.
• After measuring, removing the measuring lines from the measured object and turn the DMM off.

g) Capacity Measuring

Make sure that all the circuit parts, switches and components and other objects of measurement are disconnected from the voltage and discharged.

• Turn the DMM on and select measuring function "CAP".
• Plug the red measuring lead into the V measuring socket (9) and the black measuring lead into the COM measuring socket (8).
• Connect the measuring prods to the component.
• If "OL" (overload) appears on the display, you have exceeded the measuring range or the measuring circuit has been broken.
  After measuring, remove the measuring leads from the measuredobject and turn the DMM off.

Always observe correct polarity for electrolyte capacitors.

Make sure to use measuring leads that are as short as possible. Long measuring leads may cause measuring deviations.

h) Contact-Free AC Voltage Detection "NCV"

The "NCV" detector is placed on the top of the housing and reacts only to alternate voltages between 200 and 1000 V/AC.

This function is only used for quick search for alternate voltage-conducting lines and cables. For work at the power lines, freedom from voltage must be verified with the traditional contact test method (phase tester)!

• The measuring leads are not required.
• Turn on the DMM and select any measuring function. Contact-free voltage detection is active in all measuring functions.
• Move the DMM with the "NCV" sensor (upper housing edge) along the test object. The detection depth reaches from approx. 3 cm at 230 V/AC to approx. 8 cm at 1000 V/AC.
• Where a live line is discovered, the "NCV" lighted display (13) lights up.
• Switch off DMM after measuring.

Shielded lines, lines that are too deep or twisted wires may negatively influence the display.

i) Frequency Measuring

• Turn the DMM on and select measuring function "Hz".
  Plug the red measuring lead into the V measuring socket (9) and the black measuring lead into the COM measuring socket (8).
• Now connect the two measuring prods to the object to be measured (generator, signal, etc.).
• The currently measured value is indicated on the display
• After measuring, removing the measuring lines from the measured object and turn the DMM off.

j) Pulse Width Measurement

Pulse width measurement enables measuring of the positive hal-wave of a measuring signal. The ratio of the positive halfwave to the total signal is displayed. For symmetrical signals (e.g. sinus), the positive and negative half-waves are the same length. The display shows approx. 50% .

• Turn the DMM on and select measuring function "Hz".
• Plug the red measuring lead into the V measuring socket (9) and the black measuring lead into the COM measuring socket (8).
• Press "MODE" button to switch measurement functions. The symbol "%" appears in the display. Pressing this button again takes you to the first measuring function etc.
• Now connect the two measuring prods to the object to be measured (generator, signal, etc.).
• The currently measured value is indicated on the display
  After measuring, remove the measuring lines from the measured object and turn the DMM off.

k) Room Temperature and Humidity Measurement

The DMM enables measuring the room temperature and relative humidity via firmly installed sensors. The two measured values are permanently displayed in the upper display area in measuring operation.

The sensors are located inside the device and react to changes of the measured value with delays. Wait for at least 30 minutes until the device has adjusted to the ambience conditions. We recommend waiting for approx. 2 hours to ensure precise measured values.

Proceed as follows for the measurement:

• The measuring leads are not required.
• Turn on the DMM and select any measuring function.
• In the upper left, the display shows the relative humidity in "%RH" and in the upper right the room temperature in "°C".
• Wait until the displayed value has stabilised. This may take up to 2 hours.
• Switch off DMM after measuring.

%RH

The long measuring time due to the build may cause deviations between the displayed and the "actual" temperature and humidity in case of short measuring durations. Therefore, this product must not be used for very exact measurements (e.g. quality-control climate monitoring, etc.).

I) Temperature Measurement with Contact Sensor

Contact measurement is only permissible with powered-down objects. Danger of electric shock!

Due to its build, the included wire sensor is only designed for a measuring range between -20 and +230^ . With optional K-type thermal sensors, the complete measuring range of the DMM can be used.

Proceed as follows for the measurement:

• Switch on the DMM and select the measuring range according to desired resolution: "1 °C" or "0.1 C".
• Connect the K-type measuring adapter to the "V" (+) and "COM" (-) in the correct polarity.
• Connect the sensor to the measuring adapter in the correct polarity. The polarity is marked on the plug.
• guide the measuring prod to the object to be measured. The measuredvalue is shown in the main display in ^ C
• Switch off DMM after measuring.

The measured temperature must only be applied to the measuring prod. The measuring device must be in the specified environment to prevent measuring errors.

m) Noise Level Measurement

The sound level measurement is used as an orientation measurement to identify sources of sound. Evaluating measurement for documentation, etc. is not possible. The sound level is measured linearly (characteristic "C"), i.e. all sounds (low and high ones) are assessed equally. Thus, you will receive frequency-independent measured values that make comparison easier.

The measuring aperture for sound is at the upper left (16). During measurement, the measuring device should be aligned at a right angle to the sound source.

Always wear hearing protection when working in loud environments to prevent damage to your hearing.

Proceed as follows for the measurement:

• The measuring leads are not required.
• Turn the DMM on and select measuring function "dBC".
  Align the DMM with the measuring aperture (16) towards the sound source. Min. distance 1 m.
• The measuring value is shown on the main display.
• Switch off DMM after measuring.

Strong wind (>10m / s) may negatively influence the measuring result.

n) Lighting Measurement

The lighting measurement is used to verify the light conditions in living and work rooks, etc. The light sensor includes a spectral filter that only lets through visible light for measurement

The lighting sensor is placed at the centre top (15). During measurement, the measuring device should be aligned at a right angle to the light source.

Do not look into any bright light sources. This may lead to visual impairment. Keep sufficient distance between the DMM and hot sources of light.

Proceed as follows for the measurement:

• The measuring leads are not required.
• Turn the DMM on and select measuring function "Lux".
  Align the DMM with the light sensor (15) towards the light source.
• The measuring value is shown on the main display. When only the middle display segment shows "1", the measuring range was exceeded. Switch to the next measuring function "Lux x10" with the dial switch. The indicated measured value now has to be multiplied by 10.
• Switch off DMM after measuring.

The included table shows the recommended lighting strengths according to the indications of the international commission for lighting.

Place:	Recommended illumination strength in Lux:
Office
Meeting room	200 - 750
Writing room	700 - 1500
Technical drawing	1000 - 2000
Factory
Goods receipt, packing	150 - 300
Visual inspection in production lines	300 - 750
Inspection work	750 - 1500
Assembly line	1500 - 3000
Hotel
Entrance area, wardrobe	100 - 200
Reception area, cash point	200 - 1000
Shop
Staircase	150 - 200
Shop window area	750 - 1500
Hospital
Hospital room, storage	100 - 200
Examination room	300 - 750
Surgical theatre, emergency room	750 - 1500
School
Lecture room, assembly hall	100 - 300
Classroom	200 - 750
Crafts and drawing rooms	500 - 1500

RANGE button

The RANGE button enables manual measuring range selection in the voltage, current and impedance measuring functions. This button is not active in any other measuring functions.

Every time it is pressed, the auto range function is deactivated (display "Auto" goes out) and switches to the next higher measuring range. After the largest measuring range, it starts again with the smallest one. For switching off the manual measuring range selection, keep the "RANGE" button pressed for approx. 2s. The display shows "Auto" again.

REL key

The REL key enables reference value measuring. The indicated measuring resistance can be reset to zero, e.g. to avoid including the resistance of for measuring leads in low-ohmic measurements.

Every time it is pressed, the auto range function is deactivated (display "Auto" goes out) The symbol "REL" is displayed.

To turn the REL function off, press "REL." To activate the autorange function, keep the "RANGE" button pressed for approx. 2s. The display shows "Auto" again.

Hz% Key

The Hz% key enables direct switching to the frequency display in voltage and current measuring areas. Press again to switch to pulse measurement 90^ .Press again to switch back to normal mode. Each press switches the function.

In the "Hz" measuring function, this button is used to switch to the pulse measurement %

HOLD Button

The HOLD button makes it possible to manually capture the currently measured value. When the function is active, the display shows "HOLD". Pressing the button again switches the function off again.

MODE Button

The MODE button makes it possible to skip through subfunctions. Each press switches the function.

• During current measurement ( A, mA, 10A) , the device switches from AC (alternate current) to DC (direct current).
• From resistance measurement, the device switches to diode measurement and acoustic continuity test.

Auto power OFF function

The DMM turns off automatically after approx. 30 minutes if no button or rotary switch is operated. This function protects the battery, saves battery power and extends the service life.

To reactivate the DMM after automatic shutdown, use the rotary switch or press any button (apart from the light button (10)).

Display illumination

The display can be lit if you are working in a badly lit environment. To switch it on or off, press the "..." (10) button in measuring operation. Lighting remains on until it is deactivated manually or the DMM switches off automatically after approx. 30 minutes.

Cleaning and Maintenance

General Information

To ensure the accuracy of the multimeter over an extended period of time, it should be calibrated once a year.

Apart from occasional cleaning and fuse replacements, the meter requires no servicing.

Information on changing the battery and fuse is provided below.

Regularly check the technical safety of the instrument and measuring leads, e.g. check for damage to the housing or squashing etc.

Cleaning

Always observe the following safety instructions before cleaning the device:

Live components may be exposed if covers are opened or parts are removed (unless this can be done without tools).

The connected lines must be disconnected from the measuring device and all measuring objects prior to cleaning or repairing the device. Switch off the DMM.

Do not use any carbon-containing cleaning agents or petrol, alcohol or the like to clean the product. These could corrode the surface of the meter. Furthermore, the fumes are hazardous to your health and explosive. Moreover, you should not use sharp-edged tools, screwdrivers or metal brushes or similar for cleaning.

When cleaning the device or the display and the measuring lines, use a clean, lint-free, antistatic, slightly damp cloth. Allow the product to dry completely before you use it again to conduct measurements.

Opening Meter

The connected lines must be disconnected from the measuring device and all measuring objects before the device is opened. Switch off the DMM.

Proceed as follows to open it:

• Disconnect all measuring leads from the meter and switch it off.
• Unscrew and remove the two rear battery compartment screws (18).
  Pull the battery cover (18) from the measuring device at a 90^ angle.
• This battery compartment is now accessible.
• Remove the mounting bracket ad remove all six housing screws.
• Draw the housing apart parallel. Make sure that it does not catch.
• The fuses can be accessed now.
• Close the housing again in the reverse order and screw the battery and fuse compartment closed.
• The meter is ready for use once again.

Replacing the Fuse

The current measuring ranges are protected by high-performance fuses. If measuring in this range is no longer possible, you have to change the fuse.

Proceed as follows for fuse replacement:

• Separate the connected measuring lines from the measuring circuit and the measuring device. Switch off the DMM.
• Open the housing as described in chapter "Opening the Measuring Device".
• Replace the defective fuse with a new fuse of the same type and nominal voltage. The fuses have the following values:

Fuse	F1	F2
Value	FF 500 mA 660V	F10AH 600V
Dimensions	5 x 20 mm	6.3 x 32 mm

• Now close the housing again carefully.

Using mended fuses or bridging the fuse holder is not permitted for safety reasons. It may cause fires or arc explosions. Never operate the meter when it is open.

Inserting and Changing the Batteries

Operation of the measuring device requires a 9V battery (e.g. 1604A). You need to insert a new, charged battery prior to initial operation or when the battery change symbol appears on the display.

Proceed as follows to insert or change the batteries:

• Separate the connected measuring lines from the measuring circuit and the measuring device. Switch off the DMM.
• Open the housing as described in chapter "Opening the Measuring Device".
• Replace the flat batteries with new one of the same type. Place a new battery into the battery compartment (18), observing the correct polarity. Observe the correct polarity indicated in the battery compartment.
• Now close the housing again carefully.

Never operate the measurement device when it is open. !RISK OF FATAL INJURY!

Do not leave flat batteries in the device. Even batteries protected against leaking can corrode and thus release chemicals which may be detrimental to your health or destroy the battery compartment.

Do not leave batteries lying around carelessly. They could be swallowed by children or pets. If swallowed, consult a doctor immediately.

Remove the batteries if the device is not used for longer periods of time to prevent leaking.

Leaking or damaged batteries may cause alkali burns if they come in contact with the skin. Therefore, use suitable protective gloves.

Make sure that the batteries are not short-circuited. Do not throw batteries into the fire.

Batteries must not be recharged or dismantled. Danger of explosion!

You can order suitable alkaline batteries stating the following order no.:

Item no. 65 25 09 (please order one).

Only use alkaline batteries, as they are powerful and have a long service life.

Disposal

Old electronic devices are recyclable and should not be disposed of in the household waste. At the end of its service life, dispose of the product at the community collection point according to the relevant statutory regulations. It is prohibited to dispose of the device in the household waste.

Disposal of Flat Batteries.

As a consumer you are legally required (Battery Ordinance) to responsibly dispose of all used batteries and rechargeable batteries; it is forbidden to throw them away with the normal household waste!

Batteries containing toxic substances are marked with the symbols shown, which indicate they cannot be disposed of in the household waste. The descriptions for the respective heavy metal are: Cd = cadmium, Hg = mercury, Pb = lead. You can return used batteries/rechargeable batteries free of charge at the official collection points of your community, in our stores, or wherever batteries/rechargeable batteries are sold!

You thus fulfil the legal requirements and contribute to protecting the environment!

Troubleshooting

In purchasing the DMM, you have acquired a product which has been designed to the state of the art and is operationally reliable. Nevertheless, problems or errors may occur. For this reason, the following is a description of how you can eliminate possible malfunctions yourself.

Always follow the safety instructions!

Error	Possible cause	Remedy
The multimeter does not work.	Is the battery dead?	Check the status. Replace batteries.
No measured value change.	Is a wrong measuring function activated (AC/DC)?	Check the display (AC/DC) and switch the function if applicable.
	Did you use the wrong measuring sockets?	Compare the connection with the information from the operating instructions.
	Is the fuse defect?	Check the fuses.
	Is the "HOLD" function activated?	Press the "HOLD" button.

Repairs other than those described above may only be carried out by an authorised specialist. If you have queries about handling the measuring device, our technical support is available under the following telephone number:

Voltcraft, 92242 Hirschau, Lindenweg 15, Tel-No. 0180/586,5827.

Technical Data

Symbol 4000 counts

Measuring rate Approx. 3 measuring operations/second

measuring line length.. Approx. 80 cm each

Measuring impedance. >10MΩ (V range)

Operating voltage .9V block battery

Working conditions. 0 - 40^ (< 70%)

Operating altitude. max. 3,000 m

Storage temperature. -10^ to +60^ (< 80%) rF

Weight approx. 335 g

Dimensions (LxWxH) 170 x 78 x 48 (mm)

Over-voltage category .CAT III 600 V, Impurity level 2

Measurement tolerances

Statement of accuracy in ± (% of reading + display error in counts (= number of smallest points)). The accuracy is valid for one year at a temperature of +23^ ± 5^ , and at a relative humidity of less than 70% , non-condensing.

Direct voltage (DC)

Range	Resolution:	Accuracy
400 mV	0.1 mV	±(1,0 % + 4)
4 V	0.001 V
40 V	0.01 V
400 V	0.1 V	±(1,5% + 4)
600 V	1 V
Other Features	Overload protection 600 V

Alternate voltage (AC)

Range	Resolution:	Accuracy
400 mV	0.1 mV	±(1,5% + 15)
4 V	0.001 V	±(1,0% + 4)
40 V	0.01 V
400 V	0.1 V	±(1,5% + 4)
600 V	1 V	±(2,0% + 4)
Other Features	Frequency range 50 – 400 Hz; Effective average value with sinus voltage; overload protection 600 V 400 mV area only through manual area selection!

Direct current (DC)

Range	Resolution:	Accuracy
400 μA	0.1 μA	±(1,0% + 2)
4000 μA	1 μA
40 mA	0.01 mA
400 mA	0.1 mA	±(1,2% + 2)
10 A	0.01 A	±(2,0% + 5)
Other Features	Overload protection: Fuses;500 mA 660 V, 10 A 600 V; Measuring time limit > 5 A: max. 30 s with 15 min break

Alternate current (AC)

Range	Resolution:	Accuracy
400 μA	0.1 μA	±(1,2% + 2)
4000 μA	1 μA
40 mA	0.01 mA
400 mA	0.1 mA	±(1,5% + 2)
10 A	0.01 A	±(2,0% + 5)
Other Features	Overload protection: Fuses;500 mA 660 V, 10 A 600 V; Measuring time limit > 5 A: max. 30 s with 15 min break; frequency range 50 - 400 Hz

Resistance

Range	Resolution:	Accuracy
400 Ω	0.1 Ω	±(1,5% + 4)
4 kΩ	0.001 kΩ	±(1,5% + 2)
40 kΩ	0.01 kΩ
400 kΩ	0.1 kΩ
4 MΩ	0.001 MΩ	±(2,0% + 2)
40 MΩ	0.01 MΩ	±(2,5% + 2)
Other Features	Overload protection 600V; Measuring voltage: approx. 0.28 V

Capacity

Range	Resolution:	Accuracy
50 nF	0.01 nF	±(5,0% + 20)
500 nF	0.1 nF	±(3,0% + 5)
5 μF	0.001 μF
50 μF	0.01 μF
100 μF	0.1 μF	±(4,0% + 5)
Other Features	Overload protection 600 V

Frequency

Range	Resolution:	Accuracy
5 Hz	0.001 Hz	±(1,2% + 3)
50 Hz	0.01 Hz
500 Hz	0.1 Hz
5 kHz	0.001 kHz
50 kHz	0.01 kHz
500 kHz	0.1 kHz
10 MHz	0.01 MHz	±(1,5% + 4)
Other Features	Overload protection 600 V; sensitivity: <1 MHz: >0.5 V; >1 MHz: >3 V

Temperature contact sensor type K

Range	Resolution:	Accuracy
-20 to +400 °C	0.1 °C	±(3,0% + 3)
-20 to +1300 °C	1 °C

Relative temperature and relative air humidity:

Range	Resolution:	Accuracy
0 to +50 °C	0.1 °C	±(3,0% + 3)
33 - 99 %rF	1 %rF	±(3,0% + 5)

Illumination strength

Range	Resolution:	Accuracy
4000 lux	1 lux	±(5% + 10)
40000 lux	10 lux	±(3,0% + 5)
Colour temperature accuracy of 2856 K; repetition accuracy ± 2%; Temperature stability: ±0.1 % per °C; light sensor: Silicium photo diode with spectral filter

Sound level

Range	Resolution:	Accuracy
35 – 100 dB	0.1 dB	±5 dB
Accuracy at 94 dB and 1 kHz sinus; frequency range: 30 Hz – 10 kHz; Assessment: Characteristic “C” (linear); time assessment: Fast; Microphone: Condenser microphone

Diode Test

Test voltage	approx. 1.5 V
Test current	approx. 1 mA
Resolution:	0.001 V
Accuracy	±(10% + 5)
Overload protection: 600 V

Acoustic continuity tester

<100 Ω continuous sound, test voltage approx 0.5 V, overload protection 600 V

NCV: Detection range: 200 - 1,000 V/AC

Do not exceed the maximum permitted input values. Do not touch any circuits or parts of circuits if they can have higher voltages than 25 V Acrms or 35 V DC. Danger to life!

Introduction

Cher client,

Tension continue (CC)

Plage	Résolution	Précision
400 mV	0,1 mV	±(1,0 % + 4)
4 V	0,001 V
40 V	0,01 V
400 V	0,1 V	±(1,5% + 4)
600 V	1 V
Divers	Protection contre la surcharge 600 V

Tension alternative (CA)

Courant continu (CC)

Plage	Résolution	Precision
400 μA	0,1 μA	±(1,0% + 2)
4000 μA	1 μA
40 mA	0,01 mA
400 mA	0,1 mA	±(1,2% + 2)
10 A	0,01 A	±(2,0% + 5)
Divers	Protection contre la surcharge : fusibles ; 500 mA 660 V, 10 A 600 V Limitation de la durée de mesure >5 A : max. 30 s et pause de 15 min.

Courant alternatif (CA)

c) Stroommeting "A" 104

d) Weerstandsmeting 106

e) Diodetest 107

f) Doorgangstest 107

Copyright 2010 by Voltcraft

GB Impressum/legal notice in our operating instructions

These operating instructions are a publication by Volcraft, Lindenweg 15, D-92242 Hirschau/Germany. Phone [phone] (www.volcraft.de).

All rights including translation reserved. Reproduction by any method, e.g. photocop, microfilming, or the capture in electronic data processing systems require the prior written approval by the editor. Reprinting, also in part, is prohibited.

These operating instructions represent the technical status at the time of printing. Changes in technology and equipment reserved.

© Copyright 2010 by Voltcraft®

© Copyright 2010 by Voltcraft®

© Copyright 2010 by Voltcraft®

V1_0910_01/AB