VC272 - Multimeter VOLTCRAFT - Free user manual and instructions

USER MANUAL VC272 VOLTCRAFT

Kilo-Symbol (Exp. 3)

16 Troubleshooting ...........................................................................................90 17 Technical data ..............................................................................................9153 2 Introduction Dear customer, Thank you for purchasing this product. These operating instructions are part of this product. They contain im- portant notes on commissioning and handling. Also consider this if you pass on the product to any third party. Therefore, retain these operating instructions for reference! If there are any technical questions, please contact: www.conrad.com/contact 3 Delivery content

2x safety test leads with CAT III protective caps

Temperature sensor (-40 to +230 °C, type K, jack connector)

Operating instructions 4 Up-to-date operating instructions Download the latest operating instructions at www.conrad.com/downloads or scan the QR code shown. Follow the instructions on the website.54 5 Description of symbols The symbol warns of hazards that can lead to personal injury. The symbol warns of dangerous voltage that can lead to personal injury by electric shock. The arrow symbol indicates special information and advice on how to use the product. This product has been CE tested and complies with the necessary na- tional and European regulations. This device is UK conformity assessed and meets applicable Great Brit- ain directives. Protection class 2 (double or reinforced insulation, protective insulation) CAT II It is applicable to test and measuring circuits connected directly to utiliza- tion points (socket outlets and similar points) of the low-voltage MAINS installation. CAT III It is applicable to test and measuring circuits connected to the distribution part of the building’s low-voltage MAINS installation. CAT IV Measurement Category IV: For measuring at the origin of a low-voltage installation (e.g. mains distribution, electricity provider’s transfer points to homes) and outdoors (e.g. when conducting tasks on underground ca- bles or overhead lines). This category also includes all lower categories. Measuring in CAT IV is only permitted with test prods with a maximum free contact length of 4 mm or with cover caps over the test prods. Earth potential Direct current Alternating current55 6 Intended use

Complies with the EN 61010-1 and EN 61010-2-033 standards and all lower categories.

Measures direct and alternating voltages up to 600 V

Measures direct and alternating currents up to 10 A

Frequency measuring up to 10 MHz

Measures capacitance up to 60 mF

Measures resistance up to 60 MΩ

Measures temperatures from -40 to +1000 °C

Non-contact V/AC voltage detection (NCV) The measurement modes are selected using the rotary dial. In many measurement ranges, measurement range selection is automatic (except for continuity testing, diode testing and current measurement ranges). Effective (True RMS) measurements are displayed when measuring AC voltages/ currents with a frequency of up to 400 Hz. This ensures that sinusoidal and non- sinusoidal voltage/currents are measured accurately. Negative polarity readings are indicated with the (-) sign. The 10 A current measurement input is equipped with a ceramic high-performance fuse to protect against overloading. The voltage in the measurement circuit must not exceed 600 V. The mA/µA measurement input is equipped with 2x maintenance-free self-resetting PTC fuse and one ceramic tube fuse, which can be used in the case of conventional overload misoperation of less than about 5A, the current is limited and the meter is well protected. When the meter is being used for mA/µA measurement, but the meter is mistakenly connected to a high-energy high-voltage power supply, then the ceramic tube fuse will work and probably blow to protect the meter. In such case, the blown ceramic tube fuse is required to be replaced by a new one.56 A low-impedance mode (LoZ) enables voltage measurement with reduced internal resistance. This suppresses phantom voltages, which may occur in high-impedance measurements. Measurement with reduced impedance is only permissible in meas- urement circuits of up to 250 V and for up to 3 s. Only use batteries of the specied type. Rechargeable batteries have a lower capac- ity and should not be used. The device switches off automatically after 15 minutes if no buttons are pressed. This prevents the battery from draining. This automatic shut-off function can be disabled. Do not use the multimeter when the battery compartment is open or when the bat- tery compartment cover is missing. Do not take measurements in potentially explosive areas, damp rooms or adverse conditions. Adverse conditions include: Moisture or high humidity, dust and am- mable gases, vapours or solvents, thunderstorms and strong electromagnetic elds. For safety reasons, only use test leads or accessories that match the multimeter’s specications and meet IEC/EN 61010-031 standards.57 7 Safety instructions Read the operating instructions carefully and especially observe the safety information. If you do not follow the safety instructions and information on proper handling in this manual, we assume no liability for any resulting personal injury or damage to property. Such cases will invalidate the warranty/guarantee.

This device was shipped in a safe condition.

We kindly request the user to observe the safety instructions and warnings con- tained in the enclosed operating instructions so this condition is maintained and to ensure safe operation.

The unauthorised conversion and/or modication of the device is not permitted for safety and approval reasons.

Consult a technician if you are not sure how to use or connect the device.

Measuring instruments and their accessories are not toys and must be kept out of the reach of children.

Always comply with the accident prevention regulations for electrical equipment when using the product in commercial facilities.

In schools, educational facilities, hobby and DIY workshops, the multimeter must be used under the responsible supervision of qualied personnel. The same applies when the multimeter is used by people with reduced physical and mental capabilities.

Before each measurement, always make sure that the meter is not set to a dif- ferent measurement function.

When using measuring probes without protective caps, measurements between the multimeter and the earth potential must not ex- ceed the CAT II measurement category.

When taking CAT III measurements, the cover caps must be placed on the probe tips (max. length of exposed contacts = 4 mm) to avoid accidental short circuits. These are supplied with the device.

The measuring probes must be removed from the measured object every time the measuring range is changed.58

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

Exercise particular caution when working with voltages higher than AC 30 Vr.m.s, 42.4 V peak or DC 60 V. Touching electrical conductors with these volt- ages may cause a fatal electric shock.

To prevent an electric shock, do not touch the connections/measuring points when taking measurements, either directly or indirectly. When taking measure- ments, do not touch any area beyond the grip markings on the test probes / test leads.

Check the multimeter and test leads for signs of damage before each measure- ment. Never take measurements if the protective insulation is damaged (torn, missing, etc.). The test leads come with a wear indicator. A second layer of insu- lation will become visible if the lead is damaged (the second layer of insulation is a different colour). If this occurs, discontinue use and replace the measurement accessory.

Do not use the multimeter just before, during or just after an electrical storm (electric shock /high-power surges!). Ensure that your hands, shoes, clothes, the oor, circuit and circuit components are dry.

Avoid using the device in the immediate vicinity of: – Strong magnetic or electromagnetic elds – Transmitting antennas or HF generators.

These may distort the measurements.

If you suspect that safe operation is no longer possible, discontinue use im- mediately and prevent unauthorized use. Safe operation can no longer be as- sumed if: – There are signs of damage – The device does not function properly – The device was stored under unfavourable conditions for a long period of time – The device was subjected to rough handling during transport

Do not switch the device on immediately after it has been brought from a cold room into a warm one. The condensation generated may destroy the product. Leave the device switched off and allow it to reach room temperature.59

Do not leave packaging material lying around carelessly, as it may become a dangerous toy for children.

Observe the safety information in each section.

Before each use verify tester operation by measuring a known voltage.

7.1 (Rechargeable) batteries

Correct polarity must be observed while inserting the (rechargeable) batteries.

The (rechargeable) batteries should be removed from the device if it is not used for a long period of time to avoid damage through leaking. Leaking or dam- aged (rechargeable) batteries might cause acid burns when in contact with skin, therefore use suitable protective gloves to handle corrupted (rechargeable) bat- teries.

(Rechargeable) batteries must be kept out of reach of children. Do not leave (rechargeable) batteries lying around, as there is risk, that children or pets swal- low them.

All (rechargeable) batteries should be replaced at the same time. Mixing old and new (rechargeable) batteries in the device can lead to (rechargeable) battery leakage and device damage.

(Rechargeable) batteries must not be dismantled, short-circuited or thrown into re. Never recharge nonrechargeable batteries. There is a risk of explosion!

7.2 Connected devices

Also observe the safety and operating instructions of any other devices which are connected to the product.

Attention, LED light:

Do not look directly into the LED light!

Do not look into the beam directly or with optical instruments!60 8 Product overview

A. Non-contact voltage sensor B. Tri-color indicator LED C. Display D. HOLD/REL button E. Rotary control for selecting the measurement mode F. mAµA measurement socket G. 10A max measurement socket H. LoZ Low impedance 400 kΩ button for changing the impedance

J. COM measurement socket (refer- ence potential, “negative”) K. measurement socket (“posi- tive potential” for direct voltages) L. LED light M. Connection thread for stand N. Battery compartment screw O. Battery compartment P. F2 fuse Q. F1 fuse61 9 Product description The multimeter (DMM) displays measurements on a digital display. The multimeter has 6000 counts (count = smallest display value). The true RMS value is used when measuring voltages and currents. The correct socket assignment is displayed ac- cording to the measurement mode selected. Incorrect socket assignment is indi- cated by a warning sound and warning indicator. This increases the operational safety of the multimeter for the user. The DMM can be used to take measurements up to CAT III 600 V. It is suitable for use in hobby and professional applications. Protective caps may be attached to the angled test lead plugs. Remove these before inserting the test leads into the multimeter. With this multimeter, it is no longer necessary to replace a fuse that has accidentally tripped in the mA/µA measurement range. The built-in PTC protection elements limit current ow in the event of an overload and thus protect the multimeter and the current circuit. The PTC protection elements reset themselves after tripping and a short cool-down period. For this, the current measurement circuit must only be interrupted briey. When the meter is being used for mA/µA measurement, but the meter is mistakenly connected to a high-energy high-voltage power supply, then the ceramic tube fuse will work and probably blow to protect the meter. In such case, the blown ceramic tube fuse is required to be replaced by a new one. The battery and fuse compartment can only be opened when all test leads have been removed from the multimeter. When the battery and fuse compartment are open, the test leads cannot be inserted into the measurement sockets. This is a built-in safety feature designed to protect the user.62 10 Control dial

Use the control dial to select the meas- urement mode.

Automatic range selection (“Au- torange”) is enabled and the range will be automatically selected. Æ The measurement ranges must be selected manually. Æ Always start with the largest meas- urement range, and then switch to a smaller range if necessary.

The control dial features a function button. Æ Use the SEL/ button to switch to sub-modes when the measuring mode has more than one function

To turn the multimeter off, move the control dial to the OFF position. Always turn the multimeter off when it is not in use.63 11 Display elements and symbols The following symbols and letters appear on the device/display. Other symbols may appear on the display (display test), but these have no function.

11.1 Display elements

Element Description TRMS True RMS measurement Delta symbol for relative measurement (= reference measure- ment)

Ohm (unit of electrical resistance)

Hertz (unit of frequency)

Milli symbol (exp. -3)

Volt (unit of electrical voltage)

Ampere (unit of electrical current) F Farad (unit of electrical capacity) °C Degrees Celsius (unit of temperature) °F Degrees Fahrenheit (American unit of temperature)

Display of the pulse duration of the positive half-wave as a per- centage (pulse-pause ratio) Automatic shut-off is enabled Diode test symbol64 Element Description Acoustic continuity tester symbol LoZ Low impedance symbol Correct socket assignment indicator Auto Automatic measurement range selection is enabled Battery replacement indicator Hold function is enabled

Direct current symbol ( ) Polarity indicator for current ow direction (negative terminal)

Alternating current symbol ( ) Warning symbol for dangerous voltage NCV Non-contact AC voltage measurement

Symbol Desription REL Relative measurement button (= reference measurement) SELECT Switch between sub-modes HOLD Freezes the current measurement OL Overload = The measurement range was exceeded LEAd “Incorrect socket” warning OFF Move to this position to turn the multimeter off TRMS True root mean square measurement LoZ Impedance switching in the V measurement range (10 MΩ to 400 kΩ) EF Display for NCV function without voltage detection65 Symbol Desription Diode test symbol Acoustic continuity tester symbol Capacity measurement range symbol Alternating current symbol Direct current symbol COM Connection for reference potential mV Millivolt mode (exp. -3) V Voltage mode (Volt = unit of electrical voltage) A Current mode (Ampere = unit of electric current) mA Milliamp mode (exp. -3) µA Microamp mode (exp. -6) Hz Frequency mode (Hertz = unit of frequency)

Measurement function for pulse duration as a percentage (pulse- pause ratio) Ω Resistance mode (Ohm = unit of electrical resistance) °C°F Measurement function for temperature measurement NCV Non-contact AC voltage detection66 12 Taking measurements Never exceed the maximum permitted input values. Never touch circuits or circuit components if they may carry voltages greater than AC 30 Vr.m.s, 42.4 V peak or DC 60 V! This may cause a fatal electric shock! Measurements can only be taken when the battery and fuse compartment is closed. Cables cannot be inserted when the compartment is open. Before measuring, check the connected test leads for damage, such as cuts, tears and kinks. Never use damaged test leads, as this may cause a fatal electric shock! When taking measurements, do not touch any area beyond the grip markings on the test probes / test leads. Only connect the two test leads that you require to take measurements. For safety reasons, remove all unnecessary test leads from the device before taking a measurement. Measurements in circuits rated at AC 30 Vr.m.s, 42.4 V peak or DC 60 V must only be made by qualied and trained personnel who are familiar with the relevant regulations and the associated hazards. “OL” (overload) indicates that the measuring range has been exceeded. The display shows the correct connection sequence of the measurement terminals for each measurement mode. Follow the sequence indicated on the display when connecting the test leads.67

12.1 Turning the multimeter on and off

1. Turn the rotary control to select the desired mode.

2. Turn the control dial to select the de-

sired mode. Æ The optical measuring range is automatically selected (except in current mode). Æ When measuring a current, al- ways start with the largest meas- urement range, and then switch to a smaller range if necessary. Æ Always disconnect the test leads from the multimeter before switching to another mode.

3. To turn the multimeter off, move the

control dial to the OFF position. Æ Always turn the multimeter off when it is not in use.

4. Before storing the multimeter, insert the test leads into the high-impedance ter-

minals (COM and ). This helps to prevent errors when making subse- quent measurements. The battery must be inserted before you can use the multimeter. See “Cleaning and maintenance” for instructions on how to change/replace the battery.68

Measurement socket monitoring is integrated into the DMM. If the test leads are connected to the wrong sockets (which can be dangerous for the user and dam- age the DMM), the DMM triggers an acoustic and optical alarm.

As soon as the test leads are inserted into the current measurement sockets and another measurement mode (excluding current measurement) is selected, the DMM emits a piercing warning sound. This is also the case if the measurement input between the 10A socket and mAµA socket is swapped.

If the alarm is triggered and “LEAd” appears on the display, check that the leads are connected to the correct sockets and that you have selected the correct measurement mode. The multimeter triggers the alarm when the terminals are connected as follows: Measurement mode V / mV / Ω / °C / °F / Hz% / / / , NCV mA/µA A Connected sockets mA/µA//10A 10A mA/µA Interrupt the test setup immediately in the event of an alarm and check that the correct measurement mode/measurement connection has been selected. The display also indicates the correct measurement sockets to use for each measurement range.69

12.3 DC/AC voltage Measurement

1. Set the function dial to the required setting.

2. “DC” will show on the display.

Æ Short press the SEL/ button to switch to AC, “AC” will show on the dis- play. Æ For lower voltages up to max. 600 mV, select the mV measuring range.

3. Connect the test leads to the

terminals: Æ Red test lead to the terminal. Æ Black test lead to the COM terminal.

4. Connect the two measuring probes in parallel to the object that you want to

measure (e.g. generator or circuit). Æ The measured value will appear on the display.

5. After taking a measurement, remove the leads from the measured object and

switch off the DMM. The “V/AC” range has an input resistance of ≥10 MΩ. This means that there is almost no load on the circuit. DC voltage measurements (V ): If a minus “-” sign appears in front of the value, the measured voltage is negative (or the measuring lines are swapped). The “V DC/AC” voltage range has an input resistance of >10 MOhm; the “mV DC” range has an input resistance of >100 MOhm.70

12.4 LoZ voltage mode

LoZ mode allows you to measure DC and AC voltages with a low impedance (ap- prox. 400 kΩ). In this mode, the multimeter lowers the internal resistance to prevent phantom voltage readings. As a result, the circuit is more heavily loaded than in the standard measuring mode.

1. In order to use LoZ measurement mode, press the LoZ Low imp.400 kΩ button

during voltage measurement. The measured impedance is reduced for as long as the button is pressed.

2. “LoZ” will appear on the display.

LoZ measurement mode may only be used up to a maximum voltage of 250 V. The duration of the LoZ measurement must be limited to a maxi- mum of 3 s. This mode is not available in the mV measurement range. After using LoZ mode, leave the multimeter for 1 minute before using it again.71

12.5 Measuring current (A)

Never exceed the maximum permitted input values. Do not touch any circuits or circuit components if the circuit has voltages higher than AC 30 Vr.m.s, 42.4 V peak or DC 60 V. Danger of death! The voltage in the measured circuit must not exceed 600 V. Measurements greater than 6 A must only be made for a maximum of 30 seconds in 15-minute intervals. Always start the current measurement with the largest measurement range and switch to a smaller range if necessary. Before connecting the multimeter and before changing the measurement range, always de-energise the circuit. All current measurement ranges are provided with fuses and thus protected against overload. Do not measure any currents above 10 A in the 10A range and no currents above 600 mA in the mA/µA range, otherwise the fuses trigger. Perform the current measurement in the mAµA measurement range as quickly as possible. Continuous measurements are to be avoided. The PTC technology heats the protective components in the measurement circuit with increasing current strength or measurement duration. Conse- quently, the internal resistance increases and the current ow is limited. Please take this into account when performing a series of measurements. An optical and acoustic alarm is triggered when the measurement range is exceeded. When the meter is being used for mA/µA measurement, but the meter is mistakenly connected to a high-energy high-voltage power supply, then the ceramic tube fuse will work and probably blow to protect the meter. In such case, the blown ceramic tube fuse is required to be replaced by a new one. If the PTC fuse has been triggered (steadily declining measurement in- dicator, “OL” or alarm), stop the measurement and switch the DMM off (OFF). Wait for approx. 5 minutes. The self-resetting fuse cools down and then functions again.72

12.5.1 Follow the steps below to measure DC currents (A )

1. Switch on the DMM and select “10A, mA, or µA” mode.

2. Press SEL/ to switch to DC mode. “DC” will appear on the display.

3. Press the SEL/ button again to switch back to AC mode.

4. Select the desired measurement range and connect the corresponding termi-

nals. Measurement mode Measurement range Terminals µA 0 - 6000 µA COM + mAµA mA 6000 µA - 600 mA COM + mAµA 10A 600 mA - 10 A COM + 10A

5. Insert the red test lead into the mAµA or 10A max measurement socket.

6. Insert the black test lead into the COM measurement socket.

7. Connect the two measuring probes (de-energised) in series to the object that

you want to measure (e.g. battery or circuit). The electrical circuit must be dis- connected before you connect the probes.

8. Reconnect the circuit. The measurement will appear on the display.

9. After measuring, disconnect the circuit and remove the test leads from the

measured object. Switch the DMM off.73

12.5.2 Follow the steps below to measure AC currents (A )

1. Switch on the DMM and select “10A, mA, or µA” mode.

2. Press SEL/ to switch to AC mode. “AC” will appear on the display.

3. Press the SEL/ button again to switch back to DC mode.

4. Select the desired measurement range and connect the corresponding termi-

5. Insert the red test lead into the mAµA or 10A max measurement socket. Insert

the black test lead into the COM measurement socket.

6. Connect the two measuring probes (de-energised) in series to the object that

you want to measure (e.g. generator or circuit). The electrical circuit must be disconnected before you connect the probes.

7. Reconnect the circuit. The measurement will appear on the display.

8. After measuring, disconnect the circuit and remove the test leads from the

measured object. Switch the DMM off.74

12.6 Measuring frequency

The DMM can be used to measure the frequency of a signal voltage (supports fre- quencies from 10 Hz to 10 MHz). The maximum input is 20 Vrms. This mode is not suitable for taking measurements on mains voltages. Observe the input specica- tions in the technical data. Proceed as follows to take a frequency measurement:

1. Switch the DMM on and select Hz mode. “Hz” will appear on the display.

2. Insert the red test lead into the Hz

measurement socket and the black test lead into the COM measurement socket).

3. Connect the two measuring probes to

the object that you want to measure (e.g. signal generator or circuit). Æ The frequency and correspond- ing unit will be displayed.

4. After taking a measurement, remove

the leads from the measured object and switch the DMM off.75

12.7 Measurement of pulse duration in %

The DMM can be used the ratio of the pulse duration of an alternating voltage sig- nal’s positive half wave as a percentage of the entire period. The maximum input is 20 Vrms. This mode is not suitable for taking measurements on mains voltages. Observe the input specications in the technical data. Proceed as follows to take a frequency measurement:

1. Switch the DMM on and select the Hz measurement range. “Hz” will appear on

rotary control. “%” will appear on the display.

3. Insert the red test lead into the Hz

measurement socket and the black test lead into the COM measurement socket.

4. Connect the two measuring probes to

the object that you want to measure (e.g. signal generator or circuit). Æ The pulse duration of the positive half wave is shown as a percent- age value on the display.

5. After taking a measurement, remove the leads from the measured object and

switch the DMM off.76

12.8 Measuring resistance

Make sure that all objects that you wish to measure (including circuit components, circuits and component parts) are disconnected and dis- charged. Follow the steps below to measure the re- sistance:

1. Switch the DMM on and select the Ω

2. Insert the red test lead into the Ω meas-

urement socket and the black test lead into the COM measurement socket.

3. Check the test leads for continuity by

connecting both measuring probes to one another. The multimeter should then show a resistance value of approx

0 - 0.5 Ω (inherent resistance of the test

leads). Æ For low-impedance measurements of <600 Ω, hold down the REL button for approximately one second when the measuring probes are short circuited. This ensures that the inherent resistance of the test leads does not affect the resistance measurement. The display should show “0 Ω”. Auto range is thereby disabled.

4. Connect the measuring probes to the object that you want to measure. The

measurement will be shown on the display (provided that the object you are measuring is not highly resistive or disconnected). Wait until the display stabi- lises. This may take a few seconds for resistances greater than 1 MΩ. Æ “OL” (overload) indicates that the measurement range has been exceeded or that the circuit is broken.

5. After taking a measurement, remove the leads from the measured object and

switch the DMM off. When taking a resistance measurement, ensure that the points that come into contact with the measuring probes are free from dirt, oil, solder and other impurities. These substances may distort the measurement. The REL button only works when a measurement is displayed. It cannot be used when “OL” is displayed. R77

Make sure that all objects that you wish to measure (including circuit components, circuits and component parts) are disconnected and dis- charged.

1. Switch the DMM on and select the

2. Press SEL/ twice to switch to di-

ode test mode. The diode symbol and “V” will appear on the display. Press the button again to switch to the next mode.

3. Insert the red test lead into the

measurement socket and the black test lead into the COM measurement socket).

4. Check the test leads for continuity by

connecting both measuring probes to one another. A value of approx. 0.000 V should be shown.

5. Now connect the two measuring probes to the object to be measured (diode).

The red test lead to the anode (+), the black test lead to the cathode (-). Æ The normal PN junction forward voltage will be shown in volts (V). “OL” indicates that the diode is reverse-biased or defective. Try taking the meas- urement again with the opposite polarity.

6. After taking a measurement, remove the leads from the measured object and

switch the DMM off.78

12.10 Continuity test

Make sure that all objects that you wish to measure (including circuit components, circuits and component parts) are disconnected and dis- charged.

1. Switch the DMM on and select the

2. Press the SEL/ button once to

switch to the mode. The continuity test symbol and the “Ω” symbol will appear on the display. Press the but- ton again to switch to the next mode.

3. Insert the red test lead into the

measurement socket and the black test lead into the COM measurement socket. Æ If the measured resistance is equal to or less than 10 Ω, the multimeter will beep to indicate continuity. There is no further beeping from >100 Ω. The continuity test measures resistances of up to 600 Ω. Æ “OL” (overload) indicates that the measurement range has been exceeded or that the circuit is broken.

4. After taking a measurement, remove the leads from the measured object and

switch the DMM off.79

12.11 Measuring capacitance

Ensure that all objects that you want to measure (including circuit compo- nents, circuits and component parts) are disconnected and discharged. Always pay attention to the polarity when using electrolytic capacitors.

1. Switch the DMM on and select the mode

2. Press the SEL/ ” button three times to switch mode. The unit “nF” will ap-

pear on the display for capacitance measurement. Press the button again to switch to the next mode.

3. Insert the red lead into the V socket and the black lead into the COM socket.

Due to the sensitive measur- ing input, the display may show a reading even with “open” test leads. Press the “REL” button to measure small capacities (<600 nF). The in- dicator is then set to “0”. Auto range is thereby disabled.

4. Connect the two measuring probes

(red = positive, black = negative) to the object that you want to measure (capacitor). The capacitance will be shown on the display after a few sec- onds. Wait until the display stabilises. This may take a few seconds for capaci- tances greater than 60 µF. Æ “OL” (overload) indicates that the measuring range has been exceeded.

5. After taking a measurement, remove the leads from the measured object and

switch the DMM off.80

12.12 Measuring the temperature

When taking a temperature measurement, only allow the temperature probe to come into contact with the surface of the measured object. The multimeter must not be exposed to temperatures below or in excess of the operating temperature, as this may lead to incorrect measurements. The temperature probe must only be used on voltage-free surfaces. The multimeter features a wire sensor that can measure temperatures from -40 to +230 °C. To use the full temperature range (-40 bis +1000 °C), purchase a Type- K thermal sensor. An adapter plug is required to connect Type-K sensors with a miniature connector. All K-type thermal sensors can be used for taking temperature measurements. The tem- perature can be displayed in °C or °F. Proceed as follows to measure the tempera- ture:

1. Switch the DMM on and select the “°C”

with the correct polarity (with the positive terminal in the V measurement socket and the negative terminal in the COM meas- urement socket). Æ The temperature in °C will appear on the display.

3. The unit can be changed from Celsius (°C) to Fahrenheit (°F) using the SEL/

button. The unit is changed every time the button is pressed. Æ “OL” on the display indicates that the measurement range was exceeded or the sensor was disconnected.

4. After taking a measurement, remove the sensor and turn off the multimeter.

If no temperature sensor is connected, the ambient temperature of the DMM can be displayed using a jumper between the two measurement sockets (“COM” and “°C”). As the sensor is located inside the housing, you, the display reacts very slowly to temperature uctuations. This func- tion helps you check that the DMM is at the correct operating temperature81 after storage. An external sensor must be used for quick measurements.

12.13 Non-contact AC voltage test “NCV”

Make sure that all measuring sockets are unoccupied. Please remove all measuring leads and adapters from the measuring device. This function only serves as an aid. Prior to performing work on these cables, you must perform contact measuring op- erations to check for the absence of voltage. Test this function beforehand on a known AC voltage source.

1. Set the function dial to NCV, “EF” and “NCV” will show

2. Guide the non-contact voltage sensor area to the test

location (max. 5 mm). For twisted cables, it is recom- mended to touch the cable with the end of non-contact voltage sensor. Æ If AC power is sensed, the tri-color indicator LED will light up and the buzzer will sound. Æ The higher the voltage, the higher the frequency at which the buzzer will beep. Æ The tri-color indicator LED will change from green to yellow to red as the voltage increases.

3. When nished measuring, switch the power OFF.82

Some measurement modes have additional sub-modes. The sub-functions are in the rotation area marked grey. To switch to a sub-mode, press the SEL/ button briey (<2 s). Press the SEL/ button again to switch to the next sub-mode.

The REL function allows you to take a reference measurement to avoid possible line losses (e.g. during resistance measurements). For this purpose, the current indicated value is set to zero. A new reference value is set.

1. To enable this function, press and hold the REL button for approx. 2 s. The

display shows “Δ” and the measurement indicator is set to zero. The automatic measurement range selection thereby disabled.

2. To disable this function, change the measurement mode or press and hold the

REL button for approx. 2 s. The REL function is not enabled in the following measurement modes: Frequency, pulse duration, diode test and continuity test. The REL button only works when a measurement is displayed. It cannot be used when “OL” is displayed.83

This feature freezes the current reading on the display so that you can record it for future reference. If you test live wires, ensure that this function is disabled before the measurement starts. Otherwise, a false measuring result is simulated!

1. Press the HOLD button to enable this function, “H” will be displayed.

2. To disable the hold feature, press the HOLD button or change the measurement

The DMM switches off automatically after 15 minutes if no buttons are pressed. This function saves battery power and extends the service life. The symbol will be displayed when the automatic shut-off feature is enabled.

The DMM will beep several times for approximately 1 minute before it turns off. If the REL/HOLD or SEL/ button is pressed during this time to cancel shut- off, the next shut-off signal is sounded after a further 15 minutes. You will hear a long beep when the multimeter switches off.

To switch the DMM back on, move the rotary control to the “OFF” position or press the “REL/HOLD” or SEL/ button.

The automatic shut-off feature can be disabled manually. Follow the steps below to disable the automatic power-off feature:

1. Switch the multimeter off (OFF).

2. Hold down the SEL/ button and switch the DMM on using the rotary control.

Æ The “ ” symbol will no longer be visible on the display. Æ The automatic shut-off feature will remain disabled until the multimeter is switched off using the rotary control.84 14 Cleaning and maintenance

The multimeter should be calibrated once a year to ensure that measurements remain accurate.

The multimeter does not need to be serviced (apart from occasional cleaning and battery/fuse replacements).

Refer to the following sections for instructions on how to change the fuse and battery. Regularly check the device and test leads for signs of damage.

Always observe the following safety instructions before cleaning the device: Opening covers on the product or removing parts that cannot be removed by hand may expose voltage-carrying components. Before cleaning or servicing the multimeter, disconnect all cables from the multimeter and measured objects, and then switch the multimeter off.

Do not use abrasive detergents, petrol, alcohol or other similar chemicals to clean the device. These may corrode the surface of the multimeter. In addition, the vapours emitted by these substances are explosive and harmful to your health. Do not use sharp-edged tools, screwdrivers or metal brushes to clean the device.

Use a clean, damp, lint-free and antistatic cloth to clean the multimeter, display and test leads. Allow the multimeter to dry out completely before using it again.85

14.3 Opening the battery/fuse compartment

The battery/fuse compartment cannot be opened when the leads are connected to the terminals.

All terminals are automatically locked when the battery/ fuse compartment is opened to prevent leads from being inserted. Follow the steps below to open the battery/fuse compartment:

1. Disconnect all test leads from the multimeter and switch

2. Loosen and remove the battery compartment screw on the

back of the multimeter.

3. Collapse the fold-out stand and slide the battery/fuse com-

partment cover off the bottom of the multimeter. Æ You should now be able to access the fuses and the battery.

4. Repeat the above steps in the reverse order to replace the battery/fuse compart-

ment cover, and then screw it in place. Æ The multimeter is now ready to use.86

14.4 Inserting/changing the battery

1. Disconnect the multimeter and test leads from all circuits, and then disconnect

all test leads from the multimeter.

2. Switch off the multimeter.

3. Remove the battery/fuse compartment cover (see “Opening the battery/fuse

4. Insert new batteries with the same specications.

Æ Pay attention to the polarity markings in the battery compartment.

5. Carefully replace the battery/fuse compartment cover.

Never use the multimeter when the battery/fuse compartment is open. !RISK OF FATAL INJURY! Do not leave empty batteries in the device. Even leakproof batteries may corrode and destroy the device or release chemicals that are detrimental to your health. Do not leave batteries unattended, as they may be swallowed by children or pets. Seek immediate medical attention if a battery is swallowed. If you do not plan to use the multimeter for an extended period, remove the battery to prevent it from leaking. Leaking or damaged batteries may cause acid burns if they come into contact with your skin. Always use protective gloves when handling leaking or damaged batteries. Batteries must not be short-circuited or thrown into open ames! Do not recharge or disassemble non-rechargeable batteries, as this may cause an explosion.87

14.5 Replacing the 10 A input fuse

The 10 A current measuring input is equipped with a ceramic high-performance fuse. If you cannot take measurements in this range, you will need to replace the fuse. Follow the steps below to replace the fuse:

1. Disconnect the connected test leads from the measuring circuit and from your

DMM. Switch the DMM off.

2. Remove the battery/fuse compartment cover (see “Opening the battery/fuse

3. Replace the defective fuse with a new fuse of the same type and nominal volt-

age. Æ F1 fuse: Φ6.35×32 mm, FF 10 A, H 600 V, breaking capacity: 10 kA

4. Carefully replace the battery/fuse compartment cover.

Using patched fuses or bridging the fuse holder is not permitted for safety reasons. This may cause a re or explosion. Never use the multimeter when the battery/fuse compartment is open. The mA/µA input is equipped with a maintenance-free resettable PTC fuse. You do not need to replace the fuse in this input. When the meter is being used for mA/µA measurement, but the meter is mistakenly connected to a high-energy high-voltage power supply, then the ceramic tube fuse will work and probably blow to protect the meter. In such case, the blown ceramic tube fuse is required to be replaced by a new one.88 15 Disposal

This symbol must appear on any electrical and electronic equipment placed on the EU market. This symbol indicates that this device should not be disposed of as unsorted municipal waste at the end of its service life. Owners of WEEE (Waste from Electrical and Electronic Equipment) shall dispose of it separately from unsorted municipal waste. Spent batter- ies and accumulators, which are not enclosed by the WEEE, as well as lamps that can be removed from the WEEE in a non-destructive manner, must be removed by end users from the WEEE in a non-destructive man- ner before it is handed over to a collection point. Distributors of electrical and electronic equipment are legally obliged to provide free take-back of waste. Conrad provides the following return options free of charge (more details on our website):

at the Conrad collection points

at the collection points of public waste management authorities or the collection points set up by manufacturers or distributors within the meaning of the ElektroG End users are responsible for deleting personal data from the WEEE to be disposed of. It should be noted that different obligations about the return or recycling of WEEE may apply in countries outside of Germany.89

15.2 (Rechargeable) batteries

Remove batteries/rechargeable batteries, if any, and dispose of them separately from the product. According to the Battery Directive, end users are legally obliged to return all spent batteries/rechargeable batteries; they must not be disposed of in the normal household waste. Batteries/rechargeable batteries containing hazardous substances are labelled with this symbol to indicate that disposal in household waste is forbidden. The abbreviations for heavy metals in batteries are: Cd = Cad- mium, Hg = Mercury, Pb = Lead (name on (rechargeable) batteries, e.g. below the trash icon on the left). Used (rechargeable) batteries can be returned to collection points in your munici- pality, our stores or wherever (rechargeable) batteries are sold. You thus full your statutory obligations and contribute to environmental protection. Batteries/rechargeable batteries that are disposed of should be protected against short circuit and their exposed terminals should be covered completely with insulat- ing tape before disposal. Even empty batteries/rechargeable batteries can contain residual energy that may cause them to swell, burst, catch re or explode in the event of a short circuit.90 16 Troubleshooting The multimeter was designed using the latest technology and is safe to use. How- ever, problems and malfunctions may still occur. This section tells you how to troubleshoot possible faults: Always observe the safety information in these instructions. Problem Possible cause Suggested solution The multimeter does not work. Is the battery at? Check the battery level and replace if necessary. The measured value does not change. Have you selected the wrong measurement mode (AC/DC)? Check the display (AC/ DC) and select another mode if necessary. Did you use the wrong measurement sockets? Check that the test leads are connected to the cor- rect terminals. Is the hold function ena- bled? Disable the hold function. The multimeter cannot take measurements in the 10 A range. Is the fuse in the 10 A input defective? Check the 10A F1 fuse. The multimeter cannot take measurements in the mA/µA range. The PTC fuse was trig- gered, which limits the measurement current. Reduce the measuring current or switch to the 10 A measuring range. Erratic measurement display in the mA/µA range. The F2 fuse has blown. Replace the blown F2 fuse Any repair work other than that described above must be carried out by an authorized technician. If you have questions about the multimeter, please contact our technical support team.91 17 Technical data Display ...........................................................6000 counts (digits) Measuring rate ...............................................approx. 2 - 3 measurements/second AC measurement method ..............................True RMS, AC-coupled Test lead length .............................................approx. 90 cm Measuring impedance ................................... ≥10MΩ (mV: ≥100MΩ) Measurement socket clearance .....................19 mm (COM-V) Low battery indicator .....................................Battery voltage <3.6 ±0.2 V “Dangerous voltage” indicator .......................≥30 V/AC-DC “Range exceeded” alarm ............................... ≥600 V/AC-DC, >10 A/AC-DC “OL” (overload) alarm .................................... ≥610 V/AC-DC, ≥10 A/AC-DC or measurement >6000 counts Automatic shut-off .......................................... after approx.15 minutes (can be manually disabled) Current consumption (auto off) ......................<50 µA Operating voltage .......................................... 3x AAA 1.5 V batteries Operating conditions ......................................0 to +40 °C (<75% RH) Operating altitude .......................................... max. 2000 m above sea level Storage temperature ......................................-10 °C to +50 °C Weight ...........................................................approx. 375 g Dimensions (L x W x H) ................................. 190 x 90 x 43 mm Measuring category ....................................... CAT III 600 V Pollution degree .............................................2 Operating environment .................................. Indoor use Safety regulations .........................................EN 61010-1 and EN61010-2-033 F1 FUSE ........................................................ Φ6.35×32 mm, FF 10 A, H 600 V, breaking capacity: 10 kA F2 FUSE ........................................................ Φ5×20 mm, FF 2.5 A, H 700V, break- ing capacity: min 300 A92 Measuring tolerances Accuracy in ± (% of reading + display error in counts (= number of smallest points)). The accuracy is valid for one year at a temperature of +23 °C ± 5 °C, and at a relative humidity of less than 75%, non-condensing. Temperature coefcient: +0.1 x (specied accuracy)/1 °C outside the specied temperature range. The accuracy of measurements may be affected when the multimeter is used in a high-frequency electromagnetic eld.

Direct voltage (V/DC) Range Resolution Accuracy

*Only available in “mV” mode Specied measurement range: 5 - 100% of the measurement range 600 V overload protection; Impedance: 10 MΩ (mV: ≥100 MΩ) The multimeter may display ≤5 counts if a measurement input is short-circuited.

Direct voltage (V/DC) LoZ Range Resolution Accuracy

Specied measurement range: 5 - 100% of the measurement range 600 V overload protection; Impedance: 400 kΩ (*max. 250 V, 3s) The multimeter may display ≤5 counts if a measurement input is short-circuited. After using the LoZ feature, leave the multimeter for 1 minute before using it again.

Alternating voltage (V/AC) Range Resolution Accuracy

Alternating voltage (V/AC) LoZ Range Resolution Accuracy

Specied measurement range: 5 - 100% of the measurement range Frequency range: 45 - 400 Hz; Overload protection: 600 V; Impedance: 400 kΩ (*max. 250 V, 3s) The multimeter may display 5 counts if a measurement input is short-circuited After using the LoZ feature, leave the multimeter for 1 minute before using it again TrueRMS peak (Crest Factor (CF)) ≤3 CF to 600 V TrueRMS peak for non-sinusoidal signals plus tolerance: CF >1.0 - 2.0 + 3%, CF >2.0 - 2.5 + 5% CF >2.5 - 3.0 + 7%

Direct current (A/DC) Range Resolution Accuracy

Overload protection: 600 V Fuses: µA/mA = 2x 0.55 A/240 V resettable, 1x F2 2.5 A/700 V ceramic, internal resistance approx. <10 Ω 10 A = High-performance FF 10 A/600 V ceramic fuse ≤ 6 A = continuous measurement, >6 A = max. 30 s at intervals of 15 minutes The multimeter may display 3 counts when a measurement input is open.

Alternating current (A/AC) Range Resolution Accuracy

±(1.3% + 4) 6000 µA 1 µA 60.00mA 0.01mA 600.0mA 0.1mA 6.000A 0.001A ±(1.5% + 4) 10.00A 0.01A ±(1.8% + 7) Specied measurement range: 5 - 100% of the measurement range Overload protection 600 V; frequency range 45 - 400 Hz Fuses: µA/mA = 2x 0.55 A/240 V resettable, 1x F2 2.5 A/700 V ceramic, internal resistance approx. <10 Ω 10 A = High-performance FF 10 A/600 V ceramic fuse ≤ 6 A = continuous measurement, >6A = max. 30 s at intervals of 15 minutes The multimeter may display 3 counts when a measurement input is open. TrueRMS peak (Crest Factor (CF)) ≤3 CF over the entire range TrueRMS peak for non-sinusoidal signals plus tolerance: CF >1.0 - 2.0 + 3% CF >2.0 - 2.5 + 5% CF >2.5 - 3.0 + 7%96

Resistance Range Resolution Accuracy

600 V overload protection Measurement voltage: Approx. 1.0 V, measurement current approx. 0.7 mA *Accuracy for measurement range ≤600 Ω was calculated after deducting lead resistance from the REL function

Capacitance Range Resolution Accuracy

6.000 nF* 0.001 nF ±(4.4% + 9)

60.00 nF* 0.01 nF ±(3.2% + 9)

60.00 mF 0.01 mF ±(7.0% + 5)

600 V overload protection *Accuracy for measurement range ≤600 nF only applies when the REL function is used97

Frequency “Hz” (electronic) Range Resolution Accuracy ≤9.999 Hz* 0.001 Hz Not specied

10.00 kHz - 99.99 kHz 0.01 kHz

>10.00 MHz* 0.01 MHz Not specied *The specied frequency range is 10.00 Hz - 10 MHz Signal level (without direct voltage component): ≤100 kHz: 200 mVrms - 20 Vrms >100 kHz to 1 MHz: 600 mVrms - 20 Vrms >1 MHz to 5 MHz: 500 mVrms - 20 Vrms >5 MHz to 10 MHz: 900 mVrms - 20 Vrms 600 V overload protection

Pulse width / pulse ratio (duty cycle) Range Resolution Accuracy 0.1% - 99.9% 0.1% ±2.3% Overload protection: 600 V Signal level (without direct voltage component): ≤100 kHz: 1 mVrms - 20 Vrms Frequency range pulse width: ≤100 kHz

Temperature Range Resolution Accuracy -40 to +40 °C 1 °C ±(1.4% +5) +40 to +1000 °C ±(1.4% + 4) -40 to +104 °F 1 °F ±(1.4% + 9) +104 to +1832 °F ±(1.4% + 7) Overload protection: 600 V, Sensor input: Type K