VOLTCRAFT VC-331 Mini Clamp Meter Instruction Manual

VOLTCRAFT VC-331 Mini Clamp Meter

Product Information

The VC331 200A AC/DC Mini Clamp Meter is a versatile tool for measuring both AC and DC currents up to 200A. It features a compact design for easy handling and portability.

Specifications:

• Model: VC331
• Clamp Meter Type: Mini
• Maximum Current: 200A
• AC/DC: Yes

Product Usage Instructions

Delivery Contents:
The package should include the following items:

• Clamp Meter
• HOLD / – Button
• Selector Switch
• SELECT Button
• Display Screen
• Work Light

Replacing Batteries:

To replace the batteries:

1. Ensure the product is turned off.
2. Use a cross-head screwdriver to remove the battery compartment cover screw.
3. Replace the old batteries with new ones, ensuring correct polarity.
4. Reattach the battery compartment cover, taking care not to overtighten the screw.

Operation:

Important Safety Instructions:
Always refer to the safety guidelines provided in the manual before use.

• Selector Switch:
  Before each use, set the selector switch to the appropriate range or function.

• Power On/Off:
  The product is off when the function switch (selector switch) is in the OFF position. Remember to turn it off after use.

• Auto Power Off:
  The device has an automatic power-off feature which can be disabled or enabled. If left inactive, the device will turn off automatically. Turning off the device reactivates this feature.

• Display Hold Function:
  To freeze the display reading, use the hold function. Press the HOLD button to activate this feature.

• Maximum/Minimum Value Display:
  In this mode, the display shows either the minimum (MIN) or maximum (MAX) measured value.

Frequently Asked Questions (FAQ):

• Q: How do I clean the clamp meter?
  A: Use a soft, dry cloth to clean the exterior of the meter. Do not expose it to moisture or corrosive chemicals.

• Q: What should I do if the display shows incorrect readings?
  A: Check the battery status and replace them if necessary. Ensure correct alignment of the measured conductor with the markings on the meter.

Introduction

Dear customer,

• Thank you for purchasing this product.
• If there are any technical questions, please contact: www.conrad.com/contact

Intended use

• The product is a clamp meter and can be used to measure and display various electrical parameters.
• The product is by the safety requirements for Electronic Measuring Equipment, EN 61010-1 and EN 61010-2-032.
• The product conforms to CAT II 600 V and CAT III 300 V:
  • MEASUREMENT CATEGORY II applies to testing and measuring circuits connected directly to utilization points (socket outlets and similar points) of the low-voltage MAINS installation.
  • MEASUREMENT CATEGORY III is applicable to test and measure circuits connected to the distribution part of the building’s low-voltage MAINS installa-tion.
• The product is designed for private and commercial use.
• In commercial institutions, the accident prevention regulations of the Employer’s Liability Insurance Association for Electrical Systems and Operating Materials are to be observed.
• The product can be used in schools and training centres. The use must be supervised by trained personnel.
• The product is intended for indoor use only. Do not use it outdoors.
• Contact with moisture must be avoided under all circumstances.
• If you use the product for purposes other than those described, the product may be damaged.
• Improper use can result in short circuits, fires, electric shocks or other hazards.
• The product complies with the statutory national and European requirements. For safety and approval purposes, you must not rebuild and/or modify the product.
• Read the operating instructions carefully and store them in a safe place. Make this product available to third parties only together with the operating instructions.
• All company names and product names are trademarks of their respective owners. All rights reserved.

Delivery contents

• Product
• 2 x 1.5 V AAA batteries
• Test leads with removable probe tip covers
• Thermocouple
• Storage bag
• Operating instructions

Operating Instructions for download

Use the link www.conrad.com/downloads (alternatively scan the QR code) to download the complete operating instructions (or new/current versions if available). Follow the instructions on the web page.

Description of symbols

• This product conforms to the required CE standards and complies with applicable European (EU) directives.
• This product is UK conformity assessed and meets applicable Great Britain directives.
• 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.
• Protection class 2 (double or reinforced insulation, protective insulation).
• Application around and removal from HAZARDOUS LIVE conductors are permitted. Personal protective equipment must be used.
• Can test and measure circuits connected directly to utilization points (e.g., socket outlets) of the low-voltage MAINS installation.
• Can test and measure circuits connected to the distribution part of the building’s low-voltage MAINS installation.
• Alternating current (AC)
• Direct current (DC)
• Earth ground
• Jaw alignment marks. To meet accuracy specifications the conductor must be aligned with these marks.
• Polarity markings for direct current (DC) measurement. The symbols indicate the direction of the current for taking measurements.

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, we assume no liability for any resulting personal injury or damage to property. Such cases will invalidate the warranty/guarantee.

General

• The product is not a toy. Keep it out of the reach of children and pets.
• Do not leave packaging material lying around carelessly. This may become dangerous playing material for children.
• If you have questions that remain unanswered by this information product, contact our technical support service or other technical personnel.
• Maintenance, modifications and repairs must only be completed by a technician or an authorised repair centre.

Handling
Handle the product carefully. Jolts, impacts or a fall even from a low height can damage the product.

Operating environment

• Do not place the product under any mechanical stress.
• Protect the appliance from extreme temperatures, strong jolts, flammable gases, steam and solvents.
• Protect the product from high humidity and moisture.
• Protect the product from direct sunlight.
• Do not switch the product on after it has been taken from a cold to a warm environment. The condensation that forms might destroy the product. Allow the product to reach room temperature before you use it.
• Never operate the product in direct proximity of strong magnetic or electromag-netic fields or transmitter aerials or HF generators. Doing so can prevent the product from functioning properly.

Operation

• Consult an expert when in doubt about the operation, safety or connection of the product.
• If it is no longer possible to operate the product safely, take it out of operation and protect it from any accidental use. DO NOT attempt to repair the product yourself. The safe operation can no longer be guaranteed if the product:
  • is visibly damaged,
  • is no longer working properly,
  • has been stored for extended periods in poor ambient conditions or
  • has been subjected to serious transport-related stresses.

Batteries

• Correct polarity must be observed while inserting batteries.
• The batteries should be removed from the device if it is not used for a long period to avoid damage through leaking. Leaking or damaged batteries might cause acid burns when in contact with skin, therefore use suitable protective gloves to handle corrupted batteries.
• Batteries must be kept out of reach of children. Do not leave batteries lying around, as there is a risk, that children or pets swallow them.
• All batteries should be replaced at the same time. Mixing old and new batteries in the device can lead to battery leakage and device damage.
• Batteries must not be dismantled, short-circuited or thrown into fire. Never recharge non-rechargeable batteries. There is a risk of explosion!

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

Product

• Before use, always verify measurements against a known voltage source to ensure safe operation. If abnormal or erratic operation is detected:
  • Stop using immediately
  • and have the product inspected by a qualified technician
• When taking measurements make sure no objects are trapped between the clamp jaws (e.g., cables).
• Do not exceed the maximum permissible measurement values.
• Risk of fatal electric shock! The product must never be used if the housing or battery compartment cover is open.
• Risk of electric shock! Use caution when working with voltages above 30 V/AC rms (42.4 V peak), 60 V/DC.
• The rotary switch should be set to the correct range/function before each use.
• Inspect the product for damage before each measurement. Never take measurements if the insulation or product is damaged.
• Use extreme caution when working around bare conductors or bus bars as contact can result in electric shock.

Test leads and probes

• The voltage between the connection points of the meter and the earth potential must not exceed 300 V AC/DC in CAT III.
• Probe assemblies to be used for MAINS measurements should meet EN 61010-031 standard, rated CAT III 300 V, 10 A or better.
• Risk of electric shock! Use caution when working with voltages above 30 V/AC rms (42.4 V peak), 60 V/DC.
• Test leads must be disconnected before changing the range/function.
• The cables have a wear indicator. If damaged, a second insulation layer in a different colour becomes visible. Do not use it if this occurs, replace it immediately!
• When taking measurements do not grip beyond the finger barrier or grip range markings on the probes.
• When taking CAT III measurements, probes with cover caps (max. 4 mm free contact length) must be used to avoid accidental short circuits.
• When using the probes without cover caps, measurements between the meter and the earth potential must not be performed above the measuring category CAT II.
• Prevent short circuits by ensuring test points/connections do not touch when taking measurements.
• Always check the probes and leads for any sign of damage before each use. Do not use if damaged, replace immediately!

Thermocouple

• Risk of electric shock! Prevent the temperature probe from coming into contact with voltage and current-carrying components.
• Do not exceed the rated maximum temperature of the thermocouple. See section: Technical data.
• Keep dry. Moisture can result in corrosion and cause measurement errors or thermocouple failure.
• Do not bend or crimp the junction or exexposet to corrosive chemicals.

Overview

Product

1. Current sensing clamp
2. HOLD/ button
3. Rotary switch
4. SELECT button
5. Display
6. Work light
7. Non-contact voltage (AC) detector tip
8. Non-contact voltage (AC) tri-colour LED
9. Clamp lever
10. REL/ZERO, MAX/MIN button
11. Battery compartment
12. COM terminal
13. terminal

Display symbols

Replacing Batteries

Important:
Low battery voltage can affect the accuracy of readings resulting in electric shock and/or injury:

• Replace the batteries when the low battery indicator shows.
• Rechargeable batteries are not recommended as they typically have a lower voltage per cell.

Risk of electric shock!
Disconnect the product from any input signals before replacing the batteries.

Preconditions:
The power is switched OFF.

1. Use a cross-head screwdriver to remove the compartment cover screw.
2. Replace the batteries and match the polarity markings shown inside the compartment.
3. Replace the battery compartment cover taking care not to over-tighten the screw.

Operation

IMPORTANT!
Always observe the information contained in the section: Safety instructions.

Rotary switch

• The rotary switch should be set to the correct range /function before each use.
• When a function is selected, a beep will sound and the display will update.

Power ON/OFF

• The product is switched off when the function switch is in the OFF position.
• Switch the power OFF after use.

Auto shut-off

• Auto shut-off is active by default, it is indicated by the symbol.
• This energy-saving feature will shut power off after approximately 15 minutes of no activity.

To disable auto shut-off:

1. Set the rotary switch to OFF.
2. Press and hold the SELECT button and then set the rotary switch to any posi-tion other than OFF.
   • The symbol will disappear and an alert will sound when disabled.
3. Auto shut-off will reactivate after the power is switched OFF.

Display hold

Important:

• The display hold function freezes the display.
• The display hold should be switched OFF before taking measurements.
• Press the HOLD button to switch the display hold ON/OFF.
• The hold icon will appear when the display hold is ON.

Maximum/minimum value display
In this mode, the display shows the “MIN” (minimum) or “MAX” (maximum) value measured.

1. Press and hold the REL/ZERO [MAX/MIN] button to enter maximum/minimum value display mode.
2. Press the MAX/MIN button repeatedly to toggle between modes.
   • The display will show “MAX” or “MIN” to indicate which mode is active.
3. Press and hold the MAX/MIN button to exit this mode.

Work light

• Press and hold the button to switch the work light ON / OFF.

Relative mode
Relative mode can be used to take differential readings between two test points or for tracking changes in measurements from a defined reference point (e.g., line losses).

1. Select a range using the rotary switch: 20A , 200A .
2. Take a measurement and note the displayed value.
3. Press the REL button to activate the relative mode.
   • “REL” will appear on the display to indicate relative mode is active.
4. Take another measurement.
   • The display will show the difference between the new reading and the initial reading.
5. Press the REL button to exit relative mode.
6. Switch the power OFF after use.

Current measurement “A”

Alternating current (AC) measurement

Risk of electric shock!
Do not use the clamp on uninsulated conductors.

1. Unclamp the conductor if (overload) appears on the display.
2. This product is rated for 50-60Hz. Do not exceed this frequency range as higher frequencies can dangerously overheat the magnetic circuit.

Notes:

• The current sensing clamp is magnetized and a low reading may appear even when no conductor has been covered.
• Only one conductor should be covered by the current sensing clamp.

1. Select a range using the rotary switch: 20A~, 200A~.
2. Clamp the jaws around the conductor to be measured, positioning it between the jaw alignment marks ►◄.
   • The reading will show on the display.
3. Carefully remove the clamp from the conductor after taking measurements.
4. Switch the power OFF after use.

Direct current (DC) measurement
Risk of electric shock! Do not use the clamp on uninsulated conductors.

• Unclamp the conductor if (overload) appears on the display.
• This product is rated for 50-60Hz. Do not exceed this frequency range as higher frequencies can dangerously overheat the magnetic circuit.

Notes:

• The current sensing clamp is magnetized and a low reading may appear even when no conductor has been covered.
• Only one conductor should be covered by the current sensing clamp.
• For direct current measurements, the polarity of the clamp must match the flow of current along the conductor. A minus sign “-” will appear in front of the reading if the polarities are reversed.
• Polarity symbols are indicated on the front and back of the jaw.

1. Select a range using the rotary switch: 20A , 200A .
2. Press the SELECT button to enter DC mode.
   • The display will show “DC”.
3. Press the REL/ZERO button to perform a zero adjustment.
4. The display will show “ZERO”.
5. Clamp the jaws around the conductor to be measured, positioning it between the jaw alignment marks ►◄.
   • The reading will show on the display.
6. Carefully remove the clamp from the conductor after taking measurements.
7. Switch the power OFF after use.

Voltage measurement “V”

WARNING:
Observe all safety precautions when working on live voltages.

AC voltage measurement

1. Set the rotary switch to V~.
   • The display will show “AC” and “V”.
2. Connect the test leads to the input terminals:
   • The black test leads to the negative input terminal: COM.
   • The red test leads to the positive input terminal: V.
3. Touch the test probe tips across the circuit or component under the test. It may take a few moments for the reading to stabilize.
   • The measurement will show on the display.
   • The display will show an icon (overload) if the measuring range is exceeded or the circuit is interrupted.
4. Disconnect the test leads and switch the power OFF after use.

DC voltage measurement

1. Set the rotary switch to V .
2. Press the SELECT button to enter DC mode.
   • The display will show “DC” and “mV”.
3. Connect the test leads to the input terminals:
   • The black test leads to the negative input terminal: COM.
   • The red test leads to the positive input terminal: V.
4. Touch the test probe tips across the object under test (e.g., circuit, battery). It may take a few moments for the reading to stabilize.
   • The measurement will show on the display.
   • The display will show an icon (overload) if the measuring range is exceeded or the circuit is interrupted.
   • A minus sign “-” will appear in front of the reading if the polarities are reversed.
5. Disconnect the test leads and switch the power OFF after use.

Resistance measurement

WARNING:
Never test on a live circuit. Remove all power from the circuit and discharge all capacitors before testing.

1. Set the rotary switch to Ω.
   • The display will show “k” or “M” + Ω”.
2. Connect the test leads to the input terminals:
   • The black test led to the negative input terminal: COM
   • The red test leads to the positive input terminal: Ω.
3. Touch the test probe tips across the circuit or component under the test. It may take a few moments for the reading to stabilize.
   • The measurement will show on the display.
4. Disconnect the test leads and switch the power OFF after use.

Capacitance measurement

WARNING:
Never test on a live circuit. Remove all power from the circuit and discharge all capacitors before testing.

1. Set the rotary switch to:
2. Press the SELECT button until the display shows “n” and “F”.
3. Connect the test leads to the input terminals:
   • The black test leads to the negative input terminal: COM.
   • The red test leads to the positive input terminal:
4. Touch the test probe tips across the capacitor under the test. It may take a few moments for the reading to stabilize.
   • The measurement will show on the display.
   • The display will show an icon (overload) if the measuring range is exceeded or the circuit is interrupted.
5. Disconnect the test leads and switch the power OFF after use.

Tips:
If the capacitance being measured is ≤1μF, perform a zero adjustment to remove stray capacitance in the test leads and internal circuitry. This will improve measurement accuracy.

1. Enter capacitance measurement mode.
2. Press the REL/ZERO button, the display will show “ZERO”.
   • A zero adjustment has been performed.

Temperature measurement
The included thermocouple has an exposed welded junction for quick response times.

Risk of electric shock!
The temperature probe must not make contact with voltage and/or current- carrying components.

• Do not exceed the rated maximum temperature of the thermocouple. See section: Technical data.
• Observe polarity. Reversing the positive (+) and negative (-) leads may produce incorrect temperature readings.

1. Set the rotary switch to °C°F.
2. Press the SELECT button to switch between “°C” and “°F” units of temperature measurement.
   • The selected unit will show on the display.
3. Connect the thermocouple to the input terminals. Make sure the plug markings match the terminal input markings: COM and °C.
4. Grip the plug to disconnect the thermocouple and switch the power OFF after use.

Tips:

• A jumper (e.g. connecting the test lead probe tips) can be used to check if the clamp meter is at the correct operating temperature after storage.
• Bridge the connection between the input terminals COM and °C.
• Temperature measuring response will be slower than using a dedicated thermocouple.

Continuity test

WARNING:
Never test on a live circuit. Remove all power from the circuit and discharge all capacitors before testing.

1. Set the rotary switch to:
2. Press the SELECT button until the display shows “ “.
3. Connect the test leads to the input terminals:
   • The black test leads to the negative input terminal: COM.
   • The red test leads to the positive input terminal:
4. Touch the test probe tips across the circuit or component under the test.
   • A constant tone will sound if the resistance is <10 Ω.
   • The display will show an icon (overload) if the measuring range is exceeded or the circuit is interrupted.
5. Disconnect the test leads and switch the power OFF after use.

Diode test

WARNING:
Never test on a live circuit. Remove all power from the circuit and discharge all capacitors before testing.

Forward test:

Reverse test:

1. Set the rotary switch to:
2. Press the SELECT button until the display shows “ “.
3. Connect the test leads to the input terminals:
   • The black test leads to the negative input terminal: COM.
   • The red test leads to the positive input terminal:
4. Touch the test probe tips across the diode under test.
   • Forward test voltages: will show on the display as a voltage reading.
   • Reverse test voltages: will show on the display as “ “.
   • A defective diode (interrupted): will show on the display as “ “.
5. Disconnect the test leads and switch the power OFF after use.

Non-contact voltage testing

• The non-contact voltage (NCV) detection function can detect AC voltage on conductors without touching them.
• Due to the high-sensitivity sensor, static electricity or other sources of energy may trigger the sensor. This is a normal operation.

Risk of electric shock!

• Before use, always test the voltage detector on a known live circuit to ensure safe operation.
• Insulation type, thickness, and distance from the voltage source may affect detection.
• Always verify measurements using test leads before touching potentially energized circuits.

1. Set the rotary switch to NCV.
   • “NCV” and “EF” will appear on the display.
2. Place the sensor tip near the conductor.
   • If AC voltage is present, the tri-colour LED will light and a beep will sound.
3. If the detected voltage increases:
   • the beeping will get faster.
   • the tri-colour LED changes from green → yellow → red.
4. Switch the power OFF after use.

Cleaning

Risk of electric shock!
Disconnect the product from any input signals and switch the power OFF before cleaning.

Important:

• Do not use aggressive cleaning agents, rubbing alcohol or other chemical solutions. They damage the housing and can cause the product to malfunction.
• Do not immerse the product in water.
• Clean the product with a clean, lint-free, antistatic cloth. Lightly moisten if needed.
• Check to make sure the clamp mating surface is clean. Trapped dirt or debris can result in measurement errors.

Disposal

Product

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 batteries 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-de-structive manner 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):

• in our Conrad offices
• 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.

(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 of household waste is forbidden. The abbreviations for heavy metals in batteries are:
Cd = Cadmium, 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 municipality, our stores or wherever (rechargeable) batteries are sold. You thus fulfil your statutory obligations and contribute to environmental protection. Batteries/rechargeable batteries that are disposed of should be protected against short circuits and their exposed terminals should be covered completely with insulating tape before disposal. Even empty batteries/rechargeable batteries can contain residual energy that may cause them to swell, burst, catch fire or explode in the event of a short circuit.

Technical data

General

• Power supply………………………. 2x AAA 1.5 V batteries
• Measuring categories ……………
  • CAT II 600 V
  • CAT III 300 V
• Current measurement (AC) …… max. 200 A
• Display………………………………..
  • 2000 counts
  • (2 – 3 renewals/sec.)
• Clamp opening range …………… 16.5 mm
• Automatic shut-off………………… approx. 15 mins
• Display type………………………… EBEN
• Pollution degree…………………… 2
• Operating altitude ………………… max. 2000 m (above sea level)
• Operating temperature …………. 0 to +40 °C
• Operating humidity ……………….
  • <75 % RH (0 to +30 °C)
  • <50 % RH (+30 to +40 °C)
• Storage temperature…………….. -10 to +50 °C
• Storage humidity…………………..
  • <75 % RH (0 to +30 °C)
  • <50 % RH (+30 to +40 °C)
• Dimensions (W x H x D) ……….. 182 x 60 x 36 mm
• Weight ……………………………….. approx. 194 g

Test leads and probes

• Rated voltage ……………………… CAT III 1000 V
• Rated current………………………. 10 A
• Protection class …………………… II

Thermocouple

• Thermocouple type ……………… K
• Temperature (max.)……………… 230 °C (446 °F)
• Length………………………………… 1 m

Specifications

Accuracy

• Specified accuracy ± (% of the reading + display error in counts).
• Accuracy is maintained for 1 year at +23 °C (± 5 °C), ≤75 % RH (non-condensing).

Calibration

• The recommended calibration interval is 1 year.
• Calibration should only be performed by qualified personnel.

Alternating current (AC)

Overload protection: 200.0 A; Frequency range: 50-60 Hz; TrueRMS
Range| Resolution| Accuracy
---|---|---
Crest factor (CF):

■    Crest factor 1.0 – 2.0: +3 % deviation

■    Crest factor 2.0 – 2.5: +5 % deviation

■    Crest factor 2.5 – 3.0: +7 % deviation

Direct current (DC)

■    Overload protection: 200.0 A

■    Accuracy: After successful zero adjustment

AC voltage

Overload protection: 600 V; Frequency range: 45 – 400 Hz; Impedance: 10 MΩ
Crest factor (CF):

■    Crest factor 1.0 – 2.0: +3 % deviation

■    Crest factor 2.0 – 2.5: +5 % deviation

■    Crest factor 2.5 – 3.0: +7 % deviation

DC voltage

Overload protection: 600 V; Impedance: 10 MΩ

Resistance

Overload protection: 600 V

Capacitance

Overload protection: 600 V

Temperature

Diode test

• Test voltage………………………… approx. 3.2 V
• Resolution…………………………… 1 mV
• Overload protection ……………… 600 V

Acoustic continuity text

• Tone ………………………………….. <10 Ω continuous
• Resolution…………………………… 0.1 Ω
• Overload protection ……………… 600 V

Non-contact (AC) voltage test

• Test voltage………………………… 100 – 600 V/AC
• Test distance ………………………. ≤5 mm

This is a publication by Conrad Electronic SE, Klaus-Conrad-Str. 1, D-92240 Hirschau (www.conrad.com). All rights including translation reserved. Reproduction by any method (e.g. photocopying, microfilming or the capture in electronic data processing systems) requires prior written approval from the editor. Reprinting, also in part, is prohibited. This publication reflects the technical status at the time of printing.

Copyright by Conrad Electronic SE
*2893197_V2_1223_dh_mh_en 18014399488664075-2 I3/O2 en

www.conrad.com/contact.

References

• Conrad Electronic » Alle Teile des Erfolgs
• Conrad Electronic » All parts of success
• Contact
• Conrad Electronic » All parts of success

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