velleman DVM93 Multifunctional Digital Multimeter User Manual

velleman DVM93 Multifunctional Digital Multimeter User Manual

Overview

1. LC-Display
2. FUNKTIONS- UND BEREICHSSCHALTER
3. “mA”-BUCHSE
4. “COM”-BUCHSE
5. “10A”-BUCHSE
6. “V/Ω”-BUCHSE

COPYRIGHT NOTICE
This manual is copyrighted. The copyright to this manual is owned by Velleman nv. All worldwide rights reserved. No part of this manual may be copied, reproduced, translated or reduced to any electronic medium or otherwise without the prior written consent of the copyright holder.

Introduction

To all residents of the European Union Important environmental information about this product
 This symbol on the device or the package indicates that disposal of the device after its lifecycle could harm the environment. Do not dispose of the unit (or batteries) as unsorted municipal waste; it should be taken to a specialized company for recycling. This device should be returned to your distributor or to a local recycling service. Respect the local B cnvironmental rules. If in doubt, contact your local waste disposal authorities. Your DVM93 is a CAT II 600 digital multi-meter with a 3 2 digit LCD display. It is suited for professional, academic and home applications. The DVM93 measures DC and AC voltage, DC and AC current, resistance, continuity; diode, transistor (hFE) and battery testing.
Thank you for choosing Velleman! Please read the manual thoroughly before bringing this device into service. If the device was damaged in transit, do not install or use it and contact your dealer. Refer to the Velleman® Service and Quality Warranty on the last pages of this manual.

Used symbols

**| This symbol indicates: Read instructions Not reading the instructions and manual can lead to damage, injury or death.
---|---
**| This symbol indicates: Danger A hazardous condition or action that may result in injury or death

| This symbol indicates: Risk of danger/damage Risk of a hazardous condition or action that may result in damage, injury or death
**| This symbol indicates: Attention; important information Ignoring this information can lead to hazardous situations.
**| AC (Alternating Current)
| DC (Direct Current)
| Both AC and DC
| Double insulation (class II-protection)
| Earth
| Fuse
| Capacitor
| Diode
| Continuity
| on/off

Warnings and safety Instructions

| Read this manual thoroughly. Familiarise yourself with the functions of the device before actually using it.
---|---
****| Only use the device for its intended purpose. Using the device in an unauthorized way will void the warranty. Damage caused by disregard of certain guidelines in this manual is not covered by the warranty and the dealer will not accept responsibility for any

ensuing defects or problems.

| Follow the instructions below to guarantee a safe use of the meter and all its functionalities.
| During use of the meter, respect all directives concerning protection against electroshocks and misuse. Never exceed the indicated limits.
**| WARNING** :

This instrument does not contain operator servicable parts. Service by qualified persons only.

Remark: refer to the warning on the back of the meter (top).

**| WARNING: To avoid electrical shock always remove the test leads prior to opening case. To prevent fire, install fuses with AMP/VOLT rating as shown.
**| Remark: refer to the warning on the battery compartment
| Keep the device away from children and unauthorised users.
| Protect this device from shocks and abuse. Avoid brute force when operating.
**| Avoid cold, heat and large temperature fluctuations. When the u it is moved from a cold**

to a warm l cation, leave it switched off until it has re ched roo temperature. This to avoid condensation and measuring errors.

**| This is an installation category CAT II 600V measuring instrument. Never use this equipment in a higher category than indicated. Refer to §4 Overvoltage**

/installation category.

**| Pollution degree 2-device. For indoor use only. Keep this device away from rain,**

moisture, splashing and dripping liquids. Not for industrial use. Refer to §5 Pollution degree.

**| Before each use, make sure the test probes are in good condition. Always place your**

fingers behind the protective edges of the test probes while measuring! Never touch free terminals when the meter is connected to a circuit.

**| Make sure the meter is in the appropriate measuring range before connecting it to a test circuit.
**| Risk of electric shock during operation. Be very careful when measurin live circuits. Use extreme caution when measuring voltages higher than 60Vdc or 30Vac rms.
**| Do not measure circuits that may contain voltages > 600V
**| Do not measure current in circuits with voltages > 250V
**| Do not conduct resistance, diode- or continuity measurements on live circuits. For testing transistors use the included adaptor socket.
**| When measuring currents up to 10A, max. 15s continuous measurement followed by a 15 minutes break between 2 measurements.
**| When carrying out measurements on a TV set or switching power circuits, always be aware that high amplitude voltage pulses at the test points might damage the meter.
**| Do not replace internal parts yourself. Replace damaged or lost accessories by identical ones with the same specifications. Order spare accessories e.g. test probes at your

dealer.

**| Switch off the meter and remove test probes prior to replacing the battery or fuses.
**| All modifications of the device are forbidden for safety reasons. Damage caused by user modifications to the device is not covered by the warranty.

Overvoltage/installation category

DMMs are categorized depending on the risk and severity of transient overvoltage that might occur at the point of test. Transients are short-lived bursts of energy induced in a system, e.g. caused by lightning strike on a power line.

The existing categories according EN 61010-1 are:

CAT I| A CAT I-rated meter is suitable for measurements on protected electronic circuits which are not directly connected to mains power, e.g. electronics circuits, control signals…
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CAT II| A CAT II-rated meter is suitable for measurements in CAT I-environments and mono-phase appliances which are connected to the mains by means of a plug and circuits i a normal domestic environment, provided that the circuit is at least 10m apart from a CAT III- or 20m apart from a CAT IV- environment. E.g. household appliances, portable tools…
CAT III| A CAT III-rated meter is suitable for measurements in CAT I- and CAT II-environments, as well as for measurements on (fixed) mono- or poly-phased appliances which are at least 10m apart from of a CAT IV-environment, and for measurements in or on distribution level equipment (fuse boxes, lighting circuits, electr c ovens).
CAT IV| A CAT IV-rated meter is suitable for measuring in CAT I-, CAT II- and CAT III-environments as well as on the primary supply level.Note that for all measurements on equipment for which the supply cables run outdoors (either overhead or underground) a CAT IV meter must be used.

Warning:
This device was designed in accordance with EN 61010-1 installation category CAT II 600V. This implies that certain restrictions in use apply that are related to voltages and voltage peaks which can occur within the environment of use. Refer to the table above.

This device is only suitable for measurements up to 600V in a CAT II environment.

Pollution degree

IEC 61010-1 specifies different types of pollution environments, for which different protective measures are necessary to ensure safety. Harsher environments require more protection, and the protection against the pollution which is to be found in a certain environment depends mainly on the insulation and the enclosure properties. The pollution degree rating of the DVM indicates in whichenvironment the device may be used.

Pollution degree 1| No pollution or only dry, nonconductive pollution occurs. The pollution has no influence (only to be found in hermetically sealed enclosures).
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Pollution degree 2| Only nonconductive pollution occurs. Occasionally, temporary conductivity caused by condensation is to be expected (home and office environments fall under this category).
Pollution degree 3| Conductive pollution occurs, or dry nonconductive pollution occurs that becomes conductive due to condensation that is to be expected (industrial environments and environments exposed to outside air – but not in contact with precipitation).
Pollution degree 4| The pollution generates persistent conductivity caused by conductive dust or by rain or snow. (exposed outdoor environments and environments where high humidity levels or high concentrations of fine particles occur)

Warning:
This device was designed in accordance with EN 61010-1 pollution degree 2. This implies that certain restrictions in use apply that are related to pollution which can occur within the environment of use. Refer to the table above.

Maintenance / battery and fuse replacement

a. General maintenance:

• Wipe the device regularly with a moist, lint-free cloth. Do not use alcohol, solvents or abrasive products.

b. Battery/fuse replacement

• Replace the battery as soon as the “=” indication appears on the display. Low/bad batteries can produce false readings. The fuse rarely needs to be replaced and a blown fuse is almost always caused by a human error.
• Switch off the multi-meter.
• Remove test probes from the circuit under test. Remove all test leads from the input jacks.
• Remove the protective cover and release the 2 screws at the back of the meter and gently open the housing.
• Replace the battery (9V 6LF22). Do not use rechargeable batteries and insert following the right polarity.
• Replace the fuse: ceramic – high breaking capacity 6.3x32mm 1 x FS00mA/600V & 1 x F10A/250V
• Close the housing and tighten the 2 screws. Put the protective cover back.

Front panel Description

Refer to the illustrations on page 2 of this manual.

Operating instructions

**| Risk of electric shock during operation. Be very careful when measuring live circuits.
---|---
**| Before measurin , always make sure the meter and/or test probes are not damaged and verify the connections, selected function and range.

• Never exceed the limit value for protection. This limit value is listed separately in the specifications for each range of measurement.
• Do not touch unused terminals when the meter is linked to a circuit which is being tested.
• Only use the meter in the indicated overvoltage/installation category. Never measure voltages that might exceed the indicated category values.
• When a measuring range is unknown, always select the highest possible range and lower to the appropriate range.
• Disconnect the test leads from the tested circuit before rotating the range selector in order to change functions.
• When carrying out measurements on a TV set or switching power circuits, always remember that high amplitude voltage pulses at the test points might damage the meter.
• Always be careful when working with voltages above 60Vdc or 30Vac rms. Keep your fingers behind the probe barriers at all times during measurement.
• Do not measure current in circuits with voltages > 250V
• Never perform resistance, diode, transistor or continuity measurements on live circuits. Make sure all capacitors in the circuit are discharged.
• “Hold” Function: Press HOLD to freeze the value onto the display. Press again to resume normal operation.

DC Voltage measurements

Keep your fingers behind the probe barriers at all times during measurement. Do not touch unused terminals when the meter is linked to a circuit      hich is being tested.

1. Connect the black test lead (-) to the “COM” jack and the red test lead (+) to the “V/Q” jack.
2. Select the appropriate V= range with the FUNCTION switch. When the measuring range is unknown, always select the highest possible range and lower to the appropriate range.
3. Connect the test leads to the circuit.
4. The measured value and the polarity of the red test lead are displayed on the LCD.

AC Voltage measurements

| Do not measure circuits where voltages > 600V CAT II may occur.
---|---
****| Always be careful when working with voltages above 60Vdc or 30Vac rms. Keep your fingers behind the probe barriers at all times during measurement. Do not touch unused terminals when the meter is linked to a circuit      hich is being tested.

1. Connect the black test lead (-) to the “COM” jack and the red test lead (+) to the “V/Q” jack.
2. Select the appropriate V ~ range with the FUNCTION switch. When the measuring range is unknown, always select the highest possible range and lower to the appropriate range.
3. Connect the test leads to the circuit.
4. The measured value appears on the LCD display.

DC current measurements

| Do not measure current in circuits with voltages > 250V
---|---
| Current measurements: mA jack max. 200mA; for measurements up to 10A use the 10A jack. When measuring currents up to 10A, max. 15s continuous measurement followed by a 15 minutes break between 2 measurements.
| Always be careful when working with voltages above 60Vdc or 30Vac rms. Keep your fingers behind the probe barriers at all times during measurement.

1. Connect the black test lead (-) to the “COM” jack and the red test lead (+) to the “mA” jack for measurements of max. 200mA or to the “10A” jack for measurements between 200mA and 10A.
2. Select the A = range with the FUNCTION switch. For measurements < 200mA, when the measuring range is unknown, always select the highest possible range and lower to the appropriate range.
3. Connect the test leads IN SERIES with the load under measurement.
4. The polarity of the red test lead and the measured current are displayed on the LCD.

AC current measurements

use the 10A jack. When measuring currents up to 10A, max. 15s continuous measurement followed by a 15 minutes break between 2 measurements.
****| Always be careful when working with voltages above 60Vdc or 30Vac rms. Keep your fingers behind the probe barriers at all times during measurement.

1. Connect the black test lead (-) to the “COM” jack and the red test lead (+) to the “mA” jack for measurements of max. 200mA or to the “10A” jack for measurements between 200mA and 10A.
2. Select the A~ range with the FUNCTION switch. For measurements < 200mA, when the measuring range is unknown, always select the highest possible range and lower to the appropriate range.
3. Connect the test leads IN SERIES with the load under measurement.
4. The measured value is displayed on the LCD.

Measuring Resistance

Do not perform resistance measurements on live circuits and make sure all capacitors are completely discharged.

1. Connect the black test lead (-) to the “COM” jack and the red test lead (+) to the “V/Q” jack.
2. Select the Q-range with the FUNCTION switch. When the measuring range is unknown, always select the highest possible range and lower to the appropriate range.
3. Connect the test leads with the resistance and read the value from the display.

Remarks :

• The meter may need a few seconds to produce a stable reading for resistance measurements in excess of 1MQ.
• The over-range indication (“1.”) will appear on the display if the input is not connected or if the resistance being measured exceeds the max. value of the selected range.

Testing Diodes
Do not perform diode measurements on live circuits and make sure all capacitors are completely discharged.

1. Connect the black test lead (-) to the “COM” jack and the red test lead (+) to the “V/Q” jack.
2. Select the ®+ range with the FUNCTION switch.
3. Connect the red test lead to the anode and the black test lead to the cathode of the diode to be tested. The forward voltage drop is now displayed. When the connection is reversed, the display shows “1”.

Audible continuity test
Do not perform continuity measurements on live circuits and make sure all capacitors are completely discharged.

1. Connect the black test lead (-) to the “COM” jack and the red test lead (+) to the “V/Q” jack.
2. Select the *) range with the FUNCTION switch.
3. Connect the test probes to two random points of the circuit to be tested. The incorporated buzzer is activated if the resistance between the two test porbes is lower than + 30Q.

Transistor Test (hFE)
Do not perform transistor measurements on live circuits. Use the included adaptor socket.

1. Connect the black test lead (-) to the “COM” jack and the red test lead (+) to the “mA” jack.
2. Select the hFE-range with the FUNCTION switch.
3. Determine whether the transistor is of the NPN- or PNP-type and locate the emitter, the base and the collector. Insert the leads into the proper holes in the included transistor socket.
4. Connect the black test lead (-) to the “COM” terminal and the red test lead (+) to the other terminal of the transistor socket.
5. The display will show the approximate hFE-value at the moment of testing. Base current 10pA, Vce 2.8V.

Battery testing (BATT)
Do not perform battery tests on batteries connected to a circuit.

1. Connect the black test lead to the “COM” jack and the red test lead to the “mA” jack.
2. Set the rotary selector at the “BA ” range that matches the nominal voltage of the battery.
3. Connect the black test lead to the negative pole and the red test lead to the positive pole of the battery.
4. The measured voltage is shown on the display.

Technical specifications

Regulations concerning environment of use:
Use this meter only for measurements in CAT I and CAT II environments (see §4)
Use this meter only in a pollution degree 2 environment (see §5)

General

F10A/250V (ceramic)
Power Supply| 9V alkaline battery 6LR61
Ranging Method| manual
Polarity Indication| ” – ” is displayed
Overrange Indication| ” 1 . ” is displayed automatically
Battery-Low Indication| ”       ” is displayed
Operating Temperature| 0°C to 40°C
Storage Temperature| -10°C to 50°C
Dimensions| 85 x 165 x 32mm
Weight| 340g (incl. battery)

DC Voltage

Input Impedance : 10MQ for all ranges

AC Voltage

Input Impedance : 10MQ for all ranges
Frequency Range : 40 to 400Hz

DC Current

AC Current

Overload Protection : 200mA range ceramic fuse FS00mA/250V- 10A range ceramic fuse F10A/250V 
Frequency Range : 40 to 400Hz

Resistance

Diode and audible continuity test

voltage: ± 2.8Vdc
  2K| Forward test current(DC): ± 1mA Reversed test voltage: ± 2.8Vdc

Battery test

hFE transistortest

Accessories

• Set of test leads
• 1 battery of 9V
• 1 user manual
• 1 transistor test adaptor

Use this device with original accessories only. Velleman nv cannot be held responsible in the event of damage or injury resulted from (incorrect) use of this device. For more info concerning this product and the latest version of this user manual, please visit our website www.velleman.eu. The information in this manual is subject to change without prior notice.

References

• www.odsi.nl – Open source Digital Search & Investigations.
• MAN Truck & Bus Company | MAN Truck & Bus

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