Velleman DVM1190 User Manual

DVM1190 – DIGITAL MULTIMETER

1. Introduction

Thank you for buying the DVM1190. This digital multimeter has a large LCD, a data-hold function and a backlight.
The device uses a very practical safety mechanism that keeps the user from connecting measuring leads to the
wrong jacks It is ideal for use in open air, workshops and schools and for home and hobby applications.

2. Safety

The meter complies with the standards IEC-1010-1, CAT.II 1000V and CAT. III 600V overvoltage.
Respect the following safety instructions to ensure maximum personal safety and to keep the device itself in good
working order :

• Protect yourself against electroshocks.

• Do not use this device for any other application than those described in this manual.

• Do not use the device around explosive gases, vapour or dust.

• Disconnect the circuit you wish to test and discharge all capacitors before measuring resistance, continuity,

diodes or capacity.

• Measure a known voltage to verify the meter's operation. Have the device serviced if the measurement of that

known voltage doesn't yield the expected result.

• Connect the black test lead with the COM jack first and then connect the red test lead with the jack of your

choice; always disconnect the red test lead and then the black one.

• For current measurements you should check the meter's fuse and turn off the power to the circuit under test

before connecting the meter to the circuit.

• This device comes with a number of safety mechanisms: a varistor protects the Ω and V connection against

transients > 1000V. A PTC resistor protects the device against overvoltages up to 1000V during resistance,
capacity, temperature, continuity and diode measurements.

• This meter's VΩ, µA/mA and A connections are protected against the faulty connection of test leads. The jacks

that can't be used for the selected function are closed off. The selector closes off all jacks that cannot be used
with the function currently selected. The selector is blocked when it encounters a function that is incompatible with
the selected jack. Remove the red test lead first and install a new range or function.

• Make sure the device was not damaged in transit.

• Make sure the insulation of the test leads is not damaged and/or the wire itself is not exposed.

• Full compliance with safety standards can only be guaranteed if the device is used with the supplied test leads. If

necessary, they should be replaced with identical leads or leads with identical electric ratings. All test leads
should be in good working order.

• Never exceed the specified limit values for the various measurement ranges.

• Do not touch unused terminals when the meter is connected to a circuit.

• Place the range selector switch in the highest position if the value to be measured is unknown beforehand.

• Do not measure voltages > 1000V above earth ground in Cat. II installations or 600V in Cat. III installations.

• The REL∆ symbol is displayed when the relative mode is activated. Beware of dangerous voltages.

• Exercise extreme caution when working with voltages in excess of 60VDC or 30Vrms AC. Keep your fingers

behind the probe barriers while using the device.

• Do not connect the leads to a voltage source while the function switch is in one of the following modes : current,

resistance, capacitance, inductance, temperature, frequency, diode, transistor or continuity.

• Disconnect all test leads from the circuit to be tested prior to selecting a different function or range.

• When performing measurements on TV's or switching power circuits, the user should keep in mind that voltage

surges may occur at test points. These surges may damage the meter.

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• Never perform resistance and continuity measurements on live circuits.

• Never perform capacitance measurements unless the capacitor in question has been fully discharged.

• Have the device checked by a qualified technician in case of malfunction.

• Never use the meter if the back panel is not in place and firmly fixed.

• Do not use or store the device in areas exposed to direct sunlight, high temperatures or high humidity.

2.1. Symbols

Important safety information,
consult the manual !

Double insulation

DC (direct current)

AC or DC (alternating current or direct current)

Earth ground

Fuse

Low battery

AC (alternating current)

2.2 Maintenance

• Do not remove the back cover while a voltage is being applied. Only a qualified technician can handle repairs.

• Always disconnect the test leads from all current sources before opening the meter.

• Replace the three AAA batteries when the symbol is displayed.

• Replace blown fuses with an identical one or a fuse with identical voltage and current ratings : F 200mA/250V
(quick-acting, max. resistance 2Ω), F 10A/250V (“quick-acting”).

• Use a damp cloth and a mild detergent to clean the device. Never apply abrasives or solvents.

• Place the power switch in the OFF position when the device is not being used

• Remove the batteries to keep them from leaking if the device is to be stored for a prolonged period of time.

3. Front Panel Description

1. LCD display

2. Keypad

3. Rotary switch

4. Terminals

5. Battery cover

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4. LCD Description

Number Symbol Explanation

1

2 - Indicates negative readings

3
4

5 AUTO Autorange indicator
6
7
8 DATA-H Indicator for data -hold mode

9
10 °C Temperature measuring unit
11 V, mV

A, mA, µA

MΩ, kΩ, Ω

12 OL Overrange indication

REL∆

Low-battery indicator

Indicator for AC voltage and AC current
Indicator for DC voltage and DC current

Indicator for diode test mode
Indicator for continuity check

Indicator for relative measurement mode

The unit of voltage
The unit of current
The unit of resistance

5. Accessories

• user manual

• test leads

• 'K'-type thermocouple

• multifunctional socket

6. Operating Instructions

6.1. Data-Hold Mode

Press the HOLD button to activate the data-hold mode ("DATA-H" is displayed). Enabling this function in the
autorange mode makes the device switch to manual ranging mode. The measured value is saved and the selected
range remains the same. Cancel the data-hold function by changing the measurement mode, pressing the RANGE
button or pressing the HOLD button again.

6.2. Manual Ranging and Autorange Mode

In the autorange mode the meter automatically selects the best range, allowing you to switch test points without
having to reset the range. In the manual mode the user selects the range, making it possible to lock the meter in a
specific range.
AUTO is displayed when the device is in the autorange mode. The autorange mode is the default mode for
measurement functions involving more than one range.
Press the RANGE button to enter the manual ranging mode (AUTO is erased from the display). The range increases
every time RANGE is pressed. The meter jumps to the lowest range if you press RANGE while the highest range is
selected. Exit the manual ranging mode by holding the RANGE button for two seconds. The meter returns to the
autorange mode and AUTO is displayed.

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