Velleman DVM990BL User Manual

DVM990BL
DIGITAL MULTIMETER MULTIMETRE DIGITAL

OPERATING MANUAL MANUEL D’UTILISATION
DIGITALE MULTIMETER DIGITALES MULTIMETER

BEDIENINGSHANDLEIDING

BEDIENUNGSANLEITUNG

MULTÍMETRO DÍ GITAL
MANUAL DEL USUARIO

1. SAFETY INFORMATION

WARNING

To ensure safe operation, and in order to exploit to the full functionality of the

meter, please follow the directions in this section carefully.

This multimeter has been designed according to IEC-1010 for electronic
measuring instruments, with an overvoltage category CAT II and pollution
category 2.
Follow all safety and operating instructions to ensure that the meter is used
safely and is kept in good operating condition.

1.1. PRELIMINARY

1.1.1. When using the meter, the user must observe all normal safety rules
concerning:

• protection against the dangers of electric current

• protection of the meter against misuse

1.1.2. When the meter is delivered, check that it has not been damaged in
transit.

1.1.3. If in a poor condition due to harsh storage or shipping conditions,
immediately inspect the meter and confirm its condition.

1.1.4. Test leads must be in good condition. Before using check that the test
lead insulation is not damaged and/or the lead wire is not exposed.

1.1.5. Full compliance with safety standards can only be guaranteed if used
with the test leads supplied. If necessary, they must be replaced with
leads of the same type with the same electric ratings.

1.2. DURING USE

1.2.1. Never exceed the protection limit values indicated in the specifications
for each measurement range.

1.2.2. When the meter is connected to a circuit under measurement, do not
touch unused terminals.

1.2.3. If the value to be measured is unknown beforehand, set the range
selector to the highest position.

1.2.4. Do not measure voltage if the voltage on the terminals exceeds 1000V
above earth.

1.2.5. Always be careful when working with voltages above 60V DC or 30V
AC rms, keep your fingers behind the probe barriers while measuring.

DVM990BL VELLEMAN 1

1.2.6. Before rotating the range selector to change functions, disconnect the
test leads from the circuit under test.

1.2.7. Never connect the meter leads across a voltage source while the
function switch is in the current, resistance, diode or continuity mode.
Doing so can damage the meter. When doing measurements on TV or
power switching circuits always remember that there may be high
amplitude voltage pulses at test points which can damage the meter.

1.2.9. Never perform resistance measurements on live circuits.

1.2.10. Never perform capacitance measurements unless the capacitor to be
measured has been fully discharged.

1.2.11. If any faults or abnormalities are observed, the meter should not be
used and it needs to be inspected.

1.2.12. Never use the meter unless the back of the casing is in place and
fastened securely.

1.2.13. Do not store or use the meter in areas exposed to direct sunlight, high
temperature, humidity or condensation.

1.3. SYMBOLS

Important safety information, refer to the operating manual.
Dangerous voltage may be present.
Double insulation (Protection Class II)
Earth

1.4. MAINTENANCE

1.4.1. Do not attempt to adjust or repair the meter by removing the back of
the casing while voltage is applied. Only a technician who fully
understands the danger involved should carry out such operations.

1.4.2. Before opening the meter battery cover, always disconnect the test
leads from all sources of electric current.

1.4.3. For continued protection, only replace the fuse with the specified
voltage and current ratings:

F1: F 200mA/250V (quick acting)
F2: F 10A/250V (quick acting)

1.4.4. Do not use abrasives or solvents on the meter, use a damp cloth and
mild detergent only.

1.4.5. Always set the power switch to the OFF position when the meter is not
in use.

1.4.6. If the meter is to be stored for a long period of time, the batteries
should be removed to prevent damage to the unit.

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2. DESCRIPTION

2.1. NAMES OF COMPONENTS

(1) LCD display
(2) Power switch (POWER)

(3) Black light switch (

)

(4) Data hold switch (H)
(5) Rotary switch
(6) Input socket
(7) Case
(8) Battery door
(9) Brace
(10) Screw

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2.2. FUNCTION AND RANGE SELECTOR

- This meter is a portable professional measuring instrument with a large

LCD and back light for easy reading.

- This meter has built-in protection to prevent the test leads being

connected incorrectly. The input socket for the red test lead senses the
correct functions and ranges. When the rotary switch cannot be turned,
do not force it as it means that the selected range isn’t suitable for what

the red lead is connected to. Pull out the red lead and then select the
required range. This provides protection for the meter in order to avoid
damage through incorrect operation.

- This meter has a data hold function.

- A rotary switch is used to select the functions and the ranges.

3. SPECIFICATIONS

Accuracy is specified for a period of one year after calibration and at

18°C to 28°C (64°F to 82°F) with relative humidity to 75%.

3.1. GENERAL SPECIFICATIONS

• 30 ranges of functions.

• Over range protection for all ranges.

• Operating altitude: 2000m max.

• Max. voltage between terminals and earth: 1000V DC or AC (peak

value)

• Fuse protection: F1 200mA/250V F2 10A/250V

• Display: 28mm LCD, word is 28mm high

• Max display value: 1999 (3 1/2)

• Polarity indication: "-" indicates negative polarity

• Over range indication: displays "1" or "-1"

• Sampling time: approx. 0.4 seconds

• Power supply: 9V battery, 6F22 or NEDA 1604

• Low battery indication: "

" displayed

• Temperature factor: < 0.1 x accuracy / °C

• Operating temperature: 0°C to 40°C (32°F to 104°F)

• Storage temperature: -10°C to 50°C (10°F to 122°F)

• Dimensions: 191 x 82 x 36mm (without holster)

• Weight: approx. 280g (including battery)

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