Velleman DVM501 Manual
DVM501 VELLEMAN
1
DVM501 – 3 ½-DIGIT 5-IN-1 DIGITAL MULTIMETER
1. Introduction
This device combines the functions of sound level meter, light meter, humidity meter, temperature meter and digital
multimeter for both professional and home use in an easy-to-use pocket-size lightweight device with a 3 1/2–digit
large LCD for your reading convenience.
The sound level function can be used to measure sound levels in schools, offices, airports, etc. and to check the
acoustics of auditoriums, studios and hi-fi installations.
The light function is used to measure luminous intensity. The device is fully cosine corrected for the angle of
incidence. The light-sensitive component is a very stable long-life silicon diode.
Measure temperatures using the built-in temperature-sensitive semiconductor or the K-type thermocouple.
Perform relative humidity measurements with the built-in semiconductor.
The digital multimeter can be used for measuring AC/DC voltage, DC current, resistance, diodes and transistor hFE.
It also features an audible continuity test.
2. Safety precautions
• Do not use your DVM501 if the device itself or the test leads look damaged, or if you suspect that it is not
operating properly.
• Never ground yourself when making electrical measurements. Do not touch exposed metal objects which might
be at ground potential. Keep your body isolated from ground by wearing dry clothing and shoes with rubber soles
and using rubber mats or other approved insulating material.
• Turn off the power to the circuit under test before uniting, unsoldering or breaking it. Current can be dangerous.
• Be cautious when working above 60Vdc or 30Vac as such voltages pose a shock hazard.
• When using the probes, make sure to keep your fingers behind the finger guards on the probes.
• Measuring voltage that exceeds the limits of the multimeter may damage your DVM501 and expose the operator
to a shock hazard. Always respect the meter voltage limits as stated on the front of the meter.
3. Specifications
Display
1999 counts and the following indications: Lux, °C, %, dB
Polarity
automatic negative polarity indication
Overrange indication
“OL”
Low-Battery indication
“BAT” is displayed when the battery voltage drops below operating level
Measurement rate
1.5 times per second, nominal
Operating temperature
0°C to 50°C (32°F to 122°F) @ <70%RH
Storage temperature
-10°C to 60°C (14°F to 140°F) @ <80%RH
Power source
one 9V-battery (e.g. 6F22)
Dimensions
121.5 x 61 x 40 (H x W x D)
Weight
approx. 280g including holster
Fuse
F 250V / 200mA fast blow
All accuracy indications below are valid for 18-28°C (65-83°F) @ <70% RH.
SOUND
Measurement Range
35 – 100dB (C-weighting) @ resolution 0.1dB
Typical Frequency Range
30Hz to 10kHz
Time Weighting
fast
Accuracy
±3.5dB at 94dB, 1kHz sine wave
Microphone
electric condenser microphone