DVM401 VELLEMAN 1
DVM401 – 3 ½-DIGIT 4-IN-1 DMM
1. Introduction
This device combines the functions of sound level meter, light meter, humidity meter and temperature meter and can
be used both professionally and at home.
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 automatically compensates for the angle of
incidence. The light-sensitive component is a very stable long-life 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 humidity & temperature measuring function is for use a humidity/semiconductor sensor and K-type
thermocouple.
2. Features
• the device measures sound levels, luminous intensity, temperature and humidity
•
the 3 1/2–digit LCD displays the following units : Lux, °C, %RH, C & dB and A & dB
• low-battery indication
• luminous intensity from 0.01 to 20000Lux
•
sound level range (resolution 0.1dB)
A-weighting LO (low) : 35 – 100dB
A-weighting HI (high) : 65 – 130dB
C-weighting LO (low) : 35 – 100dB
C-weighting HI (high) : 65 – 130dB
• humidity measurements from 25 to 95%RH, fast response and resolution 0.1%RH
•
temperature measuring levels from –20°C to +750°C / -4°F to +1400°C
3. Specifications
Display 1999 counts and the following indications : dB, A & dB, C & dB, Lo & dB,
Hi & dB, MAX HOLD, DATA HOLD indication
Polarity automatic negative polarity indication
Overrange Indication “OL”
Low-Battery Indication “BAT” is displayed when the battery’s voltage drops below the operating
level
Measurement Rate 1.5 measurements per second, nominal.
Storage Temperature -10°C to 60°C (14°F to 140°F)
Auto Power Off after ± 10 minutes of inactivity
Power Source one 9V-battery (e.g. 6F22)
Dimensions 251 x 63.8 x 40 (H x W x D)
Dimensions Photo detector 115 x 60 x 27mm
SOUND
Sound Level Measurement Range A-weighting LO (low) : 35 – 100dB
A-weighting HI (high) : 65 – 130dB
C-weighting LO (low) : 35 – 100dB
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