DVM401 Rev. 02
09.01.2014 ©Velleman nv
9
SOUND
Sound Level Measurement Range
A-weighting LO (low): 35 – 100dB
A-weighting HI (high): 65 – 130dB
C-weighting LO (low): 35 – 100dB
C-weighting HI (high): 65 – 130dB
resolution 0.1dB
Typical Frequency Range 30Hz to 10KHz
Frequency Weighting A- & C-weighting
Time Weighting fast
Maximum Hold max. value does not change if the
increase in volume < 1.5dB / 3 min.
Accuracy ±3.5dB at 94dB, 1KHz sine wave
Microphone electret condenser microphone
LIGHT
Measuring Range 20, 200, 2000, 20000Lux (20000Lux
reading x 10)
Overrange Indication “1”
Accuracy ±5% of reading + 10 digits (calibrated
with standard incandescence lamp at a
colour temperature of 2856K)
Thermal sensitivity ±0.1°C
Photo detector silicon photo diode with filter
HUMIDITY/TEMPERATURE
Humidity Measurement Range 25 to 95%RH
Temperature Range -20°C to +50°C (-4°F to +122°F) with
built-in temperature sensor
-20 to +200°C (-4°F to +200°F) for
low range
-20 to +750°C (-4°F to +1400°F) for
high range
Resolution 0.1%RH, 0.1°C/0.1°F low range,
1°C/1°F high range
Accuracy (after calibration)
Humidity ±5%RH (at 25°C, 35 to 95%RH)
Humidity Sensor Response Time ±6 min.
Temperature ±3% rdg ±2°C (from –20°C to
+200°C)
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