Velleman DVM401 Kurzanleitung Seite 2

Typical Frequency Range
Frequency Weighting
Time Weighting
Maximum Hold
Accuracy
Microphone
Measuring Range
Overrange Indication
Accuracy
Thermal sensitivity
Photo detector
Humidity Measurement Range
Temperature Range
Resolution
Accuracy (after calibration)
Humidity
Humidity Sensor Response Time
Temperature
Input Protection
4 Front Panel Description
1. LCD display : 3 ½-digit LCD. Displays a wide
variety of units (Lux, x 10 Lux, °C, °F, %RH,
dB, A, C, Lo, Hi) and also gives 'BAT', 'MAX
HOLD' and 'DATA HOLD' indications.
2. Power button : activates or deactivates the
device
3. Select button : Used to select function and
range
4. MAX HOLD : Press this button to hold the
maximum reading. Press again to release the
reading and continue your measurements.
5. DATA HOLD : Press the HOLD button to hold
a particular reading and press it again to
continue your measurements.
DVM401
C-weighting HI (high) : 65 – 130dB
resolution 0.1dB
30Hz to 10KHz
A- & C-weighting
fast
max. value does not change if the increase in volume < 1.5dB / 3 min.
±3.5dB at 94dB, 1KHz sine wave
electret condenser microphone
LIGHT
20, 200, 2000, 20000Lux (20000Lux reading x 10)
"1"
±5% of reading + 10 digits (calibrated with standard incandescence lamp
at a colour temperature of 2856K)
±0.1°C
silicon photo diode with filter
HUMIDITY / TEMPERATURE
25 to 95%RH
-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
0.1%RH, 0.1°C/0.1°F low range, 1°C/1°F high range
±5%RH (at 25°C, 35 to 95%RH)
±6 min.
±3% rdg ±2°C (from –20°C to +200°C)
±3.5% rdg ±2°C (from –20°C to +750°C)
±3% rdg ±2°F (from –4°F to +200°F)
±3.5% rdg ± 2°F (from –4°F to +1400°F)
60V DC or 24V AC rms
2 V