407764 Datasheet, PDF (2/12 Pages) Extech Instruments Corporation. – Datalogging Sound Level Meter

Specifications
Applicable Standards
Accuracy
Frequency range
Measuring level
Frequency weighting
Microphone
Display
Bargraph
Sampling rate
Memory size
Datalogging sample rate
Time weighting
MAX
Level ranges
Auto range
Linearity range
Alarm function
AC output
DC output
Power supply
Battery life
AC adapter
Operating temperature
Operating humidity
Storage temperature
Storage humidity
Memory size
RS-232 Interface
Dimensions
Weight
Accessories
IEC651 Type 2, ANSI S1.4 Type 2
±1.5dB (under reference conditions)
31.5Hz - 8KHz
30 - 130dB
A and C
0.5” Electret condenser microphone
4-digit LCD
Resolution: 0.1dB
Display period: 0.5 sec.
50dB scale (1dB steps). Display period: 50mS; Auto-ranging:
100dB scale, 2dB steps
50mS
128,000 records / 255 sets (non-volatile memory)
1 to 86,400 seconds per record
FAST: 125mS, SLOW: 1 sec.
Maximum reading held
30-80dB, 40-90dB, 50-100dB, 60-110 dB, 70-120dB, 80-130dB
(Total of 6 ranges)
30 to 130dB
50dB
OVER indicator for readings higher than high limit.
UNDER indicator for readings lower than low limit.
0.707 Vrms at Full Scale
Output impedance approx. 600Ω
10mV / dB
Output impedance approx. 100Ω
Four 1.5V ‘AA’ batteries
Approx. 30 hrs continuous operation
Voltage: 6VDC
Voltage Ripple: < 100mVpp
Supply Current: > 100mADC
Socket: Pin Ground
Casing: Positive
External Diameter: 3.5mm
32 to 104^oF (0 to 40^oC)
10 to 80%RH
14 to 140^oF (-10 to 60^oC)
10 to 80%RH
128,000 data records with Date and Time Stamping
Baud rate: 9600bps
10.4 x 2.8 x 1.4” (265 × 72 × 35mm
Approx. 11.5 oz. (358g) including battery
Batteries, carrying case, screwdriver, windscreen, 3.5mm plug, RS-232
cable , Windows^TM compatible software.
Safety symbols
CE
Meter is protected throughout by double insulation or reinforced
insulation.
Complies with EMC
2
Model 407764 Version 2.1 9/07