5
Time weighting (RMS detection): Fast, according to IEC 61672-1 class 2.
Slow, according to IEC 61672-1 class 2.
Impulse, according to IEC 61672-1 class 2.
•
Reference conditions:
Type of the acoustic field: Free
Reference sound pressure level: 94.0dB (related to 20
µ
Pa)
Reference level range: 60 to 120dB
Reference frequency: 1000Hz
Reference temperature: +23
℃
Reference relative humidity: 50%RH
Reference static pressure: 101.325 kPa
Reference incidence direction: Perpendicular to the front of the microphone
diaphragm.
•
Calibration: Acoustic using calibrator TES-1356 or equivalent.
Calibration check frequency is 1000Hz.
Nominal calibration level for the free field: 94.1dB
Nominal calibration level for the diffuse field: 94.0dB
•
Frequency for acoustic testing: 8000Hz.
•
Warm-up time:
≦
2min
•
Sampling interval: Bar graph indication
→
125 ms approx.
Numeric indication
→
1 sec approx.
•
Data record capacity: Data can be stored in the memory.
Max. 200M data can be stored (micro SD CARD 4GB).
Max. 255 blocks can be split.
•
Microphone equivalent electrical impedance (electrical input device):
Replace the microphone capsule with a series capacitance of 27pF +/- 3pF.
Display LCD
•
Display screens:
4 digit numerical indication of sound level, from 30.0 to 130.0dB with 0.1dB
resolution.
Bar-graph indication of current sound level with 1dB resolution.
Sound level range indicator: 30–90dB, 40–100dB, 50–110dB, 60–120dB or
70–130dB in five ranges.
Time display; year – month – day and hour: minute: second.
•
Display update rate: 1 second
•
Display first indication: Depends on the condition the instrument when it was last
turned off.
•
Warning indications:
Out-of-range indications:
OVER
displayed at upper limit of the range
UNDER
displayed at lower limit of the range
