Extech Instruments 407355 Bedienungsanleitung PDF herunterladen (Seite 3)

407355 Version 2.4 9/07 3

Specifications

Display Multi-function LCD

Units of measure dBA (‘A’ weighted decibels) for sound level

% DOSE for accumulated noise exposure

Measurement ranges 70 to 140dBA for sound level (SPL) measurements

0.01 to 9999 %DOSE for noise exposure surveys

Standards applied ANSI S1.25-1991 A-weighting; ISO-1999; BS 6402: 1983

Criterion level 80, 84, 85, and 90dB (selectable)

Threshold level 70 to 90dB in 1dB steps (selectable)

Exchange rate 3, 4, 5, and 6dB (selectable)

High level detector appears on LCD when measurement exceeds 115dBA

Peak flag PK appears on LCD when measurement exceeds 140dBA

Accuracy ±1.5dB

Frequency weighting ‘A’ weighting

Frequency response 31.5Hz to 8 kHz

Response time F (FAST) and S (SLOW) selectable

Datalogging capacity 8800 sets

Operating Temperature 32 to 122

F (0 to 50

Operating Humidity 10 to 90% RH

Storage Temperature 14 to 140

F (-10 to 60

Storage Humidity 10 to 75% RH

Battery power Four (4) 1.5V ‘AAA’ batteries

Battery life 40 hours (approx.)

Dimensions 4.2 (L) x 2.4 (W) x 1.3 (H)"

106 (L) x 60 (W) x 34 (H) mm

Weight Approx. 12.3 oz. (350g) with batteries

Descriptions

Display Description

1. FAST Response Time mode

2. SLOW Response Time mode

3. Noise Exposure test active

4. Memory mode alert

5. Noise Exposure test paused

6. Unit of measure for Noise Exposure test

7. Battery Status Indicator

8. Event memory banks (E1-E5)

9. 115dB limit (headphone) indicator

10. Numerical display digits

11. Unit of measure for sound level readings

12. 140dB PEAK indicator

13. Elapsed time mode for noise exposure tests

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