Conforms to ANSI S1.4-1983, ANSI S1.25-1978, and IEC 651-1979 Specifications
Choice of Exchange Rates (3, 4, or 5 dB) and Criterion Levels (70, 80, 84, 85, or 90 dB)
Selectable Threshold Level from 50-99 dB in 1 dB Increments
Dual Range (50-100 dB and 80-130 dB)
Real Time Clock With Rechargeable Battery
Security Lockout Feature With Internal Data Storage
Self-Test Modes Test Operational Readiness
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Power Requirements |
Ni-Cad Rechargeable battery pack |
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Warm-Up Time |
1 minute |
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Dimensions |
6.8" (H) x 3.1" (W) x 1.1" (D), (172x80x28mm) |
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Weight |
18 oz. (500g) including battery pack |
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Case Construction |
Anodized aluminum extrusion |
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Security Feature |
Locks-in operating function |
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Real Time Clock |
Clock continues running in all functions |
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Performance Capability |
Conforms to ANSI S1.4-1983 and IEC 651-1971 for sound level function and ANSI S1.25-1978 for dosimeter function and ANSI S1.25-1978 for dosimeter function |
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Sound Level Mode |
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Ranges |
50 to 100dB, 80 to 130dB |
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Accuracy |
True RMS, Type S2 |
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Dynamic Range |
Selectable from 50 to 100dB and 80 to 130dB |
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Frequency Response Weighting |
"A" Weighting |
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Response Time |
Slow (1 second) |
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Crest Factor |
10:1 at maximum indication |
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Frequency Range |
20Hz to 8KHz |
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Dosimeter Mode |
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Threshold Level |
Selectable from 50-99dB in 1dB increments |
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Criterion Level |
Selectable, 70, 80, 84, 85 or 90dB |
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Criterion Duration (TC) |
Eight (8) Hours |
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Exchange Rate |
Selectable 3, 4 or 5dB |
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Maximum Indication |
999.9% DOSE |
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Resolution |
0.1% DOSE to 999.9% |
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Elapsed Time |
Displays either Hours: Minutes or Minutes: Seconds, up to 99 Hours 59 Minutes, 59 Seconds. Timing Accuracy: 0.05% |
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140dB Peak |
Displays number of 140dB peaks that have been detected |
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Microphone |
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Type |
0.52" (13.2mm) Diameter Electret Condenser, Omnidirectional 70° angle of incidence. Maximum sound pressure level 148dB |
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Display |
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Numerical |
4 Digit LCD |
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Annunciators |
Lo Batt, Spl Max, Int 60, % Dose, dBA, plus a colon and decimal point |
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Environmental |
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Operating Temperature |
Operating Temperature: -10° to 50°C |
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Temperature Coefficient |
±0.05dB per °C (25° to 50°C) for reference mea-surement of 105dB at 1000Hz |
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Relative Humidity |
<0.5dB (0-95% RH) |
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Storage Range |
-30° to 45°C (without batteries) |
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Magnetic Field Influence |
No effect in field of 1 oersted (80A/m) |