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The data storage feature allows you to view reports on the computer or print them for use later during inspections. Use the 897 to take measurements, or to view and print reports using a PC computer or printer. Reports are automatically printed on a compatible PC printer for later use during OSHA or other official inspections. Recorded data can also be viewed on a personal computer monitor by using an accessory cable and other manufacturer's software.
The 897 computes dosage and records up to 31 hours, at one minute intervals, of Lavg and Lmax readings and the number of detected 140 dB peak occurrences per minute.
GENERAL | |
Power Requirements | Ni-Cad Rechargeable battery pack |
Warm-Up Time | 1 minute |
Dimensions | 6.8" (H) x 3.1" (W) x 1.1" (D), (172x80x28mm) |
Weight | 18 oz. (500g) including battery pack |
Case Construction | Anodized aluminum extrusion |
Security Feature | Locks-in operating function |
Real Time Clock | Clock continues running in all functions |
Performance Capability | Conforms to ANSI S1.4-1983 and IEC 651-1971 for sound level function and ANSI S1.25-1978 for dosimeter function |
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SOUND LEVEL MODE | |
Ranges | 50 to 100dB, 80 to 130 dB |
Accuracy | True RMS, Type S2 |
Dynamic Range | Selectable from 50 to 100dB and 80 to 130dB |
Frequency Response Weighting | "A" Weighting |
Response Time | Slow (1 second) |
Crest Factor | 10:1 at maximum indication |
Frequency Range | 31.5Hz to 8KHz |
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DOSIMETER MODE | |
Threshold Level | Selectable from 50-99dB in 1dB increments |
Criterion Level | Selectable, 70, 80, 84, 85 or 90dB |
Criterion Duration (TC) | Eight (8) Hours |
Exchange Rate | Selectable 3, 4 or 5dB |
Maximum Indication | 999.9% DOSE |
Resolution | 0.1% DOSE to 999.9% |
Elapsed Time | Displays either Hours: Minutes: Seconds, up to 99 Hours 59 Minutes, 59 Seconds. Timing Accuracy: 0.05% |
140dB Peak | Displays number of 140dB peaks that have been detected |
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MICROPHONE | |
Type | 0.52" (13.2mm) Diameter Electret Condenser, Omnidirectional 70° angle of incidence. Maximum sound pressure level 148dB. |
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DISPLAY | |
Numerical | 4 Digit LCD |
Annunciators | Lo Batt, Spl Max, Int 60, % Dose, dBA, plus a colon and decimal point |
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ENVIRONMENTAL | |
Operating Temperature | -10° to 50°C |
Temperature Coefficient | ±0.05dB per °C (25° to 50°C) for reference measurement of 105dB at 1000Hz |
Relative Humidity | Range: 0-95% RH Influence: Less than 0.5db over measurement range |
Storage Range | -30° to 45°C (Limitation of battery) |
Magnetic Field Influence | No effect in of 1 oersted (80A/m) |
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