Sper Scientific 840015 Sound Meter Type 1 - Manual (Page 7)

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8. SPECIFICATIONS
Display 18 mm (.0.7") LCD 3¼ digits
Function
dB ( A and C Frequency weighting), Time
weighting (Fast, Slow), Max. hold, AC Output
Measurement Range
30-70 dB, 60-100 dB, and 90-130 dB
40 dB on each step, with overload indicator
Resolution 0.1 dB
Accuracy (23 ± 5°)
Frequency weighting meets ANSI S1.43
calibration input signal on 94 dB 31.5 Hz ~ 8
kHz), then the accuracy of "A" weighting is
specified as:
31.5 Hz - ± 1.5 dB, 63 Hz - ± 1 dB
125 Hz - ± 1 dB, 250 Hz - ± 1 dB
500 Hz - ± 1 dB, 06 kHz - ± 1 dB
2 kHz - ± 1 dB, 4 kHz - ± 1 dB
8 kHz - + 1.5 dB to - 3 dB
12.5 kHz - + 3dB to - 6dB
16 kHz - + 3dB to - No Limit
Frequency 31.5 Hz to 16 kHz
Microphone
1/2" standard size electric condenser
microphone. Threaded microphone cap
unscrews for microphone replacement.
Time weighting
(Fast/Slow)
Fast (F): t = 125 ms
Slow (S): t = 1000 ms
Internal Calibration
Built-in internal calibration on front panel.
Calibrated via internal 94 dB/1kHz square wave
generator
Output Signal
AC 750 mVrms corresponding to each
range step
Output Terminal 3.5 mm diameter jack
Operating Environment. 0° ~ 50°C (32° ~ 122°F) and less than 80% RH
Power Supply
DC 9V battery x 2PCs, 0006P, MN1604 (PP3) or
equivalent, heavy duty or alkaline type
Power Consumption Approximately DC 17mA
Weight 1 lb (460g) with battery
Dimension 10½ x 3½ x 1½" (260 x 87 x 36 mm)
Optional Accessories
840091 Wind Screen Replacement
840092 Bench-Top Tripod
840093 Field Tripod
850016 Acoustical Calibrator