SP75 sound level meter SPECIFICATIONS ELECTRICAL Applicable Standard: IEC 651-1979 Type 2 ANSI S1.4-1983 Type 2 JIS C 1502 Measurement Range: Display: 3½ digit liquid crystal display (LCD) with maximum reading of 1999. Resolution: 0.1dB Measurement rate: once per second, nominal Frequency Weighting: A and C according to IEC 651 Type 2 Frequency Range: 31.5 Hz to 8000 Hz Detector: True-RMS with independent frequency weightings Dynamic Range: 55dB Maximum Hold decay time:<1dB/3minute with Reset switch Time Weighting: S(SLOW) and F(FAST) according to IEC 651 Type 2 Microphone: 1/2" electret (prepolarized) condenser microphone DC Output: Output - 10 mV/dB Output Impedance - 50Ω approx This compact sound level meter can be used one handed or it can be mounted on a tripod for measuring over large periods. AC Output: Output -1.0V RMS corresponding to the top of the selected measurement range. Output Impedance: 600Ω approx The Time Weighting can be set to slow (for normal use) or fast to check the average level of fluctuating noise. Similarly the Frequency Weighting can be A or C, with C suitable for low frequency noise. An AC/DC output allows capture of reading for later analysis (output is approx 10mV DC/dB). Low battery indication Operating Environment: -10°C to 50°C at < 90% relative humidity Storage Temperature: -20°C to 60°C, 0 to 80% R.H. with battery removed CE Mark: yes Battery: 4 pcs 1.5V (AAA size) UM-4 R03 Battery Life: 50 hours Dimensions: 217mm(H) x 44mm(W) x 40mm(D) Weight: 168g including batteries Accessories inc: Windscreen x1, Battery x4, Plug x1, Tripod mounting screw-nut x1, Protective carrying case x1 Due to policy of continuous development, Martindale Electric reserves the right to alter equipment specification and description outlined in this document without prior notice. No part of this document shall be deemed to be part of any contract for the equipment unless specifically referred to as an inclusion within such contract. © Martindale Electric Co. Ltd. 2004 Martindale Electric Company Ltd. Metrohm House, Penfold Trading Estate, Imperial Way, Watford, WD24 4YY. Tel: 01923 441717 Fax: 01923 446900 E-mail: [email protected] Web site: http://www.martindale-electric.co.uk