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Specification
SP79
Sound Level Meter
All specifi ed accuracies are at 23°C ± 5°C, <70% R.H. for 1 year.
Temperature coeffi cient: 0.1 x (specifi ed accuracy) per °C, (0°C to 18°C, 28°C
to 50°C).
Measuring level range: 32 – 130dB
Frequency range:
20Hz – 8kHz
Frequency weighting: A or C
Level ranges: Lo:
30 – 90dB
Med:
50 – 110dB
Hi:
70 – 130dB
Accuracy: ±1.4dB (at reference conditions)
Dynamic range: 60dB
Time weighting: Fast or slow
Microphone: ½ inch electret condenser microphone
AC output: 1 Vrms at full scale (full scale is the upper limit of the selected
level range)
DC output: 10mV/dB
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Martindale Electric Company Limited
Martindale Electric Co Ltd,
Metrohm House, Imperial Park, Imperial Way,
Watford, Hertfordshire, WD24 4PP, UK
Tel: +44 (0)1923 441717 Fax: +44 (0)1923 446900
E-mail:sales@martindale-electric.co.uk
Website: www.martindale-electric.co.uk
© 2016 Martindale Electric Company Ltd.
Registered in England No. 3387451. Rev1 LITSP79
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Specification
SP79
Sound Level Meter
GENERAL
Display:
Liquid crystal display
Digital, 4 digits, updates 2/sec
Bar-graph, 30 segments, updates 10/sec
Power: 1 x 9V, PP3 alkaline battery (IEC 6LR61, NEDA 1604A)
Continuous operating time: 60 hours typical (alkaline battery)
Auto power off: after approx. 30 minutes
Low battery indication: The
symbol is displayed
Dimensions: 258(L) x 55(W) x 25(D) mm
Weight: Approx. 185g including battery
Includes: 1 x 9V battery, windscreen, storage case, instructions
ENVIRONMENTAL
Operating conditions: Temperature: 0°C to 40°C
Relative humidity: 10 to 90% R.H.
Storage conditions:
Temperature: -10°C to 60°C
Relative humidity: 10 to 75% R.H.
FUNCTIONALITY
Complies with BS EN 61672-1 Class 2
EMC
Conforms to BS EN 61326-1
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