Environmental: Martindale SP75 Sound Level Meter0 pages

SP75
sound level meter
SPECIFICATIONS
ELECTRICAL
Applicable Standard:

IEC 651-1979 Type 2
ANSI S1.4-1983 Type 2
JIS C 1502

Measurement Range:

Lo - range 35-90 dB
Hi - range 75-130 dB

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

Warm-up: <5s

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: sales@martindale-electric.co.uk Web site: http://www.martindale-electric.co.uk