EN-2
2. FEATURES
The ISO-TECH SLM 52N Sound Level Meter complies with the requirements of
IEC 61672-1: 2002 standard for a Class 2 instrument.
The instrument contains several features which permit sound level measurements
under a variety of conditions.
Features include:
Ease of use.
Easy to read large display.
Five measurement ranges.
Fast and Slow time weightings.
A and C frequency weightings.
Both AC and DC signal outputs are available from a single standard 3.5mm
coaxial socket suitable for use with a frequency analyzer, level recorder, FFT
analyzer, graphic recorder, etc.
3. MEASUREMENT PARAMETERS
The following parameters are used on the instrument.
LA
→
“A” frequency weighting sound pressure level
LC
→
“C” frequency weighting sound pressure level
FAST
→
Fast time weighting
SLOW
→
Slow time weighting
max
→
Maximum time-weighted sound pressure level
The various settings depend on the condition the instrument was in before it was last
turned off.
4. SPECIFICATIONS
Specifications apply to Model SLM 52N fitted with Microphone model MC-21 and
Microphone Preamplifier model AP-21
Applicable standards:
IEC61672-1: 2002 Class 2
IEC60651: 1979 Type 2
ANSI S1.4: 1983 Type 2
