Page 34
Sound Level Meters – User Manual
Specifications
Microphone
Class 1 instruments: MK:224 or MK:229 pre-
polarized free-field 1/2” Condenser
Class 2 instruments: MK:216 pre-polarized free-
field 1/2” condenser
Microphone preamplifier
MV:200 removable preamplifier for Class 1 & Class
2 instruments
Measurement range
A single measurement range covering 120 dB
without any adjustment
Linear operating range
In accordance with IEC 61672:
A-weighted: 24 to 139 dB
C-weighted: 30 to 139 dB
Z-weighted: 45 to 139 dB
Self-generated noise
<19 dB(A) Class 1, <22 dB(A) Class 2
Frequency weightings
RMS: A, C, & Z measured simultaneously
Peak: A, C, & Z measured simultaneously
Time weightings
Fast, Slow & Impulse measured simultaneously
Display
High resolution display with ambient light sensor &
illuminated keypad
Display of
Measured parameters
Recalled measurement parameters (data logging
versions)
Battery level & external power connection
Overload & under-range
Time & frequency weighting
Elapsed measurement time
Instrument status
Resolution
Display: 0.1 dB (default), 0.01 dB option selectable
in NoiseTools
Storage: 0.01 dB
Memory
4 GB as standard (data logging versions)
32 GB factory fitted option
Time history
10 ms, 62.5 ms, 100 ms, 125 ms, 250 ms, 1/2 sec,
1 sec, 2 sec (user selectable)
Audit store
For each measurement, the following data is
stored into an independent, non-volatile memory
for use with the audit store function:
Summary of Contents for Optimus+
Page 1: ...Instrument Handbook Optimus GPS Sound Level Meters...
Page 22: ...Page 22 Optimus Sound Level Meters User Manual A pin identifies the measurement location...
Page 50: ......
Page 51: ......
Page 52: ......
Page 53: ...www cirrusresearch com sales cirrusresearch com...
