Cirrus CR152B Optimus yellow Class 2 Sound Level Meter (20~140 dB, Class 2, Data Logging)

- Applicable Standards

IEC 61672-1:2013 Class 2

IEC 61672-1:2002 Class 2

IEC 60651:2001 Type 2 I 

ANSI S1.4 -1983 (R2006), ANSI S1.43 - 1997 (R2007)

ANSI S1.25:1991

- Microphone: Class 2 MK:216 pre-polarized

- Microphone Preamplifier: MV:200 Removable Preamplifier (All versions)

- Total Measurement Range: 

20dB to 140dB RMS Single Range

Noise Floor: <18dB(A) Class 1, <21dB(A) Class 2

- Frequency Weightings: RMS: A, C, & Z Measured Simultaneously

- Time Weightings: Fast, Slow & Impulse Measured Simultaneously

- Display: High resolution display. Ambient light sensor & illuminated keypad

- Memory: 4GB (B Version), 32GB factory fit option

- AuditStore: Measurement verification data stored in secure memory

- Time History Data Rates (Global settings): 10ms, 62.5ms, 125ms, 250ms, 1/2 sec, 1 sec, 2 sec (User selectable)

- VoiceTag Audio Recording (B Version): Up to 30 seconds of audio notes with each measurement

- Measurement control: Pause & Back Erase with user selectable duration

- Dimensions

Size: 283mm x 65mm x 30mm

Weight: 300gms/10oz

- Batteries: 4 x AA Alkaline

- Battery life

Typically 12 hours with Alkaline AA

Typically 20 hours with Lithium AA Non-Rechargeable

Battery life is dependent upon the battery type, quality & screen brightness

- Connections

USB Type B to PC

AC & DC Output via ZL:174 (2 x Phono, 1m)

Multi-pin IO for external power via ZL:171 cable (2.1mm socket)

External Power: 5v-15v via MultiIO socket via ZL:171 cable (2.1mm socket)

- Tripod Mount: 1/4" Whitworth socket

- Case: Material: High Impact ABS-PC with soft touch back & keypad

- Environmental

Temperature: Operating -10°C to +50°C, Storage -20°C to +60°C

Humidity: Up to 95% RH Non Condensing

-  Measurement Functions

Displayed Functions

LXY, LXYMax, LXYMin

Measurement Run Time

Stored Functions

LXYMax & Time History of LXYMax

Time & Date of Measurement Start

where x=A ,C ,Z; y= F, S, I

Other functions may calculated by the NoiseTools software and displayed on download.