Cirrus CR151A Optimus yellow Class 1 Sound Level Meter (20~140 dB)

- Applicable Standards

IEC 61672-1:2013 Class 1

IEC 61672-1:2002 Class 1

IEC 60651:2001 Type 1 I

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

ANSI S1.25:1991

- Microphone: Class 1 MK:224/MK:229 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,

- 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)

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

- 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

- Displayed Functions: LXY, LXYMax, LXYMin, Measurement Run Time
- Stored functions: LxyMax & time history of LxyMax where x=A, C or Z y=F, S or I

Datasheet