Cirrus research CR1720 Optimus green Class 2 Sound Level Meter (20~140 dB, Class 2, Data Logging, 3G/GPRS)

- Applicable Standards:

IEC 61672-1:2013 Class 2

IEC 61672-1:2002 Class 2

IEC 60651:2001 Type 2 I

IEC 60804:2000 Type 2

IEC 61252:1993 Personal Sound Exposure Meters

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

ANSI S1.25:1991

- Type Approvals for Class 1 Instruments:

LNE-25387-1 IEC 61672-1:2013

NF EN 61672-1:2014

IEC 61260:1996

NF EN 61260:1996

LNE-25387-0

EN 61672-1:2003

PTB-1.53-4052960 DIN EN 61672-1:2003-10

DIN EN 61672-2:2004-08

DIN 45657:2005-03

Applus+ 02-001-B-62/13-R

UNE-EN 61672-1:2005

- 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: <21dB(A) Class 2

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

- Additional Metrics: LAeq LF (20Hz to 200Hz) & Leq LF (20Hz to 200Hz)

- Time Weightings: Fast, Slow & Impulse Measured Simultaneously

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

- Memory: 4GB with 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: Up to 30 seconds of audio notes with each measurement

- Acoustic Fingerprint Audio Recording:

Off, Manual, Threshold Triggered, Advanced Trigger

User options:

Studio Quality - 96kHz/32bit WAV format

Standard quality - 16kHz/16bit WAV format

Pre-Trigger function

- Integrators:

Three simultaneous "virtual" noise meters. Integrator 1 is preset to Q3 for Leq functions. Integrators 2 & 3 can be configured with the following:

Exchange Rate: 3, 4 or 5 dB

Threshold: 70dB to 120dB (1 dB steps)

Time Weighting: None or Slow

Criterion Level: 70dB to 120dB (1 dB steps)

Criterion Time: 1 to 12 hours in 1 hour steps

- Integrator Quick settings:

EU, OSHA HC & OSHA NC, OSHA HC & ACGIH, MSHA HC & MSHA EC, Custom 1 & Custom 2

- Ln Statistical Values:

14 independent statistical Ln values calculated from 1/16th LAF

7 preset to L1.0, L5.0, L10.0, L50.0, L90.0, L95.0 & L99.0

- Measurement control:

Measurement control with user selectable duration of manual, 1 min, 5 min, 10 min, 15 min,30 mins, 1 hour, Lden

Automatic Synchronisation & Repeat

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, LXeq, LCPeak, LAPeak, LZPeak, LCeq-LAeq, LXE, LAIeq

Graph of Short LAeq, LCPeak

Integrators 2 & 3: TWA, Dose%, Est Dose%

Measurement Run Time

Integrators 2 & 3: TWA, Dose%, Est Dose%

14 Statistical Ln values

-Stored Functions:

LXYMax & Time History of LXYMax

LAeq, LCeq, LZeq, LCPeak, LZPeak, LAPeak, LAIeq

Time History of LAeq, LCeq, LZeq, LCPeak, LZPeak, LAPeak, LAIeq

Integrators 2 & 3: LAVG , TWA. %Dose

Time History of LAVG

Ln Values: 14 independent statistical values

Audio recording during measurement

Datasheet