Brüel & Kjær Hand-held Analyzer Types 2250 and 2270

Introduction

Types 2250 and 2270 are innovative hand-held analyzers with an easy, safe, and clever design philosophy based on extensive research. Type 2250 has won several awards for its excellent ergonomics and design.

Both analyzers can host a number of applications including frequency analysis, logging, FFT, building acoustics, and signal recording. Additionally, Type 2270 can simultaneously measure with two microphones, two accelerometers, or one of each. All application modules can be ordered as part of a fully preconfigured instrument or separately at any time, as the need arises.

The combination of application modules and innovative hardware makes these analyzers dedicated solutions for performing high-precision measurement tasks in environmental, occupational, and industrial application areas. Together with Measurement Partner Suite for post-processing, they provide a total solution for your measurement needs.

Uses and Features

Uses

• Class 1 sound measurements to latest international standards
• Environmental noise assessment and tone assessment (1/3-octave and FFT)
• Loudness and noise rating measurements
• Occupational noise evaluation
• Reverberation time measurements (see BP 2190)
• Building acoustics (see BP 2190)
• Product quality control (see BP 2183)
• Noise source identification using sound intensity (see BP 2341)
• Audiometer calibration
• Real-time analysis in 1/1- and 1/3-octave bands
• Analysis of logging profiles for broadband parameters and spectra
• Vibration criteria measurements
• Low-frequency building vibration according to ISO 8041:05 and DIN 45669-1:2010-09
• Whole-body and hand-arm human vibration measurements (RMS, MTVV and Crest Factor)
• Infrasound (G-weighting) measurements according to ISO 7196:1995 and ANSI S1.42 – 2001 (R2011)

Features

Hardware:

• 2-channel measurement capability with any combination of microphones and accelerometers
• Large, high-resolution, touch-sensitive colour screen
• Communication via USB, LAN and options for Wi-Fi or 4G communication
• Integral digital camera for documentation and reference
• Automatic detection of and correction for windscreen
• Robust and environmentally protected (IP44)

Software:

• Dynamic range in excess of 123 dB(A)
• 0.5 Hz - 20 kHz broadband linear range
• Personalized measurement, display and job setup
• 'Smiley' quality indicators with hints and warnings
• Timers for automatic start of measurement
• Measurement Partner Suite for comprehensive post-processing
• GPS coordinates stored with measurement data
• Simultaneous noise and weather data acquisition
• 24- or 16-bit recording during all or parts of measurement

Hardware and Applications

Introduction

Types 2250 and 2270 are flexible hand-held analyzers that cover all your sound and vibration measurement and analysis needs - from the traditional uses in assessing environmental and workplace noise to industrial quality control and development.

The high-resolution touchscreen allows you to easily navigate through the setup menu, tailoring one of the many predefined templates to precisely your measurement requirements. The large dynamic range copes with both the loudest noises and those just above the noise floor, and the frequency range, extended with the low-frequency option, spans from 20 kHz down to infrasound for measurement of noise sources suspected of emitting very low-frequency noise.

When on site, the weather station kit measures weather parameters that are stored on the analyzer together with the noise data. After completion, transfer your measurement data to Measurement Partner Suite, which has tools to help you extract exactly what you need from your data.

This product data describes different combinations of software modules (applications) available for Type 2250 and Type 2270. All analyzers are delivered with the Sound Level Meter Software BZ-7222 enabled. These modern Class 1 Sound Level Meters (SLMs) fulfill the requirements up to and including the latest standard, IEC 61672-1 (see the specifications section for compliance information), and are delivered with a number of predefined measurement templates tailored to suit specific requirements.

The Hand-held Analyzer Hardware

Great care has been taken to ensure that the hardware is ergonomically optimal in field use. Both Type 2250 and Type 2270 use the same award-winning design. The key features are shown in Fig. 1.

Alerting the Operator

Email or SMS/text messages can be sent to a PC or mobile device to inform operators instantly of noise events that require a response, battery power levels that require attention, memory storage status, calibration status, and many other user-programmed trigger conditions. This is a very low-cost solution for receiving important alerts.

Standard Applications

The following applications are included with every new Type 2250 and Type 2270 analyzer:

• Sound Level Meter Software BZ-7222 - standard sound level meter software according to IEC 61672-1/ANSI
• Frequency Analysis Software BZ-7223 – analyse, in real-time, the 1/1- and 1/3-octave filter bands with a dynamic range in excess of 135 dB, from the noise floor to 140 dB, the maximum measurable level
• 2-channel Option BZ-7229 (Type 2270 only) – realize the full potential of your analyzer with 2-channel functionality for SLM, Frequency Analysis, Logging, Enhanced Logging, and Building Acoustics software
• Tone Assessment Option BZ-7231 – when used in conjunction with the FFT Analysis Software, this software provides an objective in-field assessment of tonal noise components

Connectivity

Fig. 2 Connectivity

Remote Internet Communication

Access your data from anywhere by using various technologies. Type 2250/2270 can operate via Wi-Fi, modem communication (for example, 3G) or LAN (Ethernet).

Secure access to measurement data from anywhere

Diagram showing a 2250/2270 Hand-held Analyzer connected to a PC via USB and the internet, with Measurement Partner Suite software.

Post-processing Software

Fig. 3 Measurement Partner Suite BZ-5503

BZ-5503 Measurement Partner Suite, in its basic configuration, comes with your hand-held analyzer (see product data BP 2430). It is the Brüel & Kjær data viewing and post-processing toolbox for environmental noise and vibration analysis.

The free, basic configuration provides data archive, preview, and export capabilities, software maintenance, and online display. Archives can be stored locally or on network drives.

Advanced post-processing functionality is available with a Measurement Partner Suite post-processing module license. A range of subscription or capex license options are available, locked to either your instrument's serial number or a USB dongle, giving you the flexibility to choose the license model that meets the needs of your business.

2-channel Measurement Option - BZ-7229

2-channel Option BZ-7229 adds an extra measurement channel to Hand-held Analyzer Type 2270 and is a standard application included on all new Type 2270 analyzers. The two channels accept inputs from the same type of transducer (for example, two microphones) or different transducers (for example, one microphone and one accelerometer).

2-channel functionality is available for the following modules: Sound Level Meter Software BZ-7222, Frequency Analysis Software BZ-7223, Logging BZ-7224, Enhanced Logging BZ-7225, and Building Acoustics Software BZ-7228. BZ-7229 is compatible with Signal Recording Option BZ-7226 and Low Frequency Option BZ-7234.

Sound Level Meter Software - BZ-7222

All Hand-held Analyzer Types 2250 and 2270 come with the Sound Level Meter Software enabled. This makes your analyzer a versatile broadband SLM. If you connect an accelerometer to the rear socket, it also functions as a Vibration Meter that can display parameters as engineering units or logarithmically in dB. The software complies with the latest international standard (IEC 61672-1) as well as national standards. For a complete list of measured parameters, see "Specifications".

Fig. 4 Sound Level Meter Software displays with a sound measurement (left) and a vibration measurement (right) with an accelerometer, including the icons for added annotations, visible in the upper right corner

Frequency Analysis Software – BZ-7223

This application enables real-time measurements in 1/1- and 1/3-octave bands, adding frequency information to your data, making it easy to collect spectra, whatever the task.

Each 1/1- or 1/3-octave band has a dynamic range in excess of 135 dB, from the noise floor to 140 dB, the maximum measurable level.

The available ranges are centre frequencies 8 Hz to 16 kHz (1/1-octave) and centre frequencies 6.3 Hz to 20 kHz (1/3-octave). The low-frequency option extends the ranges to 1 and 0.8 Hz, respectively.

Spectra can be A-, B-, C-, G- or Z-weighted. Five spectra and full spectral statistics are measured and stored. In addition, seven different LN spectra and instantaneous values are available for display. Two spectra (for example, a minimum and maximum spectrum) can be superimposed on the display. All the broadband quantities measured by Sound Level Meter Software BZ-7222 are computed in parallel with the analysis. Spectral analyses can be documented using notes and voice annotations.

For a measured spectrum, single-number parameters, such as Noise Rating, Speech Interference Level, and Loudness, can be calculated and displayed for noise impact analysis and limit comparison. A programmable generator is available for measurements requiring a sound source. You can select white or pink noise and set the upper and lower limits.

2-channel Measurements with BZ-7222

Type 2270 users can measure two channels of broadband values with any combination of transducers: two microphones, two accelerometers, or one microphone and one accelerometer.

2-channel Measurements with BZ-7223

Type 2270 users can measure two spectra simultaneously with any combination of transducers. If the transducers are one microphone and one accelerometer, two independently scalable y-axes are available. Simple difference calculations are available between channels when transducer type and weightings are compatible.

Fig. 5 Sound level meter software display showing 2-channel measurement. Channel 1 is noise, channel 2 is vibration in engineering units

Fig. 6 Frequency Analysis Software BZ-7223 displays: (Left) 1/3-octave showing dual spectra and generator icon, cursor readouts, loudness and noise rating (NR) results. (Right) The decisive band and the corresponding NR curve is shown

Fig. 7 2-channel Frequency Analyzer display

Enhanced Logging Software - BZ-7225

With logging software enabled, your analyzer becomes a versatile instrument for obtaining time histories (logging profiles). Logging software allows you to select any of the available broadband parameters and log them at intervals from 1 s to 24 h. Additionally, LAeq and/or LAF can be simultaneously logged at 100 ms intervals.

With Frequency Analysis Software BZ-7223, the logging software also lets you log spectra the same as your broadband values at intervals from 1 s to 24 h.

Enhanced Logging Software BZ-7225 incorporates a number of features designed to make difficult field work as manageable as possible:

• Five user-definable markers can be set while you measure. Use these to annotate specific noise or vibration sources.
• Markers can be set in the field using the stylus and the touch screen. Simply 'tap and drag' on the part of the profile you want to mark and select a marker from the drop-down list.
• Markers can even be set after the noise event has passed. The display covers the latest 100 samples (100 s of profile when logging at 1 s intervals, otherwise more), so in most cases, you can wait for the event (or disturbance) to end before placing your marker. Alternatively, scroll back in the profile, freeze the display, and set your marker.
• Voice annotations, using the commentary microphone, are attached to the exact point on the profile where the annotation is made.
• All markers and annotations are saved with the measurement and are imported into Measurement Partner Suite BZ-5503 where they are directly accessible in the profile.

Logging data are stored directly on SD cards and can be directly read from the SD card by Measurement Partner Suite. Large amounts of data can be quickly transferred directly from the analyzer using the USB cable or using a standard card reader. SDHC memory cards complying with the new SD 2.0 standard offer up to 32 GB of removable data storage. This enables very long signal recordings and measurement profiles to be made.

For example, a project where all broadband parameters, one 100 ms parameter, all 1/3-octave spectra, and full statistics are measured with a logging period of 1 s for a total duration of 24 h will use 88 Mb.

The enhanced logging templates equip your analyzer for extended logging periods, allowing you to measure continuously, saving data to SD memory cards or USB devices.

Additional functionality includes:

• Measure continuously, saving data to SD memory cards or USB devices
• Reboot automatically and resume operation in case of power failure
• Save data in manageable portions (every 24 hr), selectable for download
• Make periodic reports; that is, calculate measurement parameters at preset intervals (report periods)
• Measure Ldn, Lden, Lday, Levening, and Lnight

A periodic report is similar to the Measurement Total of the Logging software, except it is made periodically. For example, you may need to know Laeq values at 1 h intervals during an extended logging period. The Enhanced Logging software will do this for you.

Combining periodic reports with level-triggered event markers and Signal Recording Option BZ-7226 provides an overview as well as a focus on essential details.

A typical setup for 24 hours of extended logging might be:

• Continuous measurement
• Hourly periodic reports
• Level triggered marker for events above LAF = 60 dB(A)
• Signal Recording of events (please refer to the Signal Recording Option BZ-7226)
• Logging of other parameters as required

Fig. 8 Single-channel logging display showing a LAeq profile with marker functionality on the analyzer

Signal Recording Option – BZ-7226

Signal Recording Option BZ-7226 works with all applications and enables you to make recordings of the actual measured signal with the microphone used for acoustic measurements (that is, not the commentary microphone) or accelerometer used for vibration measurements. Signal recordings are automatically transferred with the data to Measurement Partner Suite and can be helpful in identifying noise sources during post-processing.

Another important use of signal recording is to record signals for later processing. This could be in industrial applications - analysing an engine run-up or a machinery process cycle - or in environmental applications - recording noise for later post-processing in Measurement Partner Suite. With the post-processing module license for Measurement Partner Suite, you can perform an FFT-based pure tone assessment on .wav files.

In addition to manual and automatic signal recording, Logging Software BZ-7224 and Enhanced Logging Software BZ-7225 can trigger signal recording based on level exceedance, meaning that recordings can be automatically initiated when no operator is present.

The Signal Recording Option offers a choice of 24- or 16-bit recording with post-processing supported in Measurement Partner. You can use 24-bit recording to capture the full 120 dB dynamic range of Type 2250/2270, which is convenient for later signal analysis. You can use 16-bit recording to consume less memory; however, this requires selecting the level range for recording (or using the automatic gain control).

Tone Assessment Option – BZ-7231

Noise can be described as tonal if it contains a noticeable or discrete, continuous note. This can include noises such as hums, hisses, screeches, drones, etc. Any such subjective description is open to discussion and contradiction when reported.

ISO 1996-2 (2007) Annex C, Objective method for assessing the audibility of tones in noise-reference method, provides measurement procedures to be used to verify the audibility of tones and to quantify them. Measurement results can therefore be compounded and help explain subjective reactions.

Automatically Configured for ISO 1996 Assessments

Tone Assessment Option BZ-7231 offers a quick and easy 'in-the-field' objective assessment of tonal noise components, in compliance with ISO 1996 assessments and is a standard application on all new analyzers. The facility to carry out the ISO standard tone assessment offers objective feedback about whether you have 'found the problem' or need to take further measurements. In addition, the analyzer offers an easy way of setting up the analysis to follow the ISO 1996-2 standard. When this option is selected, simply press Start and the analyzer automatically selects the appropriate measurement configuration, and the measurement and analysis are in progress.

Fig. 10 Performing an outdoor tone assessment measurement

Fig. 11 FREQUENCY ANALYZER* Tone Assessment Option BZ-7231 showing 1/3-octave bands with audible tones higher than a set limit (tones are identified by the blue dots)

Fig. 12 Typical FFT spectrum display for the Tone Assessment Option, showing the various fields and parameters

Enhanced Vibration and Low Frequency Option – BZ-7234

Enhanced Vibration and Low Frequency Option BZ-7234 enables vibration and low-frequency sound functionality in Sound Level Meter Software BZ-7222, Frequency Analysis Software BZ-7223, Logging Software BZ-7224, and Enhanced Logging Software BZ-7225.

With the low-frequency sound option enabled and the appropriate transducer selection, infrasound (including G-weighting) measurements can be performed according to the most important international standards. For infrasound measurements, use low-frequency Microphone Type 4193 or Infrasound Microphone Type 4964 optionally with the Low-frequency Adapter UC-0211.

Fig. 13 Low Frequency Option showing G-weighted parameters LGF and LGeq

Adding Weather Parameters to Your Measurement Data

Weather conditions affect the propagation of sound, so wind speed and direction must be taken into account when measuring noise outdoors. Consequently, most environmental noise measurement standards define limits for wind speed and direction. To identify the portions of your measurement that are within allowable limits for wind speed and direction, use Weather Station Kit MM-0316-A (two parameters) or MM-0256-A (six parameters).

Fig. 14 Hand-held analyzer measuring outdoor noise using a weather station kit

The weather stations are based on ultrasound technology and operate well above the upper frequency limit of the microphone. Connect your weather station to your analyzer, turn it on, and you are ready to start measuring with no software setup necessary. The weather station is powered by the analyzer's battery, so there is no need for extra batteries.

Fig. 15 Weather Station Kit MM-0316-A

Post-processing of Weather Data

Noise and weather parameters are captured simultaneously on the analyzer and are available for display and post-processing in Measurement Partner Suite BZ-5503 along with your noise data when you are back in the office. To quickly identify the portions of your logging profile where wind speed and direction are within the allowed limits, use Measurement Partner's report and marker wizard (requires a post-processing module license for Measurement Partner Suite).

Outdoor Protection

For outdoor environmental noise measurements, your analyzer may need extra weather protection, offered by All-weather Case Type 3535-A and Outdoor Microphone Type 4952. For details, please refer to product data BP 2251 and product data BP 2099 respectively.

Overview of Software Features

The table below presents a summary of the main features of each of the basic application modules available with Type 2250 and Type 2270. See "Specifications” for more details.

* If Signal Recording Option is enabled

‡ If Tone Assessment Option is enabled

+ If Low Frequency Option is enabled

** If Frequency Analysis Software is enabled

Compliance with Environmental Standards

The CE marking is the manufacturer's declaration that the product meets the requirements of the applicable EU directives.

RCM mark indicates compliance with applicable ACMA technical standards - that is, for telecommunications, radio communications, EMC and EME.

China RoHS mark indicates compliance with administrative measures on the control of pollution caused by electronic information products according to the Ministry of Information Industries of the People's Republic of China.

WEEE mark indicates compliance with the EU WEEE Directive.

Safety

EN/IEC 61010-1, ANSI/UL 61010-1 and CSA C22.2 No.1010.1: Safety requirements for electrical equipment for measurement, control and laboratory use.

EMC Emission

EN/IEC 61000-6-3: Generic emission standard for residential, commercial and light industrial environments.

CISPR 22: Radio disturbance characteristics of information technology equipment. Class B Limits.

EN/IEC 61326: Electrical equipment for measurement, control and laboratory use EMC requirements.

IEC 61672-1, IEC 61260, IEC 60651 and IEC 60804: Instrumentation standards.

Note: The above is only guaranteed using accessories listed in this document.

EMC Immunity

EN/IEC 61000-6-2: Generic standard - Immunity for industrial environments.

EN/IEC 61326: Electrical equipment for measurement, control and laboratory use EMC requirements.

IEC 61672-1, IEC 61260, IEC 60651 and IEC 60804: Instrumentation standards.

Note: The above is only guaranteed using accessories listed in this document.

Temperature

IEC 60068-2-1 & IEC 60068-2-2: Environmental Testing.

Cold and Dry Heat

Operating Temperature: -10 to +50 °C (14 to 122 °F)

Storage Temperature: -25 to +70 °C (-13 to 158 °F)

Humidity

IEC 60068-2-78: Damp Heat: 93% RH (non-condensing at +40 °C (104°F)). Recovery time 2 ~ 4 hours.

Mechanical

Non-operating:

• IEC 60068-2-6: Vibration: 0.3 mm, 20 m/s², 10 – 500 Hz
• IEC 60068-2-27: Bump: 1000 bumps at 400 m/s²
• IEC 60068-2-27: Shock: 1000 m/s², 6 directions

Enclosure

IEC 60529 (1989): Protection provided by enclosures: IP 44*

*With preamplifier, extension cable or protection plug connected to the top socket and the hinged cover protecting the bottom connectors.

ADDITIONAL STANDARDS FOR MICRO USB WIRELESS ADAPTOR UL-1050*

* From the D-Link Corporation declaration of conformance for Wireless N 150 Micro USB Adaptor DWA-121.

Specifications – Hand-held Analyzer Type 2250/2270 Platform

Specifications apply to Type 2250/2270 fitted with Microphone Type 4189 and Microphone Preamplifier ZC-0032.

Transducer

SUPPLIED TRANSDUCER

One of the Following Microphones:

• Type 4189: Prepolarized Free-field 1½" Microphone
• Type 4190: Free-field 1½" Microphone
• Type 4966: Free-field 1½" Microphone

Nominal Open-circuit Sensitivity: 50 mV/Pa (corresponding to –26 dB re 1 V/Pa) ±1.5 dB

Capacitance: 14 pF (at 250 Hz)

SUPPLIED MICROPHONE PREAMPLIFIER

Part No.: ZC-0032

Nominal Preamplifier Attenuation: 0.25 dB

Connector: 10-pin LEMO

Extension Cables

Up to 100 m in length between the microphone preamplifier and Type 2250/2270, without degradation of the specifications.

Accessory Detection

Windscreen UA-1650 can be automatically detected when fitted over ZC-0032.

MICROPHONE POLARIZATION VOLTAGE

Selectable between 0 V and 200 V.

SELF-GENERATED NOISE LEVEL

Typical values at 23 °C for nominal microphone open-circuit sensitivity:

Hardware Interface

PUSHBUTTONS

11 buttons with backlight, optimized for measurement control and screen navigation.

ON-OFF BUTTON

Function: Press 1 s to turn on; press 1 s to enter standby; press for more than 5 s to switch off.

STATUS INDICATORS

LEDs: Red, yellow and green.

DISPLAY

Type: Transflective back-lit colour touchscreen 240 x 320 dot matrix.

Colour Schemes: Five different - optimized for different usage scenarios (day, night, etc.).

Backlight: Adjustable level and time.

USER INTERFACE

Measurement Control: Using pushbuttons.

Set-up and Display of Results: Using stylus on touchscreen or pushbuttons.

Lock: Pushbuttons and touchscreen can be locked and unlocked.

USB INTERFACE

USB 2.0 OTG Micro AB and USB 2.0 Standard A sockets for Wireless USB-A Adapter UL-1050, printer or weather station.

MODEM INTERFACE

Connection to Internet through GPRS/EDGE/HSPA modem connected through the USB Standard A Socket.

Supports DynDNS for automatic update of IP address of host name.

PRINTER INTERFACE

PCL printers, Mobile Pro Spectrum thermal printer or Seiko DPU S245/S445 thermal printers can be connected to USB socket.

MICROPHONE FOR COMMENTARY

Microphone, which utilizes automatic gain control (AGC), is incorporated in the underside of the analyzer. Used to create voice annotations for attaching to measurements.

CAMERA (TYPE 2270 ONLY)

Camera with fixed focus and automatic exposure is incorporated in the underside of the analyzer.

Used to create image annotations for attaching to measurements.

Image Size: 2048 x 1536 pixels.

Viewfinder Size: 212 x 160 pixels.

Format: jpg with exif information.

SECURE DIGITAL SOCKET

2 x SD sockets.

Connect SD and SDHC memory cards.

LAN INTERFACE SOCKET

Connector: RJ45 Auto-MDIX.

Speed: 100 Mbps.

Protocol: TCP/IP.

INPUT SOCKET

One socket with Type 2250; two with Type 2270.

Connector: Triaxial LEMO.

Input Impedance: ≥1 MΩ.

Direct Input: Max. input voltage: ±14.14 Vpeak.

CCLD Input: Max. input voltage: ±7.07 Vpeak.

CCLD Current/voltage: 4 mA/25 V.

TRIGGER SOCKET

Connector: Triaxial LEMO.

Max. Input Voltage: ±20 Vpeak.

Input Impedance: >47 kΩ.

Precision: ±0.1 V.

OUTPUT SOCKET

Connector: Triaxial LEMO.

Max. Peak Output Level: ±4.46 V.

Output Impedance: 50 Ω.

HEADPHONE SOCKET

Connector: 3.5 mm Minijack stereo socket.

Max. Peak Output Level: ±1.4 V.

Output Impedance: 32 Ω in each channel.

Storage

INTERNAL FLASH-RAM (NON-VOLATILE)

512 MB for user set-ups and measurement data.

EXTERNAL MEMORY CARD

SD and SDHC Card: For store/recall of measurement data.

USB MEMORY STICK

For store/recall of measurement data.

Power

EXTERNAL DC POWER SUPPLY REQUIREMENTS

Used to charge the battery pack in the analyzer.

Voltage: 8-24 V DC, ripple voltage <20 mV.

Current Requirement: min. 1.5 A.

Power Consumption: <2.5 W, without battery charging, <10 W when charging.

Cable Connector: LEMO Type FFA.00, positive at centre pin.

EXTERNAL AC MAIN SUPPLY ADAPTOR

Part No.: ZG-0426.

Supply Voltage: 100-120/200 – 240 V AC; 47 - 63 Hz.

Connector: 2-pin IEC 320.

BATTERY PACK

Rechargeable Li-Ion battery.

Part No.: QB-0061.

Voltage: 3.7 V.

Nominal Capacity: 5500 mAh (typical); 5200 mAh (minimum).

Typical Operating Time:

• Single-channel: >11 h (screen backlight dimmed); >10 h (full screen backlight).
• Dual-channel: >10 h (full screen backlight).

Use of external interfaces (LAN, USB, Wi-Fi) will decrease battery operating time. Connecting a weather station or a GPS receiver can decrease battery operating time by up to 20%. Connecting Wireless USB-A Adapter UL-1050 can decrease battery operating time up to 35%.

Battery Cycle Life: > 500 complete charge/discharge cycles.

Battery Aging: Approximately 20% loss in capacity per year.

Battery Indicator: Remaining battery capacity and expected working time may be read out in % and in time.

Battery Fuel Gauge: The battery is equipped with a built-in fuel gauge, which continuously measures and stores the actual battery capacity in the battery unit.

Charge Time: In analyzer, typically 10 hours from empty at ambient temperatures below 30 °C (86 °F). To protect the battery, charging will be terminated completely at ambient temperatures above 40 °C (104 °F). At 30 to 40 °C, charging time will be prolonged. With External Charger ZG-0444 (optional accessory), typically 5 hours.

Note: It is not recommended to charge the battery at temperatures below 0 °C (32 °F) or over 50 °C (122 °F). Doing this will reduce battery lifetime.

CLOCK

Back-up battery powered clock. Drift <0.45 s per 24-hour period.

Environmental

WARM-UP TIME

From Power Off: <2 min.

From Standby: <10 s for prepolarized microphones.

WEIGHT AND DIMENSIONS

650 g (23 oz) including rechargeable battery.

300 x 93 x 50 mm (11.8 x 3.7 x 1.9") including preamplifier and microphone.

Wireless Connection to Mobile Device

Specifications apply to Wireless USB-A Adapter UL-1050

Operating Frequency: 2.4 GHz.

Data Rate:

• IEEE 802.11n: up to 150 Mbps.
• IEEE 802.11g: up to 54 Mbps.
• IEEE 802.11b: up to 11 Mbps.

Encryption/Authentication:

Ordering Information

MISCELLANEOUS