AudioQuest M-27 Simplified Operating Instructions, Control Keys, RUN Pause Reset OFF, Code, HL3

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Events Monitor:

Accumulates the following data for up to 16 separate events: 3 separate integrated sound levels. 3 separate noise doses.

2 time weighted averages and a sound exposure level. Peak level, maximum level, start time, and run time.

The M-27 as an overall unit accumulates data for: 3 separate dosimeters.

3 separate 1 minute time histograms.

2 separate percent time statistical distributions.

2 separate percent dose distributions.

16 separate events.

Sound levels, peaks and maximum levels.

Run time, pause time, and elapsed or real time.

The unit displays:

Sound level, peak level, maximum level.

2 integrated average levels. An equivalent sound level.

3 percent doses.

2 time weighted averages. A sound exposure level. 16 separate events. Run time, pause time, and upper limit time (the time greater than preset level).

Fast or slow time constant.

Upper limits of 90, 115, or 140 dB.

12 or 24 hour clocks.

8 different unit numbers. Text, graph, or both printouts. Serial or parallel printers.

Baud rates of 300, 600, 1200, or 2400.

Line feed, carriage return, or both.

The above features, packaged in a compact, rugged, hand-size, easy-to-use instrument, make the QUEST M-27 Noise Logging Dosimeter the "Ultimate" dosimeter.

M-27 SIMPLIFIED OPERATING INSTRUCTIONS

When using the unit gently press key until light click is felt. Hold down until unit responds. Generally this will be immediately, unless the unit is calculating data such as sound level, in which case it may take up to a second.

Elapsed or real time clock (12 or 24 hour). Calibration level. Code of 24 internal switch settings. The unit prints out:

A heading.

Summary of accumulated data and setup parameters. Up to 16 separate events.

3 separate 1-, 3-, 5-, or 10-minute time histograms. 2 percent time statistical distributions.

2 percent dose statistical distributions.

Raw data for computer storage and manipulations.

Includes editing capability to print out only required data.

The M-27 internal switches select:

Exchange rates of 3, 4, 5, or 6 dB.

Criterion levels of 80, 84, 85, or 90 dB.

2 thresholds of none, 70, 75, 80, 85, or 90 dB.

2 ranges of 35-126 or 50-146 dB.

Control Keys

RUN

PAUSE

RESET

ON

OFF

Starts or continues accumulating data. Display shows run time. Also used to start Events.

Stops accumulation of data. Display counts down from

P-5 to P-l. If key is not released in 5 seconds, unit will

reset, and old data will be lost. Key is also used to reset Clock, Calibrator, Events, and pause the Printout.

If OFF, press to turn on. If ON, hold key down; display counts down from 0-5 to 0-1 and then blank. When off, data is retained. Key also turns off Print and Events.

NOTE

"A" or "C" frequency weighting.

Data is not lost when the unit is off. Data will be retained for the life of the battery. The only ways to erase data are to hold down PAUSE/RESET for 5 seconds or to remove the battery.

CODE

Cycles through 7 steps. Press the key for each step.

HL3

Allows the M-27 to display and print data 7 ways. Also

 

displays a code of internal switch settings.

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Contents Table of Contents Introduction FCC Compliance and Cautionary NoteCode RUN Pause Reset OFFSimplified Operating Instructions Control KeysTime Keys Procedure to Accumulate Event DataSound Level Meter Keys Dosimeter KeysSetting the Clock Using a PrinterRecording the Calibration Level Changing Printer Parameters SpecificationsDumping Raw Data HL3 PrintGeneral Weighting CharacteristicsGeneral Description Principles of OperationMicrocomputer Modes Where Testing and CalibrationBattery Test Battery ReplacementOperating Procedure As a Survey or Event Monitor As an Area MonitorEvents Effects of Operators PresenceUse with Windscreen Sample Printouts Connections to PrinterPage Page Editing Printout Memory MapMemory Location Data 03CO-1FFFPrinter Setup Extending Battery LifeDSR Internal Switches Switch Switch PositionsSetting Internal Switches Code Decoding Troubleshooting Interpreting ResultsUse of Lavg and TWA Estimating TWA from Lavg Accuracy of ReadingsHints and Good Practices Accessories Service Policy

M-27 specifications

AudioQuest M-27 is a standout speaker designed for audiophiles who demand high performance and exquisite sound quality. As part of AudioQuest's commitment to providing unparalleled audio experiences, the M-27 blends advanced technologies with premium materials to deliver exceptional musical clarity and accuracy.

One of the key features of the M-27 is its innovative driver design, which utilizes a new-generation ceramic cone. This cone is engineered to minimize distortion while enhancing transient response. The result is a speaker that offers a clear, detailed sound across a wide frequency range. The drivers are also matched with an advanced neodymium magnet system, ensuring efficient energy transfer and improved bass response.

The M-27 is equipped with a sophisticated crossover network that has been meticulously designed to maintain the integrity of the audio signal. By employing high-quality components, including precision resistors and capacitors, the crossover effectively divides the audio signal into specific frequency bands, allowing each driver to perform at its best. This attention to detail not only enhances sound quality but also helps to create a more cohesive listening experience.

Another notable characteristic of the M-27 is its sturdy and well-constructed cabinet. Built from high-density MDF, the cabinet is engineered to minimize resonance and vibration, which can color sound. Moreover, AudioQuest has incorporated internal bracing to further enhance structural integrity. The elegantly finished exterior not only adds to the speaker's aesthetic appeal but also serves to complement various home decors.

Connectivity is made simple with the M-27, thanks to its standard speaker terminals that accommodate a wide range of wire gauges. This flexibility allows audiophiles to use their preferred cables for optimal performance. Additionally, the speaker is designed to work seamlessly with a variety of amplifier configurations, making it an adaptable choice for different audio setups.

Incorporating these advanced technologies and design principles, the AudioQuest M-27 is not just a speaker; it's a gateway to an immersive listening experience. With its ability to reproduce sound with remarkable accuracy, it will appeal to discerning listeners looking to elevate their audio playback and enjoy their favorite music in a whole new light. Overall, the M-27 stands as a testament to AudioQuest's dedication to crafting high-quality audio products that meet the needs of serious music enthusiasts.
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