AudioQuest M-27 User Manual
Events Monitor:
Accumulates the following data for up to 16 separate events: 3 separate integrated sound levels. 3
separate noise doses.
separate noise doses.
2 time weighted averages and a sound exposure level. Peak level, maximum level, start time, and
run time.
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.
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.
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).
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.
"A" or "C" frequency weighting.
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.
"A" or "C" frequency weighting.
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.
may take up to a second.
Control Keys
RUN
RUN
Starts or continues accumulating data. Display shows
run time. Also used to start Events.
PAUSE
Stops accumulation of data. Display counts down from
RESET 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.
pause the Printout.
ON If OFF, press to turn on. If ON, hold key down; display
OFF counts down from 0-5 to 0-1 and then blank. When
off, data is retained. Key also turns off Print and Events.
NOTE
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.
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.