Wildlife Acoustics Echo Meter EM3+ Ultrasonic Recorder User Manual

User Manual
Echo Meter EM3+
Copyright © 2011-2013 Wildlife Acoustics, Inc.
Rev. 4/22/13
All rights reserved. Wildlife Acoustics is registered in the U.S. Patent and
Trademark Office. Song Scope, Song Meter, Echo Meter, EM3+, SM1, SM2,
SM2BAT, Kaleidoscope, and Real Time Expansion are trademarks of Wildlife
Acoustics, Inc. All other trademarks are the property of their respective owners.
U.S. Patent Numbers 7,454,334 and 7,782,195. Additional U.S. and
international patents pending.
Electromagnetic Interference
Note: This equipment has been tested and found to comply with the limits for a
Class B digital device, pursuant to part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against harmful interference in a
residential installation. This equipment generates, uses and can radiate radio
frequency energy and, if not installed and used in accordance with the
instructions, may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off and
on, the user is encouraged to try to correct the interference by one or more of the
following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that
to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
Use of ferrite clamped headphone and microphone cables are required to
comply with the Class B limits in part 15 of the FCC rules. A Fair-Rite
0431173951 ferrite clamp (or equivalent) must be placed on the headphone and/
or microphone cables with the ferrite residing within one loop of the cable. This
ferrite clamp is included with Wildlife Acoustics microphone cables.
Modifications not expressly approved by the manufacturer could void the user's
authority to operate the equipment under FCC rules.
Table of Contents
Table of Contents
Introduction..........................................................................
1
Getting Started.....................................................................
Layout ..............................................................................
Buttons and Ports .......................................................
Display .......................................................................
Powering Up ....................................................................
Settings.............................................................................
Time ...........................................................................
Sample Rate ...............................................................
Prefix..........................................................................
Format........................................................................
Max dur......................................................................
Trigger .......................................................................
Schedule.....................................................................
Buttons .......................................................................
Save and exit..............................................................
Erase all files..............................................................
Set factory defaults ....................................................
Gain..................................................................................
3
3
3
4
4
5
5
5
6
6
7
7
8
8
9
9
9
9
Monitoring and Playback....................................................
Volume and Output source ..............................................
Starting and Stopping Monitoring ...................................
Monitoring Modes ...........................................................
Real Time Expansion (RTE)......................................
Heterodyne Monitoring..............................................
Playback...........................................................................
11
11
11
11
12
12
13
Spectrogram Display ...........................................................
Viewing Modes and Adjustments....................................
Compressed and Expanded Views...................................
Viewing Spectrogram History .........................................
Frequency Reference Line ...............................................
15
15
16
17
18
Copyright © 2011-2013 Echo Meter EM3 User Manual
iii
Table of Contents
Zooming in the X and Y Axes ......................................... 18
Recording..............................................................................
Active Recording .............................................................
Recording Modes.......................................................
Stopping and Restarting.............................................
Trigger Display ..........................................................
Time Stamps ..............................................................
Tags and Voice Notes ................................................
Scheduled Recording .......................................................
21
21
21
22
22
22
23
23
Batteries and Charging .......................................................
Charging ..........................................................................
Monitoring Battery Life...................................................
Other Power Options .......................................................
25
25
26
26
Flash Cards........................................................................... 27
Managing the Recordings ................................................... 29
Transferring the Recordings to a Computer .................... 29
Using Kaleidoscope ......................................................... 29
Optional GPS Antenna........................................................ 31
Using the GPS Antenna ................................................... 31
Viewing the GPS Data..................................................... 32
Specifications........................................................................ 33
Warranty .............................................................................. 35
Declaration of Conformity (EN 45014).............................. 39
iv
Echo Meter EM3 User Manual Copyright © 2011-2013
Introduction
Introduction
The Echo Meter EM3 Handheld Ultrasonic Recorder was designed from the
ground up specifically for active ultrasonic handheld monitoring. It includes
several technologies for monitoring bats in real-time and to simultaneously
record bats using both full spectrum and zero crossing technology. Additionally,
using state of the art digital signal processing techniques, the Echo Meter
features the first ever real-time spectrogram in a handheld unit.
The recorder is designed for outdoor use and can handle extreme hot or cold
temperatures as well as high humidity. It is not, however, designed for use in
precipitation.
The EM3+ has a new face with improved look and glow in the dark buttons to
help you locate the proper buttons while operating in the dark. A wrist strap is
also now included with the unit
The EM3+ is shipped ready to use. Included in the box with the EM3+ you will
find:
(1) Manual
(4) Rechargeable Batteries
(1) AC Charger (will charge batteries in the unit)
(1) 4GB SDHC flash card
(1) Wrist strap
(1) Soft Carrying Case
The optional GPS accessory automatically logs your position for walking or
driving transect surveys and accurately sets the EM3+'s internal clock to the
correct time.
The EM3+ can be used as a short-term passive recorder using a simple
scheduling option. For complex schedules or long-term passive recording in any
environment, the Wildlife Acoustics Song Meter SM2BAT+ is a more
appropriate detector.
Copyright © 2011-2013 Echo Meter EM3 User Manual
1
Introduction
2
Echo Meter EM3 User Manual Copyright © 2011-2013
Getting Started
Getting Started
Layout
The layout of the EM3+ inputs and buttons can be seen below. The
subsequent sections of this User Manual will discuss the functionality
behind the buttons in detail.
Buttons and Ports
Internal Microphone
External
Microphone Input
Real-time
Spectrogram
Gain Switch
GPS Input
Headphone Input
Compress/
Expand Button
AC-DC Charger
Input
Power
Record
Stop
Play
X/Y
Up
Down
Left
Right
Fraction Buttons
Buttons
Letter Buttons
Plus
RTE/het Buttons
Minus
Buttons
Display and
Volume Buttons
Wrist Strap
Copyright © 2011-2013 Echo Meter EM3 User Manual
3
Getting Started
Display
Card Capacity
Battery Indicator
Compressed/Expanded
Trigger Indicator
Axis Indicator
Mode
Optimal het
Freq.
Monitoring
Mode
Waveform
Freq.
Ref.
Line
X Scale
Time
het Freq
Buffer Location
GPS Status
Indicator
GPS Location
Powering Up
To power on the unit, press the Power button until you see the Wildlife
Acoustics splash screen. After a few seconds you will see the spectrogram.
The first time you power up the unit, it will be in monitoring mode. When
the unit is powered down it will remember its last mode for the next power
up. To turn off the EM3+, just press and hold the power button until you see
"Shutting Down" on the top of the display. The spectrogram history buffer
and the settings are preserved and present when you turn the unit back on.
4
Echo Meter EM3 User Manual Copyright © 2011-2013
Getting Started
Settings
Press and hold the X/Y button to enter the settings menu.The default
settings are shown below.
Use the Left and Right Arrow buttons to navigate to a setting field and the
Up and Down Arrow buttons to change the setting. When positioned at a
left most settings field, the Up and Down Arrow buttons will go to the
previous and next settings row.
Time
Set the time and date as well as the UTC (Universal Time Coordinated)
time zone offset. The UTC setting is necessary to assure the correct
time display when using the GPS. If the batteries are removed from the
EM3+ for longer then about 30 seconds, the clock will cease to keep
time. If the clock has been reset due to extended removal of batteries
or batteries that have been fully discharged, the clock setting will blink
??:??:?? on the spectrogram display so you know it is incorrect and
needs to be set.
Sample Rate
Set 256kHz or 384kHz sample rate. Each can record frequencies up to
a maximum of half the selected sample rate (i.e. 128kHz and 192kHz
respectively). The 384kHz setting will consume card space faster and
the echolocations displayed on the spectrogram will be less smooth. At
the higher 384kHz sample rate, the spectrogram display is not
Copyright © 2011-2013 Echo Meter EM3 User Manual
5
Getting Started
“overlapped” as with the 256kHz sample rate so the echolocations
shown will appear more pixelated.
Prefix
Here you can specify a filename prefix of up to 12 characters that will
be prepended to the recordings filename. This can be used to uniquely
label recordings made by each Echo Meter (e.g. to designate a location
and/or project). Use the Up and Down button to scroll through the
letters, numbers and hyphen. Use the Right button to advance to the
next character space.
Format
There are three recording formats that can be selected; WAC, WAV or
WAV/ZC. In WAC mode, recordings are made in Wildlife Acoustics'
proprietary lossless WAC compression format (WAC0 for those
familiar with Wildlife Acoustics’ Song Meter passive recorders). WAC
files are intended to be set for long durations, several minutes to 30
minutes. Triggers are embedded in the WAC file instead of creating an
individual file for each trigger.
In WAV mode, a discrete WAV file is created for each trigger. In WAV/
ZC mode, an Anabat sequence file is additionally created. For ZC
output, the division ratio used is either 8 in RTE or het monitoring
mode (details on those later), or twice the division ratio selected when
using FD monitoring mode.
The best recording format is dependent on your particular needs. WAC
does have a few advantages over WAV/ZC. In WAC, files will be about
60% the size of WAV files. Additionally, in WAC mode, the unit
records continuously until the max duration is reached. There is no
pause time between triggers, it is always ready to record. Another
advantage is that you can monitor uninterrupted in WAC mode whereas
in WAV mode, RTE output and the spectrogram will pause during the
save and prepare file process, which takes under a second after each
triggered recording.
WAC files can be opened directly in Wildlife Acoustics’ Kaleidoscope
software but they can also be converted to WAV or ZC files using the
Kaleidoscope Conversion Tool, a free component of Wildlife
Acoustics’ Kaleidoscope software. This process is usually better than
6
Echo Meter EM3 User Manual Copyright © 2011-2013
Getting Started
native ZC recordings because Kaleidoscope can create ZC files using
a full spectrum recording of weak signals that would be missed by a
native ZC recording. More details about Kaleidoscope can be found in
the Managing Recordings chapter of this manual as well as the Wildlife
Acoustics website where you can also download the software from the
downloads page.
Max dur
Maximum duration sets the maximum recording time in any recording
mode. This can be set from 1 second to 30 minutes. In WAV or WAV/
ZC mode, this will set the maximum trigger length. This can be used
to specify a max recording size to assure compatibility with your
analysis software. In WAC mode this is used to set the maximum WAC
recording time. It will not affect trigger length. Max trigger length for
WAC files can be adjusted in post processing using the Kaleidoscope
software.
It is important to note that when the batteries die during a recording,
that recording cannot be written to the card and is lost. For this reason,
you may want to set the max duration setting lower in WAC so as to
prevent data loss. There will be a couple of seconds in between each
WAC file where data will not be recorded.
Trigger
These are the r settings that determine what the EM3+ considers a
triggered event for recording. Triggers allow significant reductions in
file size by only recording when there is bat activity. Note that these
settings have no effect on what will be displayed on the spectrogram or
presented in the speaker/headphone audio.
The EM3+ monitors the spectral noise across the frequency spectrum.
When a signal is detected that is both above the specified trigger
frequency (in kHz) and is at least the specified level threshold (in dB)
above the ambient background levels, a trigger is detected and the unit
will begin recording. The recording will continue until no trigger is
detected for the specified trigger window period of time or until the
maximum duration (see above) has been reached.
To enable a recording trigger, first set the frequency threshold in kHz.
This is the setting directly to the right of “Trigger:” and should be set
Copyright © 2011-2013 Echo Meter EM3 User Manual
7
Getting Started
lower than the frequency of any echolocation of interest. Note that
lower values may result in false triggers from low frequency noise
sources. Next set the amplitude threshold for the trigger. This is
directly to the right of the frequency threshold. Higher values are less
sensitive and lower values are more sensitive. 18dB is recommended as
a good starting point. Next, set the trigger window in seconds. This is
directly to the right of the amplitude threshold. A triggered event will
continue as long as there is activity that exceeds these amplitude and
frequency thresholds and then will continue for the specified trigger
window after the last trigger. In other words the recording will continue
as long as there is activity, and then will continue for the trigger
window after activity has no longer been detected or until the
maximum duration is reached, whichever comes first.
When the EM3+ is triggered and recording, a circle appears to the right
of "RECORD" on the display. The circle also appears when monitoring
so you can get a sense of trigger function and adjust settings
accordingly.
The last setting of the trigger line, directly to the right of the Trigger
window, is Real Time Expansion (RTE). This setting controls the audio
output of the EM3+ unit only. There are 3 different RTE modes that can
be selected here. The default is “SIG” or signal activated so the RTE
speaker output is only enabled when some signal is detected sufficient
to paint pixels on the spectrogram display. The other modes are “TRG”
which will activate the audio output when a recording trigger is active,
and “ON” for which the audio output is always activated. Note again
that this setting on the Trigger line has no effect on the recording, it will
only change the real time audio output.
Schedule
Set the start and stop time for scheduled recordings. You also must
enable the feature here. Details can be found in in “Scheduled
Recording” on page 23.
Buttons
This sets the functionality of the Letter buttons. These buttons can
function as heterodyne frequency presets or can “tag” a recorded file
name with the button letter pressed during the recording.
8
Echo Meter EM3 User Manual Copyright © 2011-2013
Getting Started
The Letter buttons will act as tags unless a heterodyne preset has been
set in the settings menu. Details on tag functionality can be found in
“Tags and Voice Notes” on page 23. If a heterodyne preset is set, that
Letter button will immediately tune to that frequency when in
heterodyne monitoring mode (but will not tag). When in Real Time
Expansion or Frequency Division mode, and a Letter button
configured as a heterodyne preset is pressed, the EM3+ will switch to
heterodyne mode and tune to the preset frequency.
Save and exit
To save all settings, select Yes and then press the X/Y button to exit the
settings menu. You may exit without saving the modified the settings
by pressing and holding the X/Y button.
Erase all files
This will erase all files on the flash card. If you select Yes and then
press the X/Y or RTE/het button, all files will be erased and the EM3+
will exit the settings menu.
Set factory defaults
This will return all settings to the factory presets. If you select “Yes”
and then press the X/Y button, all settings will be returned to factory
defaults and the EM3+ will reboot. Factory default settings include the
settings found in the settings menu as well as contrast, brightness,
display view mode, zoom levels, volume and several other parameters
such that the EM3+ will be in the same state as new (except the time
settings, which are retained). Alternatively, holding down the Left
button while removing and reinstalling a battery will also restore all
factory defaults. This process is also useful to correct any operational
anomalies so it is an excellent trouble shooting technique to try if the
EM3+ is not operating properly.
Gain
Gain is set with a three-way switch on the left side of the EM3+. Available
gains are 36dB, 30dB and 24dB. The settings positions are not in that order.
Positions are shown on the label on the bottom of the unit.
Copyright © 2011-2013 Echo Meter EM3 User Manual
9
Getting Started
The EM3+ ships with 36dB set as a default and this is optimal for most
cases. If a loud bat echolocates very close to the microphone, clipping may
occur and the gain should be set lower for better recording quality.
SM2BAT users note that these gain settings do not equate to the same
settings on an SM2BAT as the EM3+ microphone has a different circuit and
is more sensitive than an SMX-US.
10
Echo Meter EM3 User Manual Copyright © 2011-2013
Monitoring and Playback
Monitoring and Playback
The EM3+ can convert ultrasonic bat echolocations to audible frequencies in
real time using heterodyne (het) technology, or Wildlife Acoustics' Real Time
Expansion (RTE). Regardless of which monitoring technology is selected, the
unit can simultaneously record in full spectrum and optionally zero crossing to
the flash card. Echolocations can also be made audible using time expansion
playback.
Volume and Output source
Sounds can be monitored through the speaker on the back of the unit or
through headphones via the standard stereo headphone connector on the left
side of the unit. Inserting headphones will mute the speaker. To adjust
volume for either, press the Speaker button and then press either the Plus/
Minus buttons or the Up/Down buttons to adjust the volume. Pressing any
other button or waiting 5 seconds exits the volume adjustment mode. The
adjustment level is displayed on the bottom of the screen.
Starting and Stopping Monitoring
To enter monitoring mode from stopped mode, press the RTE/het button.
You will see MONITOR on the top line of the display. This indicates that
the unit is monitoring but not recording. During a recording you will see
RECORDING on the top line of the display indicating that the unit is both
recording and monitoring.
To stop monitoring or recording press the Stop button. In recording mode,
the Stop button will stop both recording and monitoring. Recording is
covered in a subsequent chapter. In stopped mode the spectrogram does not
update and you will see STOPPED on the top line. To restart monitoring,
press the RTE/het button.
If no button is pressed for a few minutes while the EM3+ is in stopped
mode, the unit will power down to conserve batteries.
Monitoring Modes
The RTE/het button toggles between Real Time Expansion (RTE)
broadband monitoring and het monitoring. Broadband monitoring allows
you to hear bats at all frequencies, whereas het monitoring will only play
bats around a tuned frequency. This allows you to monitor in broadband
Copyright © 2011-2013 Echo Meter EM3 User Manual
11
Monitoring and Playback
(while viewing the spectrogram), then you can "zoom in" acoustically on
the echolocations using the het mode if you prefer.
Real Time Expansion (RTE)
Real Time Expansion is a patent pending method of acoustically delivering
the maximum amount of spectral and temporal information of the bat
echolocation in real-time. This allows you to hear a close approximation of
what a bat would hear. The ultrasonic signal is expanded in sub-millisecond
scales, such that the echolocation is actually expanded into the silences
between the echolocations.
In RTE mode the Fraction buttons can be used to select the division ratio
that will be applied to the bat echolocations
The audible output of the bat echolocation will be a fraction of the original
frequency dependent on this selection. For example a 32kHz echolocation
would be heard at 2kHz if the 1/16 division was selected. The division ratio
is shown to the right of the monitoring mode RTE at the top right corner of
the display.
It is important to note that only a brief push is required to toggle between
broadband and het monitoring whereas holding the RTE/het button down
for approximately 2 seconds will toggle the broadband monitoring mode
type between RTE and Frequency Division (FD).
FD broadband monitoring mode can be used check the proper zero crossing
sensitivity threshold which is set for recording. This will be described in
further detail in the “Recording” chapter later in this manual. When “FD”
is displayed before the division ratio at the top right corner of the display the
unit is in this mode and can be returned to RTE mode by pressing and
holding the RTE/het button
Heterodyne Monitoring
Heterodyne (het) is a narrow-band method that lets you tune to a narrow
range of ultrasonic frequencies (about 8kHz range on the EM3+). Het uses
a tunable carrier wave to play the difference in frequency between the
carrier wave and the echolocation. This allows the frequency to be shifted
to an audible frequency range.
Using this technology, small differences in the frequency of the
echolocation can sound quite dramatic in the audible output signal. For
12
Echo Meter EM3 User Manual Copyright © 2011-2013
Monitoring and Playback
example, if the het is tuned to 50kHz and a bat echolocates at 51kHz, the
EM3+ will play back at the difference of 1kHz. If another bat echolocates
at 55kHz it will be heard as 5kHz. Even though the frequencies of the actual
echolocation are only 10% different the sound played for the user is 500%
different. Because of this effect, het can be a useful tool to differentiate
species with similar echolocations at similar but different frequencies. Also
small variations in the echolocation frequency are sometime indicative of
species and are exaggerated by this effect.
Het mode has three methods of tuning the frequency: auto, preset and
manual. When you press the RTE/het button to enter het mode, the EM3+
automatically calculates the optimal het frequency for that bat pass and
tunes the het frequency to that value. To re-tune to a new frequency of a new
bat pass, double click the RTE/het button (this is really switching the EM3+
into broadband mode and then back again to het). This estimated optimal
frequency is displayed in parentheses in the top right of the display and is
shown in all monitoring modes. The tuned het frequency is shown to the
right of that with a .1 Hz resolution and is only shown in het mode. There
is also a triangular indicator on the Y axis indicating the tuned frequency.
You can also go to het mode by pressing one of the Letter buttons if you
have configured the button as a het preset in the Settings menu. If in het
mode, pressing a Letter button will simply tune the EM3+ to that frequency.
If in broadband mode (RTE or FD), pressing a Letter button will switch to
het mode at that frequency in one step.
Additionally, the detector can be fine-tuned manually using the Plus and
Minus buttons.
In het mode, the Fraction buttons have no effect.
Playback
You can also play back the bat echolocations using time expansion. First
press the Stop button to stop recording and monitoring, then scroll back in
time in the spectrogram using the Left Arrow button to the area you would
like to play and press the Play button. You will see PLAYBACK on the top
line of the display and the visible portion of the spectrogram will be played
back, slowed down by the selected division ration on the Fraction buttons.
You can also use the Up and Down Arrow buttons to zoom out the X scale
(in X mode) to include a larger portion of the buffer in the playback. It is
better to be in compressed
Copyright © 2011-2013 Echo Meter EM3 User Manual
13
Monitoring and Playback
mode for playback, as the space in between the echolocations will be quite
long otherwise.
A progress bar at the bottom of the display will be shown during playback
of echolocations from the history buffer. To continue monitoring, press the
RTE/het button, or press the Record button to begin recording.
14
Echo Meter EM3 User Manual Copyright © 2011-2013
Spectrogram Display
Spectrogram Display
The EM3+ has an integrated real-time spectrogram. This allows you to see
important characteristics of bat echolocations as they are happening. The
spectrogram is updated even while monitoring or recording.
Viewing Modes and Adjustments
The default view mode for the spectrogram is “black on white” as shown
below.
If you press and hold the Display button the display will switch to “white
on black mode” as shown below. This mode might be preferred for use in
the field as it is easier on the eyes in the dark.
Copyright © 2011-2013 Echo Meter EM3 User Manual
15
Spectrogram Display
If you momentarily press and release the Display button, you can then
adjust brightness using either the Plus and Minus buttons or Up and Down
buttons. The contrast is adjusted using the Right and Left Arrow buttons.
The adjustment levels are displayed on the bottom of the screen. Pressing
any other button or waiting 5 seconds exits the display adjustment mode.
The backlight can be easily turned off by double clicking the Display
button. This is useful if you are monitoring without watching the screen and
want to conserve power or do not want the display interfering with night
vision. From this state, any button will restore the backlight.
Compressed and Expanded Views
Two viewing options are available, compressed view and expanded view.
You can toggle between these options using the Compress/Expand button.
The icon symbol to the right of the battery capacity symbol on the top line
of the LCD display shows which view you are in. Compressed view is
shown as two straight lines and expanded view as three straight lines.
The compressed view removes the silent intervals between bat
echolocations in the spectrogram so you can see more echolocations on the
display. Expanded view shows the echolocations in “real-time”. This is
useful to understand inter-echolocation timing. In expanded view the
window might display just the empty space between bat echolocations, so
in this view it is better to zoom out. Zooming is described below. The same
bat pass is shown in the two screenshots below. The first screenshot shows
compressed view and the second expanded view.
16
Echo Meter EM3 User Manual Copyright © 2011-2013
Spectrogram Display
Viewing Spectrogram History
While continuing to acquire new bat echolocations, you can scroll back in
time to review recent bat activity by pressing the Left Arrow button.
Pressing and holding the Right or Left Arrow buttons will allow you to
scroll more quickly through the spectrogram. The system can store about 5
seconds of continuous bat signals, but by compressing the silent intervals
between bat echolocations, the actual time can be up to a few minutes
depending on bat activity. The buffer is saved when the EM3+ is powered
off, so when it is turned back on, past echolocations are preserved. Note that
when scrolled back to the back of the buffer to view past echolocations and
still monitoring, the end of the buffer is moving with the new data being
monitored, as it is finite in length. When what you are viewing at the end
of the buffer is overwritten, the display will start to scroll forward in time
with the new data. This can give the impression that you are viewing real
time data, when in fact you are viewing old data that is scrolling. After
reviewing past echolocations you can jump to the front of the buffer to
display real time data by double clicking the X/Y button.
A scrollbar indicator shown as a black horizontal line on the X axis of the
spectrogram indicates where you are in time as you scroll back through the
spectrogram buffer. The width of the bar shows how much of the buffer you
are viewing and the location shows the relative location in the buffer. If
zoomed all the way out such that you were viewing the entire buffer on the
spectrogram, the black bar would cover the entire width of the X axis. In
expanded mode, the behavior might seem odd, as the relative width changes
Copyright © 2011-2013 Echo Meter EM3 User Manual
17
Spectrogram Display
as you scroll back. This is because the silent spaces between echolocations
are stored efficiently; thus the amount of the buffer shown on the display is
dependent on the percentage of silent space on the display.
Frequency Reference Line
A frequency reference line is available to aid in determining the exact
frequency of a bat echolocation. The Plus and Minus buttons move the
reference line in RTE mode. In het mode, however, the Plus and Minus
buttons control the tuning frequency, therefore the reference line cannot be
adjusted while in het mode. The reference line will still display in the
location it was last set before entering the het mode, but to adjust it, you
must switch back to RTE mode.
To hide the reference line, adjust it down and off the screen using the Minus
button. Press the Plus button to scroll it back to visibility
Zooming in the X and Y Axes
In addition to allowing you to review the spectrogram by scrolling through
the buffer, the Arrow buttons and X/Y button allow zooming in on regions
of interest. The X/Y button toggles the Arrow buttons between X mode and
Y mode. The currently selected mode can be seen in the top line of the LCD
display to the right of the Compressed/Expanded icon.
In X mode the Left button scrolls back in time, the Right button scrolls
forward in time, the Up button zooms in and the Down button zooms out.
Note that everything zooms from the right edge of the screen. The X axis
scale is shown in the lower left corner of the display as ms/div (milliseconds
per division or tick mark). For the 384kHz sample rate setting, the available
divisions are 250ms, 100ms, 50ms, 20ms, 10ms, 4ms, 2ms and 1.5ms. For
the 256kHz sample rate setting, the available divisions are 250ms, 100ms,
50ms, 20ms, 10ms, 3ms, 1.5ms and 1ms. If you are scrolled back in time
and want to view the present, just double click the X/Y button.
In Y mode, the Right button zooms the Y-axis zoom (frequency) and the
Left button restores it. While zoomed in, the Up and Down buttons let you
scroll the Y-axis so you can center in on the narrower frequency band of
interest. There is only one zoom level on the Y axis. Since the X mode will
be used more commonly, if left in Y mode the EM3+ will revert back to X
mode after a few seconds.
18
Echo Meter EM3 User Manual Copyright © 2011-2013
Spectrogram Display
The simulated screenshots below show the same bat echolocations in
different modes of operation. The first is shown with the default zoom level,
the next with Y zoom and finally with Y zoom and full X zoom.
Copyright © 2011-2013 Echo Meter EM3 User Manual
19
Spectrogram Display
In all three screenshots, you can see the frequency reference line and in the
last two you can also see the triangular het frequency indicator. All of the
above screenshots show the display with the EM3+ set to a sample rate of
256kHz. At this sample rate you will see a maximum frequency on the Y
scale of 120kHz. If the 384kHz sample rate is selected the Y-axis scale will
go to a maximum of 190kHz.
20
Echo Meter EM3 User Manual Copyright © 2011-2013
Recording
Recording
Active Recording
To begin a recording, press the Record button. This starts a recording in
WAC, WAV or WAV/ZC mode depending on the format selected in the
settings menu. Once the recording has started, the elapsed time of the
recording will be shown on the top line of the display as mm:ss RECORD.
The recording takes under a second to start, during this time you will see
PREPARING on the top line of the display. Note, EM3+ is always in
Monitoring mode while in Recording mode.
Recording Modes
In WAC mode, triggered WAC files will be made back-to-back based
on the Max Duration value in the settings menu.
In WAV or WAV/ZC mode, each trigger will be written as an individual
file. At the end of each trigger you will see SAVING at the top of the
screen as the file is saved and PREPARING as the next file is readied.
When ready, you will see WAIT TRIGGER as the EM3+ waits for a
triggered event. The process of saving a file and opening a new file in
between each recording takes under a second.
It is important to adjust the zero cross threshold before recording in ZC
mode. The threshold must be set such that only higher amplitude
waveforms result in a “zero crossing”. If the crossing was truly zero,
the output would be only white noise and no bats would be heard. The
default threshold setting is quite high and the EM3+ is unlikely to
record any zero cross data at that setting so it must be adjusted. If no
zero crossings are detected in ZC mode, the file will not be written.
The ZC threshold can be set by entering the frequency division adjust
mode by pressing and holding the volume button until FDADJ is
displayed in the upper right corner of the display. Now the Plus and
Minus buttons can be used to adjust the threshold while you listen to
frequency division output. You want to set the threshold a couple levels
above the point that constant white noise is heard. Note that this
threshold has no effect on the RTE mode which does not require any
adjustment.
Copyright © 2011-2013 Echo Meter EM3 User Manual
21
Recording
(Note that zero cross is synonymous with Frequency Division in this
application where usually FD refers to monitoring and ZC refers to
recording)
Stopping and Restarting
To end a recording, press the Stop button (pressing and holding the
Power button will also stop the recording before powering down). Stop
will terminate any active recording and write the file. Stop will also
stop the monitoring mode and STOPPED will show on the top line of
the display. After stopping a recording, you can press the RTE/het
button to resume monitoring mode. Or press Record to start a new
recording and simultaneously initiate monitoring mode.
Trigger Display
When the EM3+ is triggered a circle appears to the right of "RECORD"
on the display. The circle also appears when monitoring so you can get
a sense of trigger function and adjust settings accordingly.
Time Stamps
WAC recordings are saved in a "Data" folder on the flash card and have
names of the form Prefix_YYYYMMDD_hhmmss.wav, where Prefix
is the prefix specified in the settings menu, YYYY is the year, MM is
the month, DD is the day, hh is the hour, mm is the minute, and ss is the
second. In WAC mode, Echo Meter maintains the proper time so that
when the triggers are viewed in Song Scope, Wildlife Acoustics'
licensed analysis software, the appropriate space is shown between
triggers.
When WAC files are converted to WAV or ZC files using
Kaleidoscope, the files will be time-stamped in the filename with a 1
ms resolution. Kaleidoscope will prepend the tag letter (see next
section) to the filename if "split triggers" is selected.
In WAV or WAV/ZC mode, the files are saved to the "Data" folder and
the filenames follow the same convention as above but prepend __ in
front of the year and add A_/B_/C_/D_ or N_ if tagged using the
tagging feature explained in the next section.
22
Echo Meter EM3 User Manual Copyright © 2011-2013
Recording
Tags and Voice Notes
The Echo Meter has the ability to "tag" a recording to aid in
organization of your files. The Letter buttons are used to tag the
individual triggers. This allows you to efficiently sort tagged
recordings during analysis. If in WAC mode, pressing a Letter button
will save that information in the WAC file such that when the WAC is
converted to WAV or ZC files with "split trigger" selected in
Kaleidoscope, the tag letter will be prepended to the filename of the
resultant WAV or ZC files. If in WAV or WAV/ZC mode, the letter will
be prepended to the respective recording file name on the card.
Additionally, holding down any Letter button will extend the trigger
window until the button is released. If you speak while holding down
the Letter button, your voice will be recorded along with the ultrasonic
signal, so you can effectively record a voice note with the bat
echolocations inside the trigger recording. When listening in the bat
analysis software of your choice at real speed you will hear your voice
and no bats. If the recording is played slowed down, you will hear the
bats, but your voice will be shifted to the infrasonic range and will not
be audible.
As there are four options available you can develop any "key" for the
tags that make sense to you. For example, "A" might mean that it was
possibly a very interesting echolocation which you want to analyze
later, "B" might mean that it is definitely not an important recording
and can be discarded, etc. Or you can just use one letter as a voice note
button to indicate that any recording tagged with that letter includes
important voice notes.
A file that is not manually tagged by the user may be automatically
tagged with the letter “N”. The EM3+ unit has an intelligent feature
that is constantly analyzing the recordings. If a recorded file is unlikely
to contain recorded bats (e.g. appears to only contain noise), then the
EM3+ will prepend “N” (for noise) to the file name. However, the tag
buttons (A,B,C,D) will take precedence and will override this
automated feature when pushed regardless of whether the EM3
determines the recording is unlikely to contain Bats.
Scheduled Recording
Scheduled recordings are enabled in the Settings menu. If "enabled" is
selected and the unit is shut down, the EM3+ will auto-wake at the specified
Copyright © 2011-2013 Echo Meter EM3 User Manual
23
Recording
start time, disable the monitoring output, turn off the display backlight, and
start a recording in the selected mode (WAC, WAV or WAV/ZC). It will
continue to make back-to-back recordings until the specified end time is
reached.
While recording, the user can interrupt and stop recording or initiate
monitoring, but the Echo Meter will still power off at the specified end time
unless the scheduled recording setting is disabled in the Settings menu.
Note that if scheduled recording is not enabled, schedule start and end times
are ignored even if set.
24
Echo Meter EM3 User Manual Copyright © 2011-2013
Batteries and Charging
Batteries and Charging
The EM3+ includes four high capacity rechargeable NiMH AA batteries. These
batteries allow up to 12 hours of operating time.
Charging
The integrated charger allows the batteries to be charged by simply
attaching the included charger to the power port on the left side of the EM3+
and plugging the adapter into the wall. The unit will power down during the
charge cycle and cannot be used. The LED on the side of the unit will
display amber (red plus green) until charging is compete at which time it
will display only green. Recharging dead batteries should take 3-4 hours. It
is recommended once a year to replace or condition the batteries in a quality
charger to maintain optimal operating time.
It is possible to swap batteries in the field for longer life. If the swapping is
done within 30 seconds or so, the clock will not reset. All other settings will
be preserved regardless of how long the batteries are absent. Removing the
batteries does, however, erase the spectrogram buffer.
When plugging in the 9V DC charger while the EM3+ is powered on, the
display will show various warning messages regarding safe battery
charging. If a button is pushed the unit will power off in 3 seconds,
otherwise the unit will continue to display the warnings for about 30
seconds before powering down to begin the charge cycle.
WARNING: Never plug in the included charger when non-rechargeable
Alkaline batteries are installed!
WARNING: Charge only rechargeable nickel metal hydride batteries in the
EM3+. Charging any other type of rechargeable or non-rechargeable
(disposable) batteries may cause them to leak, rupture or explode resulting
in risk of fire, property damage, injury or death.
WARNING: Do not use the charger if the LED indicator does not remain
continuously red plus green (amber) during the entire charging cycle. If the
red light blinks on and off while charging, the EM3+ could be damaged and
may cause batteries to leak, rupture or explode resulting in risk of fire,
property damage, injury or death.
WARNING: Charge only on a fireproof surface and away from flammable
material. The EM3+ battery charger is designed to terminate the charging
process when batteries are fully charged, however, in the event of a defect
Copyright © 2011-2013 Echo Meter EM3 User Manual
25
Batteries and Charging
or damage to the batteries or the EM3+, batteries could become extremely
hot resulting in risk of fire, property damage, injury or death.
WARNING: Batteries may become hot to the touch while charging.
Monitoring Battery Life
The top line of the display battery icon shows the battery level in four
increments. When the EM3+ calculates that the battery life is nearly over,
it will alert the user that the batteries are depleted and the unit is shutting
down. If recording, the recording will be saved before shutdown. If the
EM3+ is recording and the batteries are removed, the recording in process
will not be saved.
If no button is pressed in Stopped mode for a few minutes, the unit will
power down to conserve batteries.
Other Power Options
The EM3+ will work with all types of AA batteries, including disposable
alkaline AA batteries, however, the battery level indicator is designed for
the batteries included with your EM3+ unit and may not be accurate for
other types of batteries.
26
Echo Meter EM3 User Manual Copyright © 2011-2013
Flash Cards
Flash Cards
The 4GB SDHC card included with your EM3+ can be used for recording and
is suitable for a night or two of bat recording. A very general rule of thumb for
memory consumption with average bat activity using the recommended trigger
level settings is 2GB of card use per night in WAC mode and 4GB per night in
WAV or WAV/ZC modes.
For longer scheduled recordings, SDHC cards are available up to 32GB and any
Class 4 or higher rated SDHC is a suitable choice.
Although the Wildlife Acoustics SM2BAT+ is a better model for long term or
complex, passive recordings, the EM3+ unit will accept capacities up to 128GB
available in SDXC type cards. Please contact Wildlife Acoustics customer
support for further details.
On the display, card status is either xxx/yyyGB(zz%) to indicate xxx used of yyy
total GB and zz% full, or one of the following:
•
NO CARD
card not present.
•
CARD ERROR
problem mounting card
•
FILE ERROR
problem while writing file to card.
•
NEW CARD
if you remove a card and replace it with a
new card, this is the status until you actually
start recording.
The flash card is also used to upgrade the unit's firmware. To upgrade, put the
EM3+ firmware image on the flash card in your computer. Turn the EM3+ off
and insert the card into the EM3+. Now turn the EM3+ on while holding the Up
Arrow button. You will see any firmware files that are on the flash drive. Select
the newest firmware and press the X/Y button. The EM3+ will upgrade and
restart.
Copyright © 2011-2013 Echo Meter EM3 User Manual
27
Flash Cards
28
Echo Meter EM3 User Manual Copyright © 2011-2013
Managing the Recordings
Managing the Recordings
Transferring the Recordings to a Computer
Simply remove the flash card from the EM3+ and place in a suitable card
reader on your computer. You can open the files directly from the card or
drag and drop them onto your computer.
Using Kaleidoscope
You will also want to download and install the latest version of Wildlife
Acoustics’ Kaleidoscope post-processing software from the “Downloads”
section of Wildlife Acoustics’ website at www.wildlifeacoustics.com.
The free version of this software can convert from WAC, WAV, and Zero
Crossing formats to WAV and Zero Crossing formats while filtering out
unwanted signals. (Upgrading to Kaleidoscope Pro will add automatic
classification of bats from both North America and the United Kingdom)
Copyright © 2011-2013 Echo Meter EM3 User Manual
29
Managing the Recordings
30
Echo Meter EM3 User Manual Copyright © 2011-2013
Optional GPS Antenna
Optional GPS Antenna
An optional GPS antenna is available to log the GPS location of recordings and
to sync the clock to the GPS time base with a less than 1 ms error.
Using the GPS Antenna
The GPS antenna plugs into the port on the right side of the EM3+ and
attaches to the back of the device with the supplied fastening “dots”. The
antenna can be extended if necessary for better placement (during car
transects for example) using a standard CAT-5 network extension (male to
female) cable.
When the GPS is plugged in, “?” will appear to the right of the time on the
bottom line of the display. This indicates that a GPS antenna is connected
and recognized but not yet synchronized. When the GPS has acquired
satellites and is time synchronized, “?” will be replaced with “$”. If the
display shows “!”, instead, then an error has occurred communicating with
the antenna. Check the connection and try again.
The latitude and longitude will be displayed to the right of the time in
decimal degrees format. If the GPS has been used recently in the area, the
position fix will take under a minute. If a significant amount of time has
elapsed or the GPS has been shipped some distance, the GPS must
download new tables. In this case the first position fix can take up to 40
minutes, but subsequent fixes should still occur in under a minute.
The GPS uses the WGS-84 coordinate system and uses WAAS mode for
increased accuracy in North America and Hawaii.
Copyright © 2011-2013 Echo Meter EM3 User Manual
31
Optional GPS Antenna
Viewing the GPS Data
GPS data is logged once per second. If the recordings are in WAC mode and
converted to WAV in Kaleidoscope, you can choose to generate a KML file,
which can be opened directly in Google Earth as well as many other
applications that can display KML. Alternatively, a gps.txt log file with the
GPS coordinates from the end of each triggered event will be generated and
stored in the converted recordings destination folder. If converted to ZC, the
GPS coordinates will be placed within the file such that they can be natively
viewed in compatible zero crossing software. If recording in WAV or WAV/
ZC mode, locations of each WAV will be stored in a gps.txt log file and the
location will be embedded in the ZC file. Whether created on the EM3+ in
WAV or WAV/ZC mode or in Kaleidoscope during conversion, the gps.txt
file has the appropriate heading to allow easy conversion to Google Map or
Earth files using http://www.gpsvisualizer.com./
32
Echo Meter EM3 User Manual Copyright © 2011-2013
Specifications
Specifications
•
Dimensions:
• 5.7 in (14.5 cm) long
• 3.6 in (9.1 cm) wide
• 1.25 in (3.2 cm) high
•
Weight:12 oz (0.34 kg) with included batteries
•
Operating Temperature Range: -4ºF to +185ºF (-20ºC to +85ºC)
•
Battery Run Time: Up to 12 hours per charge
•
Battery Charge Time: 4 hours
•
Audio Sample Rate: 256kHz or 384kHz
•
Microphone Directionality:
• Optimal signal is ±30º vertically and ±60º horizontally
•
Effective Microphone Bandwidth: 1kHz to 192kHz
•
Microphone Frequency response:
EchoMeterEM3FrequencyResponse
25
20
15
RelativeSensitivity(dB)
10
5
0
Ͳ5
Ͳ10
Ͳ15
Ͳ20
Ͳ25
20,000
40,000
60,000
80,000
100,000
120,000
140,000
160,000
180,000
Frequency(Hz)
Copyright © 2011-2013 Echo Meter EM3 User Manual
33
Specifications
34
Echo Meter EM3 User Manual Copyright © 2011-2013
Warranty
Warranty
Wildlife Acoustics Inc. Limited Warranty
HARDWARE: Wildlife Acoustics, Inc. ("WAI") warrants to the original end
user ("Customer") that new WAI branded products will be free from defects in
workmanship and materials, under normal use, for one (1) year from the original
purchase date. WAI warrants refurbished WAI products, marked and sold as
such, for ninety (90) days from the original purchase date.
SOFTWARE: WAI warrants to Customer that any WAI branded software will
perform in substantial conformance to their program specifications for a period
of ninety (90) days from the date of original purchase. WAI warrants the media
containing software against failure during the warranty period. WAI makes no
warranty or representation that the operation of the software products will be
uninterrupted or error free, or that all defects in the software products will be
corrected.
EXCLUSIONS
This warranty excludes (1) physical damage to the surface of the product,
including cracks or scratches on the outside casing; (2) damage caused by
misuse, neglect, improper installation or testing, unauthorized attempts to open,
repair, or modify the product, or any other cause beyond the range of the
intended use; (3) damage caused by accident, fire, power changes, other
hazards, or acts of God; or (4) use of the product with any non-WAI device or
service if such device or service causes the problem.
Any third party products, including software, included with WAI products are
not covered by this WAI warranty and WAI makes no representations or
warranties on behalf of such third parties. Any warranty on such products is
from the supplier or licensor of the product.
EXCLUSIVE REMEDIES
Should a covered defect occur during the warranty period and you notify WAI,
your sole and exclusive remedy shall be, at WAI's sole option and expense, to
repair or replace the product or software. If WAI cannot reasonably repair nor
replace then WAI may, in its sole discretion, refund the purchase price paid for
the product. Replacement products or parts may be new or reconditioned or
comparable versions of the defective item. WAI warrants any replaced or
repaired product, part, or software for a period of ninety (90) days from
shipment, or through the end of the original warranty, whichever is longer.
Copyright © 2011-2013 Echo Meter EM3 User Manual
35
Warranty
OBTAINING WARRANTY SERVICE: Customer should refer to WAI's
website at www.wildlifeacoustics.com/support for information on obtaining
warranty service authorization. Methods for obtaining warranty service may
vary depending on whether purchases were made from an authorized provider
of WAI products, or from WAI directly. All requests for warranty service
authorization must be made within the applicable warranty period. Dated proof
of original purchase will be required. Products or parts shipped by Customer to
WAI must be sent postage-paid and packaged appropriately for safe shipment.
WAI is not responsible for Customer products received without a warranty
service authorization and may be rejected. Repaired or replacement products
will be shipped to Customer at WAI's expense. All products or parts that are
replaced become the property of WAI. WAI shall not be responsible for
Customer's software, firmware, information, or memory data contained in,
stored on, or integrated with any products returned to WAI for repair, whether
under warranty or not. The repair and replacement process for products or parts
in locations outside of the United States will vary depending on Customer's
location.
WARRANTIES EXCLUSIVE: THE FOREGOING WARRANTIES AND
REMEDIES ARE EXCLUSIVE AND IN LIEU OF ALL OTHER
WARRANTIES, TERMS OR CONDITIONS, EXPRESS, IMPLIED OR
STATUTORY, INCLUDING WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, ACCURACY,
CORRESPONDENCE WITH DESCRIPTION, SATIS- FACTORY QUALITY
AND NON-INFRINGEMENT, ALL OF WHICH ARE EXPRESSLY
DISCLAIMED BY WAI AND ITS SUPPLIERS.
LIMITATION OF LIABILITY: NEITHER WAI NOR ITS SUPPLIERS
SHALL BE LIABLE FOR INCIDENTAL, CONSEQUENTIAL, INDIRECT,
SPECIAL, OR PUNITIVE DAMAGES OF ANY KIND, LOSS OF
INFORMATION OR DATA, LOSS OF REVENUE, LOSS OF BUSINESS OR
OTHER FINANCIAL LOSS ARISING OUT OF OR IN CONNECTION
WITH THE SALE OR USE OF THIS PRODUCT, WHETHER BASED IN
CONTRACT, TORT (INCLUDING NEGLIGENCE), STRICT PRODUCT
LIABILITY OR ANY OTHER THEORY, EVEN IF WAI HAS BEEN
ADVISED OF THE POSSIBILITY OF SUCH DAMAGES AND EVEN IF
ANY LIMITED REMEDY SPECIFIED IN THIS LICENCE AGREEMENT IS
DEEMED TO HAVE FAILED OF ITS ESSENTIAL PURPOSE. WAI'S
ENTIRE LIABILITY SHALL BE LIMITED TO REPLACEMENT, REPAIR,
OR REFUND OF THE PURCHASE PRICE PAID, AT WAI'S OPTION. IN NO
EVENT SHALL WAI'S LIABILITY FOR ALL DAMAGES RELATED TO
THE PURCHASE OF PRODUCT EXCEED THE AMOUNT PAID FOR THE
36
Echo Meter EM3 User Manual Copyright © 2011-2013
Warranty
APPLICABLE PRODUCT. THE FOREGOING LIMITATIONS WILL APPLY
EVEN IF THE ABOVE STATED REMEDY FAILS OF ITS ESSENTIAL
PURPOSE.
DISCLAIMER: Some countries, states, or provinces do not allow the exclusion
or limitation of implied warranties or the limitation of incidental or
consequential damages so the above limitations and exclusions may be limited
in their application to you. When implied warranties may not be excluded in
their entirety, they will be limited to the duration of the applicable written
warranty. This warranty gives you specific legal rights; you may have other
rights that may vary depending on local law. Your statutory rights are not
affected.
GOVERNING LAW: This Limited Warranty shall be governed by the laws of
the Commonwealth of Massachusetts, U.S.A., and by the laws of the United
States, excluding their conflicts of laws principles. The United Nations
Convention on Contracts for the International Sale of Goods is hereby excluded
in its entirety from application to this Limited Warranty.
Wildlife Acoustics, Inc., 970 Sudbury Road, Concord, MA 01742-4939, United
States of America, (888) 733-0200, www.wildlifeacoustics.com
Copyright © 2011-2013 Echo Meter EM3 User Manual
37
Warranty
38
Echo Meter EM3 User Manual Copyright © 2011-2013
Declaration of Conformity (EN 45014)
Declaration of Conformity (EN 45014)
•
Manufacturer:
Wildlife Acoustics, Inc.
970 Sudbury Road
Concord, MA 01742-4939
United States of America
•
Declares that the following product:
Product Name:
Echo Meter
Product Model Numbers: EM3+
Product Type:
Handheld Bat Detector and Recorder
Conforms to the appropriate country standards and governing regulations listed
below. We, as the manufacturer, are fully responsible for the design and
production of the above-mentioned equipment.
•
FCC Part 15, Class B Federal Communications Commission
Rules Part 15
•
ICES-003, Class B
2004, Industry Canada, InterferenceCausing Equipment Standard, Digital
Apparatus
•
EN 55011, Class B
2007, Industrial, scientific and medical
(ISM) radio-frequency equipment Electromagnetic disturbance
characteristics - Limits and methods of
measurement
•
AS/NZS CISPR 11, Class B2004, Industrial, scientific and
medical (ISM) radio-frequency
equipment - electromagnetic
disturbance characteristics - limits and
methods of measurement
Copyright © 2011-2013 Echo Meter EM3 User Manual
39
Declaration of Conformity (EN 45014)
•
CISPR Publication 11, 2003/A2, 2006Industrial, scientific and
medical (ISM) radio-frequency
equipment - Electromagnetic
disturbance characteristics - Limits and
methods of measurement
•
EN 61326-1:2006
Electrical Equipment for Measurement,
Control and Laboratory Use EMC
Requirements
•
EN 61000-4-2
Electrostatic Discharge (ESD) 4kV
Contact Discharge, 8kV Air Discharge,
4kV Horizontal and Vertical Coupling
Planes (HCP and VCP, respectively)
•
EN 61000-4-3
Radiated Electromagnetic Fields, 3 V/
m, 80 to 1000 MHz; 3V/m, 1.4 GHz to 2
GHz; 1 V/m, 2 GHz to 2.7 GHz
This class B digital apparatus also meets all requirements of the Canadian
Interference-Causing Equipment Regulations.
Cet appareil numerique de la Classe A respecte toutes les exigences du
Reglement sur le materiel brouilleur du Canada.
This product operates on 6V DC.
This product was tested in a typical configuration. Note that there may be some
undesirable recording quality when subjected to electromagnetic interference
with the optional GPS attached..
Ian Agranat, President
Wildlife Acoustics, Inc.
November 1, 2011
40
Echo Meter EM3 User Manual Copyright © 2011-2013
Declaration of Conformity (EN 45014)
Copyright © 2011-2013 Echo Meter EM3 User Manual
41
User Man
Echo Meter EM3+
Wildlife Acoustics, Inc.
970 Sudbury Road
Concord, MA 01742-4939 USA
www.wildlifeacoustics.com
+1-978-369-5225
©2013 Wildlife Acoustics, Inc.
">