Gecko Compact Operational manual

Gecko
141 Palmer Street, Richmond VIC 3121 AustraliaT:[phone] [email protected]
For all models: Compact, Rugged, Blast, Tremor, Prism, SMA & SMA-HR
Seismographs, Accelerographs
Recorders, Vibration Monitors

Welcome to the world of simplified seismic recording with your new Kelunji Gecko
seismograph. Within minutes you can be recording earthquakes, blasts and other ground
vibrations using our latest generation instrument that takes high dynamic range, high
sample rate, low power, continuous recording into new territory.
In the Gecko, we have reinvented the modern digital seismograph. The low cost of flash
memory means you can save weeks, months, even years of continuous data on a single
memory card. The Gecko can record everything continuously while logging trigger times for
you to sort through back at the lab. Even if your trigger settings missed the event, you’ll
always be able to retrieve that chunk of time from the continuous archive.
An even more efficient way of managing your data is not to have to collect it at all, so we
have included a simple telemetry protocol that streams data packets over the Internet via a
cellular data modem or Ethernet link. Data from all of your stations is then available in a
single archive for you to access whenever you need it. Simply install our free “Live Stream”
data reception software on your Windows, Mac or Linux PC and watch your data live on
screen while it is archived away to your PC. Live Stream is ideal for collating data from
multiple network-connected structural monitoring instruments. Download it free today from
the SRC website: https://www.src.com.au/downloads/live-stream/
Our “Waves” waveform analysis application is available as a free download for Windows,
Mac and Linux from http://www.src.com.au/downloads/waves/ . Each Gecko purchased is
entitled to one Waves product key that will remove the advertisement that pops up for 10
seconds when you launch the program. Simply email [email protected] with your recorder
serial number to obtain a product key. Each product key can only be used once and is not
transferable to another computer.
Happy recording!
From the Gecko development team.

Table of Contents
Getting Started .................................................................................1
Setting up your recorder .....................................................................................1
The User Interface ..............................................................................................2
Menu Map............................................................................................................3
The Home Screen..............................................................................4
Status Screen Loop – Right Button ......................................................................4
Realtime Data Loop – Up Button..........................................................................5
Sensor Signal .................................................................................................... 5
Vector Sum ....................................................................................................... 5
Raw Signal ........................................................................................................ 5
The Main Menu..................................................................................6
Unmount SD card ................................................................................................6
Data Storage ..................................................................................................... 7
Station Info.........................................................................................................7
Station Code ..................................................................................................... 8
Network Code....................................................................................................8
Location ID ....................................................................................................... 8
Sample Rate ........................................................................................................9
Channels to Store ..............................................................................................10
Channels to Send ..............................................................................................10
Sensor Setup.....................................................................................................10
3D Sensor....................................................................................................... 10
External 1D Sensor .......................................................................................... 13
Input Amplifier..................................................................................................14
Trigger & Alarm.................................................................................................15
Level Triggering ............................................................................................... 15
STA/LTA Triggering .......................................................................................... 16
Alarm Outputs ................................................................................................. 17
System Alerts .................................................................................................. 17
On-screen Alerts .............................................................................................. 18
Telemetry..........................................................................................................18
Mode.............................................................................................................. 19
Device ............................................................................................................ 19
3G modem Settings.......................................................................................... 19
Settings File ......................................................................................................20
Start Calibration................................................................................................20

Data Storage and Formats ..............................................................21
The Root Directory ........................................................................................... 22
The Data Folder ............................................................................................... 22
The Histogram Folder ....................................................................................... 23
MiniSEED files ...................................................................................................23
Upgrading the Gecko firmware..........................................................................24
Ports & Wiring ................................................................................24
Power connector ...............................................................................................24
Alarm & Communications port...........................................................................25
4D Sensor port (2018 Compact & Rugged)........................................................25
1D Sensor port (mid-2019 Blast & SMA) ...........................................................25
Register your Gecko........................................................................26
Warranty ........................................................................................26
Extended warranty............................................................................................26
Appendix A .....................................................................................28
Installing the Gecko Blast or SMA .....................................................................28
Gains, range and clip levels ............................................................................... 29
Installing the Gecko SMA-HR ............................................................................30
Calibrating a Gecko SMA-HR .............................................................................. 32
Installing the Gecko Tremor..............................................................................32
Installing the Gecko Prism ................................................................................33
Checking Sensor Operation................................................................................ 33
Appendix B .....................................................................................34
Internal Battery ................................................................................................34
Charge Regulator ..............................................................................................35
LED Patterns (routine) ...................................................................................... 35
LED Patterns (exceptions) ................................................................................. 35
Appendix C .....................................................................................36
Perle IOLAN DS1 Ethernet Adaptor ...................................................................36
Change IP address of the Ethernet adaptor.......................................................37
Define IP address of Kelunji Hub computer .......................................................38

1
Getting Started
All Gecko models have a 2-pin power port, 6-pin alarm/communications port, and a coaxial
GPS aerial connection. From mid 2019 Gecko Blast & SMA models also have a 4-pin port for
an external sensor channel. Gecko Compact & Rugged have a 19-pin sensor connection.
Setting up your recorder
The two-pin connector is the power input to the Gecko. The default Gecko operating voltage
range is 11.5 and 24 Volts DC (useful for 12V DC battery over-discharge protection), but it
can be factory switched to extend the range to 7V to 30V DC at no cost. If the power is
removed then restored, the Gecko will restart using the saved settings.
The Gecko only takes a few seconds to initialise the operating system after power is applied.
If an SD card is installed, the recorder will start storing continuous data to the SD card
within seconds.
The small gold coaxial socket is the connection for the GPS aerial. The GPS is crucial in
maintaining accurate absolute time to synchronise recordings from various instruments and
monitoring locations, but it also provides global position information. Simply screw the GPS
cable plug onto the threaded GPS socket until finger-tight.
The Gecko Compact and Rugged is supplied with a sensor plug which you can attach to your
sensor cable. You can find the wiring diagram at the end of this manual. Align the keyed
plug with the socket and push it on, locking it in place with the bayonet-style collar.
At this point you now have a fully functioning recorder, but you will need to modify some
settings to suit your application. Setting a unique station code is an essential starting point.

2
The User Interface
The Gecko does not require a computer to control it. All recorder settings are accessible
through the LCD and are modified using the four control buttons.
Gecko Compact (above)
Gecko Rugged; and Gecko Prism, Tremor & Blast velocity sensors (above)
Gecko SMA, SMA-HR, and Prism acceleration sensors (above)
SEISMOGRAPH
RIGHT
MENU
(LEFT)
UP DOWN
ACCELEROGRAPH
RIGHT
MENU
(LEFT)
UP DOWN

3
Menu Map
After start-up, pressing the Menu button will toggle between the main menu and the home
screen. The LCD backlight will stay on for 2 minutes from the last button press.
On most screens you can scroll Up and Down through a list and enter a menu item or
toggle a setting by using the Right button. Pressing the Menu button will save the current
setting and take you back one menu level.
E: -2,726 0.6
N: 4,326 0.8
Z: -698 0.7
O: 12,356 1.2 *1
p
3D 0.1234567 mm/s
max 11.1234567 mm/s
1D 80.2123546 dB *1
max 101.1234567 dB *1
p
2019-04-01 11:52:18
E: -0.0439408 mm/s
N: 0.0360011 mm/s
Z: -0.0011021 mm/s
p
Home Screen Info & Telemetry 3D Sensor Info GPS location information
2019-04-01 11:52:16 Volt: 14.06 500sps
3D Sensor Name & S/N
*2 Lat: -37.8189800
GECKO Storing ENZO+ uTemp: 35.5° x512 uGecko Blast uLong: 145.0109620
GPS:04 Sending ___O+ #2000343 v4.2.4271 586-H2 586-H1 586-V3 Sats: 12 Alt: 22m
32GB free:92.23495% Connected to Server Type: Acceleration hAcc: 10m vAcc: 19m
Main Menu Station Information Save Continuous Data 3D Sensor
Unmount SD card Station Code Channel E: On Sensor Name
> Station Info > Network Code Channel N: On > Units
Sample Rate Location ID (3D) Channel Z: On Sensitivity ch E
Channels to Store Location ID (1D) *1 Channel O: On *1 Sensitivity ch N *5
Channels to Send 3D Vector: Off Sensitivity ch Z *5
3D Sensor *3
3D Sensor
Auto-Zero Delay *5
1D Sensor *1
Select a Sensor
Cal Enable *5
Input Amplifier > Select a Sensor Custom Sensor Cal Type *5
Trigger & Alarm Sensor Serial No > Geophone 28.8V/m/s Cal Duration *5
Telemetry Mass Lock *5 Geospace GS-1 1Hz Cal Sine Freq *5
Settings File Mass Unlock *5 ...<more> SIG+ Mode: Normal *5
Start Calibration *4 *5 SIG- Mode: Normal *5
Input: DC Offset *5
Communications STA/LTA Triggering
Trigger & Alarm
Enable: Off
Level Triggering
> Mode: Continuous > Threshold
Device: 3G modem > Level STA window size > Enable: Off
TCP Socket Port *6 STA/LTA LTA window size Set Trigger Level
Server IP/Domain *6 Alarm Outputs Filter: 2-20Hz
Carrier APN *6 System Alerts Channel: Z+N+E
Raw Values
Vector Peak
Sensor Signal
Gecko menu appearance will vary by model:
*1 will not appear on 3-channel models
*2 "1D Sensor Info" will show here for 4-channel models
*3 will only appear on Gecko Compact & Rugged
*4 will only appear if sensor has calibration function
*5 will not appear when setting up 4th channel
*6 will only appear for 3G modem on menu re-entry

4
The Home Screen
The home screen shows:
• the Gecko clock’s date and time (in UTC – Universal Time Coordinated)
• station code, and which channels are being stored to the SD card
• number of GPS satellites visible; and channels being sent via Telemetry
• SD card capacity and percentage of storage remaining
2019-04-01 05:52:16
GECKO Storing ENZO+
GPS:04 Sending ___O+
32GB free:92.23495%
“O” is the 4th channel on some Gecko models, and “+” is the vector sum of channels ENZ.
The “Storing” word animates using qdown arrows to indicates packets of data for the
displayed channels are being written to the SD card. The “Sending” word animates using p
up arrows to indicate packets of data for the displayed channels are being streamed to a
remote computer.
Status Screen Loop – Right Button
Version 4 of the Gecko firmware expands the status line to several status pages. These are
shown on the Menu Map within the blue area. Press the Right button to scroll through
them, or press the Menu/Left button to return to the Home screen.
• The first screen shows input power voltage and CPU temperature, the current sample
rate and input amplifier (gain) setting, followed by the Gecko serial number and
firmware version number. The firmware version now integrates the “build” number.
If telemetry is enabled, the bottom line shows the connection status
• The next screen shows the name and serial number of the 3D sensor connected to
channels ENZ. The sensor type is shown on the bottom line
• If you have a 4-channel recorder, the next screen shows the 1D sensor information
• The final screen shows the GPS location information. The “hAcc” value is the
horizontal accuracy value of the GPS aerial position in metres as read from the GPS
receiver, and “vAcc” is the vertical accuracy.
Home Screen Info & Telemetry 3D Sensor Info GPS location information
2019-04-01 11:52:16 Volt: 14.06 500sps
3D Sensor Name & S/N
*2 Lat: -37.8189800
GECKO Storing ENZO+ uTemp: 35.5° x512 uGecko Blast uLong: 145.0109620
GPS:04 Sending ___O+ #2000343 v4.0.4234 586-H2 586-H1 586-V3 Sats: 12 Alt: 22m
32GB free:92.23495% Connection Status Type: Acceleration hAcc: 10m vAcc: 19m

5
Realtime Data Loop – Up Button
Press the Up button from the Home screen to view real time sensor data.
Sensor Signal
The first screen shows sensor output in real units in real time. These values are calculated
based on the sensor and gain settings. Tap or shake the sensor to see the numbers change.
Pressing the Right button on this screen will prompt you to
press the Right button again to reset the zero level. The
Zero Level is set based on the average signal level over the
next 2 seconds.
If you have a 4-channel Gecko, the date and time line will not be shown, with channel O
appearing at the bottom with its live sensor units values shown as per the settings.
Vector Sum
The next screen Up shows the live vector sum of the 3D sensor, and holds the peak value.
For 4-channel models, the live data from channel O is shown and its peak (max) value held.
Pressing the Right button on this screen will prompt you to
press the Right button again to clear the peak values.
Raw Signal
Pressing Up again will display the raw numbers from the ADC in real time. The values
shown are up to ±8,388,608 counts, which represents a signed 24-bit number.
Pressing the Right button will prompt you to do so again to
confirm a reset of the zero level. If you have a 4-channel
Gecko, the date and time line will not be shown, with
channel O appearing at the bottom.
Another feature of this screen is the ability to view the STA/LTA ratio in real time. The value
at the end of each line is the ratio of the average signal in the short term divided by the
average signal in the long term. When nothing much is happening, this value will sit around
1.0, but a short burst of anomalous signal will increase number. This number may assist
you in determining at what level to set your STA/LTA trigger threshold.
Note: The STA/LTA value will only display if STA/LTA triggering is enabled.
2019-04-01 11:52:18
E: -0.0439408 mm/s
N: 0.0360011 mm/s
Z: -0.0011021 mm/s
3D 0.1234567 mm/s
max 11.1234567 mm/s
1D 80.0360011 dB
max 101.0011021 dB
2019-04-01 11:52:20
E: -2,726 0.6
N: 4,326 0.8
Z: -356 1.2

6
The Main Menu
Pressing the Menu button from the home screen will show you a list of actions and settings
for managing your recorder. The main menu includes some or all of the following items:
Main Menu
Unmount SD card
> Station Info
Sample Rate
Channels to Store
Channels to Send
3D sensor
1D sensor
Input Amplifier
Trigger & Alarm
Telemetry
Settings File
Start Calibration
If you change any settings, they are applied once you exit to the home screen. The settings
are also automatically saved to the recorder’s configuration file.
Unmount SD card
In version 3.2 of the Gecko firmware we removed the option to stop and start data
sampling. Data is being sampled at all times, whether an SD card is present or not, because
data can be telemetered without an SD card. If there is no SD card, backfilling of unsent
data will not be possible.
Before you remove the SD card, you should unmount the SD card so that the system does
not try to write data to the SD card while it is being removed, an action that can corrupt the
file, file system, or SD card.
When you insert an SD card, it will automatically be mounted.