Table of Contents
Advertisement
Quick Links
Advertisement
Table of Contents
Summary of Contents for Loggerhead LHC
- Page 1 LHC – Loggerhead Cyclops Camera www.loggerhead.com Updated 18 May 2017...
- Page 2 Overview LHC consists of an HD video recorder that is controlled by a scientific-quality audio recorder (LS1) that also triggers video recordings. Audio is collected by a hydrophone that is external to the recorder. LHC is housed in a PVC tube and is depth rated to 500 m. Each board has its own microSD flash card. Typically, the larger card (e.g. 128 GB) is used with the video camera and the smaller card (e.g. 64 GB) is used with the LS1 audio board. The audio board records at 44.1 kHz. The video camera does not record audio. LS1 Audio interface board. The memory card should be placed in slot 1. Camera with green power LED illuminated.
- Page 3 Hydrophone The hydrophone is an HTI-96-min. You will receive a separate calibration sheet for the hydrophone. The default system gain is full scale = 0.79 Vpeak (i.e. +2 dB gain). For example, hydrophone with sensitivity of -170 dBV/uPa will have a clip level of 168 dB. Batteries LHC uses D-cell batteries, which power both the audio recorder and camera. The expected deployment duration will be calculated and shown on the display assuming that 12 D-cell batteries have been installed. Recording Settings Settings are programmed on the audio board through three buttons on the front. Press ENTER (bottom button) to scroll through menu choices. The Up and Down buttons can be used to change the setting. Menu Function UP+DN->Rec Press UP and DOWN buttons simultaneously to start recording Rec Record duration in seconds Slp Sleep duration (seconds) Year Real-time clock Year Month Real-time clock Month Day Real-time clock Day Hour Real-time clock Hour Minute Real-time clock Minute Second Real-time clock Second Mode Norm: Normal record mode. Camera will alternate recording and sleeping continuously. Diel: Camera will alternate recording and sleeping during a time window. Start HH Hour of day to start recording in diel mode. Start MM Minute of day to start recording in diel mode.
- Page 4 Diel Mode: Diel mode is the same as normal mode with respect to the duty cycling of recording, but recordings are only made between the Start time and End time. For example, to record at dusk from 1600-1800 hours on a 5 If the record duration is longer than 5 minute duty cycle, the settings minutes (300 s), the video camera will split would be: the recording into multiple contiguous 5 Rec=60s minute long video files. The audio files will Slp=240s be the length specified by Rec. Start HH=16 Start MM=00 End HH=18 End MM=0 Setting Time on Video Camera The date and time can be set on the video camera by creating a file called time.txt and placing it on the microSD card that is put in the camera. If this file is present, the timestamp on the camera will be updated when the camera is powered on. Time.txt file contents DATE="YYYY/MM/DD” TIME="HH:MM" Example: DATE="2016/01/20" TIME="13:00" After the card is in the camera, switch on power to the LHC, and manually start the camera at the time corresponding to the time in the time.txt file. For example, for the file above, the camera would be turned on at 1300 hours on 20 January 2016. Preparing to Record 1. Insert 12 D-cell batteries. 2. The video camera should have no LEDs illuminated (it should be off). The blank microSD card should be inserted.
- Page 5 3. To start, switch the LS1 board power switch to ON. This turns on power to the audio board, which then controls when the video board records. The camera should turn on (green LED illuminated) after the LS1 initializes the microSD card(s). 4. Change the settings to the desired recording schedule using the push buttons. 5. Start recording by pressing UP and DOWN buttons simultaneously. 6. Wait to make sure the first recording starts properly. The display will go off on the LS1 board, and a red LED on the camera will flash. 7. Make sure o-rings are lubricated with silicone. Insert into tube and rotate to screw on the lid. The lid should be tightened hand tight. DO NOT USE A STRAP WRENCH TO CLOSE THE HOUSING. LEDS What to expect: After switching the power switch, the orange LED on the audio board will illuminate. If the first recording is more than one minute in the future, the board will go to sleep. The camera will power on about 10 s before the first recording. Once the camera recording is triggered, the red LED will flash slowly during recording. When the camera is commanded to power down, the red LED will flash quickly, and then all camera LEDs will turn off. Mounting Bracket LHC comes with a u-bolt mounting bracket that can be fit around the tube. The mount includes a quick release mount for a tripod. Files Video Remove the microSD card from the camera board. Push the card in to eject it. Insert the card into a computer and view the files directly on the PC. Note that Macintosh computers may leave extra files on the card, which may interfere with proper startup. After downloading the files. Delete the files before starting the next recording session. Audio Remove the microSD card by pulling it out (there is no spring eject on the audio board). Audio files are stored as standard .wav files. The start date and time of the file is stored in the filename.
- Page 6 Manual Camera Override The camera can be turned off by holding down the button on the camera board for 5 seconds. Housing Lens The housing lens is made of acrylic. If it becomes scratched, you can polish it with an acrylic polishing kit. If you are in the field without a kit, toothpaste may work.
Need help?
Do you have a question about the LHC and is the answer not in the manual?
Questions and answers