HOBO Pendant Temperature/Light Data Logger (UA-002
Contents
1. fastest logging rate of one second will deplete the battery in as little as two weeks Replacing the Battery Before you begin You will need a small Philips head screwdriver and silicone based O ring grease such as Parker Super O Lube to complete these steps no petroleum based lubricants The logger should be wiped clean and dried completely before opening it To replace the battery 1 l O ring on end cap with desiccant tucked inside Avoid electrostatic discharge while handling the logger and internal circuit board ground yourself by touching an unpainted metal surface Hold the circuit board by its edges and avoid touching electronics Working on a clean dry surface remove the two screws that secure the end cap to the case and remove the cap Examine the desiccant pack that is tucked into the cap If the desiccant is not bright blue put the desiccant pack in a warm dry place until the blue color is restored Or for faster drying the desiccant can be dried for two hours ina 70 C 160 F oven Gently tap the case to loosen the circuit board and remove it from the case en 4 Dn Battery Ny y 7 j K p A Z board Logger case Carefully push the battery out of the holder with a small nonmetallic blunt instrument Insert a new battery positive side facing up Return the circuit board and label to the case carefully aligning the circuit board with the grooves in the2. case so that the battery faces the ridged side of the case 10B0 Data Loggers 1 800 LOGGERS 564 4377 508 759 9500 www onsetcomp com loggerhelp onsetcomp com HOBO Pendant Temperature Light Data Logger UA 002 xx Manual 10 11 12 13 14 15 Remove the O ring from the end cap Use the thumb and finger of one hand to hold the cap from the top and bottom and use the thumb and fingers on your other hand to slide the O ring to form a loop as shown Use this loop to roll the O ring off the cap Inspect the O ring for cracks or cuts and replace it if any are detected the O ring is included in the Pendant replacement parts kit UA PARTSKIT Using your fingers not cloth or paper spread a small dot of silicone based grease on the O ring just enough to moisten it all the way around and making sure that the entire O ring surface is completely coated with grease As you work the grease into the O ring make sure there is no grit or debris on the O ring Place the O ring back on the end cap making sure it is fully seated and level in the groove Make sure the O ring is not pinched or twisted and that no dirt lint hair or any debris is trapped on the O ring This is necessary to maintain a waterproof seal Very slightly grease the inside rim of the case especially around the screw holes with the silicone grease just enough to moisten the inside edges without touching any circuitry Make sure that there is
3. no excess lubricant that could get onto the logger electronics or label Make sure there is no debris on this surface Check that the desiccant pack is tucked into the cap Carefully push the end cap into the lubricated case until the screw holes are aligned Visually check that the O ring forms a uniform seal all around Re fasten the screws Tighten the screws until you feel them hit the bottom of the screw holes but not so tight that they distort the clear housing P A Do not cut open incinerate heat above 85 C 185 F or recharge the lithium battery The battery may explode if the logger is exposed to extreme heat or conditions that could damage or destroy the battery case Do not dispose of the logger or battery in fire Do not expose the contents of the battery to water Dispose of the battery according to local regulations for lithium batteries 2009 2014 Onset Computer Corporation All rights reserved Onset HOBO Pendant and HOBOware are trademarks or registered trademarks of Onset Computer Corporation All other trademarks are the property of their respective companies Patent 6 826 664 9556 K MAN UA 002
4. or place it next to a strong magnet and remove it after three seconds Important The logger will not launch if the base station is in the coupler 4 Verify that the logger s light is blinking at least every four seconds Sample and Event Logging The logger can record two types of data samples and internal logger events Samples are the measurements recorded at each logging interval for example temperature every minute Events are independent occurrences triggered by a logger activity such as Bad Battery or Host Connected Events help you determine what was happening while the logger was logging Operation A light LED on the front of the logger confirms logger operation The following table explains when the light blinks during logger operation When The light The logger is logging Blinks once every one to four seconds the shorter the logging interval the faster the light blinks blinks when logging a sample The logger is awaiting a start Blinks once every eight seconds until because it was configured to logging begins start logging At Interval On Date Time or Using Coupler 1 800 LOGGERS HOBO Pendant Temperature Light Data Logger UA 002 xx Manual Light Measurement The logger measures light intensity in units of lumens per square foot US or lux SI The light sensor in the Pendant logger measures a much broader spectrum of light wavelengths than are visible to the human eye Plot D shows
5. HOBO Pendant Temperature Light Data Logger UA 002 xx Manual The HOBO Pendant Temperature Light Data Logger is a waterproof two channel logger with 10 bit resolution and can record up to approximately 3 500 8K model or 28 000 64K model combined temperature and light readings or internal logger events The logger uses a coupler and optical base station with USB interface for launching and data readout by a computer Specifications Measurement Range Temperature 20 to 70 C 4 to 158 F Light O to 320 000 lux 0 to 30 000 lumens ft Accuracy Temperature 0 53 C from 0 to 50 C 0 95 F from 32 to 122 F see Plot A Light intensity Designed for measurement of relative light levels see Plot D for light wavelength response HOBO Pendant Resolution Temperature 0 14 C at 25 C 0 25 F at 77 F see Plot A Temperature Light Drift Less than 0 1 C year 0 2 F year Data Logger Response Time Airflow of 2 m s 4 4 mph 10 minutes typical to 90 Water 5 minutes typical to 90 Models UA 002 08 UA 002 64 Time Accuracy 1 minute per month at 25 C 77 F see Plot B Operating Range In water ice 20 to 50 C 4 to 122 F Required Items In air 20 to 70 C 4 to 158 F e HOBOware 2 x or later Water Depth Rating 30 m from 20 to 20 C 100 ft from 4 to 68 F see Plot C e USB cable included with software NIST Traceable Available for temperature only at additional charge temperature range Ce
6. events to be logged It can also launch the logger prematurely if it was waiting for a trigger start Note Static electricity may cause the logger to stop logging To avoid electrostatic discharge transport the logger in an anti static bag and ground yourself by touching an unpainted metal surface before handling the logger For more information search for static discharge in the FAQ section on onsetcomp com Periodically inspect the desiccant and dry it if it is not bright blue The desiccant pack is located in the cap of the logger To dry the desiccant remove the desiccant pack from the cap and leave the pack in a warm dry location until the bright blue color is restored Refer to the Battery section for instructions on removing and replacing the logger cap Temperature Range Desiccant Maintenance Schedule Less than 30 C 86 F Approximately once per year 30 to 40 C 86 to Approximately every six months 104 F Over 40 C 104 F Approximately every three months www onsetcomp com Battery The logger requires one 3 Volt CR 2032 lithium battery Battery life varies based on the temperature and the frequency at which the logger is recording data the logging interval A new battery typically lasts one year with logging intervals greater than one minute Deployments in extremely cold or hot temperatures or logging intervals faster than one minute may significantly reduce battery life Continuous logging at the
7. huttle 3 Ifyou are using the HOBO Waterproof Shuttle briefly press the coupler lever to put the shuttle into base station mode 4 Ifthe logger has never been connected to the computer before it may take a few seconds for the new hardware to be detected 2 www onsetcomp com 5 Use the logger software to set up the alarms launch and read out the logger You can read out the logger or check its status while it continues to log stop it manually with the software or let it record data until the memory is full Refer to the software user s guide for complete details on launching reading out and viewing data from the logger Important Do not cover the optical communication window in the logger shown in diagram above with a label or sticker as that may interfere with the communications with the base station or shuttle Triggered Start This logger can be configured to start at your command using the magnet in the coupler to trigger a start 1 Use HOBOware to launch the logger with Using Coupler selected Remove the logger from the coupler 2 Bring the logger and an empty coupler or strong magnet to the deployment location Important Any magnet can trigger a start This can be helpful but it can also cause a premature start Keep the logger away from strong magnetic fields until you are ready to begin logging 3 When you are ready for the logger to start logging insert the logger into the empty coupler
8. omputer The HOBO Pendant logger requires either of the following to connect to the computer e Pendant Optic USB Base Station amp Coupler BASE U 1 HOBOware 2 1 or later OR e Optic USB Base Station BASE U 4 or HOBO Waterproof Shuttle U DTW 1 coupler COUPLER2A HOBOware 2 2 or later If possible avoid connecting at temperatures below 0 C 32 F or above 50 C 122 F 1 800 LOGGERS HOBO Pendant Temperature Light Data Logger UA 002 xx Manual Pendant Eye Response 0 200 400 600 800 1000 1200 1400 Wavelength nm Plot D 1 Plug the USB connector on the base station into an available USB port on your computer 2 Insert the logger and the base station into the coupler as shown in the following diagrams For BASE U 1 make sure that the logger is inserted in the end of the coupler that has the magnet and that the ridges on the base station and logger are aligned with the grooves in the coupler BASE U 1 amp COUPLER Magnet S LOGGER For BASE U 4 or the HOBO Waterproof Shuttle firmly insert the optical end of the base station into the D shaped end of the coupler and make sure that the ridge on the logger is aligned with the groove in the coupler To BASE U 4 or HOBO Waterproof Shuttle mia Optical IOGCER N communication window Ridge side down COUPLER2 A Coupler lever for use with HOBO Waterproof S
9. rtification 20 to 70 C 4 to 158 F e Pendant Optic USB Base Station amp Coupler BASE U 1 Battery Life 1 year typical use e Optic USB Base Station BASE U 4 or HOBO Waterproof Shuttle Memory UA 002 08 8K bytes approximately 3 5K combined temperature and light readings or events U DTW 1 amp Coupler UA 002 64 64K bytes approximately 28K combined temperature and light COUPLER2 A readings or events Materials Polypropylene case stainless steel screws Buna N o ring Weight 18 g 0 6 oz Dimensions 58 x 33 x 23 mm 2 3 x 1 3 x 0 9 inches C The CE Marking identifies this product as complying with all relevant directives in the European Union EU 25 0 _ 0 0 O _ 5 amp 5 25 0 2 amp x a ry 8 50 0 v 75 0 100 0 20 2 5 25 47 5 70 Temperature C Temperature C Plot A Plot B 9556 K MAN UA 002 Specifications continued 40 30 E 20 Waterproof a range 10 0 20 0 20 40 60 Temperature C Plot C Deployment Mounting The Light Sensor response is roughly cosine dependent with the angle from vertical Therefore whether outdoors or underwater the logger must be mounted horizontally so that the sensor is pointing straight up towards the sky Light Sensor Attach the logger to a flat surface using glue a tie or a rubber band making sure that the sensor is pointing up light sensor ground Connecting the Logger to a C
10. that the logger s response extends farther into ultraviolet and infrared wavelengths than the eye s response This means the logger is useful for sensing wavelengths not visible to the eye but it also may mean that the logger s readings will not correspond exactly to measurements made with a device having different spectral sensitivity The light sensor is most useful for determining relative changes rather than absolute values of intensity The logger has a very wide dynamic range of light sensitivity extending from complete darkness to somewhat beyond full daylight The resolution steps are smaller at low light levels than at high light levels to allow useful measurements across this broad range of intensities Intensity readings are maximum for light hitting the sensor directly on axis and are reduced for light coming in at an angle Readings can also be reduced by abrasions or dirt on the case above the light sensor Protecting the Logger The logger can be damaged if the water depth rating is exceeded The depth rating is approximately 30 m 100 ft at temperatures below 20 C 68 F but is less in warmer water Refer to Plot C for details Do not store the logger in the coupler Remove the logger from the coupler when you are not using it When the logger is in the coupler or near a magnet it consumes more power and will drain the battery prematurely Keep the logger away from magnets Being near a magnet can cause false coupler
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