1086-K MAN Optt
Contents
1. plastic polish Seeing if the alarm has been tripped The Optic StowAway Temp has two LEDs The green LED blinks during use if it has not recorded out of range conditions See the soft ware manual for how to set the alarm If it has recorded out of range conditions the red LED will blink When io the Optic StowAway Temp is full it will no longer blink s0 fom either LED AAAA AALL N Time accuracy At room temperature the logger s idea of time can vary at an 10 GAL NZ oA IN from the actual time by as much as one hour per year 100 ppm There is an additional temperature effect 40 20 0 20 40 60 80 page 1 Temperature C time base error ippen ie a al Shown in PIot A Depth rated to 100 feet We have tested the polycarbonate case at depths to 400 ft without problems The rated depth of 100 ft is a combination of a lack of extensive field experience and our natural conservatism Operating temperature range 35 C to 75 C in air The Optic StowAway Temp will operate properly in air temperatures ranging from 35 C to 5 C and water temperatures ranging from 0 C to 30 C For temperatures above the highest value in its measurement range it will read its highest value and for temperatures below the lowest value In its range it will read its lowest value Continuous exposure to temperatures substantially above room temperature will reduce the battery life of the Optic StowAway Temp The operating2. the green blinking LED Waiting for trigger Weak blink every six seconds Waiting out delay Weak blink every four seconds Logging Bright blink every measurement and weak every two seconds between measurements If the Optic StowAway Temp is in multiple sampling mode it will blink at each measurement not each time data Is recorded Alarm A logger is out of range if it has recorded a value that is above the high alarm limit or below the low alarm limit The red LED will blink during the duration of the deployment instead of the green LED page 3 Details of the Optic StowAway Temp logger Sealed logger designed for field operation The Optic StowAway Temp data logger is completely sealed It communicates optically so it can be used in wet or dirty locations or be completely submerged The Optic StowAway Temp logger can be launched and read out directly to a host computer using the Optic Base Station and an interface cable Individual calibration All StowAways except the water temperature range Optic StowAway Temp use thermistors with a 0 2 C interchangeability in the range 0 C to 5 C This error rises at lower or higher temperatures The water temperature range of the Optic StowAway Temp WTA 5 C 37 C uses a thermistor that has 0 1 C interchangeability Other factors that limit the logger s accuracy are imperfections resistor variations and A D nonlinearities and quantization error difference between tem
3. 508 759 9100 E mail loggerhel p onsetcomp com Internet http Awww onsetcomp com D 1086 K MAN OPTT Optic StowAway Temp User s Manual Range k3 ok ld out compute a al Tel 1 800 LOGGERS 1 800 564 4377 508 759 9500 Fax 508 759 9100 Gompiier Saronic sales onsetcomp com www onsetcomp com Thank you for purchasing an Optic StowAway Temp logger The minimum optic logging system is made of these components the Optic StowAway Temp logger the Optic Coupler and the Optic Base Station which connect the logger to the host computer and the logger software Recommended software BoxCar 3 6 or any version of BoxCar Pro By adding the Optic Shuttle you can leave your Optic StowAway Temp in the field up to six years Launching your Optic StowAway Temp Connect the Optic Base Station to the host computer using the appropriate Interface cable CABLE PC 3 5 for a PC and CABLE MAC HOBO for a Macintosh Then slide the Optic StowAway Temp into the Optic Coupler on the Optic Base Station The magnet end of the coupler must be on the logger side as pictured below out Optic ce on Optic at R nge Optic computer corporation Base Station computer corporation Coupler i eo 5 fe Triggered launch and the Optic StowAway Temp The Optic StowAway Temp has an optional triggered launch Launch your logger choosing the triggered launch option After you have launched the l
4. The coffee mug logger test The freezing point of water is 0 C 32 F with only a tiny dependence on pressure and the salt levels found in normal tap water You can use this in formation to test the accuracy of your Optic StowAway Temp logger Put crushed ice and water in an insulated container and completely submerge the logger in the ice water with the sensor end down Place the container in a refrigerator to minimize temperature gradients Leave it in for fifteen minutes while logging to be sure the Optic StowAway reaches equilibrium Offload the data and blow up the end of your plot to check the logger s accu racy The actual temperature will be above 0 C though less than 0 1 C if you do everything right This isn t really a coffee mug test because the logger won t fit into a stan dard one Four minute response time in water Plot E shows that the temperature reached 90 of the step change in 20 about four minutes 02 00 04 00 06 00 08 00 10 00 12 00 14 00 O9Mar98 10 02 00 TEST S N 107070 1996 2002 Onset Computer Corporation Trademarks Onset HOBO StowAway StowAway TidbiT Optic Shuttle Optic Base Station Optic Coupler TidbiT Coupler and BoxCar are trademarks of Onset Computer Corporation Onset Computer Corporation 470 MacArthur Blvd Bourne MA 02532 Mailing PO Box 3450 Pocasset MA 02559 3450 8 00 AM to 5 00 PM EST 1 800 LOGGERS 1 800 564 4377 Tel 508 759 9500 F ax
5. nute or longer intervals no multiple sampling and one offload per deployment Sampling intervals shorter than one minute and or extended storage deployment above 27 C will significantly reduce battery life Multiple sampling will also substantially reduce battery life Factory replaceable battery The battery is not user replaceable the case must be destroyed to open it Factory replacement of the battery with the unavoidable case replacement IS available Call Onset or an Onset Authorized Dealer for details page 4 Temperature accuracy and resolution The Optic StowAway Temp logger s accuracy and resolution specifica tions are given in plot B and plot C The logger s accuracy specification is it s maximum measurement error including the effects of thermistor error resistor value errors and quantization error In most cases the logger s actual accuracy is better than the specified value The logger s resolution is the difference between temperature steps Plot B Graph 4024 A Temperature Accuracy Model WTA 5 C to 37 C Wi Plot C Graph 4027 B Temperature Accuracy Model WTA 39 C to 75 C 40 4 32 68 104 140 176 212 40 4 Temperature F Accuracy Resolution F Accuracy Resolution F 32 68 104 140 176 212 Temperature F The blinking LEDs The Optic StowAway Temp s LEDs tell you exactly what the logger is doing Until an alarm condition has been met all indications will be shown by
6. ogger with the triggered launch option selected remove the logger from the Optic Coupler When you want to trigger the logger to launch place it in the Optic Coupler again and it will launch when it is removed An LED will flash rapidly to signal the launch has begun You don t need to have the Optic Base Station to trigger the launch a magnet in the Optic Coupler is doing the work The magnet is in the outrigger on the side of the Optic Coupler You could also trigger the logger with any strong magnet placed near the top of the logger over the O in Onset Protect from magnetic fields when logging Do not expose the Optic StowAway Temp to the combination of a magnetic field and a strong light source Such as direct sunlight at the same time This can activate the logger s IR communication circuit and stop it from logging Data recovery After you have launched the Optic StowAway Temp remove the logger from the Optic Coupler and deploy the logger At the end of the deployment either bring the logger back and reattach it to the Optic Base Station for readout or use the Optic Shuttle to readout the data in the field Be sure to keep your logger free from dirt and dust To clean your logger use only a non abrasive mild soap and warm water with a non scratching sponge or cloth Any scratches or abrasions on the optic logger s surface may impair communication For tougher cleaning jobs use a plastic polish such as Novus
7. perature steps Onset s proprietary test procedures effectively eliminates the resistor and A D errors leaving only the thermistor accuracy and quanti zation error and a small residual calibration error Differences between loggers The calibration process adjusts the measured values of individual loggers with the same temperature range This means that two loggers will not necessarily have the same step values so that two loggers exposed to the Same temperature may report different values Each logger however will be correct within its accuracy What is quantization error Ideally a logger would record a differ ent temperature for each temperature applied to it The Optic StowAway Temp can store only 255 different temperature values in its temperature range If you exposed the logger toa slowly rising temperature the logger would record a constant value and then with finite jump to a higher value recording that number of value for a while The difference be steps tween the steps is twice the quantiza tion error since a perfectly calibrated logger will never be more than half a step away from the actual value Ideal Logger with an infinite number of steps Logger Logger Temperature Actual Temperature page 2
8. range may be smaller than the sensing range on certain StowAway models due to battery s operational temperature limits If you are uncertain about your application please contact Onset Computer or your authorized Onset dealer to discuss it Notice To guarantee specified accuracy the Optic StowAway should not be used in condensing environments and water temperatures higher than 30 C 86 F for more than 8 weeks cumulatively Prolonged exposure will lead to measurement drift and eventual failure If your application tem peratures and environment are questionable based on the above statement please contact Onset or your authorized Onset dealer for more information Case Durability The Optic StowAway Temp s case is made of polycarbonate which should not be exposed to harsh chemicals especially any type of antifreeze or alcohol used in calibration baths 1 x 0 8 x 5 2 and 1 3 oz The shape of the Optic StowAway Temp was chosen to minimize its volume and for easy alignment between the logger and the other optic components The logger weighs 1 3 oz and has a slight positive buoyancy 90 second offload 8K version The Optic StowAway Temp communicates at 1200 baud Its cleverly optimized software allows a full 8K offload in only ninety seconds six minutes for a 32K Optic StowAway Temp Six year battery life The six year battery life is based on typical use of 20 three month deployments in water 2 C to 27 C with four mi
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