User`s Manual
Contents
1. ME Fast Response Sensors and Systems Precision Measurement Engineering Inc e www pme com User s Manual 2014 miniDOT Precision Measurement Engineering Inc 1 760 727 0300 www pme com Warranty 1 YEAR LIMITED WARRANTY ON miniDOT HARDWARE Precision Measurement Engineering Inc PME warrant that the miniDOT Logger shall be free of defects in workmanship and materials under normal use for a period of one year from the date of shipment This warranty is made only to the original purchaser In the event a miniDOT Logger covered by this warranty fails to operate according to our published specifications then return it freight pre paid to PME or an authorized Service Provider PME will repair the unit at no charge to the customer and bear the cost of return shipment Carefully pack all components as the customer is responsible for any freight damage This warranty does not apply to services or consumable expendable items such as batteries fuses and ropes required for general maintenance Equipment manufactured by other companies such as meteorology sensors solar panels etc are warranted only to the limit of the warranties provided by their original manufacturer PME makes no warranty either expressed or implied that the sensors will be operable after they are exposed to adverse environmental conditions such as bio fouling oil fouling freezing temperatures or others This warranty is void if in our opin2. www pme com Made in the USA 3 3 Electrical Connections and Controls Removal of the cover reveals the logger connections and controls shown below Logger Control Switch LED Light USB Connection The LED Light is a LED that can display either red or green light This is used to indicate different features described in Chapter 1 in this manual The Logger Control Switch controls the logger mode e Record When the switch is in this position the logger is recording measurements e Halt When the switch is in this position the logger is not recording and is sleeping at low power The USB Connection allows communication between the logger and an external host computer When connected the logger is in halt mode regardless of the Logger Control Switch position When disconnected the logger mode is controlled by the switch position The switch position may be changed while the USB is connected Precision Measurement Engineering Inc 20 760 727 0300 www pme com The Main Batteries 2 X AA on side opposite to pictured side above provide main power to the miniDOT Logger Note the positive terminal Batteries are described in Chapter 1 of this manual 3 4 Battery Replacement Be sure that the replacement battery is compatible with minIDOT PME recommends Energizer L91 AA size lithium batteries or Duracell AA size alkaline batteries http data energizer com PDEFs 91 pdf http ww2 duracell com media en US pdf g
3. com 2 4 miniDOTConcatenate Begin program operation by clicking on miniDOTConcatenate jar Software presents the screen shown below CE iclx LX PN f ME Fast Response Sensors and Systems Surface Elevation meters 0 00 Elevation Barometric Pressure Salinity ppt 10 00 Select DATA Folder none selected miniDOTConcatenate reads and concatenates the files recorded by the miniDOT Logger Software produces CAT txt in the same folder as selected for the data CAT txt contains all the original measurements and contains two additional statements of time and oxygen saturation To compute saturation software must know the air pressure and salinity It calculates air pressure based on elevation of the water surface above sea level or uses the barometric pressure you enter if Barometric Pressure is selected If Elevation is entered no compensation for weather induced barometric pressure variation is made Enter elevation or barometric pressure Enter water salinity Select the folder that contains the files recorded by miniDOT If miniDOTPlot is run directly from the miniDOT the program will suggest the folder located on the miniDOT You may accept this by clicking on Process or you may click on Select Data Folder to browse to your computer s hard drive If the number of measurments recorded is small say a few thousand these can conveniently be plotted directly from miniDOT storage However it is best to copy large
4. it to a host device via USB The miniDOT Logger will appear as a thumb drive Your temperature and oxygen concentration measurements together with a time stamp indicating the time the measurement was made are recorded in text files in the folder having the serial number of your miniDOT Logger These files can be copied onto any Windows or Mac host computer This Manual and other software is also recorded on the miniDOTLogger e miniDOTControl allows you to see the state of the logger as well as set the recording interval e miniDOTPlot allows you to see plots of the recorded measurements e miniDOTConcatenate gathers all the daily files into one CAT txt file Your miniDOT Logger will return to recording measurements after you disconnect the USB connection If you wish to stop recording switch the Recording Control Switch to the Halt position You may switch the Recording Control Switch at any time Follow these steps to start the deployment logging DO amp T once each 10 minutes 1 Open the miniDOT Logger by unscrewing the white housing from the black end cap it opens like a flashlight Remove the housing completely Inside you will see the circuit pictured below Logger Control Switch LED Light USB Connection Precision Measurement Engineering Inc 5 760 727 0300 www pme com 2 Switch the Logger Control Switch to the Record position The LED will flash green 5 times The miniDOT Logger will now record a measu
5. miniDOT If the 3 requirements are met then connect miniDOT to your device You should see the miniDOT green connection light come on and your device display a message about preparing USB storage When USB storage ready is shown use your file explorer program to move your data from the miniDOT onto you device Again it is highly recommended that you try this operation at your work station prior to depending upon this in the field Currently the associated miniDOT programs Control Plot and Concatenate are not supported by Android devices Precision Measurement Engineering Inc 13 760 727 0300 www pme com Chapter 2 Software 2 1 Overview and Software Installation The miniDOT arrives with these files e MiniDOTControl jar allows you to see the state of the logger as well as set the recording interval e MiniDOTPlot jar allows you to see plots of the recorded measurements e MiniDOTConcatenate jar gathers all the daily files into one CAT txt file e Manual pdf this manual These files are located on the root directory of the miniDOT PME suggests you leave these programs where they are on the miniDOT but you may copy them to any folder on your computer s hard drive MiniDOTControl miniDOTPlot and miniDOTConcatenate are Java language programs that require the host computer to have the Java Runtime Engine V1 7 JRE or later installed This engine is commonly required for internet applications and will likely alre
6. occasionally to a host having an internet connection The miniDOTControl program will automatically set time based on an internet time server Please refer to Chapter 2 for instructions on operating the miniDOTControl program File Information The miniDOT Logger software creates 1 file daily on miniDOT s internal SD card The number of measurements in each file will depend upon the sample interval Files are named by the time of the first measurement within the file based on the logger s internal clock and expressed in YYYY MM DD HHMMSSZ txt format For example a file having the first measurement on September 9 2014 at 17 39 00 UTC will be named 2014 09 09 173900Z txt Files can be uploaded from miniDOT by connecting miniDOT to a host computer and by using the host computer to copy paste the files from miniDOT to some host computer storage Each measurement within files has a time stamp The time stamp format is Unix Epoch 1970 the number of seconds that have passed since the first moment of 1970 This may be inconvenient in some cases If so the miniDOTConcatenate software not only concatenates all the measurement files but also adds more readable statements of the time stamp Please refer to Chapter 2 for instructions on operating the miniDOTConcatenate program miniDOT requires time and battery energy to work through the file directory on SD card to allocate new file space A few hundred files on SD is not a problem but as th
7. of the o ring When the pressure housing is screwed back on these drops become trapped inside the miniDOT Logger Be sure to carefully dry the o ring and adjacent surfaces especially underneath prior to closing the miniDOT Re lube the o ring at this time LED Indications The miniDOT Logger indicates its operation with its LED The table below presents LED indications Precision Measurement Engineering Inc 10 760 727 0300 www pme com LED Reason 1 Green Normal Presented immediately after new batteries are Flash installed Indicates that the CPU has started its program 1 Green Occurs at the time of sampling for sample intervals of 1 minute Flash or less 5 Green Normal Indicates that miniDOT is beginning to record Flashes measurements This indication appears in response to switching the Recording Control Switch to Record 5 Red Normal Indicates the miniDOT is ending recording of Flashes measurements This indication appears in response to switching the Recording Control Switch to Halt Continuously Normal Indicates the miniDOT is connected to a host device Green via USB Continuously SD card write error Try removing reinstalling batteries Flashing Red Contact PME Verifying Calibration You may from time to time want to verify the calibration of your miniDOT Do this by placing the miniDOT in a black 5 gallon bucket containing 4 gallons of fresh The picture below shows a white bucket so that miniDOTs a
8. ady be installed on the host computer You can test this by running miniDOTPlot If this program displays its graphical user interface then the JRE is installed If not then the JRE can be downloaded via internet from http www java com en download windows_xpi jsp At this time miniDOT Logger is supported on Windows operating systems but may also operate on Macintosh and perhaps Linux 2 2 miniDOTControl Begin program operation by clicking on miniDOTControl jar Software presents the screen shown below Precision Measurement Engineering Inc 14 760 727 0300 www pme com ioix LX AN f ME Fast Response Sensors snd Systems Logger Status k Connect The miniDOT must be connected to USB at this time When correctly connected the miniDOT LED will display a constant green light Click the Connect button The software will contact the logger If the connection is successful the button will turn green and display Connected The Serial Number and other parameters will be filled in from information taken from the miniDOT If the host computer is connected to the internet the current difference between an internet time server s time and the miniDOT Logger internal clock will be displayed And if more than a week has passed since time was last set the miniDOT clock will be set and check mark icon will appear If the host computer is not connected to the internet no time services will occur The current miniDOT Logger
9. ariation is made Enter elevation or barometric pressure Enter water salinity Select the folder that contains the files recorded by miniDOT If miniDOTPlot is run directly from the miniDOT the program will suggest the folder located on the miniDOT SD card You may accept this by clicking on Process or you may click on Select Data Folder to browse to your computer s hard drive If the number of measurements recorded is small say a few thousand these can conveniently be plotted directly from miniDOT storage However it is best to copy large measurement sets to the host computer and select them there since file access to miniDOT is slow miniDOT measurement folders must NOT contain any files besides those miniDOT records and the CAT txt file Press Plot to begin plotting Precision Measurement Engineering Inc 16 760 727 0300 www pme com The software reads all miniDOT Logger data files in the selected folder It concatenates these and presents the plot shown below miniDOT Logger Measurements 7392 746840 1 0 2 5 3 9 100 8 8 78 t90 M lon 8 74 o 80 8 61 araa A 70 wa gt 8 5 26 2 2 25 amp a a t60 Q 6 lang 8 8 4 D D at 5 8 3 3 21 so OSS jL Oo he 4 FALSI lt O82 8 t4o p04 T 24 pico 8 14 D t30 3 LO 8 0 7 gt 0 75 E 20 0 P 7 9 0 50 78 gt gt 10 0 1 0 25 m 0 0 0 0 00 10 Sep 11 Sep Local Time Temperatu
10. e number of files grows large into the thousands miniDOT may suffer decreased battery life or other performance problems Please at the earliest convenient time copy recorded files to a host computer and delete them from miniDOT Also do not use miniDOT to store files unrelated to miniDOT operation Precision Measurement Engineering Inc 7 760 727 0300 www pme com Cleaning the Sensing Foil The sensor can be cleaned at regular intervals depending on the fouling condition at the site The cleaning procedure of the sensor spots should be done with caution so that the protective coating is not removed If the fouling is calcareous it can normally be dissolved with household vinegar If the marine growth remains then use Q tips to gently wipe it off after it has been softened by soaking in vinegar or perhaps dilute HCI After cleaning the sensor it should be rinsed well in clean tap water before storing or reuse Do not use other organic solvents such as acetone chloroform toluene since these and others will damage the foil The sensor membrane can also be cleaned using a 3 H202 solution or rinsing it with ethanol The plastic case of the miniIDOT Logger can be gently scrubbed AA Alkaline Battery Life Alkaline batteries will give somewhat less performance than lithium especially at low temperatures Alkaline batteries are superior to lithium in one way you can guess how much battery life remains from measurements of the batte
11. eep the black end covered with the cap supplied by PME If the cap is lost cover the end with aluminum foil There may be a calibration effect of ambient lighting so attempt to keep ambient light from reaching the sensing foil as much as possible Java miniDOT programs depend on Java and require Java 1 7 or higher Update Java at https java com en download index jsp Precision Measurement Engineering Inc 12 760 727 0300 www pme com Upload Files to an Android device It is possible to transfer your measurement files from miniDOT to your android device This operation has 3 prerequisites 1 An Android device equipped with USB On The Go OTG OTG is a feature on most modern Android devices that allows them to act as a USB host OTG was introduced with Android version 3 1 and should be a useable feature on most devices It is still possible that your device doesn t support OTG Please test your device with a miniDOT prior to attempting to upload while in the field 2 A USB OTG cable This is essentially an adapter with a micro USB connector on one end that connects to your Android device and a standard A type USB plug on the other The cable supplied with miniDOT connects to this end 3 A File Explorer app downloaded on your Android device These types of apps assist with being able to view and move files from device to device ES File Explorer is a free app available on the Google app store and is recommended for use with
12. especially before any long months measurement deployment Precision Measurement Engineering Inc 8 760 727 0300 www pme com Monitor battery terminal voltage You cannot tell from terminal voltage of a lithium battery how long the battery will last but you can tell if it will die sometime really soon The Low Drain Performance plot below gives an estimate of terminal voltage for both lithium and alkaline batteries Your measured voltage will be 2X what is shown below since there are two batteries in series within the miniDOT You can operate batteries down to about 2 4 Volts for two in series 1 2 Volts on the graph below Measure the series voltage as shown in the picture below Your batteries are dead if this measurement is less than 2 4 Volts You may also use alkaline AA batteries such as Duracell Coppertop They will not last nearly as long especially at low temperatures but will likely be adequate for several weeks at 10 minute interval When replacing batteries use only fresh batteries Don t mix battery types If one battery differs in type or charge level from the other and the miniDOT runs them to full discharge one battery may leak Err on the side of caution when planning your deployment The recommended battery is Energizer L91 See this link for information including performance at low temperatures http data energizer com PDFs 191 pdf The figure below gives a very general idea of terminal voltage vs lifeti
13. ion the miniDOT Logger has been damaged by accident mishandled altered or repaired by the customer where such treatment has affected its performance or reliability In the event of such treatment by the customer costs for repairs plus two way freight costs no COD shipments will be accepted will be borne by the customer In such cases an estimate will be submitted for approval before repair work is started Items found to be defective should be returned to PME carefully packed as the customer will be responsible for freight damage Incidental or consequential damages or costs incurred as a result of the product malfunction are not the responsibility of PME For all warranty or non warranty returns please obtain complete and submit a RMA to PME This RMA form may be obtained at http Awww pme com HTML 20Docs RMAform html After submission of this form then PME will respond with a RMA number Please place this number on all shipments and related communications Precision Measurement Engineering Inc 2 760 727 0300 www pme com Safety Information BURSTING HAZARD Should water enter the miniDOT Logger and come into contact with the enclosed batteries the batteries may generate gas causing the internal pressure to increase This gas will likely exit via the same location where the water entered but not necessarily The miniDOT Logger is designed to release internal pressure as the end cap is unscrewed prior to the disengagemen
14. ired to open the logger each time measurements are transferred to the host computer This chapter describes the logger internal features 3 2 Opening and Closing the Logger The logger circuitry is contained in a waterproof housing that must be opened The housing is opened by unscrewing the white pressure housing from the black end cap in a way similar to the opening of a flashlight Turn the pressure housing counter clockwise relative to black end cap Close by reversing this procedure after being sure that the o ring is free from debris Lube o ring occasionally with grease intended for buna N o ring material Please attempt to handle the miniDOT only by the aluminum chassis without touching the circuit card When closing the miniDOT inspect the o ring and interior of the white cylinder for debris lube the o ring and screw the white cylinder onto the black end cap until the cylinder just touches the end cap Do not tighten miniDOT tends to get a little tighter during depolyment If you can not open miniDOT by yourself find another person with strong hands This person should grip the black end cap while the other person turns the white cylinder Caution Do NOT remove the stainless screws in the black end cap If this is done the miniDOT will be permanently damaged and must be returned to be repaired Precision Measurement Engineering Inc 19 760 727 0300 www pme com PME Fast Response Sensors and Systems miniDOT Logger
15. me Service life in hours is incorrect since miniDOT draws far less than 50 mA continuously but the general shape of the voltage vs time gives an estimate of life remaining This plot is taken from the manufacturer s specification The plot is for a single battery Double the voltages shown to give the terminal voltage as measured in the picture above miniDOT halts operation at a total of 2 4 Volts Precision Measurement Engineering Inc 9 760 727 0300 www pme com Low Drain Performance 50mA Continuous 21 C AA Lithium AA Alkaline 1 6 gt 1 4 O 1 2 Co f S 1 0 gt 0 8 0 15 30 45 60 75 Service hours Coin Cell Battery Life The miniDOT Logger uses a coin cell for backup of the clock when the power is switched off This coin cell will supply many years of clock operation Should the coin cell discharge it must be replaced by PME Contact PME Recalibration The miniDOT Logger will maintain its calibration without the necessity of adjustment by the user Loggers should be returned to PME for recalibration We suggest that this be done every 2 million samples O Ring and Seal When the cover is screwed on it passes along the o ring located in the end cap several revolutions Keep this o ring lightly lubricated with silicone grease or oil compatible with buna N o ring material When the miniDOT Logger is opened after deployment a small number of water drops are deposited on the inner surface
16. measurement sets to the host computer and select them there since file access to miniDOT is slow miniDOT measurement folders must NOT contain any files besides those miniDOT records and the CAT txt file Press Concatenate to begin concatenating files and create the CAT txt file The CAT txt file will resemble the following Precision Measurement Engineering Inc 18 760 727 0300 www pme com 2 Sensor 7392 0002 3 Concatenation Date 2014Jun30 10 20 40 PDT 5 DO concentration compensated for salinity 0 0 ppt 6 Saturation computed at elevation 0 0 meter Unix Timestamp UTC _Date_ amp _ Time Pacific Standard Time Battery Second none none Volt 1402942957 2014 06 16 18 22 37 2014 06 16 11 22 37 3 310000 1402942959 2014 06 16 18 22 39 2014 06 16 11 22 39 3 320000 1402942961 2014 06 16 18 22 41 2014 06 16 11 22 41 3 320000 1402942963 2014 06 16 18 22 43 2014 06 16 11 22 43 3 320000 140279427945 2N14 NF 14 18 27 45 2N14 NA 1h 11 77 45 2 22NNANn End miniDOTConcatenate by closing the window Chapter 3 miniDOT Logger 3 1 Overview All of the miniDOT Logger measurements pass from the sensors into files on the SD card miniDOT contains Files are transferred to a host computer via USB connection where miniDOT appears as a thumb drive Measurements may be plotted by miniDOTPlot and files concatenated by miniDOTConcatenate The miniDOT Logger itself is controlled by miniDOTControl Customers are requ
17. rding after USB disconnection 11 Disconnect the miniDOT Logger from the USB connection 12 Inspect the o ring seal for debris 13 Close the miniDOT Logger by screwing the white housing back onto the black end cap x 6 x Remove the batteries if storing the miniDOT Logger for extended periods 1 2 A Few Details The previous section gives instructions for sampling at 10 minute intervals However there are a few additional details that will enhance use of the miniDOT Logger Precision Measurement Engineering Inc 6 760 727 0300 www pme com Recording Interval The miniDOT Logger measures and records time battery voltage temperature dissolved oxygen concentration and measurement quality at equal time intervals The default time interval is 10 minutes However it is also possible to instruct the miniDOT Logger to record at different intervals This is accomplished by running the miniDOTControl jar program supplied with the miniDOT Recording intervals must be 1 or more minutes and must be less than or equal to 60 minutes Intervals outside this range will be rejected by miniDOTControl Contact PME for other recording intervals Please refer to Chapter 2 for instructions on operating the miniDOTControl program Time All miniDOT times are UTC formerly known as Greenwich mean time GMT The miniDOT Logger internal clock will drift in the lt 10 ppm range lt about 30 seconds month so you should plan to connect it
18. re Dissolved Oxygen DO Sat Q Battery You may zoom this plot by drawing a square from upper left to lower right click and hold left mouse button that defines the zoom region To zoom completely out attempt to draw a square from lower right to upper left Right click on the plot for options such as copy and print The plot can be scrolled with the mouse while the Control key is held depressed Copies of the plot can be obtained by right clicking on the plot and selecting Copy from the pop up menu Different DATA Folders can be selected during one session of the program In this case the software produces multiple plots Unfortunately the plots are presented exactly on top of each other and so when a new plot appears it is not obvious that the old plot is still there Itis Just move the new plot to see it The software can be re run at any time If an already processed DATA Folder is selected the software simply reads the miniDOT Logger measurement files again End miniDOTPlot by closing the window Special note plotting of sample sets of more than 200K samples may consume all memory available to the JRE miniDOTPIot will present a partial plot and freeze in this case A simple solution is to separate the files into multiple folders and plot each folder individually A special miniDOTPIot that sub samples can be provided by PME Please contact PME in this case Precision Measurement Engineering Inc 17 760 727 0300 www pme
19. re more easily seen The miniDOT sensor end black is heavy and the miniDOT will tend to flip so that this end is down Prevent this somehow miniDOT must be placed in the bucket with the sensor end upwards Otherwise bubbles will accumulate in the sensing end and miniDOT will not sense water DO correctly Use an aquarium pump and air stone in the water to provide a bubble stream Cover the bucket with a black lid The idea is to prevent light from enabling algal growth Record measurements for several hours or a day but in any event long enough for the miniDOT temperature to come to equilibrium with the water During the experiment find the local air pressure either from measurements or from a local Precision Measurement Engineering Inc 11 760 727 0300 www pme com weather station Watch out weather stations often report barometric pressure referenced to sea level You must determine the absolute barometric pressure at your elevation A more comprehensive experiment is to additionally place ice in the bucket mixing until the water temperature is close to zero degrees and then removing the ice Place the bucket on a towel or cardboard and cover with a towel Record for 24 hours as the bucket temperature gradually returns to room temperature After recording the bubbled water you may also remove the air stone and gently mix a packet of baker s yeast into the bucket together with a tablespoon of sugar The water must be only sligh
20. rement of time battery voltage temperature and dissolved oxygen every 10 minutes or at some other interval you may have set using miniDOTControl 3 Inspect the o ring seal for debris 4 Close the miniDOT Logger by screwing the white housing back onto the black end cap 5 Deploy the miniDOT Logger Follow these steps to end the deployment 1 Recover the miniDOT Logger 2 Clean and dry all accessible surfaces except the foil 3 Open the miniDOT Logger by unscrewing the white housing from the black end cap Remove the housing completely taking care that water does not drip onto interior surfaces of circuits or other items inside the logger 4 Connect to a Windows host computer via USB miniDOT will appear as a thumb drive 5 Copy the folder having the same serial number as the miniDOT Logger example 7392 0001 to the host computer Suggested but optional Delete measurement folder but NOT miniDOTControl or the other jar programs 7 Optionally Run the miniDOTControl program to see the state of the miniDOT Logger such as battery voltage or to select a different recording interval 8 Optionally Run the miniDOTPLOT program to see a plot of measurements 9 Optionally Run the miniDOTConcatenate program to gather together all the daily files of measurements into one CAT txt file 10 If no more recording is desired switch the Recording Control Switch to Halt otherwise leave it set to Record to begin reco
21. ry terminal voltage For short deployments of a month or two alkaline batteries will provide adequate performance For longer deployments or for deployments in cold environments substitute lithium batteries AA Lithium Battery Life The miniDOT Logger consumes battery power mostly from the measurement of dissolved oxygen but also slightly from simply keeping track of time writing files sleeping and other activities The following table presents the approximate endurance of the miniDOT Logger when powered by the Energizer L91 AA lithium ferrous disulfide batteries SAMPLE INTERVAL Main AA Battery Life minutes months Samples 500K gt 52 000 a ee gt 8 000 Keep a general record of miniDOT Logger number of samples It is not possible to accurately tell the charge state of a lithium battery from measurements of its terminal voltage If you have a general idea of the number of samples already obtained ona battery then you can make a guess as to how many more samples remain The numbers in the table above are at the time of this writing are based upon extrapolations of testing of 500K samples acquired at 5 second interval The 1 year performance at 1 minute is very likely Performance at longer sample intervals will be much longer but how long is difficult to predict In any event these AA batteries are easily available and relatively inexpensive compared to the cost of the miniDOT PME suggests you replace the batteries often
22. sample interval will be displayed next to the Set Sample Interval button If this interval is acceptable the interval need not be set Precision Measurement Engineering Inc 15 760 727 0300 www pme com To set the interval enter a interval not less than 1 minute and not greater than 60 minutes Click the Set Sample Interval button Shorter and faster intervals are available Contact PME End miniDOTControl by closing the window Unplug miniDOT USB connection Upon disconnection of the USB cable the miniDOT will begin logging or remain halted as indicated by the position of the Logger Control Switch 2 3 miniDOTPlot Begin program operation by clicking on miniDOTPlot jar Software presents the screen shown below Plot Rev x AI fN E Fast Response Sensors and Systems Surface Elevation meters 0 00 B Elevation Barometric Pressure Salinity ppt 0 00 Select DATA Folder none selected miniDOTPlot plots the files recorded by the miniDOT Logger The software reads all miniDOT files in a folder except the CAT txt file The software will also compute oxygen saturation from dissolved oxygen measurements To do this software must know the air pressure and salinity It calculates air pressure based on elevation of the water surface above sea level or uses the barometric pressure you enter if Barometric Pressure is selected If Elevation is entered no compensation for weather induced barometric pressure v
23. t of the end cap threads If internal pressure is suspected then treat the miniDOT Logger with extreme caution Revision History 2014NOV14 Added update Java instructions Removed statement saying alkaline batteries supplied 2015APR15 Added file upload to Android phone instructions U Precision Measurement Engineering Inc 760 727 0300 www pme com CONTENTS Chapter 1 Quick Start 1 1 The Quickest Start Possible 1 2 A Few Details Chapter 2 Software 2 1 Overview and Software Installation 2 2 miniDOTControl 2 3 miniDOTPlot 2 4 miniDOTConcatenate Chapter 3 miniDOT Logger 3 1 Overview 3 2 Opening and Closing the Logger 3 3 Electrical Connections and Controls 3 4 Battery Replacement 3 7 Install Copper Mesh Precision Measurement Engineering Inc 760 727 0300 www pme com Chapter 1 Quick Start 1 1 The Quickest Start Possible Your miniDOT Logger has arrived completely ready to go It is set to measure and record time battery voltage temperature oxygen concentration and measurement quality once every 10 minutes and write 1 file of measurements daily You need only open the miniDOT Logger and switch the Recording Control Switch to the RECORD position In this condition the miniDOT Logger will record measurements for a year before the internal battery is expended You must re close the miniDOT Logger prior to deploying it At the end of the deployment period you need only to open the logger and connect
24. tcl Product_Data_Sheet NA DATASHEETS MN1500_US_CT pdf Caution Improper replacement of the battery will damage the miniDOT Logger Follow these steps 1 Move the Logger Control Switch to the Halt position 2 Remove the depleted batteries noting the position of the terminal 3 Use only new fully charged batteries both of the same type 4 Install fresh batteries with the position the same as the removed battery The position is also marked on the inside of the battery holder 5 The miniDOT Logger LED Light should flash to indicate that the software is beginning operation within a second or two after you complete the battery installation At this time the logger will enter the mode selected by the Logger Control Switch which should initially be Halt from Step 1 If you install the batteries backwards you should plan to purchase a new miniDOT Logger End of Manual Precision Measurement Engineering Inc 21 760 727 0300 www pme com
25. tly warm to the touch but not more than 30 deg C These organisms will deplete all the dissolved oxygen in the water Cut a disc of thin plastic film just large enough to lay on top of the water Place this on top of the water Do not stir or bubble after placing the film Record measurements for at least an hour or more Use miniDOT plot to examine the measurements Saturation values should be very close to 100 depending upon the accuracy that you have determined barometric pressure If you placed ice in the bucket then saturation values will still be 100 but you will see the DO concentration and temperature change greatly as the bucket warms The recorded data when using yeast should show 0 saturation and 0 mg l dissolved oxygen concentration In practice miniDOT often reports slightly positive values of about 0 1 mg l but within the accuracy of the miniDOT Closing and Opening Close and open miniDOT like you would a flashlight open by unscrewing the white cylinder from the black end cap Close by screwing the white cylinder on When closing do not tighten the white cylinder Just screw it on until it makes contact with the black end cap See Chapter 3 for more instructions Caution DO NOT remove the stainless steel screws in the black end cap There are no user serviceable parts here If the screws are removed you will damage the miniDOT and it will have to be returned for repair Storage When Not in Use Remove the batteries K
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