HOBO Micro Station User`s Guide
Contents
1. sss esee 18 Mounting instructions for a flat surface ssssssesssseeenem ener 19 Using Micro Station accessories sssssssssseeeeeee ener nennen enne 20 Mounting the logger with the Mast Mounting Kit sss 20 Connecting the External Grounding Wire Adapter Cable ssssssssssssseennene 21 Connecting the External Communications Port Adapter Cable sss 22 Field preparation checklist i nr btt ecd tied dn a ai EO ed Biss id 23 Set up the tripod cross arm and sensors sess ene enne enne 26 Chapter 5 Troubleshooting eeseeeeeeeeeeeeeee eene enne ananasas sasas saaa ananasas sasas 28 Chapter 6 Maintenarice ciere tenete etr a ala e asas ais io ae 30 h Ellauziecne bw mh 30 Performing a visual jao L 30 Cleaning the Micro Station nm 30 Checking the desiccant PACK On 31 Replacing the batteries sss E nennen shes D A 31 Verifying the Sensor del lg An 31 HOBO Micro Station User s Guide iii Chapter 1 Introduction Chapter 1 Introduction The HOBO Micro Station is a four sensor data logger designed for applications reguiring multi channel monitoring of microcl2. Estimating battery life Battery life will vary with e Logging and sampling intervals in use most important factor e Number of sensors e Battery type e Operating environment 12 HOBO Micro Station User s Manual Chapter 3 Logger operation Use the following table to help you estimate how long the batteries will last the run time based on the logging interval Note The run times in this table assume that the recommended battery type for the temperature range is being used and up to four sensors are connected Logging interval Sampling Interval Typical battery run time 1 second Off 30 to 50 days 1 minute Off About 12 months 10 minutes 1 minute 12 months or more Additional guidelines e Turn off the sampling interval unless you have sensors that support measurement averaging which includes the 12 bit Temperature Photosynthetically Active Radiation and Solar Radiation smart sensors and the 4 20 mA and 0 5 Volt input adapters Check the sensor manual to see if your sensor supports measurement averaging e Make sure the Use Before date on the battery housing is at least two years from the current date e Alkaline batteries will lose up to 10 of capacity a year sitting on a hot shelf and can lose up to 50 or more if cooked repeatedly for example stored on a car dashboard Keeping batteries in the refrigerator can reduce self discharge to 1 to 2 per year however be sure to avoi
3. adding sensors decreases running time while increasing the logging interval increases running time In most applications battery life limits the duration of the data logging before memory capacity The following figure shows the expected run time for several logging intervals based on the total number of bits in place which is determined by adding together the bits per sample for each sensor measurement parameter in your system For example a Micro Station with the following sensors is using 56 total bits 1 Temperature X 8 8 1 Wind Speed X 16 16 2 Temperature RH X 16 32 Total number of bits 56 HOBO Micro Station User s Guide 15 Chapter 3 Logger operation At a logging interval of 5 minutes the memory run time for a Micro Station using 56 bits would be approximately 250 days based on the following figure See the sensor s manual for the number of bits each type of sensor uses 500 450 5 400 4 350 300 4 s 1 minute 4 5 minutes e 250 4 m 10 minutes E 15 minutes c 5 200 20 minutes 30 minutes 150 4 100 4 50 4 0 E T T T T T T T T T 20 40 60 80 100 120 140 160 180 200 Total Number of Bits Memory run time 16 HOBO Micro Station User s Manual Chapter 4 Field setup and mounting Chapter 4 Field setup and mounting This chapter explains how to set up the Micro Station in the field both with and without the optional acce
4. does not work contact your Onset dealer or Onset Computer Corporation Logger is not found e Check and replace the batteries e Check communications cable connections HOBO Micro Station User s Guide 29 Chapter 6 Maintenance support and service Chapter 6 Maintenance This chapter explains e Recommended maintenance for the Micro Station Maintenance Regular maintenance on the HOBO Micro Station is essential because it extends the life of the components and helps to ensure the accuracy of recorded measurements When the Micro Station is deployed in the field potential damage can come from numerous sources such as rodents birds vandals and heavy storms Periodic check ups in the field allow you to e Check that the station is still set up and functioning as you intended e Check for damage e Minimize the impact of any damage found This is particularly important if the Micro Station is being deployed for a long period of time such as several months or a year Regular checkups will help ensure that you are continuing to gather data as expected Performing a visual inspection Periodically perform a visual inspection of the Micro Station tower and logger enclosure Check that e Cables and wires are not damaged cracked cut split or broken e All the screws and bolts are tightly secured e The mast is still level if in use e The ground attachments are fastened to the tripod and logger if in use e
5. Adapter Cable install them now See the instructions on pages 21 and 22 If you opened any parts Double check the packing lists to make sure you haven t lost any pieces If you are using the Mast Mounting Kit mount the logger now See the instructions on page 20 If you are using the Solar Radiation Shield Set up the Temperature and Temperature RH sensors There are several small pieces required to connect these sensors to the shield that could easily get lost in the field It is strongly recommended you install these sensors in the solar HOBO Micro Station User s Guide 23 Chapter 4 Field setup and mounting 4 Task radiation shield before going to the field See the solar radiation shield manual components Repack the logger and sensors for transit It is strongly recommended that you use the original packaging when possible because it is custom designed to protect the Micro Station and its your site needs Logger Rain Gauge Sensor Gather the tools required for setup Use the following checklists to make sure you have the necessary tools to set up the Micro Station in the field The items marked optional depend on Item Item Phillips head screwdriver Mast level Part M MLA optional for mounting on separate mast Adjustable 8 inch or 10 inch crescent wrench if using mast mounting kit Pen pencil or other blunt instrument Sledgehammer or post
6. Mast Mounting Kit e External Grounding Wire Adapter Cable e External Communications Port Adapter Cable Mounting the logger with the Mast Mounting Kit An optional Mast Mounting Kit Part M MKA is available for mounting the logger to a 4 1 cm 1 5 8 inch diameter mast such as the optional 1 5 m mast Part M MPB or 2 m tripod Part M TPB and 3 m tripod Part M TPA IMPORTANT The logger must be mounted vertically so that cables hang down preventing moisture from entering the connection and to allow for proper ventilation of the case through the Gore Vent The tools required to mount the logger to a mast are e 1 2 inch wrench e Phillips head screwdriver e Mast Mounting Kit Part M MKA which includes one mounting plate two 1 5 8 inch U bolt assemblies and four 6x38 flat head screws Follow these instructions 1 Unscrew the clear cover on the logger 2 Place the four screws provided in this kit through each of the four holes next to the screw holes used to attach the clear cover Screw in the four screws through the inside of the case to the mounting plate 3 Using the two 1 5 8 inch U bolt assemblies and the mounting plate mount the logger upright to the mast Place the U bolts around the mast and install the saddle clamps Place the logger mounting plate against the saddle clamps and screw on the U bolt hex nuts 4 Screw the cover back on the logger when done Make sure there is adequate silicone grease on
7. Station you will need the following One to four smart sensors Phillips head screwdriver Slotted screwdriver or small coin Pen pencil or other blunt instrument Adjustable 8 inch or 10 inch crescent wrench Utility or pocket knife PC interface cable CABLE PC 3 5 for serial ports USB serial adapter ADAP SER USB if no serial port is available Computer with logger software installed Silicone grease tube Logger and smart sensor setup instructions 1 Insert four AA alkaline or lithium batteries For more details on which type of batteries to use see the Selecting and installing batteries section in Chapter 3 on page 11 2 Place the battery strap on the batteries HOBO Micro Station User s Guide Battery strap Chapter 2 Assembly and testing 3 With a crescent wrench remove the dome nut from the stuffing gland in the sensor port Dome nut Stuffing gland slit insert Stuffing gland on sensor port 4 Push the slit insert out from the inside of case You may need to push the slit insert out using a pen capped end pencil eraser end or other blunt instrument 5 Some sensors have an anti snag device on the connector as shown below If any of your sensors has this device check that the connector fits through the stuffing gland Anti snag device on some external sensor connectors in on If the connector does not fit through the stuffing gland you will need to trim the anti snag device with a
8. There is no excess rust replace rusty parts as necessary Cleaning the Micro Station The logger enclosure does not require regular cleaning However it is recommended that in dusty locations you regularly clean these items e Solar radiation shield Wash with soap and water Dirt cobwebs obstruct air flow Discoloration can cause increased solar absorption which can result in increased errors Do not get the temperature RH sensor wet see the temperature RH sensor manual for instructions on cleaning it e Light sensor Make sure the drain hole is not plugged If you need to clean the sensor head see the sensor manual for details and cautions on proper cleaning e Rain gauge Make sure there are no leaves or debris in the collector Make sure the funnel is not plugged use a cotton swab if necessary to clean 30 HOBO Micro Station User s Manual Chapter 6 Maintenance support and service e Anemometer on wind speed sensor Make sure the cups do not have any dirt dust cobwebs Clean if necessary e Logger enclosure Remove dust with compressed air Do not get water inside the enclosure e Tower Hose with fresh water if necessary Checking the desiccant pack The desiccant pack included with the Micro Station is an indicating desiccant pack which means it changes color from blue to pink when it is no longer absorbing moisture If the desiccant pack is blue it is still good If it is pink it is bad and needs to be reconditioned
9. To recondition a desiccant pack place it in a warm dry spot until it turns blue For example place the desiccant pack in an oven set to 50 to 70 C 122 to 158 F for 24 hours Once it turns blue again you can place it back in the logger If the desiccant pack is pink also check for condensation within the logger If there is condensation check that the fittings are still tight and secure and the cover s rubber gasket is clean and has an even coating of silicone grease or consider moving the logger to a drier location Replacing the batteries Batteries are cheap insurance Replace them at least once a year to prevent any loss of data Be sure to read out the logger before replacing the batteries For more details refer to the Selecting and installing batteries section in Chapter 3 Verifying the sensor accuracy For most sensors it is recommended that you test sensor measurement accuracies once a year Onset Computer can verify the accuracy of all sensors and recalibrate some sensors For more details on verifying sensor accuracy refer to the Sensor Manuals included with the sensors HOBO Micro Station User s Guide 31
10. cable which is the digital communications portion of the sensor cables If you are using multiple sensors be sure to check the length of each smart sensor network cable reported in the Sensor Manuals Add them together and make sure they do not exceed 100 meters 328 feet accuracy Upon launch the Micro Station s clock is set in Coordinated Universal Time UTC which is determined from the clock on your computer Once the Micro Station is logging it will keep fairly accurate time However there are three main sources of errors with time reporting Host clock error A common source of error is an incorrect time in the computer used to launch the logger Make sure the clock on your computer is set to the correct date and time before launching the logger One resource for calculating accurate time settings for UTC colloquially known as Greenwich Mean Time or GMT is the www time gov web site Start up error The logger can lose as much as 2 seconds when it is launched This is a one time error that occurs as part of the start up sequence and cannot be avoided Clock drift The long term time accuracy is a function of temperature The worst case error is 8 parts per million PPM a week at 25 C which is about 5 seconds per week The error increases as the temperature deviates from 25 C see the figure below If the temperature were a constant 20 C the logger time error could be as much as 35ppm 21 seconds per week HOBO Micro S
11. full wrap around when full Operational Indicators Seven lights provide logging and sensor network status Logging Interval 1 second to 18 hours user specified interval Battery Life 1 year typical use up to 4 sensors with 1 minute or longer logging interval Battery Type Four standard AA alkaline batteries included for operating conditions 20 to 50 C 4 to 122 F optional AA lithium batteries available for operating conditions of 40 to 70 C 40 to 158 F Time Accuracy 0 to 2 seconds for the first data point and 5 seconds per week at 25 C 77 F Data Type Supports measurement averaging for select sensors Logger Start Modes Immediate push button or delayed start options Data Communication Current reading while logging offload while logging or offload when stopped Environmental Rating Weatherproof with Gore Vent and silicone gasket for deployment in harsh weather conditions tested to NEMA 4x and IP66 HOBO Micro Station User s Guide Chapter 1 Introduction HOBO Micro Station Mounting Mount vertically on flat surface 18 cm 3 5 inches or wider optional mast mounting kit for use on 4 1 cm 1 5 8 inches diameter masts Enclosure Access Cover secured by four screws Sensor Network Cable 100 m 328 ft maximum Length Part Number H21 002 C The CE Marking identifies this product as complying with all relevant
12. minimum logging interval is one second and the maximum for most loggers is 18 hours 12 minutes and 15 seconds The shorter the logging interval the more quickly memory fills and battery power is consumed Select a sampling interval if applicable The sampling interval allows you to take multiple measurements within the logging interval then average them together to create a single logged measurement The sampling interval is optional and is valid only for sensors that support HOBO Micro Station User s Manual Chapter 3 Logger operation 10 11 12 measurement averaging Refer to the sensor s user manual to determine whether measurement averaging is available on the sensor If you have at least one sensor that supports measurement averaging click the Enable button then set the sampling interval at less than or egual to the logging interval up to four minutes Rapid sampling faster than one minute will reduce the logger s battery life If you do not have any sensors with measurement averaging or wish to turn off the sampling interval click the Disable button Select when to start logging You can choose to launch the logger e Now Logging begins as soon as you click the Start button If you do not have at least one sensor attached the logger will not launch e At Interval Logging will begin at an exact interval for example 9 00 00 rather than 8 47 00 when you choose a one hour logging interval The exact start tim
13. reading out Refer to the HOBOware user s guide for detailed information Refer to the HOBO U Shuttle manual for instructions on launching reading out or checking status with a HOBO U Shuttle Launching To launch the logger with HOBOware 1 2 Connect the logger to the computer and open HOBOware Select Launch from the Device menu or click the Launch icon on the toolbar to open the Launch Logger window In the Description field type a description for the launch This description will be used as the default file name when you read out and save the data recorded by the logger In the User Notes field type up to 2 000 characters of information about the deployment optional Select each sensor you want to include in the deployment Only the sensors that are currently plugged in or built into the logger are listed Sensors are listed in ascending order by serial number regardless of their physical position in the logger If you add or remove sensors click the Refresh button to make sure your changes are seen by the logger and displayed in this list Type in a label for each sensor optional Click the Filters button to create any additional filtered series such as average temperature per day automatically when you read out the logger and plot the data Select a logging interval which is how often the logger will record data You can choose either one of the preset logging intervals or specify a custom logging interval The
14. sensor If found remove the offending sensor and check its wires and connector for damage and or signs of moisture e n general it is recommended that you read out any data when this light is blinking investigate the problem and re launch the logger The battery low light is blinking after the batteries were replaced e Check the polarity make sure the batteries are installed properly It is possible one cell is reversed e Make sure you aren t using a combination of alkaline and lithium batteries Never mix battery types e Check the battery expiration date make sure it is at least two years from the current date Batteries can lose significant capacity if stored at elevated temperatures e Check the voltage with a voltmeter Alkaline batteries should be at least 1 5 volt per cell when new lithium batteries should be 1 6 volt per cell 28 HOBO Micro Station User s Manual Chapter 5 Troubleshooting Batteries die prematurely e Check for excessive moisture in the logger enclosure Severe and or repeated condensation in the logger enclosure can lead to short circuits and battery failure It may be necessary to add additional sealing and or desiccant to the logger enclosure to prevent condensation e Check to make sure that both the logging and sampling intervals are set for at least 1 minute or greater Sampling Logging intervals faster than 1 minute will rapidly deplete the battery See the section on
15. setup and mounting 11 Recheck that all the U bolts nuts and clamps are secure for the entire system 12 The logger is ready to begin logging e If you configured the logger to launch with a push button start the Button Start light should be blinking To start logging press and hold the button inside the logger enclosure for a second until all lights flash the logger cover must be off to access the button e f you configured the logger to start on a specific date time the Delay Start light should be blinking The logger will start automatically at the date time you entered e If you did not set up the logger with a button or delayed start connect the logger to the computer to launch it See Chapter 3 for details on connecting to the logger and launching 13 Once the logger is launched make sure the OK status light is blinking This indicates the logger is recording data properly You may need to cup your hand over the top of the logger to see the lights in full sunlight 14 Screw on the logger cover if you removed it earlier making sure the desiccant pack is inside the logger enclosure to minimize internal condensation remove desiccant pack from its foil pouch before installing Make sure all logger openings are covered and the sensor dome nut is secure HOBO Micro Station User s Guide 27 Chapter 5 Troubleshooting Chapter 5 Troubleshooting The following chart lists common problems you may encounter with the HOBO
16. start Press and hold until all lights flash External connection Gore Vent along access port with silicone gasket allows case to breathe without allowing in moisture Connector for grounding wire and remote communications optional 8 Sensor port Communications port used for connecting to a computer Data access port 8 HOBO Micro Station User s Manual Chapter 3 Logger operation Status lights There are seven lights on the Micro Station that indicate logger activity and status The following table explains the function of these lights Sensor Activity There is activity on the sensor Network activity is defined as communication from network the logger to the sensor or vice versa Delay Start The logger has been configured to The logger will not record measurements while this launch at a specific date time will light is blinking Sensors can be added at this time continue blinking until the defined start date time Button Start The logger has been configured to The logger will not record measurements while this start with a push button start will light is blinking Sensors can be added at this time continue blinking until you press and hold the button on the logger for a couple of seconds OK Every two seconds while the logger is Sensors cannot be added at this time recording data from sensors The battery power is less than 25 The logger will continue to run However you capacity should r
17. the upper mast on the tripod consider attaching the cross arm and sensors that will go at the top of the mast as it will be easier to mount them while the upper mast is lower to the ground Install any other smart sensors and solar radiation shield if applicable Mount the upper mast to the lower mast Mount the logger to the upper mast Position the logger enclosure so that it will not be in the way of the guy wires If you are using the External Grounding Wire Adapter Cable or External Communications Port Adapter Cable attach the grounding wire to the mounting plate U bolt Install the guy wire kit Set the final position of all sensors and plug them into the logger if you haven t already done so Check that the batteries are securely seated in their holder with the battery strap in place Use cable ties to secure all sensor cables to the cross arm bracket mast and tripod legs The sensor cables should run below the cross arm and brackets to minimize the chance of birds pecking and damaging the cables Cable ties should be spaced no more than 3 m 1 foot apart Some examples are Gather the excess cable and attach the cable ties to the upper mast behind the logger Leave about a 5 cm 2 inch drip loop of cable below the logger All cables should be neatly secured to the mast when complete Sensor cables Cable ties Mounting plate from Mount Kit m adi Drip loop HOBO Micro Station User s Manual Chapter 4 Field
18. Estimating battery life for more details e Check for damaged wiring and or sensors Damaged cables or connectors can result in complete or partial sort circuits that will rapidly drain batteries No status lights are flashing e The lights are very faint In direct sunlight shield the sun and check again e Make sure the batteries are not dead Batteries should have at least 1 volt per cell e The memory may be full Read out offload data from the logger and re launch e The logger may not have been launched Check the status with the logger software OK status light is not flashing Make sure the logger is launched If you configured the logger to start logging on a specific date time check the date and time you selected and make sure the Delay Start light is flashing If you configured the logger to launch with a push button start press and hold the button on the logger for a second until all the lights flash Data file contains errors If you are missing data for a particular sensor check that the sensor was properly installed Remove and re insert the sensor and check that it can take current readings If you find that it is not communicating it may be a bad sensor Contact your Onset dealer or Onset Computer Corporation Data file can t be opened The data file may have become corrupted In rare circumstances the data file may have errors Offload the logger again and try opening the file again If that
19. HOBO Data Loggers HOBO Micro Station User s Guide micro station ONSET corporation r 7645 L Contact Information For support please contact the company that you bought the product from Onset Computer Corporation or an Onset Authorized Dealer Onset Computer Corporation 470 MacArthur Blvd Bourne MA 02532 Mailing Address P O Box 3450 Pocasset MA 02559 3450 Phone 1 800 LOGGERS 1 800 564 4377 or 508 759 9500 Fax 508 759 9100 Customer Service Hours 8AM to 5PM Eastern Time Technical Support Hours 8AM to 8PM Eastern Time E mail loggerhelp onsetcomp com Main Onset Web site www onsetcomp com WARNING Fire Explosion and Severe Burn Hazard Do not mix battery types either by chemistry or age batteries may rupture or explode When replacing the batteries read and follow their disposal instructions dispose of lithium batteries according to local regulations Do not dispose of batteries in fire Never attempt to recharge a lithium or alkaline battery Do not heat the batteries above 185 F 85 C Do not mutilate or rupture the battery housing Lithium batteries may explode if the logger is exposed to extreme heat or conditions that could damage or destroy the battery case Do not expose the contents of the battery to water gt WARNING Severe shock hazard Before installing tripod or mounting poles ensure that there are no electrical power lines overhead Do not install the system during any at
20. Micro Station and possible resolutions Individual sensors are not found or are missing in the Launch Logger window in HOBOware e Ifa sensor is removed and then immediately re inserted it may not be auto detected and therefore will not appear in the Launch Logger window Click the Refresh button in the Launch Logger window e Check for a loose connection between the sensor and the logger e Make sure you haven t exceeded 100 meters 328 ft of network cable All sensors are missing in the Launch Logger window in HOBOware Remove all but one sensor then check if the sensor appears in the Launch Logger window Continue to remove and re insert the sensors one at a time until you find the bad sensor If you find a bad sensor or if none of the sensors communicate contact your Onset dealer or Onset Computer Corporation The error status light is blinking e If the error light is blinking in conjunction with the OK light there was a communication failure The system has recovered but you may have an intermittent problem Try checking the sensors one at a time to make sure they are all communicating If you find a bad sensor or if no sensor communicates contact your Onset dealer or Onset Computer Corporation e Ifthe error light is the only light blinking then at least one sensor is currently not communicating Immediate investigation is recommended Look for a loose connection which could cause bad electrical contact with a
21. d condensation forming on the batteries e Use new batteries if you expect the deployment to require a substantial portion of battery life based on the table above e Batteries are relatively inexpensive don t take a chance with suspect batteries Checking battery status There are two ways to check the battery status of the logger e Check the Bat Low light on the logger This light blinks when the battery has 25 or less capacity remaining e Check the status with logger software For alkaline batteries the status is displayed in the percentage of capacity remaining Lithium battery voltage is either listed as good which represents anywhere from 25 to 100 of capacity remaining or empty which represents 0 to 25 of capacity remaining Lithium batteries have a relatively flat discharge curve which means the voltage does not vary much with use until they fail Because of the uncertainty in capacity it is recommended that you start new launches with fresh lithium batteries that you know are at 100 rather than relying on old ones It is always recommended that you read out the logger before replacing batteries If you replace the batteries while the Micro Station is logging it will stop recording data The data will not be overwritten however until the next launch Adding and removing sensors Smart sensors plug into the logger and collect data about various weather parameters Before you bring the logger and sensors t
22. directives in the European Union EU How to use this manual This manual covers the steps to set up operate and maintain the Micro Station including e Assembling the logger and perform an initial test e Operating the logger e Setting up the Micro Station in the field e Troubleshooting problems e Maintaining the Micro Station and getting service and support It is important that you test your system using the steps in Chapter 2 before continuing with other chapters in the manual and installing the Micro Station on site Smart sensors supported The Micro Station supports a range of smart sensors including e Temperature e Temperature relative humidity e Rain e Soil moisture e Wind speed e Wind direction e Barometric pressure part S BPB CM50 only e Solar radiation e Photosynthetic active radiation PAR e 0 5 Volt Input Adapter e 4 20 mA Input Adapter e Pulse Input Adapter contact closure and electronic switch Refer to www onsetcomp com for a current list of compatible sensors Refer to the manuals provided with the sensors for sensor specifications mounting information and recommended maintenance 2 HOBO Micro Station User s Manual Chapter 2 Assembly and testing Chapter 2 Assembly and testing The HOBO Micro Station is shipped partially assembled This section explains how to assemble the logger connect the smart sensors and perform a guick test Items required To configure the Micro
23. door then use the back of the logger enclosure door Refer to the sensor manual for more information on how to use the input adapter Mounting instructions for a flat surface You can mount the Micro Station to a flat surface without any optional accessories IMPORTANT The logger must be mounted vertically so that cables hang down preventing moisture from entering the connection and to allow for proper ventilation of the case through the Gore Vent To mount the logger to a flat surface such as a 2x4 pressure treated stud or plank you will need e Phillips head screwdriver e Four Phillips head screws shipped with logger Follow these instructions 1 Remove the clear cover from the case 2 There are four holes next to each of the four screw holes used to attach the clear cover as shown below Screw in the four Phillips head screws through the inside of the case into the flat surface Use the dimensions in the following figures for determining where to drill holes on the mounting surface m di 90 mm 3 5 inches gt E 2 37 inches ee 103 mm 4 06 inches lt 114 mm 4 5 inches Holes for mounting logger Dimensions for mounting pattern 3 Replace the clear cover HOBO Micro Station User s Guide 19 Chapter 4 Field setup and mounting Using Micro Station accessories This section explains how to use the following accessories with the Micro Station e
24. driver optional for mounting on separate mast Eye protection safety glasses if using sledgehammer post driver Small coin or slotted screwdriver Slotted screwdriver Utility or pocket knife Conduit optional 24 Light Sensor Wind Speed or Wind Direction Sensor Item Item v Ladder if deploying sensor above 7 16 inch wrench eye level Light sensor level Part M LLA Crescent wrench or second 7 16 inch wrench Phillips head screwdriver 1 1 06 inch 2 00 inch hose clamps if mast mounting without cross arm Compass Gather the tools required for setup continued Soil Moisture Sensor Temperature RH or Temp Sensor Item Item v Trenching shovel spade or flat bar Phillips head screwdriver 1 if sensors are not already installed Water optional Conduit optional 4 20 mA Input Adapter Pulse Input Adapter Item Item Y Hook and loop tape Two wire nuts 0 5 Volt Input Adapter Item HOBO Micro Station User s Manual Chapter 4 Field setup and mounting 4 Task Hook and loop tape 3 m or 2 m Tripod with Mast M TPA or M TPB Cross Arm M CAA or M CAB Item v Item v 1 2 inch wrench 1 2 inch wrench Mast level Part M MLA Cresc
25. e depends on the logging interval you choose e Push Button Logging will not start until you press the button on the logger and hold it down for at least three seconds e On Date Time Logging will begin at a date and time you specify up to approximately six months from the present e Save Settings in Logger Logging will not start but the launch settings will be saved so that you do not have to re enter them when you are ready to launch at a later time The next time you view the Launch window for this logger the settings you entered will still be in place Select when to stop Logging either when memory fills or never wrapping If you select when memory fills then the logger will stop recording data once the memory is full If you select never wrapping the logger will record data continuously until either the logger battery runs out or you stop it Once the logger is full the newest data will overwrite the oldest data Click the Start button when you are finished choosing the launch settings Note that the text on the Start button varies depending on when you chose logging to begin HOBOware displays the progress of the launch and warns you not to unplug the logger while it is being configured Reading out To read out the logger with HOBOware 1 2 3 Connect the logger to the computer and open HOBOware Select Readout from the Device menu or click the Readout icon on the toolbar If the Micro Stat
26. ead out the logger and then replace the batteries soon Mem Low Less than 25 of memory is The logger will continue to run until all memory is available for saving data used This light will only blink if the logger is configured to stop logging when memory fills There is or has been a sensor If this light is blinking in conjunction with the OK communication failure light there was a communication failure The system has recovered but you may have an intermittent problem If this is the only blinking light then at least one sensor is currently not communicating Immediate investigation is recommended In general it is recommended that you read out any data when this light is blinking investigate the problem and re launch the logger Communicating with the logger You can launch read out or check the status of the Micro Station with a computer or HOBO U Shuttle U DT 1 1 Use a slotted screwdriver or small coin to unscrew the data access port cover Data access port cover HOBO Micro Station User s Guide 9 Chapter 3 Logger operation 2 Cable plugged into communications port Insert the PC interface cable or shuttle cable through the data access port and plug it into the communications port on the logger Once connected to the computer use the logger software to configure the launch read out the logger or simply check the status See the following sections for general information on launching and
27. ent wrench Medium size wire cutters Crescent wrench Redimix cement optional Stake Kit M SKA or M SKB Shovel optional Item vc All purpose grease Sledgehammer Tape measure Eye protection safety glasses Tie wraps 3 m Mast M MPA 1 5 m Mast M MPB Item v Item v 1 2 inch wrench Sledgehammer or post driver Sledgehammer or post driver Eye protection safety glasses Eye protection safety glasses if Mast level Part M MLA using sledgehammer post driver Mast level Part M MLA Redimix cement optional Redimix cement optional Shovel optional Shovel optional All purpose grease All purpose grease Tape measure Tape measure Grounding Kit M GKA Guy Wire Kit M GWA Item v Item v 1 2 inch wrench Phillips head screw driver 2 Sledgehammer 1 2 inch wrench Eye protection safety glasses Medium size wire cutters Medium size wire cutters Crescent wrench Solar Radiation Shield M RSA Light Sensor Bracket M LBB Item v Item v 1 2 inch wrench 1 2 inch wrench Phillips head screwdriver 1 if sensors aren t already installed HOBO Micro Station User s Guide 25 Chapter 4 Field setup and mounting Set up the tripod cross arm and sensors You can mount the HOBO Micro Station on a tripod with a cross arm Follow this general procedure Refer to the Tripod Setup Guide and sensor manuals for detailed steps 1 2 3 26 Set up the tripod lower mast Install the grounding kit Before installing
28. five times the height of the obstruction A WARNING Severe shock hazard Do not set up the Micro Station near power lines Contact between the Micro Station and power lines may result in a shock electrocution or death e For areas with winds greater than 50 mph to stabilize a tall mast or if the rain gauge is attached to the top of the mast use the Guy Wire Kit Part M GWA and 1 2 inch Stake Kit Part M SKA to secure the system e Either an External Grounding Wire Adapter Cable Part CABLE HWS G or an External Communications Port Adapter Cable Part CABLE HWS F is required if you will be using a wind speed or wind direction sensor with the logger or if the logger will be placed in an exposed location In addition the Grounding Kit Part M GKA is recommended if the logger will be outdoors in an exposed location Electrically ground the logger to its mounting mast which in turn must be connected to a ground rod to reduce the chance of damage from atmospheric electrical activity e 2 meter Tripod Tower Assembly Part M TPB You must set up the tower on level ground there should be no ground slope The legs on the 2 meter tower are non adjustable If the site you are using is not level then you will need to either level it or use shims to level the tripod Be prepared to dig if necessary Suggested Mounting Use 1 4 inch Stake Kit Part M SKB e 3 meter Tripod Tower Assembly Part M TPA The maximum gro
29. ial Ports Select the COM port noted in Step 2 in this example it is COM4 Note On a Mac the Keyspan adapter will be listed as something similar to USA1I9H1d1P1 1 H HOBOware Preferences es Y Save Preferences V You can have more thz V Device Types Select device type USB devices only Serial devices only Q USB and serial devices Serial Ports Select All E Serial port s to use V COM1 E coM3 v COM4 P Device Speeds Click OK in the Preferences window to save these settings HOBOware should now be configured to work with the Keyspan USB to serial adapter HOBO Micro Station User s Guide 7 Chapter 3 Logger operation Chapter 3 Logger operation This chapter explains key elements of Micro Station operation including e Definition of logger components e How to communicate with the logger including launching and reading out e Guidelines for selecting and installing batteries e Time accuracy of the logger e Logger memory Logger components The following diagram explains the key parts of the Micro Station Status lights see table in this section for details on each of the seven lights Battery holder with batteries installed and battery strap in place y Strap in p Sensor connection ports where up to four sensors can be plugged in Start logging button use this button when logger is configured to launch with a push button
30. imates in one or more locations Part of the HOBO Weather Station family the Micro Station uses a network of smart sensors for taking measurements Key features of the smart sensors include HOBO micro station e Automatic detection upon launch No extensive programming wiring or calibrating is required to set up sensors e Easy expansion Because the logger is not pre configured up to four sensors of any type or combination can be added simply by plugging them in before logging begins Using an expansion chassis up to 15 data channels are possible e Digital network The connections between the smart sensors and the logger are digital ensuring accurate reliable data collection and storage e Weatherproof A silicone gasket around the edge of the case keeps out moisture while a Gore Vent allows the case to breathe while also keeping moisture out Specifications HOBO Micro Station Operating Range 20 to 50 C 4 to 122 F with alkaline batteries 40 to 70 C 40 to 158 F with lithium batteries Sensor Inputs Up to four smart sensors including multiple parameter sensors Communication 3 5 mm serial port or use serial to USB adapter cable ADAP SER USB to connect to a USB port on the computer Dimensions 8 9 cm H x 11 4 cm D x 5 4 cm W 3 5 x 4 5 x 2 125 inches Weight 0 36 kg 0 8 Ib Memory 512K nonvolatile flash data storage Memory Modes Stop when
31. ion is logging you can choose to either stop the logger before reading out or to let it continue logging After the readout is complete you can plot the data Note that readout speed depends on the method used to connect to the logger and the device being used Typically a readout via PC interface cable with the computer will take about six minutes for a full Micro Station 512K of data Selecting and installing batteries The Micro Station requires four 1 5 volt AA batteries The logger is shipped with four alkaline batteries but it is also compatible with lithium batteries For most applications alkaline batteries are the preferred solution because They are relatively inexpensive HOBO Micro Station User s Guide 11 Chapter 3 Logger operation e The battery gauge in the logger software will provide an accurate battery status e They have slightly more usable capacity than 1 5 Volt lithium batteries in temperate environments In cold applications below 0 C 32 F and hot applications above 40 C 104 F lithium batteries will generally outperform alkaline batteries Alkaline batteries will still work in temperatures ranging from 40 to 50 C 104 to 122 F and from 20 to 0 C 4 to 32 F however they may not be the best choice At temperatures lower than 20 C 4 F and higher than 50 C 122 F alkaline batteries are unsuitable use lithium instead If the temperature is variable across the extremes use
32. knife so that the connector looks like the one below Anti snag device removed from the external sensor EM connector 4 HOBO Micro Station User s Manual Chapter 2 Assembly and testing 6 Insert the sensor connectors through the dome nut The threaded side of the dome nut should be facing towards the connector Then slide the cables through the stuffing gland and through the hole in the case Push the cables into the slit insert Note The electronics on some older temperature sensors are housed in a tube that is close to the sensor connector If you have any of these sensors be sure to insert them first because they will need more room inside the logger Adjust the sensor as needed so that the tube with the electronics fits inside the logger without too much unnecessary bending of the cable tt Stuffing gland on sensor port O ring cord to fill empty holes d t Slit insert Dome nut 4 Sensor cable and connector 7 Plug the sensors into the logger Adjust the cable length as necessary so there isn t excess cable inside the case 8 Ifyou are using fewer than four sensors add the o ring cord s to plug the empty hole s in the slit insert 9 Apply some silicone grease to the slits on the insert 10 Push the slit insert back into the stuffing gland Pushing the slit insert in at a slight angle and with a slight twist may help it slide in more smoothly 11 Screw the dome nut onto the stuffing gla
33. lithium batteries Use the following figure to help you choose the battery type based on the expected temperature range in your deployment 40 C 30C 20 C 100C 0C 10 C 20 C 30 C 40 C 50C 60C 70 C EA Lithium AM EMS a Alkaline 40 F 22 F 4 F 14 F 32 F 50 F 68 F 86 F 104 F 1229F 140 F 158F SS Recommended in this Works in this temperature temperature range range but not best choice Recommended battery type based on temperature Notes e The logger is not designed to run with rechargeable or Carbon Zinc Heavy Duty batteries e Using battery types other than 1 5 Volt alkaline or lithium may result in poor battery performance and erroneous battery state indication A WARNING Fire Explosion and Severe Burn Hazard Do not mix battery types either by chemistry or age batteries may rupture or explode When replacing the batteries read and follow their disposal instructions dispose of lithium batteries according to local regulations Do not dispose of batteries in fire Never attempt to recharge a lithium or alkaline battery Do not heat the batteries above 185 F 85 C Do not mutilate or rupture the battery housing Lithium batteries may explode if the logger is exposed to extreme heat or conditions that could damage or destroy the battery case Do not expose the contents of the battery to water
34. mospheric electrical activity Do not assemble or transport tripods mounting poles or other structures unless there is sufficient clearance from potential electrical sources or other obstructions WARNING Do not climb on or around the tripod if using The Micro Station and any of its associated hardware towers poles etc are not designed to support the weight of a person Injury may result WARNING If using stakes to stabilize the tower ensure that there are no underground wires or pipes under the Micro Station WARNING Do not use weather station as part of a critical control system This system is not intended to be a fail safe mechanism for anticipating life threatening conditions such as flash floods rrr gt 2003 2014 Onset Computer Corporation all rights reserved Printed in the USA Onset HOBO and HOBOware are registered trademarks of Onset Computer Corporation Gore Vent is a trademark of W L Gore and Associates All other trademarks are the property of their respective companies ii HOBO Micro Station User s Manual Table of Contents Chapter 1 Introduction erede niai ins siais aso e kin ni aa is asai kas asas asas aki nai ias e as Aaaa senka kiai iani 1 Siete lee MM LE 1 How to use this manual ii inh etie etait estesa M E aaa iei Nainiai pee ga Abba 2 Smart sensors Supported ear bcd dat dine uin cete eddie dnt 2 Chapter 2 Assembly and testing eseseseeeeeeeeeeeeee nen
35. n with a crescent wrench d 2 Insert the cable through the hole and then screw in this fitting as shown here Dome nut jj Plug grounding wire into this connector Grounding wire plugged into logger HOBO Micro Station User s Guide 21 Chapter 4 Field setup and mounting 5 Fill the void in the backside of the gland nut with silicone grease 6 Connect the grounding wire to a clamp on the mast or tripod 7 Screw the cover back on the logger Make sure there is adequate silicone grease on the cover gasket before replacing the cover Connecting the External Communications Port Adapter Cable An optional External Communications Port Adapter cable Part CABLE HWS F is available for connecting the logger to a serial extension cable This cable includes a grounding wire which is required if you will be using a wind speed or wind direction sensor with the logger or if the logger will be placed in an exposed location on a tripod or tower The tools required to connect the External Communications Port Adapter Cable are e Small coin or slotted screwdriver e Phillips head screwdriver e Crescent wrench e Silicone grease packet Follow these instructions 1 Use a slotted screwdriver or small coin to unscrew the external connection access port cover External connection access port cover External connection access port on logger 2 Apply silicone grease to the o ring on the fitting to be inserted 3 Inse
36. nd tighten by hand and then an additional 2 to turn with an adjustable wrench The dome nut must be snug but shouldn t be overtightened 12 From the back side of the stuffing gland fill the void inside with silicone grease from the package 13 Remove the desiccant pack from its foil pouch and place inside the logger enclosure to minimize internal condensation 14 Apply silicone grease to the outside rim of the case where the cover meets up with the housing The grease should be applied sparingly in this location 15 Screw the clear cover back onto the case Use a Phillips head screwdriver to tighten the four cover screws HOBO Micro Station User s Guide 5 Chapter 2 Assembly and testing Testing the logger It is recommended that you test the logger before setting it up in the field To test the logger 1 Use a slotted screwdriver or small coin to unscrew the data access port cover Data access port cover 2 Insert the PC interface cable through the data access port and plug it into the communications port on the logger If the computer does not have a serial port refer to the next section on using the Keyspan USB to Serial Adapter PC interface cable A plugged into communications port 3 Using the logger software select the Launch icon 4 Make sure all the sensors you plugged in are visible in the Launch screen 5 Choose a logging interval of a few seconds so that your test will yield enough data to lo
37. nd direction sensor with the logger Both an External Grounding Wire Adapter Cable and a Grounding Kit Part M GKA are recommended if the logger will be placed in an exposed location on a tripod or tower If possible avoid sites immediately adjacent to radio television microwave towers and equipment In rare situations strong electromagnetic interference may result in sensor network errors Take note of the mounting considerations in the Sensor Manuals for additional guidelines relative to the particular sensors you are using If mounting the logger to a post or wall note that it is 60 x 103 mm 2 37 x 4 06 inches between the center of the holes on the back of the logger See Figure 10 on page 18 HOBO Micro Station User s Guide 17 Chapter 4 Field setup and mounting e Onset offers a 1 5 meter mast Part M MPB which is especially useful when you are trying to minimize the size and visibility of the Micro Station Guidelines for a tripod system setup In addition to the guidelines above adhere to the following guidelines for using the Micro Station with a tripod e If you will be using a rain gauge or wind sensor select a location away from trees and buildings Place the rain bucket at a distance away from obstructions that is equal to at least three times the height of the nearest tree building or other obstruction and the wind speed or wind direction sensor at a distance away from obstructions that is equal to at least
38. nen nnn nennen innen inii tenni sa nana saaa 3 Items required uo Lee ed UR ecc eo cn D E ete bela o e eL E CD ee edunt 3 Logger and smart sensor setup instructions seen enne 3 Testing the logger s x bia tte iais abs sia e eb n pd esiti atis aaa dip teu cte as 6 Configuring HOBOware for a Keyspan USB to Serial Adapter aaa aaa 7 Chapter 3 Logger Operation ic cciicicecccccicececieeceeeedvececeevenceedecdeceeuevencedecevetaeedesdeceedevsudecesdvocevedesdeuesvstereserdeceers 8 logger COMPOMEMS ist ccc ines asas ais a aaa ter bitten bitu ete ipa bte Sa aa ka taie ilte dtes 8 SaS L SSE e A t aat ode v e E e EN 9 Communicating with the logger ssssssesseee eene nemen nemen enne enne 9 IE HIoIediio T 10 Selecting and installing batteries sssss eene enne 11 Estimating batlery life 1 a koa ia ba EE HER E EET Een tenis 12 Checking battery staluis i t pL Eo EU REEL BTE SA sasas esa 13 Adding and removing sensors sssssssssseeeeeeenen nennen enne aaa 13 TIME ACCUFACV Li D c 14 LOQGEr MEMOPY MERE 15 Chapter 4 Field setup and MOUNTING c c ecceeeeeeeeeeeeeeee eee e ee eeneeeaeee sees ease e aeen anna saaa senas anas sans 17 i eio l Aidai ciki ekDa0lR 17 Guidelines for a tripod system setup esses eene nnne aa Aaaa aaa aaa 18 Guidelines for installing sensors
39. o the field it is important that you gather and test all the sensors Specifically you should e Plug in all the sensors you plan to use HOBO Micro Station User s Guide 13 Chapter 3 Logger operation Make sure they are communicating and Make sure the readings are valid To add a sensor simply plug it into a sensor port on the logger Follow these guidelines when adding sensors Time Never add or remove sensors while the logger is recording data Sensors should only be added while the logger is stopped when configuring the launch parameters with logger software or after configuration but before the start of logging if the logger was configured to start on a specific date or time or by a push button start Any sensors added while the logger is recording data will be ignored Logging will continue normally for other sensors If a sensor is removed while logging the Sensor Error status light will blink when the next logging interval is reached The data for that sensor will then display as missing or erroneous in readouts You cannot replace one sensor with a new sensor of the same type while logging If you would like to replace a sensor with another sensor of the same type for example swap a temperature sensor with a new temperature sensor it is necessary to read out the current data from the logger and re launch with the new sensor The logger can work with a maximum of 100 meters 328 feet of smart sensor network
40. ok at Select the Start Logging Now option and click the Start button to launch the logger 6 After a couple of minutes read out the logger You can choose to either stop the logger and read it out or let it continue logging while reading out 7 Check the data and make sure it appears normal for all sensors For more details on launching and logger operation see Chapter 3 For information on mounting the logger and setting it up in the field see Chapter 4 6 HOBO Micro Station User s Manual Chapter 2 Assembly and testing Configuring HOBOware for a Keyspan USB to Serial Adapter If the computer does not have a serial port you will need to use a Keyspan adapter ADAP SER USB l Install the Keyspan USB to serial adapter software from the CD included with the device or download the software from the Support tab at http www tripplite com en products model cfm txtModelID 3914 Follow the Keyspan installation instructions Open the Keyspan USB Serial Adapter Assistant and the note the COM number assigned to the device In this example it is COM4 ap Keyspan USB Serial Adapter USA19H Assistant Adapter Status Properties Port Mapping Diagnostics Hep c 4 USA19H T COM4 Ide Open HOBOware From the File menu on Windows or from the HOBOware menu on Mac select Preferences Under Communications click the arrow to open Device Types Make sure USB and serial devices is selected Click the arrow to open Ser
41. rt the cable through the external connection access port Screw in the fitting to seal the hole Hand tighten the fitting and then tighten an additional 4 to 4 turn with a crescent wrench 22 HOBO Micro Station User s Manual Chapter 4 Field setup and mounting 4 Plug the cable into the connector Note that the cable can fit into the connector in one direction only Hand tighten the dome nut and then tighten an additional turn with a crescent wrench DAS M Insert the cable through the hole and then screw in this fitting as shown here Dome nut External communications port connector plug in adapter cable here External communications port adapter cable plugged into logger Fill the back side of the gland nut with silicone grease Connect the communications end of the cable to the serial cable Connect the grounding wire to a clamp on the mast or tripod Screw the cover back on the logger Field preparation checklist Use the following checklist to make sure you have all the necessary materials for setting up a Micro Station with accessories from the HOBO Weather Station family of products v Task Check that you received all the parts for your Micro Station system as ordered Configure the logger Set up the logger for launch install batteries and battery strap For details see Chapters 2 and 3 If you are using the External Grounding Wire Adapter Cable or External Communication Port
42. ssories This includes Guidelines for typical field setup Mounting instructions Using Micro Station accessories Tripod setup Guidelines for typical field setup Use the following guidelines to help you choose an appropriate site for setting up the Micro Station and protecting against field hazards A WARNING Severe shock hazard Do not set up the HOBO Micro Station near power lines Contact between the HOBO Micro Station and power lines may result in a fatal shock electrocution or death IMPORTANT The logger must be mounted vertically so that cables hang down preventing moisture from entering the connection and to allow for proper ventilation of the case through the Gore Vent Avoid placing the logger in extremely hot locations such as on a dashboard or the roof of a greenhouse and chronically wet locations such as in a well or any place that is wet most or all of the time Also avoid rising water and flood zones Mount the logger so that it faces away from the sun facing north in the northern hemisphere to avoid the sun causing excessive internal heating Conduit is recommended when placing a sensor in or near the ground to protect against animals lawn mowers tractors exposure to chemicals etc Beware of rodents birds cattle and other animals that can bite peck or trample the Micro Station An External Grounding Wire Adapter Cable Part CABLE HWS G is required if you will be using a wind speed or wi
43. tation User s Manual Chapter 3 Logger operation to see Negative Positive Seconds per week PPM error Temperature in C Worst case time error Reading out the logger and relaunching it will reset the logger s clock This is useful when your logger has been running for a while and its clock needs to be reset Just be sure the computer clock is set accurately before relaunching Logger memory The logger uses non volatile memory which means it retains data indefinitely once power runs out Specifically the logger uses a high capacity Flash memory to store data which can retain the data even when the batteries are removed This type of memory is very durable If the logger dies in the field from dead batteries replace them and read out the logger immediately Do not relaunch the logger until the data has been recovered If your logger is damaged contact Onset Computer because there is a chance the data can be recovered Refer to Chapter 6 for information about returning loggers for data recovery The logger contains 512K bytes of memory Up to 10K of this memory is used to store the launch configuration and deployment notes leaving at least 502K bytes for data storage The logger software automatically estimates how long the logger will record data until the memory is full the run time based on the logging interval and the number and type of sensors connected In general
44. the cover gasket before replacing the cover Insert four screws in holes to Mounting plate from mount logger to the plate optional Mast Mounting Kit x TP U bolt saddle clamp y U bolt mast not shown Mounting the logger with the Mount Kit U bolt hex nut 20 HOBO Micro Station User s Manual Chapter 4 Field setup and mounting Connecting the External Grounding Wire Adapter Cable An External Grounding Wire Adapter Cable Part CABLE HWS G is required if you will be using a wind speed or wind direction sensor with the logger or if the logger will be placed in an exposed location on a tripod or tower The tools required to connect the External Grounding Wire Adapter Cable are e Small coin or slotted screwdriver e Phillips head screwdriver e Crescent wrench e Silicone grease packet Follow these instructions 1 Use a slotted screwdriver or small coin to unscrew the external connection access port cover External connection access port cover External connection access port on logger 2 Apply silicone grease to the o ring on the fitting 3 Insert the cable through the external connection access port Screw in the fitting to seal the hole Hand tighten the fitting and then tighten an additional 4 to 4 turn with a crescent wrench 4 Plug the cable into the connector Note that the cable can fit into the connector in one direction only Hand tighten the dome nut and then tighten an additional tur
45. und slope is 13 degrees The legs on the 3 meter tower allow for limited adjustment on uneven ground Be prepared to dig if necessary if the slope is significant Suggested Mounting Use 1 2 inch Stake Kit Part M SKA e Itis recommended that two people set up most tripod systems Some assemblies are heavy and are easier to handle with two people e Be sure to stabilize level and secure the tripod on firm ground It may be necessary to adapt the installation to the existing site conditions as necessary for example if mounting the tripod on ice or rock you may need to use a masonry clamp to secure it Guidelines for installing sensors e Ifrunning cables along the ground we recommend running them through conduit to protect them from animals some animals like to chew on the cables lawn mowers and being tripped on e For information on protecting the sensors properly refer to the Sensor Manuals e Leave enough slack in the cables so that they can be routed into the logger 18 HOBO Micro Station User s Manual Chapter 4 Field setup and mounting e Ifyou are deploying multiples of the same sensor type be sure to note the serial number on the cable associated with each measurement location so you can interpret the data later e To mount the 4 20 mA or 0 5 Volt input adapters use the self adhesive hook and loop tape to mount the input adapter on top of the battery cover If another sensor is already mounted on the battery
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