with a Fluke 287/289 Digital Multimeter
Contents
1. Event recording or logging with a Fluke 287 289 Digital Multimeter One of the major features of the Fluke 280 Series digital multimeters DMM with TrendCapture is their ability to record measurement data or do logging This application note explains what kind of logging these meters can perform how to use the recording feature and what information it can provide This note also discusses how to use FlukeViewe Forms PC software to increase the power of the Recording feature For the balance of this note we will refer to the Fluke 289 DMM although the information is equally applicable to the Fluke 287 DMM Application Note Note This article references features included in a firmware upgrade to the 289 DMM released in August 2008 To obtain the latest firmware version visit www fluke com software downloads For a summary of the changes reference the end of this document Differences between the Fluke 289 DMM and a data logger The Fluke 289 does not do data logging in the traditional sense Typically the goal of a data log ger is to sample the input signal at a rate sufficient to track activ ity that you might find in the signal This often means that it is desirable to sample the input as fast as possible so you don t miss anything The problem with this approach is you need a large storage place for the fast data sampling that is taking place You can also end up wad ing through a lot of re2. AG JIII FE ZD PM information screen appears a a cH aa dies E MYAG TILEY AG EUM a paad f kal Note that the bottom line of this Sykli a A E Pa isisru display indicates the battery IEN Fu IRAV AS VLIW AS EBL Pt 337m condition If the battery is par set dee Peal i a or Pd Logos Pieced tially discharged the Battery partly empty advisory appears See step 1 above Figure 1 2 Fluke Corporation Event recording or logging with a Fluke 287 289 Digital Multimeter Step 4 Using the navigation arrows highlight Set Duration and press Edit F1 Edit the duration setting to 07 Days 00 Hrs 00 Min We can always manually stop the recording procedure earlier if we like Note Recording duration and sample interval times may interact setting one variable may adjust the other to fit the recording session within the available memory Step 5 When Duration and Sample Interval settings have been changed to desired values press OK F1 to accept the changes Step 6 Press the Start F2 softkey to begin recording You can now leave the meter unattended The 289 will record the current amps used by the refrigerator Note While recording is active 1 the power button LED will flash on and off 2 five minutes after any button press the display will turn off to con serve battery power Press any button to turn the display back on and 3 the display will show the start time the remaining time and number
3. it was being recorded You can also program certain functions of the meter from your computer while it is connected Note This process assumes you already have FlukeView Forms installed on your computer Step 1 Using the IR USB cable connect the meter to your computer It s best to have the meter in the active measurement mode not in setup or any of the save record view functions while connected to your computer When con necting the IR connector to the meter verify that the Fluke logo on the IR connector is visible when viewing the display of the meter Now turn the meter on Note The meter cannot upload data while memory or TrendCapture infor mation is being displayed Step 2 Start FlukeView Forms on the computer The New Blank Form window will appear For our refrigerator example select Sample Logging Form short and then press OK E You should see a connected icon with the port identified in the lower right part of the display If there are port con flicts you may see the Options window appear where you will have to select an available unused port Press OK when you see the connected icon appear The next pop up win dow to appear should be Get Meter Data Fluke 289 287 It will ask you if you want to Get meter data now If this window doesn t appear automatically you may select Meter on the menu bar and then select Get meter data from the drop down lis
4. to show more details of unusual events 51 To use this new feature first position the vertical cursor bar over the point of interest in the Trend Data display using the left and right arrows and then press the up arrow to magnify the display by two centered on the cursor position You can do this repeatedly until the desired resolution is achieved Zoom back out by using the down arrow Date and time are reported above the graph along with the zoom level full display is x1 The recorded value at the cursor position and the time it was recorded are reported under the graph Other features additions and updates When switching to the current measurement functions A mA or uA the meter will remem ber the last used selection for ac or dc 39 Once in this function the same setting will hold between A mA and uA This feature is useful when the operator is using ac only or ac dc current clamp accessories to minimize repeat setup actions 2 A Smoothing mode may be enabled for ac measurements 49 This feature allows you to select a filter to smooth noisy ac readings Smoothing options are accessed using the Setup Instrument soft keys Under Edit you can then turn the smoothing function on or off using up down arrow keys You can add your name company name worksite and contact information under Setup Meter Info 49 This information can only be added using FlukeView Forms software while the meter is c
5. C IA mA A for long logging sessions just to keep things organized Average Min Time TEA mA TO SS PH GN mA BS Oe Rt FH 4504 mA Bo 1020 Pe DIES mA AT 111610 PM DIES mA AC 11 2725 PM G79 mA AC 1721 FH PATE mA AC Toe PM 1 2655 mA AC 11 3243 PM 1 222 mA AC 11 FH 1 235 mA AC TEST A FRA mA Ar 1YE A Mir Doscrpton Sio 1 208 mA AL Stabi TOUI mA AT ibinu 1 143 ma AT Linsdadle DSS ma AC intemal GITE mre AT Shee LI mA AC Ureia 1 Bi mA AC Shabi 1797 mA AC Interval 1 S07 mA AC nbena BES m AC Statie 1 GA ae 2a Shae able to detect 239 instances of unusual events down to the second they occurred for our later inspection type The meter can record four session types Measurement Min Max Peak and Record ing You can store sessions in any one of the Name categories you choose although it s gen erally a good idea to use the Measurement name category for individual measurement saves and the Recording name Wrapping it up This is only a brief description of Event Recording using the Fluke 289 and the added power provided by the companion PC software FlukeView Forms In our example we used only 405 readings to capture the current used by a refrig erator over nearly 42 hours of recording yet the meter was This step by step example following one recording ses sion from the meter recording process into TrendCapture and then FlukeView Forms is intended as an introduction to the power of Event Recordi
6. a 24 hour oper ation For any longer recording period or if in doubt replace the batteries with fresh new ones Step 2 Connect the meter to the circuit being measured In this example the ac current was measured by connecting a current transformer probe to the mA jacks of the Fluke 289 That is because the probe output is 1 mA A We then place the jaws of the probe around the circuit conductor in the distri bution panel that is connected to the breaker dedicated to the refrigerator If the DMM function switch is in any position except A mA or pA the meter will beep to indicate that the switch must be in one of these two posi tions to proceed and the display information screen will show the details In this case we want the A mA function The meter will sense the presence of the lead in the mA jack and select the proper circuit for the recording Note Although not required in this case if a signal normally varies a full point you might want to estimate a maximum current or voltage that you expect to encounter and set manual ranging to the higher range This will prevent recording multiple events due to auto ranging Step 3 Press the Save F2 softkey and highlight the Record option using the navigation arrows Then press the Record F1 softkey below the display 7 iae Mir FOE At this point the Recording A Sere i Tine Mgs Maaa be Tina Mn i ipio Tip Time j j Io TAIYA TS ma DIF ee THUJ V
7. age numbers are indicated to help you locate details of these features in the updated user manual available online in pdf format at www fluke com 289 manual Recording and display TrendCapture 1 Basic settings for a recording session have been simplified and clarified 53 54 Sk Recording setup is accessed using the Save Record soft keys In the Recording Menu you now select only Duration of recording and Sample Interval Percentage of available mem ory and battery condition are reported 2 Event Threshold Value for AutoHOLD and 4 Recording can now be set in the meter 54 Previously it was necessary to make this set ting using FlukeView Forms software from a connected computer Default values are 4 for both functions Threshold value setup is accessed using the Setup Recording soft keys On the Recording Setup screen you may now select Event Threshold to adjust the AutoHOLD threshold value and adjust using the cursor keys for values between 1 and 30 Event Threshold for Recording may be turned off if only interval recording is desired or set to one of seven selected values between 1 and 25 3 The TrendCapture graphic display of events recorded by the meter has been improved to more clearly indicate the activity of a device being recorded No change in user operation is required to make use of this improved display 4 A new Zoom feature has been added to the Trend Data display that expands the graph
8. ather than the normal 15 min utes The likely reason was that the interval was interrupted by a sudden change in the meter input Second to look at the detailed information recorded around the event of interest look to the Logged Reading Table just below the graph on your form Figure 10 Scrolling to reading 298 we see the interval in question in detail And reading 299 was an unstable event that shows the time the defroster heater turned off Third notice the extensive file naming and storing options in the meter hinted at in the Data Session selection win dow in Figure 4 Note that the meter stores multiple sessions with the user selected Ses sion Name Session Type Start Time and Number of Readings Max Time Maw TESEI F Wh SE zF 11 0013 F 1 ese WP 11 31 30 F Wee 11 3219P 1141 3P i202 A 1H He A Duration Lip ig Be Des Lat Bi ase ews oo 013 ire 4 DOE 14 4 tiis 07 034 Pt HA Star Time 1oS19 PM too Seo PM 11 00 19 PM 110 2 PM Sample 1 205 mA AC 5 S02 mi A EAN ma Ac OE a AC Dima AC 11 2219 PM 4350 ma wo 1191 20 Pa S000 me AC 13 2 PM 1 B63 a AC 11 3206 PM Iai mA aC 11 3510 P i a20 mA AC SS mi 2 iiStig PM IPOT AM Figure 10 Session names are avail able in several categories and use self incrementing numbers for each session in a selected 2470 mA SC GEN mA AC 6 40 mA AC TVET MA AC D1 mA A HESS mA AC 000 mA Bic 1ot4 mA AC 335 mA AL SOT m A
9. d time of about 29 minutes You can also see that the signal being measured was stable near 119 V for most of the logging session However there was one unstable event detected by the meter during a 1 6 second period beginning at 2 18 PM The graph clearly shows the switching event that happened at that time What is interest ing about this example is that the table of data shows only six events needed to be stored in the meter memory over the entire 29 minutes of logging to capture the essence of what happened What this illustration shows is that with event recording only a very small amount of memory is needed to store the informa tion To capture the same data using traditional data logging would require a one second sample rate over the entire 29 minutes which would have produced 1 740 records of data yet that level of detail was not required to detect the problem Recording by the numbers Now that we know how the Fluke 289 records data let s go through the step by step process for recording a desired signal over time In this case the test will record the signature of the current drawn by a large household refrigerator for more than one day The following steps can be generalized to any recording situation Step 1 Make sure that the battery indicator in the upper left hand corner of the Fluke 289 display shows at least two of the possi ble four bars indicating enough charge is left for
10. dundant data that is considered normal to find the exceptional data or lack thereof The difference between the Fluke 289 DMM and a tradi tional logger is that the DMM while sampling internally at a sub second rate records only significant changes in the read ings This technique called event recording requires far less memory Still it does an effective job of monitoring and logging data from an input sig nal enabling you to detect if and when the monitored system is operating abnormally The other difference is that the Fluke 289 DMM can graph the data onscreen in TrendCap ture mode immediately after the recording session is com pleted TrendCapture is a major enhancement in the 28X family over the previous logging capa bility of the 189 which had to upload each recording session to software to graph and view the results The Fluke 289 uses sim ilar graphing software optional for detailed analysis but its abil ity to graph even rough details immediately onscreen can be very powerful In addition the 28X can now hold multiple recording sessions in it s mem ory allowing troubleshooters to get multiple sets of data possi bly at different locations without having to download each ses sion as in the past Introduction to event recording Event recording can be thought of as an extension of the Touch Hold feature of the original Fluke 87 DMM Touch Hold is now called Auto Hold
11. ems to accept information When you have uploaded Operator Name information from FlukeView Forms to the meter to be viewed on the meter using Setup Meter Info the added Operator Name will be appear in FlukeView Forms when you download data from the meter It will appear in the FlukeView Meter Infor mation form item If you re using one of the sample forms delivered with the software this item may be shown on your form with the Serial No label Make sure you expand this item on the form using FlukeView Forms Designer to display this second line of information You might also want to change the label to something more appropriate such as Meter Info since the field now displays more than just a serial no 6 Fluke Corporation Event recording or logging with a Fluke 287 289 Digital Multimeter The internal programs of these meters are stored in flash memory As a result Fluke can now offer product updates and improvements from time to time This sidebar summarizes new additions to the Fluke 289 287 firmware with version 1 1 Where applicable these feature changes have already 1 been incorporated into the main body of this application note The updated firmware may be downloaded from the Fluke website at www fluke com software downloads and installed using the USB connecting cable furnished with FlukeView Forms software Any future firmware updates for the Fluke 287 289 Digital Multimeters will include these same features P
12. mary information ad on e ath ee brai Hr ame LANN PH ita PF Fiskeview Logged Readings Graph ae Da Fd Seji a A fiw ALL aH me IPH Ts Kl z 1 ALE ial NRA ASA Fe hs Anii bis por F F Figure 6 4 Fluke Corporation Event recording or logging with a Fluke 287 289 Digital Multimeter dtom in dum Ca Unde Zoom Musi Graph Vin Shoa Dat irid Lines lapsed Time Lo Cep Geran Heln wet Lifrin BS i Manual Zoom selec raens y Qurpor Vales average Min Tine i free i Te ie ee ee emae Bii fidd Figure 7 near midnight on Thursday morning First the running current was near 5 amps and then the following cycle lasted for much longer than normal What we have discovered is the occasional defrost cycle that is a feature of this refrigerator The 5 amp portion is the operation of the defrost heater and the longer next cycle is an extended compressor run to remove the excess heat Zoom choices as well as many other options affecting the graph Figure 7 The highlighted Manual Zoom allows you to precisely locate the area of interest using the time scale at the bottom of the graph In our example in Figure 8 we show the period from 10 00 PM on Wednesday to 2 15 AM Thursday morning when the defrost cycle occurred Here you can see a few nor mal cycles then the defrost cycle and recovery and finally the return to normal c
13. ng in the Fluke 289 We recom mend further exploring these features at your leisure Changing or adding data to the meter from FlukeView Forms Screen Shots from the meter With the introduction of version 3 4 of FlukeView Forms it is now possible to save screen shots from a connected Fluke 287 289 digital multimeter ils Be 3 The procedure for saving a screen shot is as follows On the meter select the screen to be saved as the current meter display In FlukeView Forms connected click the Meter icon In the upper left hand corner of the 289 287 import win dow select Meter Display On the right hand side of the active display window select the Get Screen Shot button The Fluke 289 287 Screen Shot save window will appear Select the folder and specify a file name for the file to be saved The file saved will be a zip file with an extension bmp The screen shot can then be unzipped as a JPG or other file format and placed on a FlukeView Forms Bitmap object in your chosen form It may also be used in other software applications or emailed if desired There have been several additions to the ability to upload information to the meter from FlukeView Forms From the menu select Meter Change Meter Setup The window that appears shows everything that may be changed in the meter To change a name in the meter s Name list click on the Edit Name List button at the bottom of the window Changing FlukeView Form it
14. of recorded interval samples and events Step 7 Recording is stopped in three ways 1 Automatically when the recording duration time has reached 2 Automatically when the battery level becomes critically low or 3 Manually by pressing the Stop F4 softkey When recording is stopped the power button LED will stop flashing on and off Note that once the recording session has stopped you cannot resume that session Note Returning to Stopped Screen after meter auto powers off When recording ends automatically due to duration time being reached the dis play is turned on if it had been off and the meter will power off accord ing to the Auto Power Off setting in Instrument Setup never or N minutes If the recording ends due to the bat tery becoming critically low the meter will immediately power down Turn the meter back on If the battery is showing empty turn the meter off and replace the batteries Turn the meter back on The meter will start showing the display as if you were at the start of Step 8 Step 8 Press Save F2 to bring up the Save display Step 9 Press the Name F1 softkey to select the recording session name to be associated with this saved data In this case since it is a recording you might choose to highlight Recording and note that a boxed number appears This number is automatically incremented each time you do a save using that save name Note this saved name including it
15. on the 287 289 When the Auto Hold feature is activated the meter waits until a period of stability From the Fluke Digital Library www fluke com library has been reached then it beeps and freezes holds a stable reading on the display for the user to see If the input changes to the point that it is no longer stable then becomes stable again the meter will beep a second time and hold a new reading on the display Event recording uses a similar scheme When the Fluke 289 is recording it is looking for peri ods of stability For each stable or unstable period the meter logs a start time the initial reading stop time the maximum reading minimum reading and the times of their occurrence and average reading during that period The event recording feature is designed to store only enough information to describe any changes i e events to the input signal Event recording data The Fluke 289 excels at record ing transition events but while it has TrendCapture graphing capability it does not have the kind of large graphical display resolution needed to analyze all of the event data This is where FlukeView Forms software takes over allowing you to view the recorded data in table or graph form on a PC An example is shown in the figure below Gee Comte H mgh rau ee Lpi E HE mE PE Looking at this data you can see that the recording session started at 1 54 41 PM and ended at 2 23 47 PM with an elapse
16. onnected to your computer Changing file names 49 When saving a measurement min max peak min max or recording session the meter selects one of eight possible Save Names with an auto incrementing number The user can now use Fluke View Forms to change the Save Names to something more meaningful Fluke Keeping your world up and running Fluke Corporation PO Box 9090 Everett WA 98206 U S A Fluke Europe B V PO Box 1186 5602 BD Eindhoven The Netherlands For more information call In the U S A 800 443 5853 or Fax 425 446 5116 In Europe M East Africa 31 0 40 2675 200 or Fax 31 0 40 2675 222 In Canada 800 36 FLUKE or Fax 905 890 6866 From other countries 1 425 446 5500 or Fax 1 425 446 5116 Web access http www fluke com 2008 Fluke Corporation Specifications subject to change without notice Printed in U S A 8 2008 3325448 A EN N Rev C Modification of this document is not permitted without written permission from Fluke Corporation 7 Fluke Corporation Event recording or logging with a Fluke 287 289 Digital Multimeter
17. s number so that you can easily identify the source of the data in memory after you upload it to FlukeView Forms That s because you could easily have ten or more recordings in memory before you return to a computer Step 10 Now press Save F1 one more time to complete the storage of the test data in the DMM mem ory The display screen will now show the Start time the Dura tion of the test and the number of Interval samples and Events that were stored Congratulations You have successfully completed a recording session and saved the results in the meter You can now turn the meter off or use it for other purposes until you choose to transfer your data to a computer 3 Fluke Corporation Event recording or logging with a Fluke 287 289 Digital Multimeter Using TrendCapture You may now safely press the Trend F3 softkey to view the stored results in graphi cal format A vertical cursor will appear in the center of the TrendCapture display Using the navigation keys you can move this cursor over areas of interest in the graph and the value and time of recording for that value will appear m 06707708 LH 05 30 08 07 03 09pm xt O gt DEs lt 19 00 1 830 mAAC 01 57 42pm HH MM Per Summary close Figure 2 Single refrigeration cycle 09 30 28 30 37 33 The first thing to note is that the graph has been scaled to 20 mA Here s what s happening The current level was mo
18. stly at about the 2 mA level when the compressor was running The 18 mA spikes show the momen tary motor starting current each time the compressor ran The blank gap near the center of the screen is interesting so now we ll use the TrendCapture Zoom feature using the up down navigation keys to look at the detail a h 06 01 08 KHY 05 30 08 07 03 09pm x3 lt 18 36 1 944 mAAC 02 21 01pm HH MM Summary close Figure 3 Single cycle zoomed 14 36 16 36 20 36 22 36 While in Trend mode the F3 menu selection changes to Summary Press the softkey to see the session summary data including the Start Time and Duration of the recording and the number of Interval Samples and Events recorded The main display shows the last recorded value in the session Note Time scale for Figure 2 and 3 is elapsed time Use TrendCapture immedi ately after recording to do a brief inspection of the recorded data for any suspicious events that might suggest further test ing You can also use it later in conjunction with the Summary screen to evaluate or identify multiple saved files in the meter if you didn t note the saved session name at the time of recording Uploading recorded data to FlukeView Forms The next steps describe how to transfer the recording results to FlukeView Forms where you can complete reports that include graphs showing what hap pened to the refrigerator during the time
19. t Step 3 Press OK to begin the upload process If the data you re try ing to upload is the last session you recorded then the data you want will be displayed in the FVF Virtual Meter memory screen You can verify this by viewing the summary informa tion at the bottom of the window that appears Figure 4a Then select Copy into Form on the COM6 right side of the window This data will automatically copy to the displayed Form Figure 4b Step 4 If the recording you want is not the last one recorded then you must open the pull down window in the upper left corner of the window and select Data Sessions A table will appear showing the Session Name Session Type Start Time and Number of Readings for each session saved in the meter See Figure 5 Step 5 Select the desired Recording and press Get Session Data When the upload is complete the selected recording will be present and you can Copy into Form In our example Figure 6 Recording 4 spanned nearly 42 hours of refrigerator operation What we see on the graph is the repeated cycle of turn on the 18 amp narrow spike compres sor run a few minutes at 2 to 3 amps and off time more than 15 minutes at 0 0 amps A quick glance at the graph shows an unusual event high lighted by the dashed circle ie eee eee ae TOE rE eee A ee ee ee imie Tipai dime headend niall i era nmm ae E1 A a nE Figure 4a Sum
20. ycles There are three more features in FlukeView Forms that you should be aware of The first allows you to examine the detail for a selected point on the graph This feature is revealed by mov ing your screen cursor to the point of interest until the cursor changes to a pointing finger For our example we ll choose the beginning of the 6 amp read ing Then left click and hold to see a pop up window with detailed information for the selected sample Figure 9 This feature gives you instant detail regarding a point of inter Tone Oo 4944 E E i ma da SO Fluke View Logged Headings Graph aiz kem Di 68 hugh vee Aa 1HP 1 Ta T Fai Figure 8 A similar event might be the operation of an ice dispenser as it crushes ice or the ice maker as it refills and freezes new ice cubes FlukeView Forms has a Zoom feature that allows us to look closely at an event of interest in greater detail You can click and drag a box around the area of interest or you can right click anywhere on the graph to see a pop up window with several Foratage BSF ri el Mir 5507 m Af Durston 111469 Shut Time 1 46008 1RR TA Fh Stop Tame LT 2008 11 0 SP Chiara ril a4 i7 Tha 3AM EAK ciki Figure 9 5 Fluke Corporation Event recording or logging with a Fluke 287 289 Digital Multimeter est in your recording You ll note that reading 298 was an Interval which only lasted 11 minutes r
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