Home

Mobile Device Power Monitor Manual

1. Figure 22 Selection Stats 21 Battery life current and power statistics for the selected channel are visible in the STATS area of the UI In order to get correct values for Expected Battery Life the user should be sure to set the Battery Size before the run If there is no region selected the statistics will be associated with the entire run as in Figure 23 below Time 1346 s Samples 67320 Consumed Energy 0 85 uAh Average Power 0 66 mw Average Current 023 mA Average Voltage 291 V Expected Battery Life 880 48 hrs 200 mAh Battery Q Main Figure 23 Capture Statistics Whereas the graph shows average data base on the timescale the Capture Statistics region provides averages over the entire sampling run as well as instantaneous values for the run Average power is derived from instantaneous current and voltage and then averaged over the duration of the sampling run Instantaneous voltage is shown for Vout Instantaneous Current and Power can be viewed by toggling between mA and MW button as shown below In addition if multiple channels are being measured at once the user can toggle between those channels If a smaller area is selected with the mouse on the graph then the statistics are computed only for the selected area as shown in Figure 24 below IQ Power Tool TempSaved gt Measured Power Data 1842 Ms 1729 1780 CAPTAS ROGERS Use 1000 Time ms eu Vere Figure 24
2. sessseseenen nnnm nn nnn 40 How do I test whether my unit is still in calibration cece cece eee ence mn 40 Can I re calibrate my Power Monitor without sending it back to the factory 42 ELECTRICAL SPECIFICATIONS OF THE MOBILE DEVICE POWER MONITOR cseeeeeenne nmn 43 Main Channel ier RR FEVER DOREAR EA OC ERE Ee e Een ele DERE E OO ER E YR 43 USB Chanine cec 44 Auxiliary Channel vc ect v Roe Es T E T O ERR RETE 45 BATTERY BY PASS MODIFICATION INSTRUCTIONS eeeeseeeeen nenne nne nhe hne nn nennen nnn 46 Testing the Copper Tape Connections eeesseeseeesseenn emen nennen nnn 50 POWER MONITOR DATA AND CONTROL PROTOCOL sssssssesssse eene menn nnns 52 COMMAND LINE OPERATION OF THE POWER MONITOR issssseee nemen menn 52 TAGGEN COGCS DEED 53 Capture Data Mask recti xax ERREUR SE RRVERTEVRNUVEXY VER YLIYN ONT VT CIEN HT eta 56 POWER MONITOR EXIT CODES een rrrx Eten i nban iere EEr Ors EN mas rve DOT UK OVE DEDOS E ees 57 PAD PILE FORMAN aivexa ass stnce cies PETERE 57 Header Sectio Mres dsini ER decd neds capt irae deen er RO ae Exp ERREUR T EN casts 57 Interpreting the Sample Data sssssssssssssesseeemmemen mens eene mense nnn 63 Missing data Values EX RR UR SR BARRE XERERAR EXER E EPUM DOR URN n 64 Example C program to process a PT5 file sssssssssssssesem mm 64 Document Revision History Date Released Revision Number No
3. The goal is to get the Aux channel to as close to the main channel as possible To do this RUN the Power Monitor and toggle between Main amp Aux and observe the values Vout ENABLED Vout ENABLED 4 00 V 3 98 V Inst Corrent Inst Current 9917 m 98 75 ma 634 s 31680 17377 uAh 39331 mW 9873 mA 398 V Figure 35 Comparing Aux and Main current Select the Parameters button to see the settings dialog and adjust the Aux course slider in 1 step increments or decrements as applicable numbers in Figure 36 below are for example only yours will vary Figure 36 Adjusting Aux resistor offsets Apply the parameter change and then re run the Power Monitor to see if you re closer to a match between the two channels After you ve fine tuned the Course resistor you will want to repeat this process with the Aux fine channel and a resistor with a value closer to 1000 ohms 31 Before calibration your display will show the Main and AUX current as separated lines Measured Power Data Time s Figure 37 Example graph pre calibration After calibration the channel measurements should converge as shown in Figure 388 You are now ready to begin measurements Measured Power Data 110 PEL TE ELC CLES CECE TEC ECC CUR CCC EPO TP EL OPURT CRU TUR CUE ST UTE ETERS OUT Pee ee ee ee A m 105 OE Im Pere ae 555595254 2454824d 1sn6sbs5 s5b5bs5555s5s5554442428242H08bs3b5s85s55s5s44445482455525
4. Figure 50 test leads Solder the exposed end of the black test lead to the copper tape that connects to the Ground battery terminal Solder the exposed end of the red test lead to the copper tape that connects to the Voltage 4 battery terminal Figure 51 connected leads You can cover the solder joints with epoxy to make them more secure This is optional 50 51 Test the copper tape connections by first placing the battery back into the device Do not connect the device under test to the Power Monitor Try to power up the device The device should not power up because the battery voltage has been bypassed with the copper and insulating tape If the device powers up then go back and re assess the application of the copper and insulating tape and make sure you have selected the correct battery terminals If the device does not power up then the connections are correct and testing may begin Connect the supplied mini grabber J hooks to the corresponding loops from the battery Plug the banana plugs to the correct voltage output channels on the Power Monitor Device under test should only power up when power is supplied by the Power Monitor Vout enabled ro Figure 52 If the device under test is exhibiting low battery warnings and higher voltage is required to power the device up it is likely that the battery test leads are too long and or have an incorrect cable gauge rating 52 Power Monitor Data and Control P
5. 2 Under Device Manager find Mobile Device Power Monitor will have a yellow exclamation mark 3 Right click and select Update Driver Software Select Browse my computer for driver software 5 Browse to C Program Files x86 Monsoon Solutions Inc PowerMonitor Drivers PC and click on Next 6 Click on Close once the driver has finished installing 7 Under Device Manager Ports COM amp LPT verify that the Mobile Device Power Monitor COMx has enumerated properly 1 Power on the Power Monitor in Output Enable mode by depressing the Output Enable button and the Power button simultaneously Amber led should be on 2 Under Device Manager find the Unknown device and right click select Update Driver Software 3 Select Browse my computer for driver software 4 Browse to C Program Files x86 Monsoon Solutions Inc PowerMonitor Drivers Firmware and click on Next 5 Click on Close once the drive has finished installing 6 Under Device Manager Custom USB Devices verify that the Microchip Custom USB Device has enumerated properly Updating the Firmware The Power Monitor is shipped with the latest firmware and in most cases will not be required to be updated If for any reason the firmware does need to be updated use the following instructions Power on the Power Monitor in Output Enable mode by pressing on the Output Enable button and Power button simultaneously The amber light should be on Figure 3 Output Enabl
6. 4 096 V output ushort 303 31 powerUpCurrentLimit runTimeCurrentLimit Max current during power up amps 8 1 limit 1023 Max current during sample run amps 8 1 limit 1023 ushort ushort 305 307 33 35 powerUpTime ms byte 309 37 usbFineResistor Resistor offset ohms 0 05 offset 0 0001 sybte signed 310 38 auxFineResistor Resistor offset ohms 0 10 offset 0 0001 sbyte signed 311 39 initialUsbVoltage See Table 5 ushort 312 40 initialAuxVoltage See Table 5 ushort 314 42 hardwareRevision Hardware revision level 12A 2 B 3 C etc byte 312 44 temperatureLimit Degrees Celsius byte 313 45 usbPassthroughMode O off 1 on 2 auto byte 314 46 62 mainCoarseResistor Resistor offset ohms 0 05 offset 0 0001 sbyte signed 315 47 usbCoarseResistor Resistor offset ohms 0 05 offset 0 0001 sbyte signed 316 48 auxCoarseResistor Resistor offset ohms 0 10 offset 0 0001 sbyte signed 317 49 defMainFineResistor Default resistor offset ohms 0 05 offset 0 0001 sbyte signed 318 50 defUsbFineResistor Default resistor offset ohms 0 05 offset 0 0001 sbyte signed 319 51 defAuxFineResistor defMainC
7. 6 Back view Power connector and USB connector Turn on the Power Monitor hardware by engaging the power button on the front The internal fan will briefly power up and then power down Initially the power light emitting diode LED is amber and then it turns green The green LED is connected directly to the internal power of the Power Monitor Figure 7 Front view Engaged power button and powered up green LED 10 Refer to the Appendix on how to properly configure a device battery to connect to the Power Monitor Note Wear safety goggles at all times while working with exposed battery terminals and wiring K K K OK PK DK OK K K K OK DK DK K K OK OK CK K CK K K OK DK CK K K K OK OK OK CE K OK OK OK CK CK K OE OK OK CK K OK OK OK OK K OOK CK CK CE OK KK Connecting the Power Monitor to a device to collect current measurements can be complicated and dangerous Be sure that the area where power measurements are being conducted is protected from fire danger do not have flammable items nearby These measurements are at your own risk and these procedures are not guaranteed to prevent damage or injury K K K OK SK CK OK OK CK OK OK CK CK CK CK OK CE OK CK CK CE CK OK CK K K K OK CE OK CK CE OK CE CK CE CK CE CK CE CE KKK Note There is no way to guarantee a proper connection When attaching the power measurement hardware to a device with a lithium battery there is alw
8. A Mobile Device Power Monitor Manual Ver 1 15 Distributed By Monsoon Solutions Inc 2405 140 Avenue NE Suite A115 Bellevue Washington 98005 425 378 8081 Www msoon com Table of Contents INTRODUCTION ein vacua vx cua tvade D FREE RDARAXERR E UREK E NE DK TR MERDA Ka vu da x AL Rie ndo Op RIXA RP i 3 HARDWARE AND SOFTWARE REQUIREMENTS FOR THE DEVELOPMENT WORKSTATION ceeeeeeeeeeeeeaeees 5 INSTALLING THE POWERTOOL SOFTWARE DRIVERS AND CONNECTING TO THE POWER MONITOR Vip ia e aa i a EN E TEED EE E E 6 Power Monitor Driver Installation s ssssssssssssssssssssssrrerrrnnrnrrrrrrrrrrnrrrnnrnnnnnnannnnnnnennn 6 Firmware Driver Installation Instructions eese nemen nennen 7 Updating thie FIRITWate ceat cerent crine ir tenees ca aua ch ERR RR UBER XTUNDER ER VERRE A CO REIN CAEN RR 7 Connecting to the Power Monitor Hardware cceeeeee cee e eee eee e eects eee eats een neta aed 8 Connecting the Power Monitor to a Device sess emen 10 USING THE POWERTOOL SOFTWARE ns rh uma E AERE ARR eww REA RR RYE REA EEEREN VxYVVRRE EN REV YR 11 Checking the Software Revision of the Power Monitor eceeeeeee eee ee testes ee eeee ees 12 Powering up and Powering down a Mobile DeViCE ccceeeee eee ee eee teeta eee eee ee ened 13 Low Battery Warning on Device wc siictiitcletetecteidied eltcenetoneieasied ace edie ER EIE S DOR RARE ER MERA IER AUR ES 14 Over Current Error from the Main
9. Power Monitor For example If you require a higher measurement voltage the AUX channel can support up to 5 5V If you require larger sustained currents the AUX channel can support up to 4 5 Amps continuous current If it is necessary to vary voltage continuously without ending the sampling run In order to do so connect the Power Monitor as shown in Figure 41 3 4 Figure 41 Benchtop Power Supply connection to Aux channel Connect a BNC Dual input connector to the AUX port We recommend the Pomona 1296 BNC to Banana plug adapter This hardware is not included with the Power Monitor Connect the positive output of your external power supply to the black terminal of the BNC adapter Connect the red terminal of the BNC adapter to the positive terminal of your Device Under Test DUT Connect the negative terminal of the DUT to the Power Monitor main ground terminal and to the ground terminal of the benchtop power supply The Aux channel only supports low side testing and will produce inconsistent and unreliable results if the DUT is connected high side 35 36 The data importing features of the Power Monitor allows the user to import data from the following data formats The PowerTool software can import the file formats shown in the following table File format Description PT5 Binary data in exactly the same format that the Power Monitor creates for internal processing this is compatible with the curr
10. Power Supply ceceeeeeee eee ee eee eeee teens eee eeeaeeeeaeaenanaeaes 14 Protecting the Main Power Supply from an Over Current Error ccceceeeeeeeeeeeeeeeeeeeeeeeeeaeas 15 The Set Parameters Dialog BOx csssssssssssesssens sese senses enn 16 The Legend Dialog BOX irren rrr ti XR RR POR UR RU ROC C ERR RR ERR ARCET RO EC 17 The Scale Dialog BOX i5 ee de inue s dea ex amo ia RESI Rl n RUE EAR KO RN AUN REGION LR RR RR 18 Sampling Data ii cete tee ER Rex ERE RERO NURXR ERE Pe Ie xA QURE REA ENTRO eve P DUC On kd eR URR 19 Power Monitor Reset rior exito nex ERREXRRRERKERSEERSRERKDAPENRRERRERUEKANTYa aRWERNATRA E a RERERRRXE 20 erf n 20 u jii e ee 21 ZOOM c iie usd aer UXOR CLER RR CER XOT RRRGRARUUXR TRE EE EEE E EAEN ROS SR ACAD XR ROC RN Ue e A ko 22 ip ge 23 USB Measurements execute YER X TRES VERE EVER CERT EXE QU TRY VERE EVER E VERA VAN GRE Pa 24 Measuring POWER Tr 25 Battery powered device with a battery blank or bypassed battery mobile phone etc 25 USB powered device mouse keyboard etc cccceeee eee eee e ee ee eee mene 26 Measuring charging current cecceccceeeneeeeeeeceeeeeasecnaeesnmeneaaessaanaeaeeasee X4 Raga Rank a suani nnn 26 Battery powered device with active battery and connected to wall charger 26 Ba
11. or larger granularity is chosen than can display the full amount of instantaneous data the data will be averaged across adjacent samples at the smallest range possible Max Min and Avg data is shown at a given point to capture the values of that range As you increase granularity the Max Min Avg lines will converge and you ll ultimately have only one line Similarly as you decrease granularity Max Min avg lines will be calculated and displayed The offset will shift the displayed portion of the graph along the axis Both positive and negative numbers may be used IMPORTANT Data is generated and stored in memory for each point drawn to the graph If you plan to do an extended measurement more than 12 hours you should choose a timescale that is in minutes or hours and select a broader granularity to ensure efficient use of system memory Additionally if you choose 19 a fine scale such as microseconds expect a slower UI response time for other functions due to the resources required for such a high UI refresh rate To begin sampling data click the Run button To stop sampling press the Stop button Figure 18 below shows the Run button which toggles to the Stop button once it is clicked RUN Figure 18 Run and Stop toggle button The calibration indicator indicates that the unit has a valid and unexpired calibration date and functioning auto calibration hardware The heart will show green yellow or red depending on ho
12. quantity that specifies the data to be captured It can be expressed either in decimal or hexadecimal using C style Ox notation but it is most naturally expressed in hex since it is a combination of discrete bit values Details on the capture data mask are provided in the PT5 definition part of this document 57 The capture data mask stores the values you have specified in the UI to preserve your preferences in the ini file and is also how you specify what to export when using command line operation Power Monitor Exit Codes When the PowerTool is closed it provides an exit code that indicates why the software was closed The exit codes include but are not limited to e Test complete OK e Unable to find hardware e Hardware calibration failed e Disk space check fail e Capture file write error e Capture hardware error e Capture buffer overrun PT5 file format A PT5 file consists of three main sections e A fixed length header 212 bytes at file offset 0 e A variable length Status packet at file offset 272 e Multiple occurrences of variable length sample data starting at file offset 1024 All samples are recorded at a frequency of 5 kHz Each sample is an n tuple the content of which is selectable at run time The first 212 bytes are the header as follows Name Description C data type Bytes File offset headSize Header size int 4 0 Name PowerTool string 20 4 batterySize mA
13. running Option 2 Setup a windows machine with the power monitor software and Net Write a script in any desired scripting language that will execute PowerToolCmd command line calls Open ports to exec these calls remotely from your Linux Mac environment This method works well if you don t want to add a webservice wrapper and simply need the output of a power monitor run but don t need to access any data during the run Not fully supported but reported as successful We do not test or provide technical support for this configuration Option 1 Setup a virtual machine with a supported Windows Operating system and host that virtual machine from your Linux or Mac environment Install the power monitor software and drivers on the virtual machine Attach the power monitor device s directly to your Linux Mac host and access them via the Virtual Machine Monsoon has two Power Monitor Products The 4 X version of the hardware supports a voltage range of 2 01 4 55V in 0 01V Increments The Auxillary channel will support down to 1V and up to 5 0V but requires user calibration and an external power supply in order to supply voltages outside the normal range supported by the Power Monitor If you are seeing Main channel measurements you are not sure are accurate you can easily test whether your unit is still in calibration We recommend you test with 2 resistor values that will best detect both fine and course measurement calibration You wi
14. syntax RecalibrateExample exe Load Resistor Channel For example if I had a 40 12 ohm load resistor and wanted to calibrate the Main coarse channel the command line would be RecalibrateExample exe 40 12 MainCoarse Recalibration Specifications Calibrated Channel Main Fine Main Coarse USB Fine USB Coarse Aux Fine AuxCoarse Command line string MainFine MainCoarse USBFine USBCoarse AuxFine AuxCoarse Current Range 0 45 mA 45 mA 3 0A 0 45 mA 45 800 mA 0 45 mA 45 mA 3 0A Electrical Specifications of the Mobile Device Power Monitor Component Output voltage range Continuous current Integrator cutoff frequency Fine current scale range Fine current scale resolution Fine current scale accuracy Coarse current scale range Coarse current scale resolution Coarse current scale accuracy Programmable current limit range Programmable current limit accuracy Positive temperature coefficient PTC hold limit at 6 V of direct current input DCIN PTC trip limit at 6 V DCIN Thermal limit shutdown Minimum 2 01 V 300 kHz 2 86 uA 1 or 50 uA whichever is greater 30 mA 286 uA 1 or 1 mA whichever is greater 8 mA 0 7 current limit 3A Not applicable Maximum 4 55 V 4 0A 40 mA 4A 8A 1 4 current limit 6A 50C 44 Component Input voltage range Continuous current Integrator cutoff frequ
15. 3 V power supply connect a 50 Q coaxial cable to a 0 1 O sense resistor and connect that coaxial cable to the Mobile Device Power Monitor When connecting a coaxial cable e Connect the outside of the BNC connector to the high side of the sense resistor e Connect the inside of the BNC connector to the low side of the sense resistor e Enable Vout In Figure 40 below the mobile device is powered by the Mobile Device Power Monitor and its processor core power is being monitored on the Aux port with a 0 1 Q resistor In the Mobile Device Power Monitor the data for the main supply and the core supply can be displayed and analyzed simultaneously Figure 40 Example connection to Aux Port Measuring battery drain while device under test is exercised The Aux channel is the only way to use the Power Monitor to measure battery drain All other channels bypass the battery The configuration is very similar to the case above except that the 0 1 ohm sense resistor should be in line with the battery Note The AUX channel has been designed to measure across 0 1 ohm sense resistors ONLY If you have a different value sense resistor you can try performing the same calibration shown above using your value of sense resistor instead of the 0 1 ohm but results should be used only as rough measurements Connecting the Aux Channel to a Benchtop Power Supply For some use cases it may be preferable to connect an external benchtop power supply to the
16. 5 Binary data in exactly the same format that the Power Monitor creates for internal processing this is compatible with the current version of the protocol specification Please see the APPENDIX for a more detailed breakdown of the PT5 format PT4 Binary Data from the deprecated PT4 standard Differs minimally from PT5 standard CSV Comma separate values A common format that can be used to import into spreadsheet software The units saved are those specified in the graphical display settings The data is exported at the full resolution of the sampling run but only for the range specified Format e CSV PT4 Granuianty All Samples Figure 42 Time Range Export Dialog PT5 export details When you specify a subset of data to be exported to PT5 the sampling start time will be adjusted to take into account the start time for the selected region The sample time shown for the samples will start at time O from that point All data for all sampled channels will be saved in the pt5 file regardless of UI settings chosen CSV export details In the case of CSV you may specify a granularity for export The available options are all records or every 10 100 1000 or 10 000 records Data is not averaged rather only the specified subset of samples chosen will be exported resulting in a lower effective sample rate Data will be exported to CSV for any field that is selected for display in the graph When you export a subset of
17. 500 vout 3 7 keeppower noexitwait See details below to understand what the above trigger specifies The following is the syntax of a trigger code A Bn Cnt Dqrn E An Bn T Yn A Bn Cn Dnt Eqrn An The capital letters are literals n represents a numeric quantity in positive decimal or b M Nye integer values depending on the code and q r and t are place holders for code letters explained below The T is the dividing line in the trigger code between values that are interpreted as start conditions those before the T and values that are interpreted as stop conditions those after the T At the highest level the string breaks down into start code optional start qualifier T optional export flag stop code o ptional stop qualifier The following table lists the possible values of start code Code Meaning A Manual start Interpreted as Start immediately when running in command line mode Bn Start after n markers where n is a positive integer 54 Code Meaning n m Cnt Start after n time units of type t see t below where integer is a positive WV n Hm Dqrn Start when quantity q has relationship r with the number below where n is a positive decimal see q bo and AAJ t E Start immediately Only one start_code may be specified at a time Note Thes
18. C per USB specifications 27 Measured Power Data TP NY Centon es Aan beo ee ad e Ip e Tre vija v w 3 PARAE MPO vey er ON wu 9 200 RUP RU Oem iem E ran me acA ia pry Liama Comm ind metae Commer rage xad x Power sei Dwazefogiarns ler pavedi Captor dete 1117457108 e 15 9M LII Q orem m ox Figure 31 PowerTool with USB set in the Legend box and in the Capture Stats box Using USB Markers If synchronizing an external event is required the PowerTool software can support that feature over USB with Markers To use the Markers functionality Set the USB passthrough mode to Off Select the Markers checkbox in the Power Monitor UI Connect transistor transistor logic TTL signals from the device to the USB A connector on the front of the Mobile Device Power Monitor An easy way to do this is to use an old USB cable and cut it Signals that are driven on the data lines will be shown as highs 1s or lows Os on the display There are wide blue and red lines for the Markers 28 The Aux port is accessed via the bayonet Neill Concelman BNC connector on the front of the Mobile Device Power Monitor The Aux port allows you to isolate current measurements across a sense resistor Note for Aux measurements the MAI N channel must always be powered Vout enabled even though it is not being used for measurements or to power the device under test Manual Calibration of the Aux Channel Unl
19. Selection Statistics 22 Selecting a certain area with the mouse on the graph and by either double clicking or selecting the scroll mechanism on a mouse if one is available will zoom in on the selected area Note even though the screen is not updating during this time sampling is still occurring in the background The statistics are computed only for the selected area as shown in Figure 25 below When you are done looking at this area press ESC and the screen will refresh and return to displaying data as it is sampled Measured Power Data eT erase T t 4 20 V Lame w 4 cm rm mw ium i i i z i po mm i vr iow Can agp Coed 1 H x sana ome hisita Pe eck ienaa teresa NM TuT 4 i 3 o N A T a uw v PAM MEAM KM A aad es uta E gt e d rm nas i il i L we we eerie Hele tob t I 2 w DE if p vr last al my 3 J 4 5 n n cum eroe Tirmi2 m Teo amen Figure 25 Zoom Capability Triggers can be set to start and stop sampling based on specified criteria Your current trigger setting is shown in the main Power Tool GUI right above the Set Capture Triggers button as shown in Figure 26 below By default the setting is Manual To open the trigger configuration dialog select the Set Capture Triggers button CAPTURE TRIGGERS START Manual STOP Manual Set Capture Triggers Figure 26 Capture Triggers You will then be able to s
20. acketType 0x10 for Status packet byte 1 273 1 firmwareVersion Firmware version byte 1 274 2 protocolVersion Protocol version byte 1 275 3 mainFineCurrent Main current fine scale short signed 2 276 4 usbFineCurrent Usb current fine scale short signed 2 278 6 auxFineCurrent Aux current fine scale short signed 2 280 8 voltagel Voltage of selected ushort 2 282 10 channel See Table 5 mainCoarseCurrent Main current coarse short signed 2 284 12 scale usbCoarseCurrent Usb current coarse short signed 2 286 14 scale auxCoarseCurrent Aux current coarse short signed 2 288 16 scale voltage2 Voltage of selected ushort 2 290 18 channel See Table 5 outputVoltageSetting Volts 2 0 byte 1 292 20 outputVoltageSetting 0 01 61 temperature Degrees Celsius byte 293 21 status Bit flags low to high unitNotAtVoltage cannotPowerOutput checksumError followsLastSamplePacke t responseToStopPacket badPacketReceived byte 294 22 reserved Unused byte 295 23 leds Bit flags low to high disableButtonPressed errorLedOn fanMotorOn voltageIsAux byte 296 24 mainFineResistor Resistor offset ohms 0 05 offset 0 0001 sbyte signed 297 25 serialNumber Serial number ushort 298 26 sampleRate dacCalLow kHz DAC input for 2 5 V output byte ushort 300 301 28 29 dacCalHigh DAC input for
21. ain body of the battery with Kapton tape to protect from solder drippings and if needed to easily be able to remove the copper tape Figure 48 Kapton tape on body of battery 49 Cut 2 pieces of the copper tape into approximately 8 centimeters length and 5 millimeter width Taper the end to match the width of the battery terminals Widths of the terminals vary from battery to battery Place the adhesive side of the copper tape on the Voltage battery terminal Make sure that the copper tape does not make contact with the adjacent battery terminals The copper tape should sit on top of Kapton tape of the Voltage terminal and not make any contact with the Voltage battery terminal Place a second strip of tape adhesive side down over the Ground battery terminal making sure it sits in securely in the Ground battery terminal and makes good contact The copper tape should not come in contact with any other adjacent battery terminal Fold both copper tapes over the battery on the side that will be exposed when placed into the device Secure the copper tape with Kapton tape leaving the ends of the copper tape exposed Figure 49 Secured contacts Cut a 10 centimeter length piece each of the black and red 24 AWG wire Solder the black test point to the black wire to create a test lead Solder the red test point to the red wire to create a test lead Cover the solder connection to the test points with heat shrink optional
22. ays a risk of damaging the device or causing the device to heat up generate smoke or catch fire While this is unlikely be extremely careful and if anything gets hot immediately remove the battery and the power source lt lt Figure 8 A mobile device connected to the main channel 11 Using the PowerTool Software After connecting the device power up the Power Monitor and run the PowerTool software PowerTool exe The software should connect to the Power Monitor and display the user interface UI Measured Power Data ewes darmen wmm ug sors eae Anquolen Conrad ANTALT SOUNE oann onas Bie iyin jus jas Pater P pun wp ug awe De ie a A vmi LI 5e 1 ante Twaa Dor Orena ues 07 nnn M Copturs cote d uuu m Ur Tw wj ae vjs wj cx Laiad lisani em le vile eu ee 3 Tey tae Trees m vile vja v evel E v fy vin vi eve fon waro o Y i x ass Se 65535 Q Libet Figure 9 PowerTool software UI after connecting to a device The revisions of the hardware HW ver firmware FW ver and software SW ver should be compatible for consistent and repeatable results and performance If the Power Monitor software is updated the firmware will need to be confirmed for compatibility The Power Monitor will prompt the user to indicate that a new firmware is required to run this revision of software If this occurs then the firmware FW ver
23. data to CSV your start time will reflect the offset from the start of your run 38 Format e CSV PT4 Gronuenty ESTES Time Range Every 10th Sample Every 100th Sample Every 1000th Sample Every 10000th Sampi Figure 43 CSV Granularity Export Dialog Note If you want the PT5 format unless you want to limit the range of data saved we recommend you SAVE vs EXPORT as it is a much more efficient process Functional Description of the Power Monitor To measure the current accurately a dual range self calibrating integrating system is used Each channel has two current ranges with a 16 bit analog to digital converter ADC one with a high resolution range and the other with a low resolution range Software continuously calibrates each of these and selects the proper range during measurement The dual range scheme works because mobile devices are usually in standby mode and drawing only a few milliamps of current or they are running above 100 milliamps The Power Monitor must be very accurate when the current is low but may be less accurate as the current increases Each sample is integrated over its 200 microsecond sample period so that even a brief high current pulse is captured Depending on system capacitance and other factors the fastest transient pulses are around 20 microseconds The integrator sums up these fast pulses so that an accurate assessment of the average current is maintained The unit is self calibrating O
24. devices The PowerTool software and the Power Monitor hardware can analyze the power on any device that uses up to a 4 55V Battery Electrical engineers and software developers can utilize the PowerTool software and the Power Monitor hardware to optimize the design and analyze the performance of their mobile devices Measured Power Data INTALE SORE DS2 EO uM as de huw 4u ob o CU ient LE Aman ves Jha Teo wija vja wl cx Shes LR m SOEUR ge mum Avv eee UINTI w wiles y cx 2 Cela RUN Oo 159 Vi Gown A omen Tee m vila vja w we Cow 2r fie tone 1 a nte 7 some ie e STOP or meme Lnseame 7 nnn wae fy vli v OF p Focused mie oie mmo 159i tn i x i E Akqaa bor Corrmdes Meda Cepturz sete n 65535 Q Lbaiscck Figure 1 Graphical user interface GUI for the PowerTool software The Power Monitor can measure data on three channels Main USB and Auxiliary The Main channel is what most users will use for their measurements A is provided as is an The GUI details are described below for the Main channel but largely apply to all sampling sources Cases where they differ are called out in the appropriate sections on USB or AUX measurements USB Chianti Main Channel Figure 2 Mobile Device Power Monitor Hardware and Software Requirements for the Development Workstation A dedicated Windows platform workstation is required to be used with the Power Monitor to achieve the optimal perfor
25. e Device Power Monitor and connect an additional USB cable from the front of Mobile Device Power Monitor to the development workstation as shown in Figure 28 below In most cases you will still need to keep the main channel connected and enabled as well This will be discussed further below Figure 28 USB device connection including main channel connection 25 There are 3 primary modes when using the USB Channel USB ON OFF and AUTO For people using active devices such as phones most will want to use AUTO e Auto Setting the USB passthrough mode to Auto enables a USB connection from your device to the computer which allows you to download files configure test programs charge the device etc Once sampling is started the direct USB connection is disabled charging over USB is disabled and samples are measured without the interference of USB charging As soon as sampling is stopped the direct USB connection is re enabled and data can once again be transferred to and from the device over USB A main channel connection with Vout enabled is required in this setting e On Setting the USB passthrough mode to On enables the USB connection and records the current flowing through the USB connector on the front of the Mobile Device Power Monitor The main channel connection is not required when using this configuration as power is provided through USB Note the main channel Vout should still be enabled to ensure proper readings e Off Se
26. e button Start the PowerTool application and select the Reflash option which is enabled whenever a Power Monitor device in boot mode is detected ad Please select a device Refresh View Only Exit Reflash Figure 4 PM Flash Select Option Click on the Load button and browse to the Firmware folder where the PowerTool application was installed and select the PM RevX ProtXX VerXX Boot hex file Note X is a placeholder for the proper version information for a given firmware file for example PM RevD Proti7 Ver20 hex Click on the Write button Wait until the Status shows Write complete Click on the X in the upper right of the window to exit when you are done Power off and then power back on the Power Monitor so you now have a green light Flefiseh Figure 5 PM Flash Window Be sure that the power switch on the front of the Power Monitor hardware is not engaged The hardware should not be powered up The power switch should be in the outward position not the inward position Connect the supplied 6 VDC 5 Amp power supply to the back of the Power Monitor and an alternating current AC power supply On a development workstation that is compliant with Full Speed USB 2 0 connect a USB cable to the USB connector on the back of the Power Monitor hardware and connect the other end of the USB cable to the development workstation Do not connect to an external USB hub device Figure
27. e export codes changed values in 4 0 4 12 to add the support to start based on time Codes that previously used Cqrn now will use Dqrn Codes that previously used D will now use E The possible values of optional start qualifier when present are Code Meaning n Hn n Hn An Delay capture samples after trigger where is a positive integer AAJ n u n Bn Capture samples before trigger where is a positive integer Only one optional_start_qualifier may be specified at a time If you specify a start_code of A manual or E immediate a start qualifier of Bn capture samples before trigger will be meaningless and will be ignored If your start trigger condition is met before the specified number of capture before samples are available you will have only those measured before your start condition triggers The possible values of lt optional_export_flag gt when present are Code Meaning AAJ n Yn Auto export CSV file after stop is optional If not specified or a value of 1 is used all samples will be PX If n is specified every n th sample will be written to the CSV file Allowed values for n is 1 10 100 1000 or 10000 Note CSV export support were added in version 4 0 4 4 Prior to that version this feature was not implemented Granularity of export was added in version 4 0 4 12 The following table lists the possible values of stop code Code Mean
28. econds ms The shortest time allowed is 1 msec The longest time allowed to be specified is equivalent to 4 weeks For example a trigger code DBA300A500TYC20000A500 would be interpreted as follows 56 Code Meaning DBA300 Start capture after average power falls below 300 mW A500 Delay capture 500 samples after trigger T Fixed delimiter Y Auto export CSV file after stop with all available samples C20000 Stop capture after 20000 samples A500 Capture 500 samples after trigger If no trigger code is specified at all a default of ATA will be used which is how the main GUI PowerTool application starts This is not desirable for command line operation as it causes it to run in manual exit mode and there is no way to issue a signal to exit the application from the executing command line When running in command line mode you should be sure to specify a TRIGGER setting with a stop code of other than A The main PowerTool GUI application has the ability to help you formulate trigger codes for use with the command line version of the application From the PowerTool GUI application select Set Capture Triggers put in your desired settings and then select Code The resulting trigger code will be displayed in a separate window Frm Tend Deecfaguen Tenit gasto COURS EPH Fal SES Qe mee Figure 53 Using the GUI to get a trigger code The capture data mask is a 16 bit
29. ency Fine current scale range Fine current scale resolution Fine current scale accuracy Coarse current scale range Coarse current scale resolution Coarse current scale accuracy VBUS PTC current hold limit VBUS PTC current trip limit VBUS capacitance to GND Min 2 1V 300 kHz 50 uA 2 86 uA 1 or 50 uA whichever is greater 30 mA 286 uA 1 or 1 mA whichever is greater 0 52 A 1 04 A Max 5 4 V 0 8 A 40 mA 4 5A 0 85A 1 7A 45 Component Input voltage range Differential input voltage Integrator cutoff frequency Fine current scale range Fine current scale resolution Fine current scale accuracy Coarse current scale range Coarse current scale resolution Coarse current scale accuracy Aux side capacitance Aux side input current Min 1 0V 300 kHz 0 mA 2 58 UA 1 or 50 uA whichever is greater 10 mA 100 uA 1 or 1mA whichever is greater 22uF 20 Not applicable Max 5 0V 0 1 V 12 mA 500 mA Vin 1V 1A Q Vin 2 1 8 V 1 of 0 1 Q resistor current 46 Battery By pass Modification I nstructions The battery bypass provides a means for the device under test to communicate with the battery while drawing power from the Power Monitor The connection is created by insulating the Voltage terminal on the battery and creating a direct bypass between the Power Monito
30. ent version of the protocol specification Please see the APPENDIX for a more detailed breakdown of the PT5 format Update from PT4 to PT5 moves from 16 bit to 32 bit measurements in order to support more precision in the microamp range PT4 Deprecated Older export format will be converted into PT5 format before displaying PT3 Deprecated Older export format Will be converted to a PT4 format before displaying The PT5 file format when saved contains data at the maximum time resolution regardless of the Capture Settings Thus when you read this file format in you will have the full set of data from your recorded session The data exporting features of the Power Monitor allows the user to save or export data for the following e The entire power measurement run e Data selected and highlighted e Data currently displayed on the screen e In the case of CSV the granularity you specify exported When you SAVE data it will save in a PT5 format and will save all field data at the maximum time resolution regardless of the capture settings or what is displayed on the screen A PT5 index file CD5 will also be saved to optimize the process of recreating the graphical display data when you re import the PT5 When you EXPORT data it can be exported in the file formats shown below You will have the option to select to export only the highlighted or displayed region or all data sampled 37 File format Description PT
31. f these counts are reset to zero when a run is restarted These counts are useful to determine how stable the connection is If the dropped packets are greater than one percent of all samples or if there are more than one or two dropped connections per hour then it is likely that the development workstation has other applications running that are causing delays Closing these applications or installing the PowerTool software on a clean machine should solve these issues and reduce the dropped samples and packets APPENDI X Frequently Asked Questions The Power Monitor is specifically designed for the Microsoft Windows operating system and relies on custom device drivers only available for Windows We are not presently looking at a solution that will run natively on Linux or Mac We understand some users have environments that are primarily Linux or Mac The following are our recommendations Fully supported Option 1 Setup a windows machine with the power monitor software Net and a webserver Write a simple webserver wrapper using the Power Monitor API Expose this webservice as desired and call it from within your Linux or Mac environment You will connect your power monitor device s to the windows machine and control them remotely through your Linux environment over the webservice This is the most robust and flexible method to complete integration for automated testing especially if you need real time access to data while the sampling is
32. h channel and field is represented by one bit in the mask The mask is thus the bitwise OR of the channel s and field s to be captured The bit values for the channels are as follows Mask Channel 0x1000 Main 0x2000 USB 0x4000 Aux The bit values for the fields are as follows Mask Field Mask Field Mask Field 0x0100 Min Voltage 0x0010 Min Current 0x0001 Min Power 0x0200 Avg Voltage 0x0020 Avg Current 0x0002 Avg Power 60 0x0400 Max Voltage 0x0040 Max Current 0x0004 Max Power The data is bitwise OR d together to specify what should be captured For example 0x1777 default Main channel all data for all fields 0x1020 Main Channel Average current only 0x1222 Main Channel Average data for all fields 0x2002 USB Channel Average power only 0x1637 Main Channel Avg and Max Voltage Min and Avg Current all Power data 0x2777 Main and USB channel all data for all fields The file is padded with zeros until offset 272 1444 128 where a Status packet from the Power Monitor hardware is recorded as follows Name Description C data type Bytes File Packet offset offset packetLength Length 1 of packet This byte 1 272 0 is variable All implementations should use the packetLength to determine where to pull the checksum p
33. h int 4 24 captureDate System DateTime binary long 28 serialNumber Power Monitor serial string 20 36 number calibrationStatus OK 0 or FAILED 1 CalibrationStatu 4 56 s enum voutSetting Typical 0 Low 1 High VoutSetting 4 60 2 or Custom 3 enum voutValue Main voltage output float 4 64 58 Name Description C data type Bytes File offset hardwareRate Hz int 4 68 softwareRate Hz float 4 72 powerField Data selection for Power SelectField enum 4 76 currentField Data selection for Current SelectField enum 4 80 voltageField Data selection for Voltage SelectField enum 4 84 captureSetting Trigger specification string 30 88 swVersion PowerTool version string 10 118 runMode NoGUI 0 or GUI 1 RunMode enum 4 128 exitCode Application exit code int 4 132 totalCount Count of data samples long 8 136 statusOffset File offset of Status Packet ushort 2 144 statusSize Size bytes of Status ushort 2 146 Packet sampleOffset File offset of Sample data ushort 2 148 sampleSize Size bytes of each ushort 2 150 individual sample initialMainVoltage See Table 5 ushort 2 152 initialUsbVoltage See Table 5 ushort 2 154 initialAuxVoltage See Table 5 ushort 2 156 captureDataMask Mask indicating which data ushort 2 158 is being captured see capturedatamask sampleCount Sample count ulong 8 160 missingCount Cou
34. he voltage at the red and black terminals is never exactly at the programmed voltage This is because there is an internal 0 056 O sense resistor in series with the regulator For example if the device is drawing 1 A when Vout equals 3V expect to see 3 1 056 2 944 V Figure 12 below shows this sense resistor in series with the regulator in relation to the red and black terminals Curent Sense DC IN 6V Adjustable Regulator RED Terminal BLACK TERMINAL Figure 12 Sense resistor in series with the regulator in relation to the red and black There is resistance in the wiring that can lower the voltage at the device The resistance of the wiring plus the sense resistor is similar to the resistance of the lithium battery in the device batteries are usually about 0 12 Q The resistance of 20 gauge wire is 0 012 Q ft so if the cables are 20 gauge and 1 foot in length that adds another 0 024 O in addition to the contact resistance POWER MONITOR Figure 13 Vout LED indicator If the power up is successful the green Vout LED indicator in Figure 13 above will power up This LED is connected directly to Vout so the light will dim slightly if the voltage is lowered If this LED does not power up then Vout did not power up properly so there are other problems Low Battery Warning on Device In some cases your device under test may give a lower battery charge warning or not power up In those cases increase the Vout va
35. ice under test is once again accessible from your computer and data may be uploaded and analyzed 26 USB powered device mouse keyboard etc USB A cable connected from front of power monitor to device USB B cable connected from front of power monitor to computer USBPassthrough ON Main channel is not connected but is powered Vout enabled USB channel selected for display Figure 30 USB powered device Measuring charging current Battery powered device with active battery and connected to wall charger USB A cable connected from front of power monitor to device USB B cable connected to DCP dedicated charging peripheral wall charger This charger must NOT provide more than 1 amp or you will risk destroying your power monitor USBPassthrough ON Main channel is not connected but is powered Vout enabled USB channel selected for display In this configuration you can measure how much current your device is pulling while charging This allows you to verify a charger is able to deliver the rated amount of current up to 1 amp Battery powered device with active battery and connected to computer USB A cable connected from front of power monitor to device USB B cable connected to computer USBPassthrough ON Main channel is not connected but is powered Vout enabled USB channel selected for display In this configuration you can verify that your device is only pulling 2 500mA when connected to a P
36. ield of the Status packet file offset 296 If the bit is set the voltage is the Aux channel voltage otherwise it is the Main channel voltage The current measurements can each be either on the Fine or Coarse scale independently of each other and the scale can change from one sample to the next For fine scale measurements each tick represents 1 uA microamp whereas for the coarse scale each tick represents 250 uA A coarse measurement always has the low order bit set For fine measurements the low order bit is always clear After determining the scale the low order bit should be cleared before calculating the current For voltage the two low order bits are the two marker channels The lowest bit is Marker 0 the next bit is Marker 1 These bits should be masked off before calculating voltage The layout of each sample is as follows Field C Data Bytes Tick value Present if Type Main Current Int32 4 1 uA fine captureDataMask amp USB Current Int32 4 1 uA fine captureDataMask amp Aux Current Int32 4 1 uA fine captureDataMask amp Main or Aux ushort 2 See Table 5 Always Voltage and unsigned Markers Table 4 Sample layout The following table lists the value of each voltage tick in microvolts uV depending on the hardware revision level and the channel 64 Hardware Main USB Aux Revision A 62 5 uV tick 62 5 uV tick 62 5 uV tick B 125 uV tic
37. ike the Main and USB channels the AUX channel has only preliminary calibration and must be user calibrated prior to taking any measurements This requirement is due to the dependency of measurements on your specific cables sense resistor and configuration We recommend that you go out from the sense resistor to the load then load to Power Monitor Main then Power Monitor Main to Sense Resistor This places the sense resistor load in line with the power monitor main channel which is far more precise We recommend a 4 0V output from the Power Monitor with a 409 load That should yield exactly 100mA mathematically I V R but doesn t take into account lead resistances sloppy tolerances etc The calibration process will zero out these interfering resistances Figure 32 shows the Power Monitor when wired for calibration This is using a precision adjustable load of 402 as the load and the Power Monitor s Main Channel is the Power Source Note the 1 ohm sense resistor across the aux channels as shown in Figure 33 You should use the same wires for calibration that you plan to use for actual measurement to ensure you are accounting for all system resistance 29 Figure 32 AUX Calibration 30 POWER MONITOR Figure 34 0 1 ohm sense resistor If you don t have an adjustable load you can use any resistor with a value of approximately 20 40 ohms Be sure to measure the resistor so you know its exact value
38. ing A Manual stop Warning do NOT use when running in command line mode or you will need to manually kill the process to exit the application AAJ n AAJ n Bn Stop after markers where is a positive integer Cn Stop after n samples where ne is a positive integer AAJ n Dnt Stop after n time units of type t see t below where is a positive integer WV n m r Eqrn Stop when quantity q has relationship with the number below where n is a positive decimal see q Aan and AAJ r Only one stop_code may be specified at a time 55 The possible values of optional stop qualifier when present are Code Meaning An Capture n samples after trigger where n is a positive integer The possible values for the quantity code e o a o Meaning Min power Avg power Max power Min current Avg current Max current Min Vout T OoO nimo o u Avg Vout eH Max Vout Power is calculated in mWatts Current is calculated in mAmps Voltage is calculated in Volts wv Hn q are The possible values of relationship code r are as follows Code Meaning gt B lt C Rises above D Falls below The possible values of the time unit code t are as follows Code Meaning A Seconds s B Millis
39. k 125 uV tick 62 5 uV tick C or later 125 uV tick 125 uV tick 125 uV tick Table 5 Voltage units In order to account for the time gaps caused by calibration cycles delays in communication between the power monitor and the PC host or other causes the PowerTool software inserts missing data indicators For current measurements missing data is recorded as 0x8001 while for voltage the missing value is OxFFFF Should a missing value be encountered within a given sample the entire sample should be treated as missing but the 200 uSec of time for the sample should be accounted for PtSReader and Pt4Reader are sample C console applications included with the installation Look in the DeveloperExamples directory where you installed the Power Monitor application The DeveloperTools solution will load the PtSReader project Alternatively the src Pt5bReader subdirectory contains the project file PtSReader takes a pt5 filename as an input argument and outputs the file s contents to the console 65 This page purposely left blank
40. ll need to get 40 ohm and 120 ohm axial resistors and measure them with an ohm meter to determine their exact value 41 Power off the power monitor connect the 40 ohm resistor across the main channel leads power on the power monitor and Power Tool software enable Vout at 3 7 volts and start a sampling run Figure 45 Testing Main channel calibration The current values you see should match what you calculate form I V R within the tolerance of 0 02mA For example if you have a resistor that measures 40 1 ohms and you are using 3 7 volts Ohm s law tells us your measured current should be 0 092269 amps or 92 27 mA The Power Monitor should give you values within 0 02 mA of this calculated value Once you have tried with a 40 ohm resistor repeat the same process with your 120 ohm resistor If you find your unit is out of calibration please contact us at info msoon com to have it recalibrated 42 Yes The procedure for this is to 1 Have two load resistors available to calibrate the fine and coarse channels We recommend a 40 ohm load for the coarse channel and 120 ohm load for the fine channel 2 Locate the file RecalibrateExample in the Developer Tools folder This is a command line tool that will need to be placed in the same directory as PowerTool exe which is normally located at C Program Files x86 Monsoon Solutions Inc Power Monitor 3 Connect the appropriate load resistor and run with the following
41. lue This is particularly likely to be seen if a battery blank is being used instead of a lithium battery with a bypass Over Current Error from the Main Power Supply Sometimes an over current error occurs when powering up When an over current error occurs the power LED displays as amber An over current error can happen when the e Device is attached backwards e Device is attached incorrectly e Device has a lot of capacitance a very high in rush current e Device has an unusually high run current Figure 14 Amber LED indicator for over current Note Be sure to check for a backwards connection before overriding the over current limits 15 Protecting the Main Power Supply from an Over Current Error The main power regulator can source 3 0 A of continuous current and 4 5 A of peak current In order to protect incorrectly connected devices from damage a carefully controlled power up sequence is used The default sequence is as follows e Power up with no current limit for 20 milliseconds e Run for 1 second with the current limit set to 500 mA e Run continuously with the current limit set to 4 5 A The parameters in the dialog box below are used for device under test power on e Power up time This specifies the power up time when no current limit is applied to the Mobile Device Power Monitor e Power up Current Limit If the Power Up Time is set to default this parameter will allow the selected current to be supplied t
42. mance and results e Windows Vista Windows 7 or Windows 8 XP support discontinued after 4 0 4 11 e 1024x768 or greater screen resolution e 1 GHz 32 bit x86 or 64 bit x64 processor e 4 GB of system memory e 40 GB hard drive with at least 15 GB of available space e Version 4 0 4 12 and 4 0 5 1 require Net 4 5 Version 4 0 4 11 requires Net 4 0 Versions 4 0 4 0 4 0 4 10 require Net 3 5 e Full Speed USB 1 1 USB 2 0 integrated chipset or PCI PCI Express add in card e USB 3 0 or Downstream Charging ports are recommended for Front panel connections USB Hubs should not be used with the Power Monitor I nstalling the PowerTool Software Drivers and Connecting to the Power Monitor Hardware Prior to installing the latest version uninstall any previous version of the Power Monitor Software from the Control Panel Create a new temporary folder on the development workstation under the root directory C Copy PowerTool zip to the development workstation Extract the contents of PowerTool 4 X X X zip to the temporary folder Run PowerTool Install exe Follow the on screen prompts to install the PowerTool Software After the PowerTool application has been installed and this is the first time the workstation will be running the PowerTool application you will need to install two drivers the Power Monitor driver and the Firmware driver Instructions are as follows Power on Power Monitor in normal mode Green led should be on
43. ne cycle out of every 1000 cycles is used to run either a zero current calibration or a reference current calibration Software uses these measurements to null out the offset and gain errors in the system Because this is done automatically it compensates for slow temperature changes during the measurement run The only part not included in the self calibration is the sense resistor These resistors are calibrated at the factory and the calibration values may be adjusted and saved by engineers using the Parameters dialog box The Power Monitor has an overflow buffer that can hold six packets of 128 bytes each During transfer if the development workstation cannot read the data fast enough then this buffer will begin to fill up and samples may be lost The received data is concatenated so the line appears continuous To account for the lost samples the protocol contains a 16 bit counter that tracks the number of lost samples The running total of lost samples is displayed in the UI as shown in Figure 44 below 0 of Figure 44 Dropped Samples Because the dropped samples are less than one percent of a run the error is minimal Usually this loss of data is less than 0 1 percent However sometimes on long runs or on 39 loaded systems the dropped sample count can exceed 65 000 When this occurs the PowerTool lost communication for more than 10 seconds A count of dropped connections is maintained in the UI as shown above in Figure 44 Both o
44. nt of missing samples ulong 168 sumMainVoltage Sum of main output voltage float 4 176 V Divide by sampleCount missingCount for Average sumMainCurrent Sum of main current mA float 4 180 sumMainPower Sum of main power mW float 4 184 sumUsbVoltage Sum of USB voltage V float 4 188 sumUsbCurrent Sum of USB current mA float 4 192 sumUsbPower Sum of USB power mW float 4 196 sumAuxVoltage Sum of Aux voltage V float 4 200 sumAuxCurrent Sum of Aux current mA float 4 204 sumAuxPower Sum of Aux power mW float 4 208 Total length 212 Table 1 Header layout All strings are length prefixed one byte and are blank padded to their fixed length suitable for reading with BinaryReader ReadString The lengths listed include the length byte The enumerations are as follows Enumeration Definition Description CalibrationStatus OK 0 Status of calibration Failed 1 VoutSetting Typical 0 3 7 V Type out Vout setting Low 1 3 35 V High 2 4 2 V Custom 3 SelectField None 0x00 Masks describing which Avg 0x01 channel Min 0x02 Main Aux1 Aux2 Marker Main 0x08 Avg Min Max are being Usb 0x10 recorded Aux 0x20 Marker 0x40 RunMode NoGUI 0 Whether or not PowerTool GUI 1 was running in GUI mode Table 2 Header enumerations The captureDataMask indicates which of the three data channels are captured Main USB or AUX and which aspects of Voltage Current and Power fields are captured Eac
45. o the buffer Switches shown in italics are required in command line mode Switches begin with hyphen or forward slash The switches are as follows and are case insensitive Switch Description LOADFILE file Same as fileName above ISTART Sampling starts immediately This has the same effect as setting the trigger start code to D in command line mode TRIGGER string See section on TESTMINPOWER value Return success if average power mW is gt value TESTMAXPOWER value Return success if average power mW is lt value SAVEFILE file Save capture buffer to this file The specified filename must include the pt5 extension CAPTUREDATAMASK value See section on capture data mask NOHARDWARE View only mode don t connect to a device SERIAL value Connect to a specific device Default first device found 53 KEEPPOWER Leave Vout enabled on exit VOUT value Vout voltage value Default 3 70V TEMPDIR path Override temporary directory Default My Documents PowerTool USBPASSTHROUGH mode USB passthrough mode AUTO ON or OFF USB mode Default AUTO NOEXITWAIT Program exits without waiting for Press any key EXITCODES Lists program exit codes H HELP Lists command line switches A sample full command line argument would be be PowerToolCmd exe savefile datafile pt5 trigger DBA300A500TYC20000A
46. o the device for 1 second e Run time Current Limit This parameter specifies what the maximum current that can be sourced by the Mobile Device Power Monitor while it is sampling or in Run mode If a device does not power up with this default profile the profile may be adjusted Click on Parameters in the UI and the dialog box shown below in Figure 15 16 S Power Tool NoOlats B Measured Power Data tb ranp ime Vier Pyare a amp Sue HS ec ee Sere Aides tide m m TIAE chee lero inaani Pomp coment ie 4 oS nexa em g Man poore ponerme ae tc QUE dew T jaan Glue a v Doce tae o m BINAE USE oni 20 2 oce oeeeee ftn aw Ace LEED dew rence E te b c dae r4 ote 1 t a lare dirt E pasera re T Len obo y 2900 Moune Aras To Ds 10565 ov DW m a pi A 3 d te LI 2 ac Eae Dee Shan Pus fw Mente iue S On 3A 00872 don m gt Misa B Ax kisse VXTAGE SRLS DS lu wW ue 4 ve um EA PTR eee OSAANE VADEDE RUN er Meri ike 77 Medo Ps on _ mevn L7 wees few eec AA Dorn Maren ivi z PETT us Ax qabijun Curso hula Capi dale e C535 LT Figure 15 Dialog box for Set Parameters In addition to changing the power up and runtime current limits you also can specify the temporary directory that will be used to store sample data and whether to automatically scan for Power Monitor device connection changes For most users Enable Device Scanning should be left
47. oarseResistor Default resistor offset ohms 0 10 offset 0 0001 Default resistor offset ohms 0 05 offset 0 0001 sbyte signed sbyte signed 320 321 52 53 defUsbCoarseResistor Default resistor offset ohms 0 05 offset 0 0001 sbyte signed 322 54 defAuxCoarseResistor Default resistor offset ohms 0 10 offset 0 0001 sbyte signed 323 55 eventCode Event code 0 none 1 USB connection lost 2 too many dropped samples 3 reset requested by host byte 324 56 eventData Supplementary event data interpretation depends on eventCode ushort 325 57 reserved Reserved for future use varied varied 327 59 checksum Checksum byte byte varied varied Total length varied Table 3 Status packet layout The file is then padded with zeros up until file offset 1024 where the sample data begins 63 Beginning at offset 1024 sample data is recorded at a rate indicated in the Status Packet Each sample consists of up to four two byte quantities three of which are optional depending on the captureDataMask field at offset 158 The total count of samples is given by the totalCount field of the header The four quantities are the current measurements for the Main Usb and or Aux channels and a voltage for the channel indicated by the voltagel sAux bit of the leds f
48. pecify both start and stop conditions Trigger Settings 3 Start i Stop Manual 9 Manual After 2 Markers After 2 Markers After 10 S After 20000 Samples Ater Ava Pwr 7 300 mW Mter 20 Immediate After Avg Pwr 300 mW Capture 500 samples before trigger F Capture 500 samples after trigger M Delay capture 500 samples after trigger 7 Export to CSV File All Samples Cancel Code Figure 27 Trigger Settings Dialog Important Notes If you specify to capture samples before a start trigger and the start condition is such that there aren t that many samples available before the trigger your data will only contain the number available If you delay capture too many samples after your start trigger and your stop trigger condition matches you may not get any samples in your data Triggers are evaluated as batches of samples are processed so the stop and start times will vary within a fraction of a second of the specified time Trigger settings are saved in your ini file and will be preserved in your next session 23 24 Once you have saved your settings you will see your choices reflected in the text on the Power Tool GUI You must still select RUN and then the trigger conditions will start evaluating In addition to the Main channel two other channels are available to do sampling One of these is used for monitoring USB power and current draw To use the USB channel connect the USB device to the front of Mobil
49. r Vout to the device The circuit is completed by connecting directly to the Ground terminal on the battery In order to modify the battery to properly connect to the Power Monitor please follow these steps Note Wear safety goggles at all times while working with exposed battery terminals and wiring Connecting the Mobile Device Power Monitor to a device to collect current measurements can be complicated and dangerous Be sure that the area you are conducting power measurements is protected from fire dangers and do not have flammable items nearby These measurements are at your own risk and these procedures are not guaranteed to prevent damage or injury These are the items you will need 1 Polyimide High Temp Tape Kapton Digikey P N 3M541312 ND 2 Copper tape foil Digikey P N 3M1181A ND 3 24 AWG stranded wire Red and Black 4 Looped test point Black Digikey P N 5011K ND 5 Looped test point Red Digikey P N 5010K ND 6 Heat shrink to cover the connection made between the wire and the test points optional 7 Soldering iron 8 Utility knife X Acto 9 Epoxy optional Locate the Voltage and Ground terminals on the battery as shown in Figure 465 If they are not labeled verify using an ohmmeter voltmeter Figure 46 Battery Terminals Cover the Voltage terminal with insulating Kapton tape to isolate it from any ground connection Figure 47 Kapton Tape on Terminals 47 48 Cover the m
50. rols work in concert with each other They control which measurements of which channels are displayed on the graph and included when exporting measurements Each pixel on the graph represents a variable number of samples depending on the timescale selected The max graph shows the maximum value of those samples while the min graph represents the smallest value recorded The average represents the average of all samples taken during the time represented by that pixel The USB Passthrough Mode has three settings e Auto Setting the USB passthrough mode to Auto enables a USB connection from your device to the computer which allows you to download files configure test programs charge the device etc Once sampling is started the direct USB connection is disabled charging over USB is disabled and samples are measured without the interference of USB charging As soon as sampling is stopped the direct USB connection is re enabled and data can once again be transferred to and from the device over USB A main channel connection with Vout enabled is required in this setting e On Setting the USB passthrough mode to On enables the USB connection and records the current flowing through the USB connector on the front of the Mobile Device Power Monitor The main channel connection is not required when using this configuration as power is provided through USB Note the main channel Vout should still be enabled to ensure proper reading
51. rotocol All control of the Power Monitor happens on the development workstation The development workstation issues commands and the Power Monitor responds to the commands by completing the operation and sending back a Status packet The Status packet contains the entire current state of the machine except when sampling When sampling the PowerTool application sends a Start packet to the Power Monitor and then the Power Monitor sends sample packets continuously back to the PowerTool When sampling is to be stopped the PowerTool application sends a Stop packet The Power Monitor stops sampling and responds with a Status packet Generally when the Power Monitor is not sampling the PowerTool application requests periodic status packets in order to refresh its display Command Line Operation of the Power Monitor Version 4 0 3e or later includes a console application PowerToolCmd for execution in batch files scripts It connects to your Power Monitor device without opening a GUI and will execute based on your command line settings The majority of features exposed via the PowerTool API and GUI are available via the command line version For additional programmatic access see the PowerTool Automation QuickStart Guide included in the docs directory of the installation which documents our full Net Interface The command line format is PowerToolCmd fileName switch switch where fileName is the optional name of a PT5 file to be loaded int
52. s e Off Setting the USB passthrough mode to Off disables the USB connection The main channel connection with Vout enabled is required in this setting 18 The Scale dialog box controls how the data is displayed in the graph Unit Units tick Tids Offset Tme mina kamar Sz Power mw v s v 0 00 Curent m v 9 c Votage V r 0 00 Figure 17 Dialog box for the display Scale The time scale is always shown along the X axis The Power Current and Voltage scales are shown along the Y axis depending on the data selected in the Legend dialog box The Unit dropdown lets you select the unit to be used for display The Units tick dropdown specifies the granularity of each tick For example if you specify a unit of min and a units tick of 2 there will be a tick for 2 minutes 4 minutes and so on The smaller the number you select the finer the granularity The Ticks dropdown specifies the number of ticks to be displayed The Units tick multiplied by the ticks will determine the range of data you will see on the graph at any given time The data that is displayed is calculated based on the granularity of the timescale you have chosen If the full resolution of data sampled can be displayed in the UI then instantaneous data will be plotted and Average Min and Max values will all be identical as there is nothing to smooth or average over If the timescale is such that a larger time range
53. s5s 5s3s5sssssstsesecnsonsesonotos pe e 95 90 7 8 9 10 11 12 13 14 15 16 Time s 3 mA Figure 38 Example graph post calibration 33 Automation Calibration of the AUX Channel The Aux channel can be manually calibrated using the Developer Tool Example program RecalibrateExample through the following procedure 1 Connect a 0 1 ohm sense resistor and have two precisely measured load resistors available as per the instructions for manual calibration As before we recommend approximately 40 ohms and 120 ohms 2 Connect the 120 ohm load resistor 3 Place the file RecalibrateExample exe in the same directory as PowerTool exe This will normally be in C Program Files x86 Monsoon Solutions Inc Power Monitor 4 Run in the command line RecalibrateExample exe 120 AuxFine Where 120 will be replaced with the precise value of your load resistor 5 Remove 120 ohm load resistor and attach 40 ohm load resistor 6 Run in the command line RecalibrateExample exe 40 AuxCoarse The primary use cases for the AUX Channel are described below Isolating current draw measurements at a specific point in a circuit in the device under test Suppose the LT1129 shown below in Figure 399 sits on a mobile device PCB and the current supplied to the 3 3 V supply needs to be measured 50 OHM Coax Connect to Power Monitor BNC Figure 39 Schematic of the Aux port connection In this situation to measure the current supplied to the 3
54. tes May 2007 1 0 Initial release November 1 2007 1 1 Updated features and added PT4 formats January 16 2008 1 2 Updated path for Power Monitor Install directory July 15 2008 1 3 Updated and added features November 9 2009 1 4 Corrected web site links June 11 2012 1 5 Consolidated manual June 18 2012 1 6 Updated Command Line usage directions and PT4 file reader example June 21 2012 1 7 Documented support for CSV and DCF export from Command Line version and triggers June 28 2012 1 8 Updated pt4 reader example It is now distributed as source code rather than inline in the document July 26 2012 1 9 Updated application screenshots Updated system memory requirements Aug 9 2012 1 10 Updated information on recommendations for extended duration testing and change in default time axis Aug 13 2012 1 11 Updated to reflect USB channel changes November 28 2012 1 12 Updated to reflect ability to disable automatic port scanning April 4 2013 1 13 Updated to reflect Net dependencies May 29 2014 1 14 Updated to clarify capture data masks and export capabilities Various clarifications throughout the document including significant documentation updates for USB and AUX channels Added FAQs September 14 2015 1 15 Updated to support Software V4 0 5 1 I ntroduction The PowerTool software and the Power Monitor hardware provide a robust power measurement solution for mobile
55. to ON If you change this to OFF communication across COM 1 and the other COM ports will be minimized but no automated detection of addition or removal of Power Monitor devices will be done If you are running with Enable Device Scanning OFF and add or remove a Power Monitor you will need to switch back to Enable Device Scanning ON or restart your PowerTool application to see the current state of available Power Monitor devices 17 The Legend dialog box controls which channels are displayed and what kind of data is shown in the graph as well as the USB Passthrough Mode VOLTAGE SOURCE DISPLAYED CHANNELS 9 Man iv Main use Aux USB PASSTHROUGH DISPLAYED MEASUREMENTS o Power Awa z On V Currestavg V Voitase Avg 9 Auto LIT Min Current Min Voltage Min 2 es i or ee Current Max Voltage Max Parameters Restore Defawits Osplay Markers Figure 16 Dialog box for the display Legend With every sample the Power Monitor returns current measurements from all three channels and a single voltage measurement The Voltage source control selects whether these measurements will come from the Main or Auxiliary channel USB voltage measurements are taken at the beginning of the sampling run and presumed to be constant throughout sampling In order for a voltage source to be selected it must first be enabled as a displayed channel The displayed channels and displayed measurements cont
56. ttery powered device with active battery and connected to computer ssss 26 Using USB Markers ceni se RD Re See IER a peianetasath einai ea ED ARAS ERE TA ODER ER MR Eds 27 Auxiliary Port AUX iuc siiussest e etiuet ea vere E exei taper terc hae Re ke Ye xa aka ER d a RE ER iP CREER Y ini 27 Manual Calibration of the Aux Channel cc rn enne nnn nnn 28 ER 29 Automation Calibration of the AUX Channel csssssssssssssseseee nennen enne nnne 33 Isolating current draw measurements at a specific point in a circuit in the device under test 33 Measuring battery drain while device under test is exercised s ssssssrrssrrurrrrsrrrnernrnerrnsers 34 Connecting the Aux Channel to a Benchtop Power Supply sssssesssn e 34 Data Importing Features of the Power Monitor ccceceeeeee eee eee nmm 36 Data Exporting Features of the Power Monitor ccccceeeeee eee eee mme 36 PIS export details ii cvaciie E 37 CSV export detalls e EUER 37 FUNCTIONAL DESCRIPTION OF THE POWER MONITOR cceeeeee eee eee enhn nnn nnn 38 APPENDIX carrannan anaana AE A AAA 40 FREQUENTLY ASKED QUESTIONS iiiiiiiiesk seek a ANNEO RAT ERR A ERE KEE i a na aaia 40 Do you provide Linux or Mac support ssssssssssesseeenen nnne nennen nennen nnn 40 Do you provide higher or lower voltage support
57. tting the USB passthrough mode to Off disables the USB connection The main channel connection with Vout enabled is required in this setting The USB passthrough mode is set by selecting Parameters and then specifying the desired mode VOLTAGE SOURCE DISPLAYED CHANNELS 9 Main V Man v usa Aa DISPLAYED MEASUREMENTS LI Power amp vg CurrentAvg v Voltage Avg _ Power Min _ Current Min Voltage Min Dower Mar L Power Ma i Current Max Voksge Ma Restore Defauts mu Display Markers Figure 29 USB pass through control Depending on your device and use case there are different configurations you will want to use Measuring Power Battery powered device with a battery blank or bypassed battery mobile phone etc USB A cable connected from front of power monitor to device USB B cable connected from front of power monitor to computer USBPassthrough AUTO Main channel is connected and powered Vout enabled USB channel selected for display In this configuration the state is equivalent to having USBPassthrough ON before you start sampling You can communicate with your device under test send data etc As soon as you start sampling it is equivalent to USBPassthrough OFF All current being provided to the device is from the power monitor main channel and no USB current is provided Once sampling is completed the state is equivalent to USBPassthrough ON and the dev
58. u switch which Power Monitor you are connected to you will be asked if you want to save your current data Similarly a given Power Monitor may only be accessed by one PowerTool instance at a time If you are running multiple instances of the PowerTool software and another instance has already connected to a given Power Monitor it will not be available in your list of serial numbers to select If you are running with Enable Device Scanning OFF the serial number will be greyed out and you will not be able to change which Power Monitor you are attached to A reset button is available to cycle the power to the Power Monitor unit itself The reset operation is equivalent to cycling the power button in the front of your Power Monitor This can be used if your computer loses its connection to the Power Monitor device or if you want to cycle the hardware for any reason Be aware the Power Tool GUI will lose its connection to the Power Monitor device and will be prompted by the Power Tool UI to re establish the connection Figure 21 Reset button Cursors enable users to measure the delta Time and selected data channel between two points on the power monitor output data plot 1 Drag the red and blue arrows indicator to the desired position on the power monitor output data plot as shown in Figure 22 below 2 The Delta will be displayed under the Selection Statistics section Mwniurd Powar Dala PENNE penrem T d 420 V rae i i
59. w close we are within desired calibration tolerance Temperature variation is the primary reason why the Power Monitor will go out of tolerance though large rapid changes in current consumed will always cause this A Green heart indicates the unit is in calibration and measurements will be within the advertised accuracy of the Power Monitor A yellow indicator indicates marginal calibration and measurements will tend to be accurate to within 5 rather than 1 A red indicator means measurements will be within 10 and may be off even further if the indicator remains red for more than about 30 seconds Figure 19 below shows the calibration indicator Q9 Calibration OK Figure 19 Calibration indicator The serial number displayed in the UI and shown in Figure 20 below is the serial number of the Power Monitor hardware It is programmed to a unique number in the factory If the firmware is upgraded improperly in the field the factory serial number may be incorrect If this happens it is advisable to contact Monsoon Solutions Inc because the factory calibration settings may have also been lost S 4545 Figure 20 Serial Number 20 If more than one Power Monitor is connected to your computer a dropdown arrow will be displayed next to the serial number to let you switch which Power Monitor you are currently connected to for sampling The Power Tool GUI establishes a connection to only on Power Monitor at a time so if yo
60. will need to be updated on the Power Monitor Please follow the instructions on updating the Power Monitor firmware The following table describes the various revision numbers that are displayed in the UI Field HW rev FW ver Prot ver SW ver HW rev B C D B C D B C D B C D D SW ver 3 0 4 4 0 2 4 0 1 4 0 3 4 0 4 4 0 5 Description Power Monitor hardware revision Power Monitor firmware version Version of protocol specification PowerTool UI version Firmware Version 12 17 18 19 19 20 20 To make sure the correct software is installed check the revision fields in the UI Figure 10 below shows the area of the UI that displays the software revision 12 GRAPHICS Copy Graph Cony Stats Copy Screen D Figure 10 Revision fields shown in the PowerTool UI 13 To power up the device first set the Vout voltage The voltage can be set from 2 01 V to 4 55 V in 01 V increments The maximum voltage of a lithium battery is usually 4 2 V so the software will default to a maximum of 4 2V and a warning window will pop up the first time a voltage above this value is selected To enable the power click the Vout Enable button to disable the power click the Vout Disable button Figure 11 below shows the location of the Vout Enable which toggles when it is clicked to the Vout Disable button Vout ENABLED oa Inst Current Fe MA mW Figure 11 Vout Enable and Vout Disable button T

Mobile Device Power Monitor Manual

Contents

Download Pdf Manuals

Related Search

Related Contents