CellMeter-8_Man
Contents
1. CellMeter will beep respectively and display the num ber of cells in the LiPo pack For example if the LiPo is a 3 cell pack the symbols will indicate the number of cell and you will hear a blip 3 times Please verify by the number indicated on the LCD screen to the number of actual cells of the battery pack When the CellMeter displays an incorrect cell count you need to verify whether the first connector of the balance connector is connected to the first position in the Cell Meter Alternatively there may be a of fault in the battery balance lead or cell malfunction 4 If when you initiate the Cellmeter you are not presented with the main page as in the figure below You can return to this page by cycling through the screens by using the menu button Example 3 Cell LiPo Serial Pack Voltage Remaining volts gauge 116 EMNMMM F lt EERERGGEE Remaining amount fuel gauge The remaining amount gauge gives you a graphical bar graph display of the status of the battery by graph and the balance of the cells by graph When the bat tery is fully charged the graph extends to F on the right hand side of the LCD As in the example you can see that the battery is about 50 used If your battery shows only 1 bar you must charge the battery before you use it Each Graphical bar on the Volts gauge refers to about 10 of the overall battery voltage There are times when differences occur between the remaining amount an2. balance charger Page 2 CellMeter 8 ep plane com Serial voltage Pack voltage of the whole battery total voltage of all cell is indicated The number of serial cells The total number of cells in the battery pack is indicated 3S as indicated in the picture 3 serial cells This is the same as the cell quantity About the warning function When there is an abnormality in the cell voltage of the battery pack which is connected or when the cell imbalance becomes large the balance has deteriorated the CellMeter will display a warning message as indicated and an alarm will sounds Cell low voltage warning The Cell Low Voltage Warning is indicated in the case where ff k Cel l Lol tage k the voltage of each cell is under 3 00V A LiPo battery cell requires the individual cell voltage to be ff Too Low i maintained above 3 00V When the cell is not under load nothing is connected and the voltage for the cell has fallen into an overdischarge state the warning will be displayed and the alarm will sound The alarm will continue in this state until the cell voltage rises above 3 00V It is important for longevity of your LiPo batteries to maintain a cell voltage over 3 00V even when the bat tery is in a model and the throttle is on full If you have the CellMeter connected to the LiPo battery and do this test on the ground in a controlled environment you will see what the battery is doing under load If the
3. cell voltage falls below 3 00V in this test then this indicates the battery is in an over discharge state The discharge current which drawn from the cells is too high for this battery In this case the airplane you need to look at the power setup of the model e g propeller load could be lowered would be a good start ing point Overvoltage warning m The Overcharge Voltage Warning is indicated in the case Cell Woltadge where voltage of each cell is too high n Lie al i Most LiPo battery pack products in the market have an upper E Too H 1 gh x limit voltage for each cell of 4 20V Most overvoltage occurs during the charging cycle Even then we should try not to exceed 4 25V when a cell exceeds 4 30V col lapse of the cell function starts when a cell reaches this point ignition combustion fire can occur The CellMeter 8 is factory set to trigger the Overvoltage Warning when the cell voltage exceeds 4 24V Some LiPo batteries on the market may be able to exceed 4 30V Always enquire with the manufacturer or at the place of purchase to ensure that the specifications of the LiPo battery pack If this is the case for your LiPo battery then you may wish to increase the warning voltage to 4 35V Page 3 CellMeter 8 ep plane com Cell voltage balance warning The Cell Voltage Balance Warning is indicated in the case where the cell voltage balance has deteriorated If you test the LiPo after a use but before the pack ha
4. closest to the are shown and after the cell count will be an H indicates the first 4 cell voltages The indication bars on the display will indicate 4 electric battery bars facing toward 0 direction When the button is held it changes to the indication of the group of the other side 8s cell voltage 4 digit page indicatory example of 8 cell oS 3 L d L n L n Fast packs When connecting 7 cell and 8 cell packs the Cell or 1 ora ardd Meter 8 divides all of the cells into 2 groups of 4 The cells that are at the highest side of the pack closest to the are shown and after the cell count will be an L indicates the last 3 or 4 cell voltages The indication bars on the display will indicate 4 electric battery bars facing toward 0 direction When the button is held it changes to the indication of the group of the other side Page 7 CellMeter 8 ep plane com About the variation of cell voltage Most of the time you will notice a slight difference between the voltage of the cells in the pack within 10mV 0 01V This becomes more apparent when the pack is under load and has a current running through the cells This is due to the variance in capacitance of each cell The reality is there is no pack that maintains even cell voltage across all cells under all conditions load or no load from 0 100 charge We recommend that the use of a cell balancer be used when charging to enable the cell voltages to be adjusted to an even leve
5. following case we would like to compare with a hp declared value and convert with the watt value x0 00134 or the kilowatt value x1 34 1W 0 136PS 0 134hp 1kW 1 36PS 1 34hp 1PS 735 5 W 0 7355 kW 1h p 745 7 W 0 7457 k W 3 About electric power consumption Power is the calculation of Voltage x Current P Vxl If there is no voltage present then there are no cur rent amps running through the circuit motor For a Current to run through a circuit there needs to be a complete circuit so current can run even if there is no motor present Page 10 CellMeter 8 ep plane com About efficiency Efficiency is a ratio of power that is put into the motor versus the amount of power the motor converts into turning the prop In an ideal world the motor would achieve 100 efficiency We know what this is not the case In general a smaller say 50g motor will only reproduce about 60 efficiency but a larger motor say 300g can return an efficiency up to 90 The rest of this energy is turned in heat When the data sheet for the motor is available we can do a comparison it is possible to know the theoretical efficiency values from there At full throttle it turns actually power units at the ground rpm voltage measures electric current simultaneously by the fact that it inputs into ThrustCalc are known It now becomes possible to verify whether or not the two values compare The efficiency value which ThrustCalc indicates an
6. packs 4z 1 47541 1 af The number of serial cells serial voltage the remaining 3569 569 569 569 amount is indicated in upper row from the left It shows the same result as the main page Individual voltage of each cell is indicated in the lower position in 3 digits The numerical value where the sign on the left edge is indicates the first cell AS cell 4 digit page indicatory example of a 4 cell packs The 4z 1 47541 3687 information that needs to be displayed for this setup cannot S69 S5690 3689 all be displayed on 1 line so the first cell voltage is indicated in place of the remaining voltage in the upper right side of the display In the case of the 2 3 cell pack all cell voltage are indicated on the lower line and the voltage remains 8s cell voltage 3 digit indicatory example of an 8 cell packs r B Tas Sra Sr As with a 5s pack of cells or more the cell number becomes Sr 1 ore Te of more than a row can handle it reaches the point where both of the rows are required to be used to indicate all of the cells voltages It is recommended to verify this information against the pack as shown in the detailed numerical page 8s cell voltage 4 digit page indicatory example of 8 cell oS i H d 3694 J62 packs When connecting 7 cell or an 8 cell packs the Cell Sr He ari ju ju ju ji Meter 8 divides all of the cells into 2 groups of 4 The cells that are at the highest side of the pack
7. the Thrust Calc is faster This may be a better way for you to enter numerical values quicker in the CellMeter 8 Modification of warning voltage Safe Cel l Uo l t a An Overvoltage warning occurs when the battery voltage UFFerLrmt C4240 exceeds the pre set voltage level set here in this screen Cell voltage such as a LiPo balance problems if you have a special battery pack which has a limit that does not exceed 4 300V is used This is the screen that will enable you to modify this setting In a stan dard battery pack where the cells use with 4 240V the standard default value Adjustment of remaining amount meter Remaining Meter The remaining amount value meter can be adjusted The ei ust AH 1 Sut CellMeter 8 calculates the remaining amount from the SSS a value which is added to this value to and the actual cell voltage When the CellMeter 8 is at the factory default setting it is O 000V Modifying this setting will adjust the remaining amount indication Cell voltage calibration The CellMeter 8 is shipped pre calibrated and there is really ADC Cal ibrat i OF no need for the user to adjust these settings If you find that fst Ci 0062 over time the values deteriorate and the errors get bigger This is the area that you can make the corrections in It is suggested that the CellMeter 8 is checked against a known tes
8. the warning function becomes effective again 3 LiPo battery check CellMeter 8 reference When you purchase a brand new battery Immediately after opening it test the batteries performance using the CellMeter 8 When an abnormal voltage warning occurs low voltage there is a possibility that the battery is an inferior quality battery Click the button now showing the cell voltage page and take note of the cell voltages and balance state Before charging Before connecting the battery to the charger check it with the CellMeter 8 if it verifies that an abnormal low voltage warning or an overvoltage warning this is possibly due to the natural dis charge of time whilst the battery is sitting on the shelf If this occurs either charge or balance the battery with a reputable balancer chardger and check again before use While charging only in the case of series charging When series charging is performed from the main connectors of the battery pack the balance terminal is free to connect to the CellMeter 8 This will allow you to watch the behaviour of the battery whilst charging It is important whilst charging especially in the latter half of the charge cycle when the cell voltage becomes high you will need to verify that the overvolt age warning and cell voltage balance warning do not occur Please verify the battery after charging and before use After completing the charge When the batteries voltage reaches 95 100 it is charged ful
9. CellMeter 8 ep plane com Thank you for purchasing the CellMeter 8 The CellMeter 8 allows you to check the individual cell voltages of a 2cell 8cell LiPo lithium polymer battery The CellMeter 8 individually measures amp diagnoses the cell voltages of the multiple cells the result is displayed on the large liquid crystal screen The CellMeter 8 replaces all of the tedious measurement and calculations required in the past to determine the overall voltage of the LiPo pack and the individual cell voltages that determine the balance of the LiPo pack The CellMeter 8 now makes it possible to determine and verify the detailed state of the LiPo battery A balanced battery provides a safer environment when flying If you know that your cell balance is out you can address the issue The prevention of deteriorating cells over time will improve the efficiency and stability of the LiPo battery 1 CellMeter 8 Applications la CellMeter 8 116 ENHEEH F Ss xEERRRNEEN lt Od JO DEUUOD eouejeg 8 7 6 5 4 3 2 1 LiPo Balance Connector 2 8Cell LiPo LCD Liquid Chrystal Display the battery information is displayed on the LCD screen Menu Button changes the display between different display readouts The button also allows for numeric input in the thrust calculator PC Serial connector allows for the connection of a serial cable to a computer Not yet imple mented Check website for software updates http www ep plane
10. calculation also Reference You can measure the serial voltage whilst moving the throttle up to full with the CellMeter 8 connected to the balance port of the LiPo battery For electric current you can use a DC clamp meter be tween the battery and the speed controller Used in conjunction with a WattMeter or other type of meas urement tool You will be able to measure voltage and electric current simultaneously If you utilise Hype rion s E Meter for rom voltage and electric current you will be able to store the values in the e Meter memory Page 14 CellMeter 8 14s8l 268A Pis2lolW Eri Over 1328 EBA Pis fall EP Over 13681 ZAHA Fi r zWd Ef Over 136681 HH Piter2ll Ef Over 13661 4H Pirs44h Ef 83x 136681 450A Fis6leWl Efi rte 13681 4530 Pir i6hl Ef 73 ep plane com When in Numerical editing mode you can press the button quickly and you will increase the number count by 1 Increment mode each input increases from 0 9 accept for the Voltage and Amps they have incre mental value of the 0 49 Set the tens unit rank value to 1 Continue as you did before and set the unit rank value to 3 Continue as you did before and set the 1 rank value to 6 Continue as you did before and set the 01 rank value to 0 Now by continuing to utilise the cursor menu move the cursor over the tens unit value rank and change the value to 4 Continue as you did before and set the unit rank valu
11. com cm 80 2 Basic Use Method When you connect the balance lead to the Cellmeter 8 you must ensure that both the Ground pin s for the balance connector and the Cellmeter 8 go together Different Balance leads have different wiring configura tions and some are coloured like the samples BELOW The Cellmeter 8 has 2 54mm pin intervals If the connector on you battery does not fit do not force the con nector obtain a suitable adaptor lead from your hobby shop The LiPo battery balance connector is connected to the LiPo Balance Connector on the CellMeter 8 200 11 a2ue je AE ll Dodo parue Q Page 1 CellMeter 8 ep plane com 1 The balance connector of the battery pack is connected to the LiPo connector of CellMeter 8 The ground pin the C2 eP Plane com lowest voltage reference point on the balance connector Cel lMeter s LJ 4 OV connects to the ground pin marked on the CellMeter 2 You should hear a short sound stepped beep the CellMeter 8 starts the title picture as in the top right figure is indicated instantly If the CellMeter 8 does not start check the connection of the battery and the polarity of the balance connector is around the right way The Total voltage in the battery pack of an over discharged battery cannot stat a Mauuuu CellMeter 8 if the voltage has fallen below 5V l iz T 3 3 After the initial boot up screen as described above the
12. d the actual remaining amount These difference can be associated with the quality and use of the battery and its cells A battery that has always been charged with a reputable balancer is likely to reproduce accurate readings on the CellMeter A battery that has had a hard life full discharge and recharge with no balance charging is more likely to have discrep ancies between actual and shown results The number of serial Cells Cell balance gauge Remaining Gauge page example Cell balance gauge The Cell balance gauge measures the difference between all cells that are connected to the CellMeter The difference is shown graphically between the cell that is showing the highest cell voltage to the cell that is showing the lowest cell voltage largest cell voltage difference indicated on the graph When the cell volt ages read equal the bar extends all the way to the right O This indicates that the cells are all balanced to a satisfactory level When the cells have a difference in voltage the bar shortens and indicates towards the left X The gauge indices are equivalent to 10mV bar In order to maintain long lasting battery life if the balance gauge does not show a satisfactory cell balance then a cell balancer should be applied to the pack before use A good cell balancer can be purchased from your local hobby store If the cell balance indica tion is low after the battery has been used this can be normal and charging should occur with a
13. d the general efficiency value of the motor weight which the graph below shows Because some loss occurs even in the electric wire the controller and the like the electric if from theoretical efficiency value and the general efficiency value in the below graph from the data sheet of the motor the difference is about 15 When the efficiency indicated by the ThrustCalc 8 is low in comparison with the motor data sheet perhaps there are some electric or mechanical issues somewhere in the power units path chain or incorrect pro peller size battery voltage In this case do not fly with this set up inspect the various parts once more and look for any abnormalities Electric power consumption W brake horsepower W loss WY with these known factors you can calculate the loss but remember a large portion of the energy has be turned into heat steadily in the end can burn out a motor or speed controller 100 Motor Efficiency Og 50g 100g 150g 200g 2502 300g 3502 400g 450g 500g Motor Weight Thrust Calc Numerical input method ThrustCalc is divided into 2 pages the thrust brake horsepower page and the electrical efficiency page Both allow numerical input in the upper section of the display showing the calculation result in the lower row of the display Here the rom 9 253rpm propeller length 12 0 inch propeller pitch 6 0 inch voltage 13 60V electric current 45 3A as an exampl
14. e Try different values so you are familiar with its function and how it works for the next time you are at the field Page 11 CellMeter 8 SHMArPe 1605x Be Thi 398693 Porl re Cursor SHHErPm 105s 6H Th 928609 Porl rel Blinking SHHErPm 105x 6H Th i2k3 Pore4shl Numerical editing menu 4 OK Quit ep plane com Immediately after starting ThrustCalc the cursor will appear as an under line under the numerical value of thousands under the 8 in 8000 in this example If the button is pressed for a short interval the cursor will move to the next numerical value of hundreds and so on The values that are set in each location are re membered in the CellMeter8 memory even when the battery is removed In order to become proficient with using the ThrustCalc try practising using the cursor When the button is held ThrustCalc goes into numeri cal editing mode the position of the cursor begins blinking The values that are set in each location are remembered in the CellMeter8 memory even when the battery is removed In order to become proficient with using the ThrustCalc try practising using the cursor to input some values When in Numerical editing mode you can press the button quickly and you will increase the number count by 1 Increment mode each input increases from 0 9 accept for the Prop Voltage and Amps they have in cremental value of the 0 49 Because we would like to designate t
15. e known figures into ThrusCalc By the fact that you can verify thrust it becomes possible to estimate the general power of the aeroplane in advance This will give you more knowledge about your plane and the power characteristics to make your first flight less challenging and safer after all you may have other flight char acteristics to deal with This should help you to estimate flight take off distances recovery from a stall For more experienced pilots this will enable them to calculate if the plane is going to be able to hover It can show you what changes to the power calculation will be affected by a different size prop About brake horsepower Brake horsepower is the power which is necessary to turn a propeller at a given rpm propeller has a known size amp pitch This is indicated in ThrustCalc as a watt value or kilowatt value but it is the highest output and horsepower The motors power kW compared with horse power hp is about double If the power of a motor in kW is compared with the horsepower of the motor the results are significantly differ ent If the watt value of a Motor compared to horse power lets say 1watt The numerical value which is dis played as power of the motor is 0 00136 times This has a kilowatt value of 1 Because 36 can convert to a horsepower value by the fact that it doubles its Known watt value at a PS unit output PS can be com pared to the engine and the highest output which is indicated In the
16. e to 5 Continue as you did before and set the 1 rank value to 3 Page 15 CellMeter 8 ep plane com You have now completed the Input of all values into ThrustCalc Pi in the lower position InputPower The numerical value is electric power consumption When it is be low 999W it is indicated as a watt value when it is above 1 000W prefix meaning k is attached this be comes a kilowatt inscription Ef Efficiency The numerical value is efficiency In regard to the calculation when efficiency becomes 100 or more Over is indicated Because efficiency over 100 or more is not possible when Over is displayed there is an input error for one or more of the numerical values If the data has been input correctly as indicated in the previous pages the following values should be achieved Electric power consumption 616W Efficiency 73 Note As for thrust and the brake horsepower which ThrustCalc indicates because the value is an esti mated calculation the actual thrust may differ from brake horsepower this may happen because the pitch is too large or the prop is too long With a simulation if the rpm is too low this has not been taken into consideration In order to obtain the appropriate thrust it is necessary to use a prop that is inside the appropriate manufactures range where the propeller designer has specified pitch anti diamond ratio and rpm In addition actual thrust changes can occur with different atmospheric pres
17. housand rank of rpm as 9 if the numerical value which is originally indicated is under 8 it re quires several increases by clicking buttons to get to 9 To edit the numerical value which is originally larger than 9 or by clicking too much You can open the nu merical editing menu select with the button and execute by holding down the button Now whenever the button is clicked from the main screen it is possi ble to decrease the numerical value by 1 value at time Decrement mode You have entered the first numerical value and you are happy with the valuie and you wish to move to the hundreds value position Press and hold the Button for a couple of seconds you will enter into the numerical editing menu again Select the and press and hold the button again When you return to the ThrustCalc main screen you will have moved over 1 unit to the Hundreds value Use this method to navigate through the values to iunput the correct numerical values Page 12 CellMeter 8 92HRrFM Th 15kg 15x 68 Pot 2594 9275 8rFM Th 15kg 165x 66 Fo zZ63h IDSF Th 15kg 1 5x 66 Fo Yeoh 925 3rF 6 Thi 2eko 25x 6H Por 336 9275 3FF MH Tht 2k g 120x 66 Pot 4356 9275 SFM Tht 2k g 17Bx 66 Pot 456l 9275 3FF M Tht 2k g 120x 68 Fo 456l ep plane com Now the blinking cursor has moved to the numerical value of hundred rank of rpm increase up to 9 with click of the button this val
18. indicates the individual volt age of all serial cells On the cell voltage page each serial cell voltage is displayed at 10mV units in a 3 digit display using 2 decimal places Press the button again and you get to the next page where each serial cell voltage is displayed at 1mV units in a 4 digit display using 3 decimal places When we verify the cells individual voltage of the LiPo bat tery usually it is sufficient in 3 digit indicatory page of the 10mV unit E g For the purpose of detailed investigation of the individual cell voltages and the behaviour of the LiPo battery perhaps 4 digit indicatory page is useful Page 5 CellMeter 8 ep plane com Whenever the button is clicked from the main page gt the detailed numerical page gt the cell voltage 3 digit indicatory page gt the cell voltage 4 digit indicatory page gt the main page It keeps cycling through the pages which ever page in lastly used is the page that is displayed next time the CellMeter 8 is turn on If you are testing a battery with 7 or more cells 7S 8S When connecting a battery pack of 7S cells or more will display on the 4 digit indicatory page only cell voltage is indicated but divided into 2 groups When these are displayed by group this is changed by hold ing the button down Page 6 CellMeter 8 ep plane com Indicatory example of cell voltage page AS cell 3 digit page indicatory example of a 4 cell
19. l when the pack is fully charged When charging a multi cell LiPo battery it is important to always use a balancer and charger or a charger with an in built balancer There are now many good chargers on the market with built in balancers Charge times may be longer using a balancer or a charger with an inbuilt balancer than charging the LiPo with a serial charger only A balancer or a charger with inbuilt balancer will continually charge and discharge cells at the end of the main charge cycle to en sure that all cells are equally balanced If you charge a LiPo only via the serial connector there is a greater risk of charging the cells to different voltages and causing damage to the cells in the LiPo A damaged or unbalanced LiPo is more likely to cause overheating fire and or damage in or to a model If you were to connect the CellMeter 8 as per the diagram below using the CellMeter 8 on the Cell Volt age Page you will notice how the individual cells behave under a true load A good battery will show an even discharge across all cells under a heavy current load Discharge CellMeter 3s 12574 166 419 419 419 LiPo Battery Pack Controller _ a ESC eee 40A LiPo 11 1V 2000mAh ve Recejver Receiver The image above shows the CellMeter 8 measuring the battery under load The load is provided by the speed controller motor with a propeller and securely fixed to a test station or in a plane The test ha
20. ly Until it reaches the overvoltage territory it isn t overcharged Has the cell voltage balance been even And so on you will need to verify Several minutes after completing the charge there are times when the cell voltage will go down gradually depending upon the battery after about 10minutes has elapsed from the completion of charge Again check using the CellMeter 8 as the reading will be more accurate Page 4 CellMeter 8 ep plane com Before the flight Each time before you fly by habit you should do a battery check verification with the Cell Meter 8 This is a good habit to get into as a simple check can save the cost and embarrassment of a crashed model from the use of a discharged or damaged battery In addition using a battery that you know is fully charged that has decreased naturally between the charge and flight There is a possibility that the battery will have deteriorated over time or because it is an older battery After the flight When abnormal voltage warnings occur low voltage warning over discharge voltage warning the current setup is drawing too much power Post flight you should have a remaining voltage of about 10 You should use the remaining battery amount to calculate your next flight times Before storing the Battery If you plan on storing a battery for any reasonable length of time you should consider the battery charge levels It is recommended for the Battery to be kept with a 10 20 charge only in the cell
21. nge the number to 6 Hold the button down for a couple of seconds to reach the Numerical Edit Menu and again straight away for a couple of sec onds and you will move to the next value Now adjust the numerical value of 0 1 rank of the pro peller pitch Adjustment will be from 0 9 Adjust this value to 0 Page 13 CellMeter 8 ep plane com Now you should have the three values as entered into the ThrustCalc on the previous page The rpm the Propellers length and the Propellers pitch These values will be represented on the top row of the LCD display On the lower Row of the LCD display you will see the values calculated Th 2 0kg Po 450W This is what you expect to get as a real value result from a live setup Th Thrust numerical value is shown in grams and kilograms When the value is below 999g it is indi cated as a gram value When the value is higher than 999g it is shown as k kilograms and the symbol k is used Po out put power numerical value is shown in Watts and kiloWatts When the value is below 999W it is indicated as a Watt value When the value is higher than 999W it is shown as k kilowatt and the symbol k is used If you are only after the thrust and brake horsepower then you are done You can compare the thrust and weight of the aeroplane if indicated to the calculated values in ThrustCalc If you have the rom measurement and voltage and electric current then it is possible to do the efficiency
22. or safety this setting is not recorded to the CellMeter itself After removing the battery pack connection for the second time the CellMeter restarts Lower row ThrustCalc To activate the Thrust Calc select and hold the button when the Run is selected If the menu is left up and no button is pressed for 10 seconds a warning beep plays for the last three sec onds and the words cancelled appear on the screen briefly the CellMeter 8 resets to the CellMeter main pages 7 Thrust portable calculator With the main menu ThrustCalc Run is selected byh holding the button down ThrustCalc starts Thrust Calc is able to Calculate the following Sa0GrPm 185 66 1600 THIS209 Pot i7al Pi 20Gb CORRE LASx 6B 1AB 2088 Thi9809 Pot 176 Pi Z W Ef 85 ThrustGale Thrustalc What can be done with ThrustCalc a propeller revolution rom Revolutions Per Minute b Propeller length c Propeller pitch Thrust from motor Brake horsepower Power d voltage e Calculated current draw Electric power consumption Efficiency of the power setup is indicated Page 9 CellMeter 8 ep plane com About thrust The CellMeter can estimate the thrust of an aeroplane there are many variances and some known fac tors Lets assume we have an aeroplane and this is its first flight We know the size of the prop and we can do a static full throttle rom check with a tachometer on the ground We can now add thes
23. revious section The numerical value will decrease 1 incre ment at a time with each click decrement The numerical value will increase 1 incre ment at a time with each click increment This will reset the value of the cursor high lighted number to zero Ends numerical editing mode Again to enter into numerical editing mode the button needs to be held ThrustCalc mode ends and returns to the battery information page Page 17 CellMeter 8 ep plane com 8 Configuration Mode When the battery is connected to the CellMeter 8 while the button is held down On the release of the button the CellMeter 8 stats Configuration mode setting modification mode You can by clicking the but ton scroll through the individual settings and to verify each setting in order When the setting that you wish to change is indicated on the display press and hold the button to activate the cursors brackets around the value that will be changed Press the button to advance the value by a ve increment of 1 Hold down the button again and the options page will be displayed The value can be changed by incre ments of 1 values a factory default option is available and an OK option to enter your selected option Click amp Hold Adjustment of hold time of button Threshold Cl Hs This menu allows you to adjust the click time for the button to advance The default hold time is 1sec If you wish to make the click time 0 5sec input for
24. s Unbalanced E cooled down and settled your reading may be affected as ims the balance deteriorates naturally through a cycled run The CellMeter 8 considering the batteries remain ing voltage amount generates this warning When this warning occurs allow the battery to cool and then charge with a balancer and test again If the Warning occurs when a battery pack is fully charged a balan cer should be applied to the pack to re establish unity across all cells and an even balance An unbalanced battery pack can be dangerous When the battery check ends please remove the balance connector from the LiPo connector of the Cell Meter 8 If the CellMeter and the battey pack are left connected for a long period of time the there is a pos sibility that over discharging may occur The consumed electric current of the CellMeter 8 is approximately 3mA but if the pack where for example 1000mAh and was charged fully it would become overdischarge in about 2 weeks Cell Voltage NB It is possible to make these warning functions invalid The menu screen shown is activated by holding down the button for 5 seconds The screen below appears Clicking the button here after selecting No disable the warning function Holding down the button returns to the main menu Hlerti les Ho Thrystlalc Run With this one time warning function disabled disconnecting and re connecting the battery resets the CellMeter to the factory default and
25. s No more than 50 This will prevent the battery for over discharging A new battery off the shelf from a reputable manufacturer will come with a 50 charge in the battery If the Battery os less than 10 charged after a flight then add a small charge before storing If the battery is fully charged then you can dis charge through some battery charger discharger systems to get the charged state just under 50 4 Detailed numerical page When the button is pressed once from the main page remaining amount fuel gauge it changes to the de tailed numerical page which can verify the information of the whole battery in summary with detailed values The top line shows the serial voltage of the battery at 1mV units the indication on the right side of the screen can verify to 1 units On the lower line it shows the cell with the highest voltage on the left and the cell with the lowest voltage to the right The voltage difference between the highest cell and the lowest cell is then displayed on the far right bottom of the display and is accurate to 1mV units The number of serial cells Serial voltage Remaining amount HS 335174 agh 4193 410 h412 The highest cell voltage Lowest cell voltage Cell Voltage differential Detailed numerical page example 5 Cell voltage page 3 digit 2 decimal point indication and 4 digit 3 decimal point indication If you press the button again it changes to the CellMeter 8 voltage page which
26. s been conducted in a controlled environment Do not attempt to replicate this test without taking due care to secure and make the test environment safe Page 8 CellMeter 8 ep plane com 6 Main menu When you first connect the battery under 7s cells to the Cell Meter 8 one of the following pages will be displayed main page Hlert CYesJ Ho the detailed numerical page the cell voltage 3 digit page or the Thrusts Ics RUF cell voltage 4 digit page To access the Thrust calculator Hold the button until the image as in the example to the right is displayed To move the over the next func tion press the button To quickly make a change to the displayed function hold the button down Upper row Alert This is a one off setting that turns the Alarm off if you are doing diagnostics on a battery that is triggering the alarm The Cellmeter 8 will revert back to Alert on when the battery is removed You have the choice to turn the Alarm on or off Yes or No to have the Alarm continue while the abnor mal voltage is present The alarm will display a warning message at the time of the cell imbalance When Yes is selected the warning message is made with the alarm Only use the No state when you are un dergoing diagnostics on a known issue when No is selected the warning display and the alarm will cease In a state where a cell is over discharged or overcharge the cell is dangerous because the warn ings have been stopped F
27. sures As for the simula tion of ThrustCalc the APC propeller is optimized as a standard For propellers of other brand names there are also some where pitch standards differs when errors becomes apparent You may need to actually measure the propeller as some hub s differ and the measurements change from manufacturer to manufacturer 1 inches approximately 2 54cm As for the simulation it is not per fect you should be able to obtain a reasonable assessment of the setup that you are wanting to use Page 16 CellMeter 8 ep plane com ThrustCalc When the button is held down the numerical value blinkes the numerical editing menu opens If the cursor menu is left active on the display screen it will timeout after 10 seconds If a state where no one operates the button for 10 second or more the menu is closed automatically and it returns to the Original input mode menu The buzzer sounds in every 1 seconds for 3 seconds alerting you that the menu is about to close You have 3 seconds to react to stop tyhe menu from closing Cursor is moved to the next numerical value to the right If the cursor is already on the last numeri cal value in the section it will move to the next numerical value in the next section Cursor is moved to the next input item Cursor is moved to the next numerical value to the left If the cursor is already on the last numeri cal value in the section it will move to the previous numerical value in the p
28. t device like a quality multimeter DC voltmeter There is the capability to change the offset in each AD converter channel parameter in order to correct offset error and gain error these can be modified If you feel that the Cell Meter 8 needs re calibration then this can be done upto 1 year after purchase with no charge accept for shipping from ep plane com To confirm pricing for recalibration e mail ADC Calibration Gain C4 G5 1 Page 18 CellMeter 8 ep plane com About Configuration menu When the numerical value it is surrounded the menu item you wish to use COK Cancel Default Note Please check that the battery has enough battery level to execute the configuration mode before entering into this mode E E Correction of numerical value is confirmed Press and hold the button to execute E ry E l Correction of numerical value is cancelled resets to original numerical value Press and hold the button to execute pam we l t Correction of numerical value is cancelled resets to standard value factory default Press When the is selected hold down the button to re enter the numerical page You will now be able to change your numerical value in decreasing values of 1 When in decrement mode the condition of is indicated in the menu enter the numerical page You will now be able to change your numerical value in increasing values of 1 When in increment mode
29. the condition of is indi When the is selected hold down the button to re cated in the menu For up to date information on the CellMeter 8 please visit ep plane com or email cm ep plane com Page 19
30. ue rotates from 0 1 Adjust this value to 2 Hold the button down for a couple of seconds to reach the Numerical Edit Menu and again straight away for a couple of seconds and you will move to the next value Now adjust the numerical value of the ten rank of rom to 5 as described above Hold the button down for a couple of seconds to reach the Numerical Edit Menu and again straight away for a couple of seconds and you will move to the next value Now adjust the numerical value of the unit rank of rom to 3 Hold the button down for a couple of seconds to reach the Numerical Edit Menu and again straight away for a couple of seconds and you will move to the next value Now you will see the blinking cursor has moved the numerical unit value to the ten value This is because the option in this section will allow you to change the whole number between 0 49 Change the number to 12 Hold the button down for a couple of seconds to reach the Numerical Edit Menu and again straight away for a couple of seconds and you will move to the next value Now adjust the numerical value of 0 1 rank of the pro peller length Adjustment will be from 0 9 Adjust this value to 0 Hold the button down for a couple of sec onds to reach the Numerical Edit Menu and again straight away for a couple of seconds and you will move to the next value Now you will see the blinking cursor has moved the numerical unit value to pitch value Adjustment will be from 0 9 Cha
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