User Manual - Affordable Scales & Balances
Contents
1. a Press e key until display show display will be show BMI Press k lt 4 key to confirm display will be show last calibrated DOODIb value a a If et use s and e keys to change new test weight value BMI then press h 4 key confirm Display will be show Place the test weight on the chair BMI After stable press h 4 key confirm Display will be show PASS Then will start self test and will come to normal display LoAd 15 CS 250 Series Chair Scales Service Manual 9 BATTERY OPERATION The Medical Scales can be operated from the battery if desired The battery life is approximately 40 hours When the battery needs charging a symbol on the weight display will turn on The battery should be charged when the symbol is on The scale will still operate for about several minutes after which it will automatically switch off to protect the battery To charge the battery simply plug into the mains power The scale does not need to be turned on The battery should be charged for 12 hours for full capacity Just under the quantity display is an LED to indicate the status of battery charging When the scale is plugged into the mains power the internal battery will be charged If the LED is green the battery has a full charge If the LED is green the battery has a full charge If it is blue indicates the battery is being charged As the battery is used it may fail to hold a full charge If the battery life become2. function programs 11 4 Testing Load cell For testing load cell remove power from the system and disconnect the PCB from the Load cell Physical Test e Check the moisture or foreign material inside e Check load cell surface badly rusted or corroded 19 CS 250 Series Chair Scales Service Manual Check the strain gauge areas become compressed Check any physical damage body bent or twisted to the load cell Check load cell cable all leads are connected any cut splits or tears Check load cell for proper input and output resistances Electrical Test Use an accurate multimeter to check the ohms Load Cell Connections Signal Green Supply Red Signal White IZ Supply Black ee Shield Resistance Measuring Points Resistance Red Exc to Black Exc 409 60 Green Sig to White Sig 3500 30 Leakage Resistance e Check each of the load cell wires to the load cell cable screen e Check each of the load cell wires to the load cell body These readings should be greater than 1000mQ or OL If this reading is less than 1000 mQ then this load cell has leakage between the internal circuit and the load cell body or cable screen Zero Balance e Connect the load cell to a stable DC source of between 5 to 10V e Connect multimeter to mV and connect to the load cell signal wires e The meter should read 0 00mV approximately 1 of full load If the output reads grea
3. CS 250 Series CHAIR SCALE SERVICE MANUAL 1 060 a gBrecknell CS 250 Series Chair Scales Service Manual CONTENTS Te PRECAUTION D cza aa hd Z KRA a e 2 INTRODUCTION 20 ii EO 3 SPECIFICATION Sp a e 4 3 1 SPEGNICAUON S KK z a GA A iS 4 3 2 Load Cell Poca ani AR LE ci 5 4 INSTALLATION usina 6 DES CRIP TION ere a E an 8 0 OPERATION 0 So eh iaa ld 10 Power ON OFF oa ts ZA dnc da aah 10 AO ASA E RA 10 A OR a veka 10 4 Hold TUT CMOM hs ZOO A imei I KA 10 A AAA AE a A O U 11 A sc tEn ok bada pia at OE 11 T PARAMETE Ron as adi A E OE 12 9 CALIBRATION de e o od Moe Eb BA 2 hue 14 9 BATTERY OPERATION cta AA AU a 15 10 RS 232 OUTPUT ree da 17 11MAINTENANC E airada anar LB KEN A a i red E NEA a Soto 18 12 EMO COGS o 19 11 3 Determine the Problem owa aoc wi OE AEO rante 19 M4 Testing Load Gallos acti 19 11 5 Check PCB VONAGES AlE RA R A R iz ah 21 T16 NOUBIESSNOOUNE des dat no ta ola 21 CS 250 Series Chair Scales Service Manual 1 PRECAUTIONS AN WARNING DISCONNECT ALL POWER TO THIS UNIT BEFORE INSTALLING CLEANING OR SERVICING FAILURE TO DO SO COULD RESULT IN BODILY HARM OR DAMAGE THE UNIT AN CAUTION Permit only qualified persons to service the instrument Before connecting or disconnecting any components remove the power Failure to observe these precautions bodily harm or damage to or destruction of the equipment e The chair scale is a precision ele
4. SPECIFICATION 3 1 Specifications Model CS 250 Maximum Capacity 250kg Readability 100g Resolution 1 2 500 Tare range 249 9kg Minimum Capacity 2000g Linearity 200g Common Specifications Interface RS 232 Output Optional Stabilisation Time 2 Seconds typical Operating Temperature 0 C 40 C 32 F 104 F Power supply external 12V 500mA AC power adapter Calibration Automatic External ADC 2 A Display 25 mm high 6 digits LCD with auto backlight and loading bar graph Housing Aluminium platform ABS plastic indicator Gross weight 19kg CS 250 Series Chair Scales Service Manual 3 2 Load Cell Specifications Model No L6D Rated Capacity kg 2 5 3 5 6 8 10 15 20 30 35 40 50 Sensitivity 2 0 0 2 mv v Excitation Voltage 5 12V Material Aluminum Cable 0 3 3m 4mm Input Resistance 4090 60 10650 150 Out put Resistance 3500 30 10000 100 Temperature Range 35 C 65 C Safe overload 150 F S Ultimate overload 300 F S Error 0 0233 F S Creep 20min 0 020 F S Zero Balance 0 5 mV V Max Platform Size 250x350mm CS 250 Series Chair Scales Service Manual 4 INSTALLATION Unpacking Carefully take the balance out of its package make it sure its not damaged and all accessories are included e Remove the weighing scale from the carton e Remov
5. ctronic instrument handle it carefully Do not install the scale in direct sunlight e Verify the local voltage and receptacle type are correct for the scale e Only use original adaptor other could cause damage to the scale e Pluggable equipment must be installed near an easily accessible socket outlet e Avoid unstable power sources Do not use near large users of electricity such as welding equipment or large motors e Avoid sudden temperature changes vibration wind and water e Avoid heavy RF noise Keep the scale clean CS 250 Series Chair Scales Service Manual Vv Vv VW Y Y VW VW V Y 2 INTRODUCTION The CS 250 series chair scales that amplifies signals from a load cell converts it to digital data and displays it as a mass value It is accurate fast and versatile series of general purpose balances with weighing functions and accumulation Ergonomically optimized seat comfortable safe and reliable Grasp the handrails in two ways gross grip area vertical grip area Handrails with rubber material comfortable and safe Adjustable angle of instruments to meet the user reading 4 transportation wheels with brake Footrest foldable when folded out with low distance to the floor Each single armrest foldable Bag for power supply fixed on the chair when power supply not in use Optional RS 232 interface can connect computer and printer CS 250 Series Chair Scales Service Manual 3
6. d Check the pans are installed after self test Unstable weight load correctly Try to turning on again cell damaged 2j CS 250 Series Chair Scales Service Manual OL or Maximum capacity Check the platform is installed exceeded Load cell or correctly Try to turn on the scale mechanics damaged again Do the calibration again Power supply faulty Weight is on the Check the platform is installed or NULL platform is below correctly Try to turn on the scale displayed permissible limit Pan again not installed correctly Do the calibration again Power supply faulty Load cell or mechanism faulty Display is Goods touching Check the scale is in acceptable unstable somewhere Air location variation or any Check the connecters and load cell vibrations Check the power supply and battery Temperature changed Load cell or connections faulty Power supply faulty Weight value Calibration error Use accurate weight for to do the incorrect Platform of load cell calibration touching somewhere Wrong weighing unit Check the pan and load cell is installed proper and touching Check the parameter settings Check the load cell and connecters Can not use full capacity Over load protection stoppers or transport locks are not removed Parameters are set incorrectly AD problem Load cell or mechanism damaged Check the stoppers and locks under the platform Chec
7. e the protective covering Store the packaging and to use if you need to transport the scale later e Inspect the scale and terminal for damage e Make sure all components are included Accessories 1 Balance 2 Adaptor 3 Product manual Level Adjusting Place the scale on a table Check the water mark If bubble is not centre adjust the leveling feet until reach centre Check the level when you change the location Not Level Level Charging Battery e To charge the battery insert the adaptor pin to jack jack is locating rear side of the scale Adaptor simply plug into the mains power The scale no needs to be turned on e The battery should be charged for 12 hours for full capacity In the display there is an indicator show the status of battery charging When the scale is plugged into the mains power the internal battery will be recharged If the indicator off the battery has a full charge If it is on the battery is nearly discharged and if yellow the battery is being charged e Do not use any other type of power adaptor than the one supplied with the scale e Verify that the AC power socket outlet is properly protected Note Please charge the battery before using the scale for the first time CS 250 Series Chair Scales Service Manual Installation RS 232 Connecter a A USB Connecter UAB Load cell Connecter Adaptor Jack e Place the scale on a table e Connect the adaptor pin in to the scale adapt
8. emote display ASF ASK mode Command R read data Command T Tare Command Z Zero 12 CS 250 Series Chair Scales Service Manual Fe Lon P Ente Another mode to send data continuous P StAb Send data when the display stable F3 bF bL on Set the backlight always on bL oFF Set the backlight always off bL AU Set the backlight automatic on FY Str Skr on Multi tare operation turn on Str of Multi tare operation turn off ECH Pin Press password to enter into the technical parameter Pl SPd SPd 15 SPd 15 To select display AD speed SPd 30 SPd 60 Cur UE Select to current weighing unit kg Pe CAL kg Ur Uk lb Select to current weighing unit Ib CAL U Select to calibration unit kg kg CAL UE lb Select to calibration unit Ib To select scale decimal points Options E OQ C UB C 000 LODOD dESC CUDODOU To select scale division increment Options d m dwu dwg dw B int dw O dw 50 CAP Select to set scale capacity Scale Calibration details check the calibration CAL section To modify the calibration kr y This display will be show XXXXX For trimming the load cells showing primary weight You can calculate new rate by this formula N2 N1 N1 x K2 K1 K2 N1 primary rate N2 new rate K1 calibrate weight K2 display weight Cont To show the scale internal count rESEE Reset the scale SEELrH Set the local gravi
9. k the weighing unit and parameter settings Check the load cell Platform Corner Weight different Over load protection stoppers or transport locks are not removed Load cell or mechanism damaged Check the stoppers and locks under the platform Use accurate weight for to do the calibration Check the load cell Battery not charging Mains voltage problem Charging circuit problem Battery Problem Check the mains and adaptor Check the battery Check the charging circuit 22 Brecknell Weighing Products 1000 Armstrong Dr Fairmont MN 56031 Toll free 800 637 0529 Tel 507 238 8702 Fax 507 238 8271 e mail sales brecknellscales com www brecknellscales com
10. luences Check the following e Water e Corrosive materials e Vibrations or temperature or wind e Physical damage Check the scale cables for damage and check all connections and connecters for any loose contact or incorrect connection 18 CS 250 Series Chair Scales Service Manual Cleaning e Disconnect the power before cleaning e Use a cloth with mild suds and light cleaning agents e Make sure that fluid not able to get into the device e Use a clean and soft cloth for rub off 11 2 Error Codes Error Code Description POSSIBLE CAUSES Err 4 Zero range exceeded due e Goods on the platform to turning on or by pressing e Overload when 20 zeroing the scale e Improper calibration e Load cell problem e PCB problem Err 6 A D Count out of the range e Platform not installed e Load cell problem e PCB problem Err 18 Auto zero out of limit e Remove the goods from the chair and turn on again 11 3 Determine the Problem Determine whether the problem is in the PCB or the Load Cell e Remove power from the system and disconnect the load cell connection from the PCB e Connect the PCB to a load cell simulator e Reapply power and test the PCB e If problem goes away its source is probably in the Load cell Check the wiring connecter load cell and mechanical components of the load cell If problem persists its source is probably in the PCB Check the PCB voltages connecters cables and
11. mal weighing mode 10 CS 250 Series Chair Scales Service Manual 6 5 BMI function BMI Press h 4 key on the weighing mode display will show the last setting of the height value xxxxxx and BMI indicator will turned on Press key to select the height to cm inch 20 it te BMI If necessary use h 4 and h 14 keys to setting new height value then press 3 key confirm o will be show the BMI graphics bar and weighing value BMI Press h 4 key will turn back to weighing mode BMI indicator will be turned off 6 6 Unit change Press key to select the weight unit kg lb When in BMI settings it can select to cm inch 11 CS 250 Series Chair Scales Service Manual 7 PARAMETERS Enter the Menu R e Inthe normal weighing mode press e key e Display will be show Fl oFF Choose the Menu Sub Menu e Press e it can choose menu block or options one by one Enter the Selected Menu e Press bey it can confirm which will be shown displayed Enter in to TECH gt 0 Pom e When display showed F i m press ED and k lt 4 keys to enter the function Escape from the Menu e Pressk d key it can escape from the menu to weighing mode Parameter Block Menu Sub Description Menu Fl oFF oFF U oFF 3 To set to turn off scale automatically as per oFF 5 selecting time when scale not in use oFF IS oFF 30 P Cont Send data continuous SE rE Set the r
12. or jack Adaptor jack is locating rear side of the scale e Adaptor connects into your AC power socket Pluggable equipment must be installed near an easily accessible socket outlet with a protective ground earth contact e Turn on the On Off key If you want to turn off press the key again e Display will be show the version number and will be starting self checking e After self checking display will be come to normal weighing mode e Warm up time of 15 minutes stabilizes the measured values after switching on e Calibrate with exact calibration weights minimum 1 3 of the scale capacity want to use for calibration For calibration see details in parameter Then you can start your operation CS 250 Series Chair Scales Service Manual 5 DESCRIPTION Key Board Brecknell 00886 8 Turns the scale power On Off Set to hold mode Set to BMI mode Enter into the menu Sets display to Zero Subtracts weight of container Set weight unit CS 250 Series Chair Scales Service Manual Display W1 W2 DRINK PT BMI HOLD EE MI M2 M3 M4 STABLE em ZERO 4 aS gt U IT hr IN IN GROSS DISPLAY FUNCTION STABLE Indicator for Display stability ZERO Indicator for Zero display TARE Indicator for Tare display NET Indicator for Net weight GROSS Indicator for Gross weight BMI Indicato
13. r for BMI operations Indicator for BMI graph Cm inch Indicator for measuring units Lb kg Indicator for weight units Indicator for Charging status of battery TA Voltage has dropped aa Low Voltage law am wsz Fully Charged CS 250 Series Chair Scales Service Manual 6 OPERATION Initial Start up Warm up time of 15 minutes stabilizes the measured values after switching on 6 1 Power ON OFF Switch on the scale by pressing h The display is switched on and the self test is started If you want to switch off press the key again 6 2 Zero Environmental conditions can lead to the balance exactly zero in spite of the pan not taking any strain However E can set the display of gt 06 your balance to zero any time by pressing h lt 4 key and therefore ensure that the weighing starts at zero 6 3 Tare The weight of any container can be tared by pressing o key so that with subsequent weighing the net weight of the object being weighed is always displayed Load weight on the pan Press k d key Zero is displayed and tare is subtracted Remove weight from the platform Tared weight is displayed It can set only one tare value It can display with a minus value Press k d key Zero is displayed tare weight is cleared 6 4 Hold function a The weight gt 20d of any container can be hold by pressing EA key the weight value will be hold on the display press KA key again will turn back to nor
14. s unacceptable then contact your distributor Note Useless battery should be want to use for recycle 16 CS 250 Series Chair Scales Service Manual 10 RS 232 OUTPUT The CS 250 Series of scales can be ordered with an optional RS 232 output Specifications RS 232 output of weighing data ASCII code 600 9600 Baud No Parity RS 232 9pin D type connector 1 2 3 4 5 THW 6 7 8 9 Pin 2 RXD Input Receiving data Pin 3 TXD Output Transmission data Pin 5 GND Signal ground 9pin D Connecter Computer Printer Scale Pin 2 Pin 3 Pin 3 Pin 2 Pin 5 Pin 5 Note If data is not getting in PC Printer want to inter change one of the Pin 2 and Pin3 connections a AG ee CS 250 Series Chair Scales Service Manual 11 MAINTENENCE AN WARNING A DISCONNECT ALL POWER TO THIS UNIT BEFORE INSTALLING CLEANING OR SERVICING FAILURE TO DO SO COULD RESULT IN BODILY HARM OR DAMAGE THE UNIT U AN CAUTION e Permit only qualified persons to service the instrument e Before connecting or disconnecting any components remove the power e Failure to observe these precautions bodily harm or damage to or destruction of the equipment 11 1 General If the scale does not operate properly find out the problem as possible Determine whether the problem is constant or alternate Be aware that problems can be caused by mechanical or electrical inf
15. ter than 10 of full scale capacity then the load cell will require replacement 20 CS 250 Series Chair Scales Service Manual 11 5 Check PCB Voltages If the problem is in the PCB use a multimeter to check the following voltages 11 5 1 AC Power Check the AC power socket out put voltage e Voltage must be a 20 and 10 of the normal AC voltage 11 5 2 Adaptor Voltage Check the adaptor output cable connecter voltage e Voltage must be minimum 9VDC and maximum 15VDC 11 5 3 PCB Input Voltage Check the PCB input power connecter voltage e Voltage must be minimum 9VDC in to the pin AD 11 5 4 Check Battery Voltage and Charging Voltage 1 Check the Battery Voltage e Voltage must be minimum 6VDC If below the 6VDC connect the adaptor for charging e The battery voltage below the 5 5VDC replace the battery and install new 6V 3 4Ah battery 2 Check the Battery Charging Voltage e Remove the battery connection terminals Red and Black from the battery e Connect the power and turn on the scale e Voltage into the terminal minimum 6 5VDC 11 6 Trouble Shooting Problems Possible cause Common Solutions Display is blank Mains power is turned Check power is getting inside the No self test off Power supply faulty scale and on off switch is working or not plugged Internal Verify the voltages which is on the battery is not charged power labels On Off switch problem Blank display Pan not installe
16. ty value Note When Jumper K2 is connected on the PCB then only can access tch parameters els CS 250 Series Chair Scales Service Manual 8 CALIBRATION Simple Calibration Turn on the scale F Press k 1 4 key during normal weighing display will be show UmLoAd BMI Press h 4 key to confirm display will be show last calibrated 9 9000Ib value 20 a If R use Es and e keys to change new test weight value BMI then press h 4 key confirm Display will be show LoHd Place the test weight on the chair BMI After stable press kd key confirm Display will be show PASS Then will start self test and will come to normal display Calibration Settings in the Parameter Turn on the scale And when in the normal display F Press k 1 4 key to show display Pe CAL BML Press h 4 key to enter calibration Display will show CUr Utib E Press h 4 key display will be show Fl aFF F Press h 14 key until to display ECH Press h 4 key to confirm display will be show 200 Few Press S and kh 4 keys display will be show Pl SPd Ed Press h 4 key to choose the weighing unit kg lb for to select unit of BML current operation press k lt _d key to confirm Ma show CAL Uklb Press k A key to choose the calibration unit kg lb for to select unit of BMI calibration press K lt _4 key to confirm Display will show dESC 14 CS 250 Series Chair Scales Service Manual CAL
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