USER MANUAL pH*K 2 1 - NWK
Contents
1. 58 Page 5 NAMS Technology Different pH values in meat and their significance short version pH value pH is a unit of measure which describes the degree of acidity or alkalinity of a solution pH potentia Hydrogenii strength of reaction of free hydrogen ion in one litre solution The value is the negative logarithm of hydrogen ion concentration acid range 0to 7 neutral 7 alkaline range 7to 14 The pH value of a living muscle is about 7 0 After slaughtering processes take place which cause a gradual reduction of the pH value from initial values of 7 down to values between 5 3 and 6 5 This reduction is mainly caused by the production of lactic acid by glycolysis of the carbohydrate glyco gen in the muscle this production of lactic acid stops about 24 hours after slaughtering The speed of the pH value reduction and the level of the final pH value pH 24 h are different de pending on the animal and do considerably affect the quality of meat PSE and DFD meat PSE meat Pale blab S Soft weich E Exudative w Drig wasserl ssig 45 minutes after slaughtering the pH value is already below 5 8 PSE meat doesn t appear evenly over the whole carcass but mostly 25 32 96 in cutlets and hams Muscular rigidity takes place much quicker Disadvantages of PSE meat The loss of weight due to hanging is twice as high as in normal meat Damp surface strong germ increase PSE2. together to terminate the output return to measuring mode Page 16 NAMS Technology Selection of output data press 5 times range Here you can select the output data ready Ready Back to range number Selection of the current number 0 9999 mark Selection of the marking 0 9999 pH value 1 Selection of the pH 1 pH0 00 to pH99 99 pH value 2 Selection of the pH 2 pH0 00 to pH99 99 S ATTENTION If you want to transfer specific data to the printer please refer to CHAPTER 6 page 25 press 1 time return to measuring mode Deletion of data press 6 times Delete is the clearing deleting function ATTENTION If you wish to delete data please refer to CHAPTER 7 page 26 If not press the following key press 1 time return to measuring mode Page 17 NAMS Technology ll Adjustment of special functions press 7 times special fun indicates the input routine for special functions 0 to 9 gt ATTENTION If you want to change special functions please refer to CHAPTER 8 page 27 If not press the fol lowing key press 1 time return to measuring mode Page 18 NAMS Technology Selection of the output device equipment The selection of the output device is of great importance for data transfer The system does offer you two possibilities for data transfer to a printer or to a PC scale You have to select the device re quired here
3. cceeeeeeeeeee hene hi ene e sene risen ee eee s renean nene 27 NAMS Technology Special 27 End of special functions and back to measuring mode 27 sp cial FUNCTION NEED 27 Test of the watchdog timet 27 special FUNCTION M R AER Ra EN Ea 27 Selection of the measuring precision decimal point digits esee 27 TOTEM 27 Adjustment of the temperature for the measuring medium 27 special FUNCTION 29 m rking mode HR 29 Nati Teiro mE 29 Remote control thode i e eie 29 special Uncle cotra us acu utut uiui belt oa Ee ostro OE 30 Input values first calibration solution 30 special FUNCTION 7 i a d 30 Input values second calibration 5 30 SPECIAL Junction PUER 31 Adjustment and output of firmware 31 Description of special function 8 5 32 Subfunction 0 No execution of special function
4. 32 Subfunction 1 Printing of a pH K21 status record 32 Subfunction 2 Adjustment interface speed sees eene 32 Subfunction 50 Adjustment lifetime 4 32 Subfunction 65 Receiving addresses or customer data from the 32 Subfunction 68 Printout of addresses customer 33 Subfunction 70 Printout of an error and calibration report eese eene nennen 34 Subfunction 76 Deletion of addresses customer data 35 Subfunction 80 Adjustment of data transfer record for 35 Subfunction 83 Change language of the pH K21 35 Subfunction 99 View analog 811 5 36 Subfunction 102 START LOAD 180 coccissiessnnsicasncendessatessnasacsctnasnescsnatsnscieasonecteasonesdessouoecesssaneduasscadseaiaestdaaswonts 36 Subfunction 103 START LOAD Q iiic eite 36 Subfunction 104 RESTART AKKU Tbeb SE ERI S EON QE SEC aseo ETAT DRE RET Reo ER 36 Subfunction 193 SEND FIRMWARE DATA eese 36 Subfunction 194 RECEIVE FIRMWARE 36 special JUNCHON 37 Calibration Of th pH K21 iui et tre e e ente n e ETENE O nia AE E ETENE EE E 37 POSSIBLE ERRORS DURING CALIBRATION i eee cabs esee
5. 19 Display Input d te and Hime 20 Display load status 21 20 CHAPTER HM nter 21 ADJUSTING A NUMBER WITH 21 21 O LRL 22 CHANGING THE CURRENT NUMBER 22 CHAPTER HE 22 CHANGING OF THE MARKING TATTOO 22 4 EE M 23 SELECTION OF THE DISPLAY MODE csccccccssecccevecceccuscceccusececeueecsceuseceseucecsceusecsseueesecsueecessueecessueecssuueecsceueesessueeseeaneees 23 CHAPTER 5 KESS 24 DATA OUTPUT TO PPDPP C OR PRINTER ee Cu eI i 24 25 OUTPUT RANGES DATA SELECTION reto ese ret ac exaratae aget danen e ed eve etate ee ad vae eae vea 25 CHAPTER 7 2 26 PJ BVE TION OR DATA 26 CHA dud UU o ise sinests edccveseesdusetusscvstesvecsetnescvsedssscusetseSccsetesstusedsesssetsesdusetsescvss esstuvetescvss sesduvetsescvssiestusetvescvsstses usetss 27 ADJUSTMENT OF SPECIAL FUNCTIONS cccccsssssssssssssssssssssssssssssssssssssssssssssssscsccccccccccsscccscccscccscssscscscsees 27 MEANING OF THE SPECIAL FUNCTIONS
6. special fun decimals 1 One digit after the decimal point special fun decimals 2 Two digits after the decimal point To change the number please see CHAPTER 1 page 21 special function 3 Adjustment of the temperature for the measuring medium Here the temperature of the momentary measuring medium is adjusted special fun tmp 20 C display of the momentary temperature After pressing the key 4 special fun temperature 20 0 C appears and under the last digit the cursor blinks Page 27 NAMS Technology lil To change the number please refer to CHAPTER 1 page 21 Page 28 NAMS Technology special function 4 Input marking mode Here you can decide if the marking tattoo number is the same for every measurement or if it should be put to zero 0 after one measurement Under usual working conditions this marking remains the same until the user changes it special fun mark mode leave The marking remains The value entered doesn t change after one measurement This is the normal mode and it can be used for tattoo number and so on special fun mark mode cleared The marking is put to ZERO The value entered returns to zero after one measurement This is a special mode and it can be used for complaints and so on To change the number please refer to CHAPTER 1 page 21 special function 5 Remote control mode To set the pH K21 to remote control mode please select special fun remot
7. This is the standard ad justment 1 Customer specific data format Instead of the ACK NAK confirmation the current number is used for handshake Subfunction 83 Change language of the pH K21 With your pH K21 you can choose among 5 languages 0 German 1 English 2 French 3 Italian 4 Spanish 5 Polish Page 35 NWYX Technology i Subfunction 99 View analog digits This function is only for service purposes and must not be activated by the user Subfunction 102 START LOAD 180 This function is only for service purposes and must not be activated by the user Subfunction 103 START LOAD 0 This function is only for service purposes and must not be activated by the user Subfunction 104 RESTART AKKU This function is only for service purposes and must not be activated by the user Subfunction 193 SEND FIRMWARE DATA This function is only for service purposes and must not be activated by the user Subfunction 194 RECEIVE FIRMWARE DATA This function is only for service purposes and must not be activated by the user S ATTENTION If you get stuck in your selection or if you don t know what you want to select please wait one min ute without pressing any key and the pH K21 automatically switches off By pressing the key you can start the input again ATTENTION There are more special functions not described because of security reasons They are only for service
8. The electrode has to be changed clearing Change the electrode Electrode error steepness cause You have a wrong calibration solution or the electrode or the measured value amplifier repeater are defective clearing Control the calibration solutions If the error message is still given please change the electrode If the error message still appears please call your service Electrode zero error cause You have a wrong calibration solution or the electrode or the measured value amplifier repeater are defective clearing Control the calibration solutions If the error message is still given please change the electrode If the error message still appears please call your service Page 45 NAMS Technology Error Blinking display The left side of the display is blinking cause 1 clearing cause 2 clearing The pH K21 is in remote control mode This is not an error It only indicates that the pH K21 is in remote control mode Part of the firmware data is not initialised Please call your service The whole display is blinking No further measurements are possible cause 1 clearing cause 2 clearing cause 3 clearing Calibration got lost Please carry out a new calibration according to the user manual The pH electrode is damaged a because of mechanical destruction b because of natural ageing Renew the pH electrode The measuring electronic is not working corr
9. To put the pH K21 into operation press this key for approximately second the pH K21 turns off automatically one minute after the last operation If the instrument is switched on measurement is released and automatically stored with the key Before starting measuring please observe the following points e 5 the measuring temperature adjusted correctly e Is the instrument calibrated e Is the output format adjusted correctly e Is the right pH value measured pH1 pH2 Adjustment according to the measurements required There are the following possibilities to measure the pH value e without connection to printer or PC gt adjust out device none e with direct data transfer to PC gt adjust out device PC EDP e with direct data transfer to scale gt adjust out device PC EDP e with direct data transfer to printer gt adjust out device PRINTER After releasing a measurement the pH K21 automatically checks if the corresponding equipment is connected If the connection to the output equipment is not confirmed within 20 seconds an error message is given During this stand by period no further measurements can be carried out To adjust the output equipment please see Adjustment of the output equipment printer or PC page 41 gt ATTENTION In case of incorrect default settings or defective output equipment the pH K21 displays an error message You can then correct the default settings ATTENTION Please
10. Choose selection range for pH 2 mark Choose selection range for marking number Choose selection range for current number To change the number please refer to CHAPTER 1 page 21 press Now you enter the from value To change the number please refer to CHAPTER 1 page 21 Afterwards you enter the to value To change the number please refer to CHAPTER 1 page 21 For the change the following areas are valid number mark pH value 1 pH value 2 ATTENTION 0 99 99 0 99 99 0 00 99 99 0 00 99 99 current number marking pH2 All selection areas can be used in combination If your pH K21 does not output data please check the adjustments mentioned above After determining the output selection the pH K21 goes automatically back to the data output mode and you can enter the output address Page 25 NWY Technology CHAPTER 7 Deletion of data press press 1 time press 1 time as long as Delete appears This mode allows you to delete data The display shows the following data delete No 0 Select data delete No 5ordata delete No 7 To change the number please refer to CHAPTER 1 page 21 No 5 Here all data in the area FROM current number to TO current number are deleted To enter the selection please see CHAPTER 6 page 25 No 7 Here all data stored in the pH K21 are deleted The remaining numbers do not have a
11. Data transfer Data transfer to PC EDP Data transfer to printer or PC doesn t function Data transmission record Date and time Date of repair Date of shipment Day Deletion of addresses Deletion of data Display current voltage of the accumulator E Error and calibration report Error numbers causes and clearing Error treatment in the pH K21 Errors which appear in practice F Firmware Firmware reset H Hour 50 10 12 13 30 12 24 21 33 14 31 54 35 45 32 29 21 32 53 15 22 13 31 24 25 50 47 45 47 40 32 32 14 33 26 14 32 41 41 45 31 32 14 1 IBM Identification Input of output range Input read in and display routine for marking Instrument data Interface speed L Language Left side of the display is blinking LIST OF CONTENTS Loading condition M Marking Marking mode 13 13 13 32 31 33 46 14 22 28 Measurement of pH1 pH2 or first pH1 and then pH2 measurement of pH2 Measuring frequency Measuring precision Measuring range measuring the pH value Minute Month N Number of customer Number of technician 23 13 8 56 56 12 14 14 32 32 NWK Bin r Soft und Hardwareentwicklung GmbH 2 Output equipment Output of the data stored Output ranges Output to PC EDP or scale Output to printer Partial deletion pH K21 Pin configuration PREFACE Printer or PC Printing Printout of addre
12. Explanation The pH K21 sends a complete data packet to the PC The PC is decoding the data received accord ing to the rules mentioned above and detects if they can be read as a message or as a complete data record If this is the case the computer sends an receipt confirmation to the pH K21 and the next record can be sent The positive response is an ACK the negative one a NAK If the pH K21 doesn t receive an ACK but another sign the record is sent again If the pH K21 doesn t receive any response the data record is sent again The data record is sent up to a maximum of three times If there doesn t come any positive response from the PC by then an error message is given If the initial response was an ACK the next measurement can be carried out With out device and the command PC data can be transmitted without interruption Transmission of complete data to PC The last data record consists of only one parameter for example STX 1 ETX BCC For the PC this means the end of the data transmission Page 53 NW Technology ii Technical requirements Baud rate 9600 baud or bit per second Parity none Data bits 8 Stop bits 1 Handshake no or DTR DSR Apart from 9600 the following values can be chosen for baud rate 600 1200 2400 4800 19200 The initial adjustment 9600 It should only be changed in an emergency as all instruments known by us have no problem with this initial adjustment If th
13. display start clock start to set the time adjusted C ATTENTION You can stop adjusting date and time by pressing the keys aly together at any time Page 42 NWYX Technology i Error treatment in the pH K21 In the pH K21 errors are described by the display Error which blinks followed by the error number for example 20 Error numbers causes and clearing The following error numbers are defined in the pH K21 Error number description 0 no error 10 error data input cause Incorrect date For example 02 30 1994 clearing Enter a valid date 20 printer inoperable cause Data output shows PRINTER and printout should be re leased Printer is not connected Printer is not switched on Printer has paper The printer cable is defective clearing Clear the causes mentioned above If the error message is still given please call your service 30 PC EDP not connected cause Data output shows PC EDP and data should be output PC is not connected PC is not switched on PC software didn t start PC cable is defective clearing Clear the causes mentioned above If the error message is still given please call your service 31 PC EDP no response or incorrect response cause clearing Data output shows PC EDP and data should be output PC is not connected PC is not switched on PC software didn t start Data transfer to PC is not adjusted correctly PC cables defective To adjust the data transf
14. electrode change are also backspaced For controlling electrodes this number should only be entered when using an electrode for the first time To change the number please see CHAPTER 1 page 21 The calibration value set normally solution 1 6 88 is displayed A number is displayed at the bottom left Now the probe has to be put into the first calibration solution Please wait until the number stops changing With pH 7 00 this value is theoretically 0 With pH 6 88 this value is theoretically 32 The value can differ by 270 and keep pressed until the display shows calibrate please wait The first measuring point is now calibrated Afterwards solution 2 appear with the value adjusted under special function 7 Normally 4 00 A number is now displayed at the bottom left Now the probe has to be put into the second calibration solution normally 4 00 Please wait until the number stops changing With pH 4 00 the value is theoretically 804 The value must not differ by more than 160 plus calibration value 1 and keep pressed until calibrate please wait is displayed The second measuring point is now calibrated Page 38 NAMS Technology ii Possible errors during calibration 1 The pH electrode was put out of the standard buffer solution during measuring Repeat calibration according to the user manual 2 The standard buffer solution is polluted and therefore not uniform Renew calibration solution and calibr
15. hours the accumulator can not be overloaded If necessary the pH K21 can be permanently used with the power supply Watchdog timer The pH K21 does have a watchdog timer which checks the function of the instrument If the instru ment shouldn t turn off at any time no power supply connected please put the plug of the power supply in the hub of the pH K21 without putting the power supply in the socket of the network The instrument does turn off now IMPORTANT NOTICE The instrument should be cleaned after use Page 57 NWY Technology ii Technical data measuring range pH measuring precision temperature compensation serial interface number of storable measurement operation temperature range storage temperature range CPU pH 2 to 14 0 03 pH automatically 600 19200 baud 4000 0 80 C 20 C 80 C 16 Bit microcontroller Page 58 NAMS Technology Index Copyright A Activating the pH K21 Address number Adjusting a number Adjustment of data transfer record for PC Adjustment of the output equipment Authors and developers of the pH K21 B Baudrate BCC Block Control Check Calibration Calibration is not possible Calibration record Calibration solution Cancel Change of electrode Commands in the remote control mode Control functions Current number Current pH value Customer data from the PC D Data output Data selection
16. meat is not suitable for e canned ham high degree of jelly secretion e smoked rolled fillet of ham considerable loss of weight bad colour consistency e raw sausage bad consistency wrinkles e sausage to be heated in water Page 6 NWY Technology DFD meat D Dark dunkel F Firm fest D Dry trocken 45 minutes after slaughtering the pH value is still above 6 3 The meat is of dry dull sticky or gluey consistency and dark red colour Disadvantages of DFD meat The increase of undesired microorganism is supported by the high pH value i e the missing leaven ing The meat is putrefying instead of ripening The loss of weight due to hanging is higher than in normal meat The perishability is reduced considerably DFD meat is not suitable for e foil wrapping of whole pieces putrefaction at 2 C within 7 days e foil wrapping of portions putrefaction at 2 C within 2 or 3 days e foil wrapping sliced cold meat e raw sausage partially suitable in case of high nitrate concentration e salt meat Page 7 NAMS Technology ii General description pH K21 The pH K21 is hand probe which is easy to use and absolutely suitable for slaughterhouses The following characteristics do clearly point out the instrument s usefulness e Absolutely waterproof and fail safe to breakage e Easy to handle uncomplicated and free from interference e High measuring frequency with up to 600 measurements per hou
17. out an error and calibration record as follows Instrument data Number of instrument 2 Number of technician E Number of customer 1 Date of shipment 22 02 94 15 00 00 OK Date of repair 22 02 94 15 00 00 OK Change accumulator 22 02 94 15 00 00 OK Change electrode 22 02 94 15 00 00 OK Total measurements 64 Calibration record ES RE 22 02 94 16 51 30 OK Explanation Number of instrument Serial number of the instrument Number of technician Number of the responsible technician Number of customer Number of the customer the instrument was shipped to Date of shipment Date and time of the first shipment of the instrument Date of repair Date and time of the last repair Change of electrode Date and time of the last electrode change Total measurements Number of measurements carried out with this electrode El 5 Date time and status of the last calibrations RE Date time and status of the last firmware reset Page 34 NAMS Technology Subfunction 76 Deletion of addresses customer data Addresses which were transferred to the pH K21 with special function 65 see Subfunction 65 Re ceiving addresses or customer data from the PC page 32 can be deleted completely Subfunction 80 Adjustment of data transfer record for PC Here you can fix the data transfer record for the PC 0 Normal data transfer record as described under Data transfer of the pH K21 to a PC page 49
18. pH 1 pH value 2 Output sorted according to pH 2 time pH 1 Output sorted according to time of pH 1 time pH 2 Output sorted according to time of pH 2 To change the number please refer to CHAPTER 1 page 21 If addresses are existing If there are addresses stored in your pH K21 you can here select the number of the address which should be output now adress no none No address adress no 1 999 address number 0 to 999 To T the output key please refer to CHAPTER 1 page 21 press and together to end the output S ATTENTION If you haven t connected an output device printer PC EDP scale but selected an output range please wait 20 seconds and the instrument will send the corresponding error message After confirm ing the error message the pH K21 is again free for measurements During a printing process you get the following display sending date please wait After terminating this process the instrument automatically returns to the measuring mode Sometimes it is necessary to enter a printout area before data output Therefore please refer to CHAPTER 6 page 25 Page 24 NWY Technology CHAPTER 6 Output ranges data selection press as long as range appears range indicates the area 55 Here appears the range of the output area The following selections are possible ready Ready Back to output data End of selection pH value 1 Choose selection range for pH 1 pH value 2
19. purposes and are of no significance for the user Do not call any other subfunctions other than those described above Page 36 NAMS Technology ii special function 9 Calibration of the pH K21 Before starting calibration the following conditions must be fulfilled 1 ps Led p m Important note To calibrate the pH K21 it is necessary to use the protective case During calibration the pH tip must be put in the calibration solution standard buffer solution together with the metallic casing of the glass electrode There must not be any deposition on the electrode if necessary the electrode must be cleaned The pH values of the calibration solution must have been entered correctly See special function 6 page 29 and special function 7 page 29 The calibration solution must be filled in an appropriate receptacle The calibration solution should have room temperature approx 20 C 25 C press as long as special fun appears on the display press select press 8 times as long as calibrate appears press 1 time select appears Page 37 NAMS Technology press 1 time press 1 time press 1 time press 1 time press 1 time press 1 time electrode new No appears If you put in a new electrode and this is the first calibration you can com municate this to your pH K21 by entering the number 523 The number of insertions and the date of the
20. quality measurement in meat The measuring probe made of V2A high grade steel with automatic protection of the electrode is covered by a protective steel case A telescopic sleeve guarantees that the glass electrode will only leave the protective steel case for the measuring process Unintentional damage to the electrode is therefore largely prevented by this protective measure steel for use in the food environment 1 4301 Page 9 NAMS Technology i Data transfer The pH K21 allows data transfer to any IBM compatible printer with serial interface and or to an EDP equipment or host computer as well as to scales both simultaneous to measuring and after measuring The pH K21 guarantees this thanks to its internal microcontroller The pH K21 can also be set to special remote control mode which means that it can be used from EDP equipment Data can be selected or sorted as needed and can be output afterwards A criterion can be individu ally specified Data can be sorted according to e current number e additional mark or sign e value pH 1 e value pH 2 or e time Page 10 NWYX Technology i Basic terms pH K21 DE RETURN UP DOWN CANCEL Confirmation Enter Switching on the pH K21 Display moves upwards next number next input point Start measurement Display moves downward previous number CANCEL of input Page 11 NAMS Technology ll Activating the pH K21
21. the following key Display load status pH K21 press 14 times press 1time load status Loading charging conditions pH K21 NO POWERSUP No power supply connected 1 minute test Accumulator status determination One minute discharging Short test accumu lator DISCHARGE Complete discharging of the accumulator CHARGE Recharging of the accumulator life charge Loading charging conservation of the accu mulator return to measuring mode Page 20 NAMS Technology ii CHAPTER 1 Adjusting a number with the pH K21 To change a number in the pH K21 please proceed as follows Choose the number which has to be adjusted for example current number see CHAPTER 2 page 22 press 1 time press 1 time press 1 time aly together the number changes by upwards By constant pressing the number keeps changing upwards up to max 9999 By pressing this key longer than 0 5 seconds the numbers change by approx 30 signs per second With more than 100 changes approx 3 5 seconds the number is changing in steps of 10 the number changes by 1 downwards By constant pressing the number keeps changing upwards By pressing this key longer than 0 5 seconds the numbers change by approx 30 signs per second With more than 100 changes approx 3 5 seconds the number is changing in steps of 10 the number is selected and the display goes back to the current pH value CANCEL By pre
22. 145520 130394 150020 e g Explanation of the data items A Number of data items in this data record including this item The data record is now limited to 9 data items Because of expansion this number should be evalu ated as the number of data items can be increased without announcement This item can have 1 to 3 digits K Key for pH data 1 For the LT K21 the key is 2 This item can have to 3 digits In the example 1 F Error code probe Here an error code can appear so that the EDP can check if the pH K21 is still OK This item can have to 4 digits In the example 0 no error NUMBER Current number measurement This item can have to 4 digits In the example 123 MARK Marking of measurement tattoo complaint This item can have to 4 digits In the example 4321 Page 50 NWY Technology ii pH2 DATEI TIMEI DATE2 TIME2 Please note The value of measurement pH1 hundredth pH without decimal point this item can have 1 to 4 digits in the example 5 96 The value of measurement pH2 hundredth pH without decimal point this item can have 1 to 4 digits in the example 5 71 Date of measurement in the format MMDDJJ TT day MM month JJ year This item always has 6 digits In the example 12 March 1994 Date of measurement in the format HHMMSS HH hour MM minute SS second This item always has 6 digits In the example 14hou
23. AND DEVELOPERS 21 2 DIFFERENT PH VALUES IN MEAT AND THEIR SIGNIFICANCE SHORT VERSION 6 ido ALB 6 PSE E DU LIB RAE EM 6 DIDIT C 7 GENERAL DESCRIPTION PEH K02 8 Dota sss E LE EE 10 BASIC TERMS 21 11 ACTIVATING THE PH K27 12 ADJUSTMENT ACCORDING TO THE MEASUREMENTS REQUIRED sscccccseecceceescceceecceceueccececccseeuecceeeuecsessueceseaecessaueeeees 12 CONTROL QE BD EO W LO Ic 13 HOW TO CALL THE CONTROL ttre 15 Display of the pHzyalue is ESR 15 EE 15 Display of the marking 15 Selecting the current 16 Data output to printer OF 16 Selection Of output 17 Del tion of data EET 17 Adjustment of special functions resisto R RE E A E E ERAS 18 Selection of the output 19 Vonage display ssa
24. NAMS Technology USER MANUAL pH K 21 Hand probe for meat quality measurement Version 5 nn alpha numeric Date of issue 01 05 2011 NWK Technology GmbH Anton Happach Str 13 86932 P rgen Lengenfeld Tel 49 8196 9311063 Fax 49 8196 9311068 e mail info nwk LL de Internet www nwk LL de C Copyright by NWK Technology GmbH Page 1 NW Technology i PREFACE Authors and developers of the pH K21 Joachim Brammer Total conception leadership development programming of firmware Philipp Gianfrate Measuring technology Marianne Hofstetter Revised edition of the script Copyright by NWK Technology GmbH Anton Happach Str 13 D 86932 Piirgen Lengenfeld Germany Tel 49 8196 93110 63 Fax 49 8196 93110 68 ATTENTION This user manual and the corresponding software are protected by copyright It is strictly forbidden to copy duplicate or sell this user manual and or the software in any way without the permission of NWK Technology GmbH IBM PC DOS and SAA are registered trademarks of International Business Machines Corp MS DOS MS Windows are registered trademarks of Microsoft Corp All additional programs and or company names used in this user manual are also registered trade marks and must not be used for commercial purposes or in any other way Page 2 NAMS Technology LIST OF CONTENTS EEE AT TT E EEE TT E OEO EERTE REE ET TITE OTET 2 AUTHORS
25. NTION If you want to change the current number please turn to CHAPTER 2 page 22 If not press the following key press 1 time return to measuring mode Display of the marking tattooing press 2 times mark indicates the input read in routine for the marking ATTENTION If you want to change the marking please refer to CHAPTER 3 page 22 If not press the following key press 1 time return to measuring mode Page 15 NAMS Technology ii Selecting the current measurement press 3 times C ATTENTION meas mode is displayed pH 1 measurement of the first pH value for example pH45 pH 2 measurement of the second pH value for example pH24 pH 1 2 first measurement of and then measurement of pH2 for example first cutlet and then ham To change the measuring mode please refer to CHAPTER 4 page 23 If not press the following key press 1 time return to measuring mode Data output to printer or EDP press 4 times press 1 time output data indicates the adjustment mode for data output If the output equipment should be a printer you will now be asked for the sorting none no sorting number sorting according to the current number mark sorting according to the marking pH 1 sorting according to pH 1 2 sorting according to pH 2 time pH 1 sorting according to time of pH 1 time pH 2 sorting according to time of pH 2 Press the keys
26. alibration to eliminate this error measuring tip is defective because of mechanical destruction Please contact your service What happens if the display is inversed light fonts on dark background no firmware reset has been carried out Please contact your service What happens if the display shows record used The display indicates that you have already carried out a measurement under this number What happens if the display shows full The display indicates that you have already carried out the 4000 possible measurements These measurements will be kept until storage To clear this error please refer to CHAPTER 7 page 26 Page 48 NAMS Technology ii Technical description of data transfer to PC EDP Data transfer of the pH K21 to a PC Legend sign decimal SOH 1 STX ETX EOT ENQ ACK BEL NAK 2 ESC 27 WANK WN BCC Block Control Check hexadecimal Olh 02h 03h 04h 056 06h 07h 15h bh Compilation data transmission record STX Data ETX BCC Explanation Start sign STX Data End sign ETX Checksum BCC Block Control Check Number signs Byte different Variable data record length 1 Byte Byte Page 49 NAMS Technology Compilation data record All data record entries are separated by a comma One data record consists of the following data items A LFNR KENN pH1 pH2 DATUMI UHRZEIT1 DATUM2 UHRZEIT2 9 2 0 123 4321 596 571 120394
27. ate again 3 The pH electrode is damaged because of mechanical destruction natural ageing Renew the pH electrode 4 The measuring electronic doesn t work correctly Please call your service and send the pH K21 for inspection S ATTENTION If you get stuck in your selection or if you don t know what you want to select please wait one min ute without pressing any key and the pH K21 automatically switches off By pressing the key you can start the input again To guarantee 100 per cent functionality of your instrument the pH K21 is calibrated before using The calibration solutions should have room temperature approx 20 C 25 C Page 39 NWY Technology Changing of the electrode 1 Removing the electrode e Please remove the protective cap at the top of the electrode e Please remove the protective case of the electrode screwed e Please remove the slit screws at the flange ring of the steel case 3 screws e Now you can carefully remove the steel case from the electrode e Attention Do not tilt when removing the steel case as the electrode can break e Now the electrode can be removed from the screwing e Now you should clean the surface of the flange ring from corrosion deposition 2 Inserting the electrode e First you have to screw the electrode into the thread e Important The electrode must not be screwed too tight as the socket at the instrument can break Furthermore there must not
28. be any dirt between the electrode and the socket at the instru ment e Now the steel case can be put over the electrode Attention Do not tilt e Please fasten the steel case with the slit screws at the flange ring e The steel case can now be screwed Page 40 NAMS Technology ii Adjustment of the output equipment printer or PC press press 1 time until out device appears You are now in the selection mode for special functions for the output Activate output adjustment None Measurement without output device PC EDP Measurement with PC EDP PRINTER Measurement with printer To change the number please refer to CHAPTER 1 page 21 Page 41 NAMS Technology ii Adjustment of date and time press press press until DATE or TIME appears the display shows date input You can now change the day To change the number see CHAPTER 1 page 21 Press the key You can now change the calendar month To change the number see CHAPTER 1 page 21 Press the key You can now change the calendar year To change the number see CHAPTER 1 page 21 Press the key to display time You can now change the hour to 24 hour format To change the number see CHAPTER 1 page 21 Press the key You can now change the minutes To change the numbers see CHAPTER 1 page 21 Press the key You can now change the seconds To change the seconds see CHAPTER 1 page 21 Press to
29. de pH 2 pH2 value is measured With the next measurement the pH2 value is measured and stored If there has already been carried out a measurement with the current num ber the measurement is automatically related to this number meas mode pH 1 pH 2 First is measured and right after wards pH2 With the next measurement pH1 and then pH2 are measured Only if both measurements were carried out the data record is stored If there is already a measurement with the current number the display shows record used The old measured value is overwritten To change the number please refer to CHAPTER 1 page 21 Page 23 NWYX Technology i CHAPTER 5 Data output to EDP PC or printer press press as long as output data appears For this adjustment it is absolutely necessary to set the out device mode Please find detailed information at out device mode see Ad justment of the output equipment printer or PC page 41 If you have entered a PC or an EDP in the out device mode PC ECP data will be transferred directly now If you have entered data output to PRINTER printer output you will now be asked for a sort specification The following sorting op tions are possible none No sorting necessary Data have already been sorted or the sequence is unimportant number Output sorted according to the current number mark Output sorted according to the marking pH value 1 Output sorted according to
30. do observe the temperature of the measuring medium before starting measuring To adjust the temperature see Adjustment of temperature for measuring and calibrating page 27 Page 12 NAMS Technology Control functions The pH K21 gives you the following control functions After switching on the instrument the current pH value P is indicated By pressing the key you can change the display pH value 1 14 64 pH value 2 14 64 number 1 mark meas mode pH 1 output data range delete current pH value here 14 64 current pH value right after measuring measurement of pH2 is next Input read in and display routine for current number To change the current number please see CHAPTER 2 page 22 Input read in and display routine to mark identification tattooing To change the marking please see CHAPTER 3 page 22 Input read in routine for the display pH 1 measurement first pH value pH1 pH 2 measurement second pH value pH2 pH 1 pH 2 measurement of two pH values in succession pH1 then pH2 please see CHAPTER 4 page 23 Output of the data stored at the equipment selected under output data see CHAPTER 5 page 24 Input of output range selections range area see CHAPTER 6 page 25 Deletion of data delete deletion data delete No 5 partial deletion current number data delete No 7 total deletion see CHAPTER 7 page 26 Page 13 NWYX Technol
31. e ctrl no 5 Please observe that this mode only works if the power supply is connected The display shows remote ctrl The in strument is now ready for remote control operation If the instrument is not connected to a PC you can leave this mode by pressing the keys and 5 together To change the number please refer to CHAPTER 1 page 21 Otherwise you MUST enter 0 zero here All other numbers can make the instrument carry out undesired functions For technical description please refer to Remote control of the pH K21 page 55 Page 29 NAMS Technology 9 press press press press special function 6 Input values first calibration solution Here you enter the pH value of the first calibration solution neutral range 6 88 or 7 0 or similar This function is protected For data input please proceed as follows The display shows the value of the momentarily entered calibration solu tion solution 6 88 The cursor blinks under the last number Normally this value is 6 88 To change the number please refer to CHAPTER 1 page 21 Press keys to return special function 7 Input values second calibration solution Here you enter the pH value of the second calibration solution normally 4 00 This function is protected For data input please proceed as follows The display shows the value of the momentarily entered calibration solu tion The cursor blinks under the last number Normal
32. e display shows record 4 46 What happens if the display shows 46 NAMS Technology TECHNICAL DESCRIPTION OF DATA TRANSFER PC EDP 49 DATA TRANSFER OF THE PHY KZI TOA 49 Compilation data transmission 49 di RE a 50 Data Man eT rena Rn 52 Set up of BCC Block Control 52 Transmission Of 53 Transmission of complete data to 53 TECHNICAL REQUIREMENTS ssssccccccecccsseeeeccccesesusececccceeesusnseecccceessassseecceceesseaueesececeesseuaeseececesesaaansseeceeesseauaneeeseeseeaas 54 Pin configuration for the pH K21 icc rte WE re ir ee TD I ix beer E E d e ED o er UE 54 REMOTE CONTROL OF THE 21 55 TECHNICAL DESCRIPTION REMOTE CONTROL 5 c lt scscesserscssccedvecesuersssnccovsccoeteesesnseeteecnsseesusessvitecesceosusnsssteecnseeosscessrtevevsten 55 Remote control Operation nee es 55 Commands in the remote control mode eese 55 Transmission of a command to the 21 56 RUNNING TIME OF THE ACCUMULATOR CONTINUOUS OPERATION cssccssssssssessssesseessseessseees 57 b wb OL CULjl ol TE 57 TECHNICAL DATA Tc
33. ectly Please call your service Page 46 NAMS Technology ii Errors which appear in practice What happens if calibration is not possible Errors could be caused because of the following reasons incorrectly adjusted values special function 6 and or 7 polluted calibration solution defective tip probe because of mechanical destruction polluted tip probe measuring electronic doesn t function correctly What happens if the current number isn t counted upwards after each measurement Errors could be caused because of the following reasons the output device wasn t adjusted correctly cable connection is defective To clear these errors please refer to CHAPTER 5 page 24 What happens if data transfer to printer or PC doesn t function Errors could be caused because of the following reasons the output device wasn t adjusted correctly data transfer velocity wasn t adjusted correctly e cable connection is defective or any other technical reasons which affect the instrument and therefore printer or PC do not response To clear these errors please refer to CHAPTER 5 page 24 Subfunction 2 Adjustment interface page 32 Page 47 NAMS Technology ii What happens if the whole display is blinking That means that no more measurements can be carried out Errors could be caused because of the following reasons e calibration data has been cleared Carry out a new c
34. er rate please see Subfunction 2 Ad justment interface page 32 Clear the causes mentioned above If the error message is still given please call your service Page 43 NAMS Technology ii Error number 40 50 60 61 70 71 description Marked as used but not found cause Error in the pH K21 memory clearing Delete all data stored in the pH K21 see CHAPTER 7 page 26 pH K21 is full cause No more free memory capacity clearing Delete all data stored in the pH K21 see CHAPTER 7 page 26 Error during calibration of the first value cause During calibration the measured values fluctuate in non permissible tolerances clearing Clean the probe If the error message is still given please call your service Error during calibration of the second value cause During calibration the measured values fluctuate in non permissible tolerances clearing Clean the probe If the error message is still given please call your service Error during reading in of addresses cause Data transfer between PC and pH K21 is disturbed PC is not in transmit mode the wrong programme has been started on the PC clearing Clear the causes mentioned above If the error message is still given please call your service Reading in of addresses cause Data transfer between PC and pH K21 is disturbed PC is not in transmit mode the wrong programme has been started on the PC clearing Clea
35. ere are problems with peripheral devices the reason is in most cases another one see Subfunction 2 Adjustment interface page 32 Pin configuration for the pH K21 Pin 1 RXD brown Pin 2 TXD grey Pin 3 12 red Pin 4 GROUND yellow green GND Pin 5 CTS pink Pin 6 GND blue Pin 7 RTS white Page 54 NAMS Technology i Remote control of the pH K21 Technical description remote control Remote control operation Please put the pH K21 in remote control operation so that the display shows special fun remote ctrl see Remote control mode page 29 The PC should now start remote control operation by ESC L command Eventually a string can be displayed ESC A After sending the command the LCD display shows the normal measured value pH value with the difference that the left digit position is blinking Now the user or the PC can release measurements They are stored by the pH K21 The PC can call these measurements with ESC S if necessary also more times If the measurements of one measuring group are finished and transmitted the PC should send an ESC L command The measurements carried out until this time are marked as sent pseudo de leted and will not be transmitted with the next ESC S command After terminating the remote control operation the PC should send an ESC E command to return to the normal measuring mode If the remote control operation should need to be left without a PC p
36. lease press to gether Commands in the remote control mode The remote control mode does offer the following commands ESC A Display text string The LCD display shows a character string which has to be confirmed with a key or the command ESC X During the display of a string no measurements can be carried out In case of other com mands than ESC A or ESC X from the PC during display the PC re sponses with EOT command understood but not carried out ESC E End of remote control operation Herewith the remote control mode of the pH K21 is left and the instrument returns to the normal measuring mode ESC L Data marked as sent All measurements starting from the last ESC L command are marked as sent and are not transmitted any more with the ESC S command A new series of measurements can be started now Data remain stored in the pH K21 and can be transmitted afterwards at any time ESC M Release measurement With this command the PC can release a measure ment ESC T Measurement without storage and direct transfer of the data record ESC B Measurement without storage and direct transfer of the pH value only ESC S Send data measured up to now ESC X End of display If an ESC A command was sent the display of the char acter string can be stopped Page 55 NAMS Technology ii Transmission of a command to the pH K21 The data record for a command transmission to the pH K21 is struct
37. ly this value is 4 00 To change the number please refer to CHAPTER 1 page 21 Press keys and to return gt ATTENTION The two calibration solutions should cover the range in which measurements are taken Page 30 NAMS Technology ll Special function 8 Adjustment and output of firmware data Special function 8 is divided into several functions for adjusting the firmware internal software of the pH K21 You should not carry out any adjustments here without consulting your service This function is protected For data input please proceed as follows press The display shows special 8 55 special 8 and 0 appears You can now select the function number To change the number please refer to CHAPTER 1 page 21 Page 31 NWYX Technology i Description of special function 8 subfunctions Subfunction 0 No execution of special function This function returns to special fun special 8 see Adjustment and output of firmware data page 31 Subfunction 1 Printing of a pH K21 status record This function is only possible if a printer is connected The adjustments of the pH K21 are output This output is needed for service Subfunction 2 Adjustment interface speed Here you can change the interface speed Baudrate of your pH K21 The following values are possible Number Baudrate 0 600 1 1200 2 2400 3 4800 4 9600 Default 5 19200 Subfunction 50 Adjustment lifetime elec
38. ny significance To change the number please see CHAPTER 1 page 21 The selected function is confirmed and data are deleted The system returns to measuring mode ATTENTION Attention when deleting data Deleted data cannot be restored Page 26 NAMS Technology ll CHAPTER 8 Adjustment of special functions press until special fun appears on the display 55 Special function 1 is already given Select the corresponding number with the key S ATTENTION If you get stuck in your selection or do not know what you wanted to select please wait one minute without pressing any key and the pH K21 is switched off automatically By pressing the key you can start the input again Meaning of the special functions special function 0 End of special functions and back to measuring mode special function 1 Test of the watchdog timer This is a test to check if the pH K21 is still able to control itself When se lecting this function the pH K21 has to act as if it has been newly started To confirm if this is the case the display shows Special fun WDT Test You have to confirm this by pressing the key 4 special function 2 Selection of the measuring precision decimal point digits Here you can determine if the pH value is output with one or two digits after the decimal point Measurement is always carried out with two digits after the decimal point With adjustment at 1 the pH value is rounded
39. ogy i special fun out device contrast aCCU 7 83V POWERSUPPLY 12 0V date 22 05 97 time 02 33 43 load status Input read in routine for special functions see CHAPTER 8 page 27 Adjustment of the output equipment none no output PC EDP output to PC EDP or scale PRINTER output to printer see Adjustment of the output equipment printer or PC page 41 set contrast display current voltage of the accumulator here 7 83 Volt by pressing the key 4 in aCCU setting the instrument is switched off supply voltage here 12 0 Volt Display of month day and year MM DD Y Y Here March 12 97 see Adjustment of date and time page 40 Display hours minutes and second HH MM SS Here 2 43 sec p m see Adjustment of date and time page 40 Loading condition of the pH K21 no POWERSUP no power supply connected 1 minute test short test accumulator one minute unloading discharging discharge unloading discharging of the accumulator charge loading charging of the accumulator life charge Page 14 NWY Technology How to call the control functions Display of the pH value When starting the pH K21 the current measured pH value is indicated By pressing the key the measurement is released and stored Display current number press 1 time The current number is shown for one second press 1 time number indicates the input read in routine for the current number ATTE
40. press 8 times out device Here you have to select to which output device you want to transfer data ATTENTION If you want to change the adjustment for the output device please refer to Adjustment of the output equipment printer or PC page 41 If not press the following key press 1 time return to measuring mode Voltage display Power supply of your hand probe takes place by an accumulator Therefore you have the possibility to ask for the residual voltage of the accumulator This value always indicates the remaining voltage real measuring time press 9 times contrast shows you the brightness of the display press 10 times 7 93 Indicates the voltage of accumulator here 7 93 Volt Press any key to continue key a to switch off the instrument press 1 time return to measuring mode press 11 times POWERSUPPLY 12 0V Display voltage power supply here 12 0 Volt press 1 time return to measuring mode Page 19 NAMS Technology ii Display Input date and time press 12 time press 1 time press 13 times press 1 time Display date DD MM JJ day month year key 4 to adjust date and time return to measuring mode Display time HH MM SS hours minutes second key 4 to adjust date and time return to measuring mode S ATTENTION If you want to change the adjustment of date and time please refer to Adjustment of date and time page 40 If not press
41. r e 5 languages directly selectable German English French Italian and Spanish e Data transfer to computer and or printer with serial interface RS 232 e User specific evaluations are individually sortable and freely programmable e Accumulator operated rechargeable for approx 10 hours of actual measuring time e 12 months guarantee on casing and functioning e Precise pH determination of meat because of a second measurement which means measurement of pH 1 right after slaughtering 45 minutes pm measurement of pH 2 after for example 24 hours e measurement of pH 2 is automatically related to the current number of measurement pH 1 e Measuring range from 0 C to 80 C e Measuring range pH from 2 to 14 e Reproducible measured values e Measuring precision of 0 03 pH e Integrated memory storage for 4000 measurements consisting of 4000 pH 1 4000 x date and time 4000 pH 2 4000 x date and time Page 8 NAMS Technology ii Data transfer to any IBM compatible printer with serial interface PC or Host computer electronic scale with operation from the pH K21 for example Bizerba MCIW Data transfer both simultaneous to measuring or after measuring to the required PC or printer All data can be output sorted and selected Automatic storage of the values measured Output pH value with one or two decimal points Reaction times of approx 2 seconds in operation The glass electrode was developed especially for
42. r 55minutes and 20 seconds Date of measurement pH2 in the format MMDDJJ TT day MM month JJ year This item always has 6 digits In the example 30 06 97 Date of measurement pH2 in the format HHMMSS HH hour MM minute SS second This item always has 6 digits In the example 15hour OOminutes and 20 seconds If a measured value pH1 or pH2 cannot be found the measured value date and time have been set to 0 Page 51 NAMS Technology ii Data transfer Example for a data record to be transmitted ASCII STX 11 1 0 123 4321 596 571 120394 145520 130394 150020 ETX BCC HEX 02 31 31 2C 31 2C 30 2C 31 32 33 2C 34 33 32 31 2C 35 39 36 2C 35 37 31 2C 31 32 30 33 39 34 2C 31 34 35 35 32 30 2C 31 33 30 33 39 34 2C 31 35 30 30 32 30 03 STX 11 1 0 123 4321 596 571 120394 145520 130394 150020 ETX BCC Set up of BCC Block Control Check BCC is an EXCLUSIV ODER XOR connection of all byte of a data record STX and ETX which stand for the beginning and the end of the text are not regarded Example Character BCC BCC 0 BCC BCC 31h 1 BCC BCC 31h 1 BCC BCC XOR 2ch BCC BCC 31h 1 BCC BCC XOR 30h 0 Page 52 NWY Technology Transmission of a record PC lt gt Probe lt STX lt Data lt ETX lt BCC ACK gt reception OK NAK gt otherwise error
43. r the causes mentioned above If the error message is still given please call your service Page 44 NAMS Technology ii Error number 80 90 91 100 101 102 103 104 description Error analogue module cause The measured value cannot be stored clearing Please call your service Remote control no network cause You changed to remote control operation and didn t connect the power supply clearing Connect the power supply If the error message is still given please call your service Remote control not initialised cause You changed to remote control operation and the probe is not calibrated the firmware is not initialised clearing Calibrate the pH K21 see special function 9 page 37 If the error message is still given please call your service Electrode Lifetime passed cause The electrode in the instrument is older than the lifetime en tered please see subfunction 50 Adjustment lifetime of the electrode page 31 clearing Change the electrode Electrode more than 75 of the insertions have been carried out cause More than 75 of the possible insertions have been carried out with the electrode in the instrument This is only a warn ing clearing Please observe that you have a new electrode on stock If so please ignore this message Electrode 100 of the insertions cause There have been carried out more than the adjusted number of measurements
44. sses customer data Protocol R Remote control Remote control mode RETURN S Selecting the current measurement 39 13 25 14 14 13 8 11 22 39 24 31 31 53 28 11 Page 59 NAMS Technology Selection Selection range Selections Serial number Sorting Special functions Status Supply voltage Switch off T Tattoo Tattoo number 17 25 25 13 32 16 27 31 14 14 13 22 Technical data 56 Technical description of data transfer to PC EDP 47 temperature for the measuring medium Total deletion Total measurements Transmission of complete data to PC Turn off Watchdog timer Watchdog timer WDT Test Whole display is blinking 27 13 32 51 12 55 27 46 60
45. ssing these two keys together input is terminated and the original value is not changed In case you did select a point inadver tently this is very important Page 21 NAMS Technology ii CHAPTER 2 Changing the current number No To perform the change mentioned above please follow the steps starting from the measuring mode press as long as number appears number indicates the input routine for the current number press 1 time The cursor blinks under last number of the current number To change the number please refer to CHAPTER 1 page 21 CHAPTER 3 Changing of the marking tattoo number To perform the change mentioned above please follow the steps starting from the measuring mode press as long as mark appears mark indicates the input routine for the mark ing press 1 time The cursor blinks under the last number of the current marking To change the marking please refer to CHAPTER 1 page 21 Page 22 NWY Technology CHAPTER 4 Selection of the display mode Measurement of pH1 pH2 or first pH1 and then pH2 press press 1 time Please choose 1 2 or 3 as long asmeas mode appears Display blinks meas mode pH 1 pHl value is measured With the next measurement the pH1 value is measured and stored If there has already been carried out a measurement with the current num ber the display shows record used The old measured value is over written meas mo
46. trode With this function you fix the control data for the lifetime of an electrode The first input is the number of insertions which can be carried out with the electrode The number is input in 1000 insertions which means that the input 5 is equal to 5000 insertions The display shows 30 here 30000 insertions After pressing the key a for example 180 appears This is the lifetime of the electrode in days To ME the number please refer to CHAPTER 1 page 21 Press and to return Subfunction 65 Receiving addresses or customer data from the PC With this special function and a special software for PC customer specific data can be transferred to the pH K21 For data transfer 1 Connect your PC to the pH K21 2 Start your PC software 3 Select special function 8 subfunction 65 The display shows adresses receive start 4 The pH K21 is now waiting for data from the PC 4 Start data transfer at the PC Page 32 NAMS Technology i Subfunction 68 Printout of addresses customer data This function is only possible if a printer is connected Addresses which were transferred to the pH K21 with special function 65 please see Subfunction 65 Receiving addresses or customer data from the PC page 32 can be printed out with this function Page 33 NAMS Technology ll Subfunction 70 Printout of an error and calibration report This function is only possible if a printer is connected You can print
47. tte erue spes Mie NANA ee aee 39 CHANGING OF THE ELECTRODE eeeeeeee senes seen netten setas sets sets s stesse tenes esas seus 40 ADJUSTMENT OF THE OUTPUT EQUIPMENT PRINTER OR 41 ADJUSTMENT OF DATE AND TIME eere eene eene eene en natns atten setas stessa tensa esos sess setas etes s seen sse se tnaae 42 ERROR TREATMENT IN THE 21 sets setas etes s sten 43 ERROR NUMBERS CAUSES AND CLEARING cccccccsssssececceeecessesececceeseuasssececceeeseaaesececcesseeauesecececesesaunsececccesesaunseceseseeeeaaenes 43 BRRORSBEINKING DISPLAY 46 The left side of the display is 46 Ihe whole display is blinking aee e vae 46 ERRORS WHICH APPRAR IN PRACTICE 47 What happens if calibration is not possible 47 What happens if the current number isn t counted upwards after each measurement 47 What happens if data transfer to printer or PC doesn t function eese eene nnne 47 What happens if the whole display is blinking 46 What happens if the display is inversed light fonts on dark background eese 46 What happens if th
48. ured as follows ESC command letter E L M S X BCC or ESC command letter A length of string string BCC The BCC includes all characters of the data record apart from the BCC itself To calculate the BCC please see Set up of BCC Block Control Check page 50 PC lt gt Probe Command gt lt ACK Command understood and executed or lt NAK Command not understood or lt EOT Command understood but not executed After the ESC command the pH K21 sends all data measured up to now The format of data transferred is described under Data transfer of the pH K21 to a PC page 49 After the ESC M command the pH K21 releases a measurement without storing it and sends the measured value pH 1 to the PC The format of data transferred is described under Data transfer of the pH K21 to a PC page 47 After the ESC command the pH K21 releases a measurement without storing it and sends only the measured value with protocol to the PC The data record then is the following STX Data ETX BCC In this case the data record only consists of the pH value measured right now 100 for example 588 for pH 5 88 Page 56 NAMS Technology Running time of the accumulator continuous operation The accumulator has a running time of approx 8 10 hours without recharging After that time it has to be recharged over the interface hub with the help of the power supply This process takes about 12
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