E KERN 470 Version 1.8 09/2001 Operating Instructions Electronic Precision Balances 1 TECHNICAL DATA...40 2 UNPACKING AND STANDARD EQUIPMENT...40 3 INSTALLATION...41 4 POWER MAINS CONNECTION...41 5 DECLARATION OF CONFORMITY...42 6 SELECTION OF THE MODE SETTING...44 6.1 Mode setting Weighing... 44 6.1.1 Weighing... 44 6.1.2 Taring TARE... 45 6.1.3 Bar graph display when weighing... 45 6.1.4 Net-total-weighings... 45 6.2 Mode parts counting... 46 6.3 Mode percent... 47 6.3.1 Input of the 100%-reference weight by weighing... 47 6.3.2 Input of the reference weight using the keyboard... 49 6.4 Mode weighing and conversion... 49 7 WEIGHING WITH TOLERANCE RANGE (CHECK WEIGHER)...50 7.1 Input of the limiting values by weighing (see point 6.1 Mode weighing )... 50 7.2 Input of the limiting values using the keyboard... 51 7.3 Deletion of the limiting values... 51 8 ACCUMULATION OF DISPLAYED VALUES...52 8.1 Accumulation of all individual weighings... 52 8.2 Net-total weighing... 53 9 ADJUSTING (CALIBRATION)...54 9.1 Introduction... 54 9.2 Adjusting for verification... 55 9.2.1 General... 55 9.2.2 Disable/enable the adjustment function... 55 38 470-BA-defs-0118
10 GENERAL PROGRAMMATIONS...56 11 ACCUMULATOR OPERATION (OPTIONAL)...60 11.1 Technical data:... 60 11.2 Assembling instructions... 60 12 DATA OUTPUT...62 12.1 Description of the serial data output (similar to RS 232)...62 12.2 Setting of the interface... 64 12.3 Additional technical data... 64 13 INTERFACE RS 232 (OPTIONAL, KERN ART.-NO. 470-913)...65 13.1 Interface Description... 65 13.2 Data Output... 65 13.2.1 Data Transmission Formats... 65 13.2.2 Sign... 66 13.2.3 Data... 66 13.2.4 Units... 66 13.2.5 Evaluation Result / Data Type... 67 13.2.6 Data State... 67 13.2.7 Notes... 68 13.3 Data Input... 69 13.3.1 General Notes... 69 13.3.2 Transmission of Commands... 69 13.3.3 Transmission Format for Commands... 70 13.3.4 Command: External Tare... 70 13.3.5 Setting of the Output Control... 70 13.3.6 Display Mode Setting... 71 14 IMPORTANT INFORMATION...72 15 TROUBLE SHOOTING...73 15.1 Error messages... 73 470-BA-defs-0118 39
1 Technical Data Model KERN 470-36 470-38 470-44 470-46 Readout (d) verifiable Readout (d) verified g g 0,01 0,1 0,01 0,1 0,05 0,1 0,1 1 Verification value (e) Weighing range (max) g g 0,1 2000 1 5000 1 10000 1 15000 Minimum load (min) Reproducibility g g 0,5 0,01 5 0,02 5 0,05 5 0,1 Linearity g ±0,02 ±0,04 ±0,1 ±0,2 Minimum weight for counting parts g 0,05 0,1 0,25 0,5 Adjusting weight g 1000 2000 5000 1000 (accuracy class F2) + 5000 Weighing plate steel Ø 170 220 x 180 Power mains connection Mains adapter 230 V, 50/60 Hz Balance 9 V DC Humidity Max. 80 % relative (non evaporating) Ambient temperature 0 C to + 40 C Underfloor weighing Hanging loop below the cover plate as standard 2 Unpacking and standard equipment Unpack the balance carefully. Keep the packing material for an eventual later transport of the balance. The packing contains: Balance Weighing plate Weighing plate support Mains adaptor Adjusting weight Operating instructions 40 470-BA-defs-0118
3 Installation Loosen the transport locking. For that remove the black rubber cap at the top of the casing and turn the lever below to the left side in Weighing pos. See also the relevant labels. Insert rubber cap again Screw on the weighing plate support with the knurled screw. Pay attention to the fitting holen. Insert weighing plate. Place the balance on a horizontal stable base, see point 12 Important informations. Level the balance with the foot screws. The air bubble (in the front of the balance at the left side) must be in the marked circle. Important! For each transport of the balance the transport locking must be in position Transportation pos.. 4 Power mains connection Ensure that the mains adapter will be connect to a wall socket. Do not connect to another mains voltage, unless the type label indicates another voltage. The wall socket must be earthed as per the VDE prescriptions. Checking by an authorised special electric workshop. Only now: Connect adapter cable at the rear side of the balance. Plug the supplied mains adapter into the wall socket. Adjusting the balance, see point 9 Adjusting. 470-BA-defs-0118 41
5 Declaration of conformity Declaration of conformity The non-automatic balances Type: KERN 470-36 KERN 470-38 KERN 470-44 KERN 470-46 No. of the EC type-approval certificate: T2560 Issued by: NMI correspond to the production model described in the EC type-approval certificate and to the requirements of the following EC directives: EC-Directive Version 90/384/ECC Applied harmonised norms, in particular EN 45501 This declaration is only valid with the certificate of conformity by a notified body. If a change is made to the above mentioned appliances without consulting KERN this declaration will become invalid. Date: 27 April 2000 Signature: Gottl. KERN & Sohn GmbH Management Gottl. KERN & Sohn GmbH, Ziegelei 1, D-72336 Balingen-Frommern, Tel. +49-07433/9933-0,Fax +49-07433/9933-149 42 470-BA-defs-0118
Declaration of conformity The non-automatic balances Type: KERN 470-36 KERN 470-38 KERN 470-44 KERN 470-46 correspond to the production model described in the EC type-approval certificate and to the requirements of the following EC directives: EC EMC Directive Version 89/336/ECC Applied harmonised norms, in particular EN 50081-1, EN 50082-1, EN 55022 If a change is made to the above mentioned appliances without consulting KERN this declaration will become invalid. Date: 27 April 2000 Signature: Gottl. KERN & Sohn GmbH Management Gottl. KERN & Sohn GmbH, Ziegelei 1, D-72336 Balingen-Frommern, Tel. +49-07433/9933-0,Fax +49-07433/9933-149 470-BA-defs-0118 43
6 Selection of the mode setting There are four mode settings:: Mode settings Indication Page 6.1 Weighing 1 SEt 1* 37 6.2 Weighing and parts counting 1 SEt 2 39 6.3 Weighing and percent 1 SEt 3 40 6.4 Weighing and conversion 1 Set 4 42 Manufacturer s default. The mode setting is kept even when the balance will be turned off. In each mode setting weighing, pieces and percent presets with tolerance range are possible point 7 Weighing with tolerance range. In each mode setting accumulations of weight values, pieces and percent values are possible, see pint 9 Accumulation of indicated values. 6.1 Mode setting Weighing Setting see point 10 General programmations on mode setting 1 Set 1. 6.1.1 Weighing Turn on the balance with the switch at the bottom of the right side of the casing. All segments and signs will appear in the display in the frame of the self-controlling. Then the indication changes to 0. Now the balance is ready for use. To secure the accuracy we recommend a warming-up time of minimum 15 minutes. Only now (!) place the weighing object on the weighing plate. Take care that the weighing object does not touch anywhere at the casing or at the base. The weight determination is finished when the small ring o (=stability detector) appears in the left upper corner of the display. Read the weighing result. 44 470-BA-defs-0118
The indication of a weight unit, i.e. g can be changed to another unit, e.g. 2kg by repeatedly pressing F. Setting unit see point 10 General programmations : Weighing with tolerance range, see point 7. Weighing with accumulation, see point 8. 6.1.2 Taring TARE Place tare cup on the weighing plate and press TARE. The weighing indication changes now to 0. The weight of the cup is now memorised. Fill weighing object in the cup, read measuring value. By pressing TARE, after the terminated weighing operation 0 appears again in the display. The taring procedure can be repeated several times, for instance to produce a mixture of several components. The limit is reached when the total weighing range has been used. After removal of the tare cup the total weight appears as a negative value with - mark. 6.1.3 Bar graph display when weighing Will be activate with weight unit B is active on the display. This is available by F. See point 6.1.1 Weighing. The bar graph (below the digital display) moves from the left to the right side and mar5ches in the same measure as the balance is being loaded. Is full breadth will be reached at full capacity. This is to display analogously the actual remaining weighing range and to avoid an overloading. 6.1.4 Net-total-weighings Useful when a mixture of several components will be weighed in a tare cup, and when finally the sum weight of all components will be needed for control (Net-total), i.e. without the weight of the tare cup. See point 8 Accumulation of indicated values, point 8.2 Net-total-weighings 470-BA-defs-0118 45
6.2 Mode parts counting Set mode parts counting with F and TARE on 1 Set 2,, see point 10 General programmations Confirm with S. Press F and release it when U SEt appears. Now flashing indication on...pc % Select the required reference number 5 10 30 100 pieces by repeatedly pressing TARE. Important! The higher the reference number, the exacter the parts counting. Place so much parts on the weighing plate as the set reference number requires. Confirm with F, the memorising will need a short time. Now this reference number appears. When the display is flashing an optimisation will be possible. At the same time two triangles appear at the left side. Now double or max. triple approximately the quantity. The following optimisation is running automatically. It is finished when a beep comes out. No confirm required. When the display is still flashing and shows Add, at the right side a new optimi- Sation should be performed by doubling or max. tripling the quantity, same procedure as above. When Sub PC 5, appears remove so much parts from the weighing plate until this display will disappear. Press F when the optimisation should be terminated. Now the balance is ready for counting and will count all parts being on the weighing plate. Indication of the unit weight of one part as well as the total weight in g of all parts on the weighing plate to be counted by repeated pressing of F. Now parts counting by over-writing the reference number. Press F and release it when U SEt appears. Minimum weight for counting parts see table Technical data L - Err Appears when the unit weight of the parts is below the minimum weight as specified. 46 470-BA-defs-0118
Tare cups can also be used when counting parts. Before starting tare it with TARE. Leave the parts counting program by pressing F. Release it Func an then when 1 SEt 2 appears. Further see point 11 General programmations. The last memorised reference number is kept even when the parts counting program will be left. Parts counting with tolerance range, see point 8. Accumulation of numbers of pieces, see point 9. 6.3 Mode percent Any weight can be memorised as a reference weight 100 %. All deviations of this weight will be indicated in %. Example: Reference weight prior to drying 100 g, after drying 80 g Indication either 80 % absolute or after taring 20 % relative. Set mode percent with F and TARE on 1 SET 3 See point 10 General programmations. Confirm with S. Important! The higher the reference weight 100 % the more decimal places. 6.3.1 Input of the 100%-reference weight by weighing. Press F and release it when P SEt appears. Now flashing display of the actually memorised reference weight corresponding to 100 %. Place new 100 % reference weight on the weighing plate. Confirm with F, the memorising will need a short time. Now 100,... % appears. Now the balance displays each deviation from the 100 % reference weight in % absolute. By taring after having memorised the reference weight 100 % the balance will display in % relative. 470-BA-defs-0118 47
Indication of the actual weight value on the weighing plate by pressing F twice. Return to the % display by pressing F. Tare cups/container can also be used for percent determinations. Before starting tare them with TARE. Percent determination with tolerance range see point 7 Weighing with tolerance range. To leave the mode percent press F and release it when Func and then 1 SEt 3 appears. Further see point 10 General programmations. The last memorised 100 % reference weight is kept even when the mode percent will be left. 48 470-BA-defs-0118
6.3.2 Input of the reference weight using the keyboard. Press F and release it when P. SEt Appears, Now flashing display of the actual memorised reference weight corresponding to 100 %. Example: Press TARE, 0 starts to flash. Input 3 By pressing three times TARE, move it with f by one place to the left, indication flashing 30. Input 2 by pressing twice TARE, move it with F by one place to the left, indication flashing 320. Input 1 by pressing TARE and move it with F by One place to the left, indication flashing 3210. Input h By pressing repeatedly TARE and move it with F by one Place to the left, indication flashing 321.0. Input 5 By pressing repeatedly TARE. Do not operate the F-key! Confirm with S the 100 % reference weight of 321.5 g Display 0,0 %. Further see point 6.3.1 6.4 Mode weighing and conversion Serves to multiply the weight in g of a weighing object on the weighing plate by a factor. The following procedures can be performed automatically. Conversions to foreign weight units Conversions to complex units such as density (g/cm³), area weights (g/cm³) or length weight (g/m) Conversions to works-internal arithmetical units, for instance works standards This factor can be as well as greater or smaller than 0. Positive and negative numbers can also be memorised. Set to 1 SEt 4 With F and TARE, see point 10 General programmations. TO SET THE CONVERSION FACTOR SEE POINT 6.3.2 INPUT OF THE REFERENCE WEIGHT USING THE KEYBOARD Input firstly the sign, then the figures before the decimal point, the decimal point, and finally the figures after the decimal point. Delete the conversion factor by new input of a conversion factor of 0, then confirm with S. Display 0, the memory is deleted. 470-BA-defs-0118 49
7 Weighing with tolerance range (Check weigher). This balance can be used as dispensing balance as well as grading balance. The respective lower and upper limiting values can be memorised. This is possible in all four modes: 6.1 WEIGHING 6.2 Weighing and parts counting 6.3 Weighing and percent 6.4 Weighing and conversion For 6.2 up to 6.4 firstly the starting extents have to be set, i.e. the reference number, 100 % reference weight and conversion factor, the limiting values in the sense of point 7.1 Input of the limiting values by weighing. Important! Input always firstly the lower limiting value, only then input the upper limiting value. 7.1 Input of the limiting values by weighing (see point 6.1 Mode weighing ) Press S and release it when L. SEt appears. Now flashing display of either 0 or of the actual memorised lower limiting value. Put the lower (i.e. the smaller) limiting value on the weighing plate. Confirm with F, the memorising will need a short time. Now 0 appears again flashing. Put the upper (i.e. the greater) limiting value on the weighing plate. Confirm with F and wait for the beep. Now both limiting values are memorised. When the succeeding weighings will be within the tolerance range, i.e. between the lower and the upper limiting value, an acoustic sign will optionally come out. The acoustic sign stops when the tolerance range has been left. (More options for weighing with tolerance range see 10 General programmations.) 50 470-BA-defs-0118
Important! In case the balance should be unstable in the range of the limiting points, the vibration filter should be turned less sensitive, see point 10 General programmations. 7.2 Input of the limiting values using the keyboard Press S and release it when L. SEt appears. Now flashing display of either 0 or of the actual memorised lower limiting value. Press TARE, 0 start to flash. Further see point 6.4.2 Input of the reference weight, using the keyboard with example 321,5 g i.e. lower limiting value. After having confirmed the lower limiting value with S 0 will appear flashing, or the memorised upper limiting value. Press TARE, 0 starts to flash. Input the upper limiting value as explained above and confirm with S. Weighing with tolerance range see point 7.1. 7.3 Deletion of the limiting values Press S and release it when L. SEt appears Now flashing display of the actual memorized lower limiting value. Press TARE, 0 Starts to flash. Confirm with S, the lower limiting value is deleted. Now the upper limiting value appears flashing. Press TARE, 0 starts to flash. Confirm with S, the upper limiting value is deleted. The limiting points can also be changed by over-writing. Important: Limiting values have to be deleted in order to return to the weighing mode. 470-BA-defs-0118 51
8 Accumulation of displayed values The sum of all individual weighings during one period can be memorised in a separate store, for example the total daily sum of all weighings during this day. This is possible in all four modes: 6.1 WEIGHING 6.2 Weighing and parts counting 6.3 Weighing and percent 6.4 Weighing and conversion Before starting set always the smallest possible display-unit. Example: In the mode Weighing2 see point 6.1 set g and not kg. 8.1 Accumulation of all individual weighings Carry out weighing A, for example 1000 g. After the light up of the stability detector o (left side above in the display), the indicated value will be transferred to the sum memory by pressing S. The display goes for a moment to the sum weight Σ 1000 g,then to 1000 g. Remove weighing object. Carry out weighing B, for example 500 g. See above. See above. Indication after having pressed S firstly sum weight then 500 g. Remove weighing object. Carry out weighing C, for example 200 g. See above. Indication after having pressed S firstly sum weight then 200 g. Remove weighing object. Σ 1000 g Σ 1700 g After having carried out the last individual weighing the total sum of all weighings A + B + C appears by pressing twice F. For example Σ 1700 g (1000 + 500 + 200 g) Delete with TARE. Return to the mode weighing with F. 52 470-BA-defs-0118
8.2 Net-total weighing Useful when a mixture of several components will be weighed in a tare cup, and when finally the sum weight of all components will be needed for control (Net-total), i.e. without the weight of the tare cup. Place the tare cup (for example 852 g) on the weighing plate. Tare the display with TARE to 0. Weigh in component I, for example 600 g- After termination of the weighing in and the light up of the stability detector (left side above in the display) the indicated value will be transferred to the sum memory by pressing S. o Indication for a moment the sum weight Σ 600 g, then 600 g Tare to 0 with TARE. Weigh in component III, for example 100 g See above. Indication after having pressed S firstly sum weight then 400 g. Tare to 0 with TARE. Σ 1000 g Weigh in component III, for example 100 g See above. Indication after having pressed S firstly sum weight then 100 g. Σ 1100 g After having terminated the weighing in of the individual components to the required mixture the sum weight of all weighings I + II + III appears by pressing twice F, for example Σ 1100 g (600 + 400 + 100 g) This is an important end control for the dispensing. The weight of the tare cup (852 g in the example is not included in the sum weight of the components I + II + III. Delete with TARE. Return to the mode weighing with F. 470-BA-defs-0118 53
9 Adjusting (Calibration) 9.1 Introduction The accuracy of the balance can be checked and adjusted at any time with the enclosed adjusting weight. Take care of stable environmental conditions, see point 12 Important informations. A warming up time of approx. 30 minutes is necessary. Press and hold F and only release it when CAL appears. Press and hold T. the immediately touch F for a moment, then also release T. Display Unit 1 (Unit 2) Touch F for a moment. Display on 0 flashing. Don t touch the weighing plate. Briefly after that appears on F5 in the display. Place the adjusting weight carefully on the centre of the weighing plate. Display flashing on F.5 then a moment later the weight value of the adjusting weight will be indicated. Remove the adjusting weight, the adjusting is terminated. In case of a adjusting error or in order to interrupt the adjusting process get out with S. Keep the calibration weight near the balance for daily checking is accuracy. Important! Handle carefully the adjusting weight. Protect it against damage and dirt. Arrange for periodic checking. Keep it near the balance (danger of confusion). 54 470-BA-defs-0118
9.2 Adjusting for verification 9.2.1 General Before the verification procedure, the balance must be adjusted where it is to be used. The commutation of the readout, to 01 g for the verifiable balances 470-38 and 470-44. The balances have the following standard settings: KERN 470-38 470-44 Readout (d) 0,01 g 0,05 g The readout has to be modified for the verification as follows: Press F and release it when Func appears. Then 1 Set. 1 appears. By pressing repeatedly F start the function 72.d.A 1 of. Model 470-38: Press TARE and release it when 72.d.A 4 appears (Division 0,1 g). 74.d.b 4 Model 470-44: Press TARE and release it when 72.d.A 2 appears (Division 0,1 g) 74-d.b 2 Confirm with S and leave the programming mode. 9.2.2 Disable/enable the adjustment function Remark: An adjustment is only possible if this has not been disabled by the adjustment switch. Switch up: Switch down: Adjustment function is possible. Adjustment function is disabled. Jafter the succesful adjustment where the balance is being used, adjustment must be disabled with this switch position. 470-BA-defs-0118 55
10 General programmations The manufacturer has set a certain default configuration. This marked with *. It can be changed as follows: Press F for approx. 4 seconds, release when Func Appears. Upon release 1 SEt 1 appears. The various functions will be called up by pressing F repeatedly. The individual setting within the various functions will be called up by pressing TARE repeatedly. The following adaptations are possible: The following adaptations are possible: F T Weighing 1 Set. 1* See point 6.1 Weighing and parts 2 See point 6.2 counting Weighing in percent 3 See point 6.3 Weighing and 4 See point 6.4 conversion 2 SE1. 4* Use always this setting 1,2,3 Not documented Follow at zero adjust 3A.O 56 470-BA-defs-0118
F T Settings 21.Co. up to 25.G Are relevant for weighings with tolerance range only Sound signal 21. Co. 1 Sounds immediately even when the stability detector 2 Sounds only when the stability detector is indicated. Sound signal 22. L1. 0 Sounds only outside the zero point range. 1 Sounds in all ranges 23 P.u. 2 Use always this setting. Options of the sound signal 1,3,4 Not documented. 24 Bu. 0* No sound Additional representation in the display 1 Not documented 2 Sounds when the measuring value is within the tolerance range. 3,4,5 Not documented. 6 Sounds when the measuring value is outside the tolerance range. 25 L.G. 1* Representation of 3 additions below, above and within the tolerance range. 2 Continuos representation of the charged weight regarding the tolerance range. 470-BA-defs-0118 57
F T Zero adjust 3 A.0 Automatic shutoff at 4 A.S. accumulator operation Vibrations filtre (integration time) 0 1* 0 1 5 RE. 0 1 2 3* 4 5 Stability detector 6 S.d. 1 2* 3 4 Weight unit for group A Dip steps for group A (primary unit) Weight unit for group B (for simple weighing only) Digit steps for group B 71. u.a 72. d.a. 73. u.b. 1 2* 3 4 5 6 1 2 3 4 5 0 1 2 3 4 5 6 74. d.b. 1 2 3 4 5 OFF Automatic zero adjust. Off On Sensitive and quick. Unsensitive but slow. Unsensitive Sensitive Not documented g kg vt Not documented Not documented 0,01 0,02 0,05 0,1 0,2 No second weight unit Not documented g kg ct Not documented Notdokumented 0,01 0,02 0,05 0,1 0,2 58 470-BA-defs-0118
F T Output format at the interface Output condition at the interface Only when the serial interface is being used, see point 13 Data output 8 if. 81 O.C. Baud rate 82 b.l. Parity (can be set at 7 place output format only) 83 PR. Ø* 1 2 3 0* 1 2 3 4 5 6 7 1 2 3 0 1 2 Interface inactive 6 place data format (old format). 7 place data format Data format for verified balances ( / will be fit before the last decimal Example: + 0123,45/5 Sp g Sp S CR LF No output Continuous serial output Continuous serial output at stabilised indication Output after having pressed S. Automatic output when loaded New output only after having removed the weight and loaded the balance again. One output when stabilised One output when stabilised One output after having pressed S at stable indication 1200 baud 2400 baud 4800 baud No parity bit Odd parity Even parity The manufacturers default is marked with *. Confirm and leave the mode General programmations with S. Important! Confirm with S only. When you confirmed by error with F press immediately S again. 470-BA-defs-0118 59
11 Accumulator operation (optional) 11.1 Technical data: LOADING TIME: Approx. 8 hours when the balance is turned off. Operating time: Approx. 5 hours at continuous operation. Automatic shutoff: An automatic shutoff can be programmed (see point 10 General programmations ). When it has been programmed the indication will be shut off 3 minutes after the last utilisation of the balance. Sleep-control lamp (at the bottom left in the user field): Lights up when an automatic shutoff took place. Load control lamp (at the bottom left in the user field): Lights up when the battery voltage is falling below the minimum. 11.2 Assembling instructions Turn off the balance and disconnect it from the mains. Remove the weighing plate and release the 2 screws in the frame below the plate (see illustration). Lift carefully the upper part of the casing upwards and lay it on the left side. Important! The upper part of the casing is connected with the lower part by a cable. Take care when you lay it down. 60 470-BA-defs-0118
Release the fastening screw in the lower part of the casing and insert the accu-set as per the drawing. Slide the U-shaped sector of the accu-holder below the lock. Re-insert and tighten the fastening screw. Do the same with the fastening screw for the lock. Slide the plug of the connection cable on the plug CN2 of the main print. Put on the upper part of the casing. Take care that no cable will be squeezed. Tighten the both screws in the frame and put on the weighing plate. When the balance must automatically shut off after a certain time (sleep function) point 4 AS in the programmation, see point 10 General programmations has to be set accordingly. 470-BA-defs-0118 61
12 Data output The balance is supplied as standard with an interface similar to RS 232 Important! A standard bidirectional RS 232 C interface with comfortable remount control is available against extra charge. 12.1 Description of the serial data output (similar to RS 232) The data output is placed at the rear side of the balance. It is a 8-pole standard socket. Pin description see following illustration: The transfer of the measuring data from the balance is made via pin 4 and 5 only. Pin 4 - Pin 5 - Transmit data Signal ground 62 470-BA-defs-0118
During each data output a chain of 14 or 15 signs is being transferred. The following formula is valid: + or - Premise (P) 6 or 7 digit readout of the indication and decimal point (= 6 or 7 signs) (D) two symbols for the unit two status symbols one carriage return One line feed (U) (S) (CR) (LF) P D D D D D D D U U S S CR LF with P: Polarity 1 sign (+ or -) D: Data 7 or 8 signs U: Unit 2 signs (sp) g or kg (example) S: Status 2 signs (sp) S... Data stabilised. (sp) U... Data not stabilised. E... Data error. CR: LF: Carriage return Line feed Example: Indication: Output: Indication: 123,4 g + 0 0 1 2 3. 4 sp G sp S CR LF - 65.4321 kg IMPORTANT! The sign sp is representing in these examples a space pace (ASCII#40,oktal), CR is a carriage return (ASCII#15) and LF a line feed (ASCII#12) The following list contains the used ASCII-codes: 470-BA-defs-0118 63
Octal Decimal Hexadecimal Sign 12 10 OA LF Line feed 15 13 OD CR Carriage return 40 32 20 sp space pace 53 43 2B + 55 45 2D - 56 46 2E. 60 48 30 0 61 49 31 1 62 50 32 2 63 51 33 3 64 52 34 4 65 53 35 5 66 54 36 6 67 55 37 7 70 56 38 8 71 57 39 9 12.2 Setting of the interface The output has to be adapted for special requirements (see point 10 General programmations). The output format, the output conditions, the Baud rate and the parity can be set. 12.3 Additional technical data Transfer format: serial data transfer 8-bit word length (standard-ascii-format) 1 Start-Bit 2 Stop-Bits Parity 0 or 1 (see point 10 General programmations ) Baud rate: 1200 baud/2400 baud/4800 baud can be set. (see point 10 General programmations ) Signal level: TTL 64 470-BA-defs-0118
13 Interface RS 232 (optional, KERN Art.-No. 470-913) 13.1 Interface Description By selecting a certain operating mode the output format, the output control, the transmission speed and the parity bit can be set. The various options are described in chapter 10 General Programmations. 13.2 Data Output 13.2.1 Data Transmission Formats By selecting the corresponding function at your KERN 470 balance one of the two following data formats can be set: 1. 6-digit data format Consisting of 14 words including the final signal; CR=0DH, LF=0AH (CR=return travel / LF=line feed) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 P1 D1 D2 D3 D4 D5 D6 D7 U1 U2 S1 S2 CR LF 2. 7-digit data format 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 P1 D1 D2 D3 D4 D5 D6 D7 D8 U1 U2 S1 S2 CR LF Note: The 7-digit format is identical with the 6-digit format except for the additional signal D8. 470-BA-defs-0118 65
13.2.2 Sign P 1 = 1 word P 1 Code Meaning + 2 B H data is 0 or positive - 2 D H data is negative sp 20 H data is 0 or positive 13.2.3 Data D 1 to D 7 D 1 to D 8 7 words with 6-digit format 8 words with 7-digit format D * Code Meaning 0-9 30 H 39 H data 0 to 9 (max. 6 signals in 6-digit format). (point) 2 EH decimal point, position not fixed Sp 20 H blank, leading zero suppressed 13.2.4 Units U 1, U 2 = 2 words as ASCII-codes U1 U2 Meaning Symbol U 1 U 2 Meaning Symbol M G Milligram mg sp G Gram g K G Kilogram kg sp T Ton t P C Quantity pcs sp % Percent % sp # Conversion (#) C T Carat ct M 0 Momme mom 0 T Fine ounce ozt L B Pound lb G R Grain gr D W Pennyweight dwt G F Pond gf T L Tael tl sp N Newton N K F Kilopond kgf sp D Denier D 66 470-BA-defs-0118
13.2.5 Evaluation Result / Data Type S 1 = 1 word S 1 Code Meaning T 54 H Weight sum U 55 H Piece weight SP 20 H No evaluation 1 31 H 2 32 H 3 33 H 4 34 H 5 35 H Not documented With weighing with tolerance range: L 4 CH Weight value below tolerance range G 47 H Weight value within tolerance range Evaluaion result defined at two points: Low / high H 48 dh Weight value above tolerance range 13.2.6 Data State S 2 = 1 word S 2 Code Meaning S 53 H Data stabilized * U 55 H Data not stabilized (changing) * E 45 H Data error, all data except for S 2 not reliable. Balance indicates error (o-err, u-err). sp 20 H No specified state * S and U have no meaning, if values like weight sum or piece weight are transmitted, that are independent from the state of the weight value determination. 470-BA-defs-0118 67
13.2.7 Notes a) Selection of the 6-digit data format: In case that the input data should be of the 7-digiti type, only the highest six digits will be transmitted the lowest digit will get cut off. Example: 123.4567 G 123.456 G b) If the input data was shorter than 6 digits, the leading zero will be cut off, so that the remaining data correspond with the original data. Example: 00123.45 G 123.45 G c) With 7-digit data without decimal point where the lowest digit cannot be cut off, the data transmission will be marked as an error. Example: 1234567 G 123456 G E 68 470-BA-defs-0118
13.3 Data Input 13.3.1 General Notes Via the interface unit the balance can be handled by the transmission of commands. These commands are: 1) - external tare 2) - output control 3) - setting of the operating mode 13.3.2 Transmission of Commands a) Transmitting the command from an external device to the balance: The chronological coordination with data that are being transmitted by the balance is not necessary during the transmission of commands due to the system s full duplex operation mode. b) If the command was correctly received the balance sends a confirmation (ACK, Code 06H). With incomplete transmissions the balance sends a nonconfirmation (NAK, Code 15 H). c) With the balance operating at normal display mode the confirmation (ACK) / non-confirmation (NAK) is sent 1 sec. after the transmission of the command. d) With the balance operating at other modes (e.g. setting of the specific weight / the reference points for the evaluation / functional parameters or verification) the confirmation (ACK) / non-confirmation (NAK) is sent as soon as the balance gets back to the normal display mode. 470-BA-defs-0118 69
13.3.3 Transmission Format for Commands Each command consists of 4 words including the final signs CR = 0D H; LF = 0AH 1 2 3 4 C 1 C 2 C R L F 13.3.4 Command: External Tare C 1 C 2 Code Meaning T Sp 54 H 20 H Tare-Command 13.3.5 Setting of the Output Control C 1 C 2 Code Meaning 0 0 4 F H 30 H No output (accessible for command transmission) 0 1 4 F H 31 H Ongoing output 0 2 4 F H 32 H Ongoing output at stable display (no output at unstable display) 0 3 4 F H 33 H Output if confirmed by print-key S 0 4 4 F H 34 H Automatic output 0 5 4 F H 35 H One output at stable display (no output at unstable display) 0 6 4 F H 36 H One output at stable display (ongoing output at unstable display) 0 7 4 F H 37 H One output at stable display after confirmation via print-key. 0 8 4 F H 38 H One output respectively 0 9 4 F H 39 H One output after stabilization of display Notes: a) The commands 007 07 have the same effect for the output control as the settings of the balance s operating mode. See chapter 10 General Programmations. b) The commands 08 and 09 are only available via the transmission of commands. c) After the execution of a command (009 09) the therewith set state remains valid until the next command is transmitted. After the device was switched off the initial output control corresponding to the balance s operating mode settings will be valid once again. 70 470-BA-defs-0118
13.3.6 Display Mode Setting C 1 C 2 Code Operating Modes Weighing Counting Percentage Conversion M 1 4 D H 31 H weight weight weight Weight M 2 4 D H 32 H (error) piece percent Multiple M 3 4 D H 33 H sum * sum * sum * sum * M 4 4 D H 34 H (error) specific weight (error) (error) Note: Should the set operating mode and the effect of the transmitted comand not fit together, the command will be interpreted as an error and the balance sends Code 15 H, non-confirmation. 470-BA-defs-0118 71
14 Important information This precision balance should be used by skilled staff. This electronic balance is a precision instrument. Avoid disturbing environmental conditions such as air current, vibrations, strong electrical and magnetically fields and rapid change of ambient temperature. When necessary readjust the balance upon temperature adaptation. Avoid high humidity, vapours and dust because the balance is not hermetically closed. The balance should not be directly touched by any liquid, it could enter into the measuring cell. Therefore please wipe the unit with a dry or damp cloth. Do not use solvents, because varnished or plastic parts could be damaged. A short warming up time of some minutes after having switched on the balance will stabilise the measuring values. Place the object carefully on the weighing plate. Avoid any constant load on the weighing plate beyond of the use. Avoid by all means shocks and extreme impairments. Remove immediately spilled substances. When the program cycle is disturbed, turn off the balance and then turn on it again. Start again the weighing procedure. Do not use the balance in rooms where is a danger of explosion-proof. The balance should be checked every day by means of the supplied check weight. Warranty expires when opening the balance. 72 470-BA-defs-0118
15 TROUBLE SHOOTING Trouble Possible causes No indication - Balance is not turned on - Mains connection does not function (cable not connected, cable defective). - Mains supply break down. Weight indication is changing permanently Weighing result is obviously false - Air movements. - Vibrations of the table or the floor - The pan is in contact with an alien element. - Balance has not been tared. - No adjusting has been done. - Temperature deviations. 15.1 Error messages O-Err b-err 1-Err 2-Err 11-Err The balance has been overloaded. Electronic error, caused by electrostatic fields. Check the environment. When necessary change the installation place. Wrong adjusting weight (too light). Wrong adjusting weight (to heavy). Transport lock not released, see point 3 Installation. Weighing mechanism defective. Please contact the manufacturer. When other error messages appear turn off the balance and on again. When the error message still appears please contact the manufacturer. 470-BA-defs-0118 73