KERN & Sohn GmbH Ziegelei 1 D-72336 Balingen E-Mail: info@kern-sohn.com Phone: +49-[0]7433- 9933-0 Fax: +49-[0]7433-9933-149 Internet: www.kern-sohn.com Operating instructions Analytical and precision balances KERN ALT_B-PLT_A-PLT_F Version 3.
GB KERN ALT_B-PLT_A-PLT_F Version 3.3 08/2013 Operating instructions Electronic analytical and precision balances Contents 1 Technical data ................................................................................................ 4 2 Appliance overview ....................................................................................... 9 2.1 2.1.1 2.2 2.2.1 2.3 Operating side ....................................................................................................................
11 Setup menu .................................................................................................. 35 11.1 11.2 11.3 11.4 11.5 11.6 11.7 11.8 11.9 11.10 11.11 11.12 11.13 Weighing Units ....................................................................................................................... 40 RS232 ....................................................................................................................................... 41 Baud rate ...............................
1 Technical data KERN Weighing range (max) Readability (d) Reproducibility Linearity Stabilization time (typical) Minimum unit weight at piece counting ALT 160-4B ALT 250-4B ALT 220-5DA ALT 310-4B 160 g 250 g 60 g; 220 g 310 g 0.1 mg 0.1 mg 0.00001 g; 0.0001 g 0.1 mg 0.1 mg 0.1 mg 0.0001 g 0.2 mg ± 0.3 mg ± 0.3 mg 0.0003 g ± 0.3 mg 4s 4s 4s 4s > 0.5 mg > 0.5 mg > 0.
KERN ALT 160-4BM ALT 250-4BM Weighing range (max) 160 g 250 g Readability (d) 0.1 mg 0.1 mg Reproducibility 0.1 mg 0.1 mg ± 0.3 mg ± 0.3 mg 1 mg 1 mg I I 10 mg 10 mg 4s 4s > 0.5 mg > 0.
KERN PLT 720-3A PLT 1200-3A PLT 6200-2A Weighing range (max) 720 g 1200 g 6200 g Readability (d) 1 mg 1 mg 10 mg Reproducibility 1 mg 1 mg 10 mg ± 2 mg ± 2 mg ± 30 mg 2s 2s 2s Minimum unit weight at piece counting > 5 mg > 5 mg > 50 mg Warm-up time 4 hours 8 hours 4 hours Linearity Stabilization time (typical) Adjustment weight internal Reference quantities at piece counting 10, 25, 50, 100, freely selectable Weighing Units ct, dwt, g, gn, lb, mo, oz, ozt, tl (HK), tl (Si
KERN PLT 420-3F PLT 4200-2F Weighing range (max) 420 g 4200 g Readability (d) 1 mg 10 mg Reproducibility 1 mg 10 mg ± 4 mg ± 40 mg 2s 2s > 5 mg > 50 mg Linearity Stabilization time (typical) Minimum unit weight at piece counting Warm-up time 4 hours Adjustment weight internal Reference quantities at piece counting Weighing Units Input Voltage 10, 25, 50, 100, freely selectable ct, g, gn, lb, mo, oz, ozt, tl (HK), tl (Singap.
KERN PLT 720-3AM PLT 6200-2AM Weighing range (max) 720 g 6200 g Readability (d) 1 mg 10 mg Reproducibility 1 mg 10 mg Linearity 2 mg 30 mg Verification value (e) 0,01 g 0,1 g II II 20 mg 50 mg 2s 2s > 5 mg > 50 mg Verification class Minimum load (Min) Stabilization time (typical) Minimum unit weight at piece counting Warm-up time 4 hours Adjustment weight internal Reference quantities at piece counting 10, 25, 50, 100, freely selectable Weighing Units Input Voltage ct, g 22
2 2.
Models PLT, d = 10 mg 10 Windshield Weighing pan Display Keyboard Levelling screw Bubble level Cover windshield ALT_B-PLT_A-PLT_F-BA-e-1333
2.1.1 Back and bottom side 1. Weighing pan 2. RS232C-interface 3. Footscrews 4. Mains adapter connection 5. Casing screws (in models with four feet first screw out both rear feet) 6.
2.
2.2.
2.3 Overview of display Display PC 1 Capacity display 2 Stability display 3 Zero indicator 4 Numerical display/menu 5 Unit 6 Current time 7 Current date Description see chap. Stability display Zero indicator + Chap. 10.3 + Chap. 10.2 Balance is in percent determination mode + Chap. 12.5 Balance is in parts counting mode + Chap. 12.
Operator guidance: In a selected application you are guided step-by-step through that application. Selectable languages (D, GB, F, IT. ESP, P; see chap. 11.11).
3 Basic instructions 3.1 Proper use The balance you purchased is intended to determine the weighing value of material to be weighed. It is intended to be used as a “non-automatic balcance”, i.e. the material to be weighed is manually and carefully placed in the centre of the weighing pan.. As soon as a stable weighing value is reached the weighing value can be read. 3.2 Improper Use Do not use balance for dynamic weighings.
4 4.1 Basic Safety Precautions Pay attention to the instructions in the Operation Manual Carefully read this operation manual before setup and commissioning, even if you are already familiar with KERN balances. All language versions contain a non-binding translation. The original German is binding. 4.2 Personnel training The appliance may only be operated and maintained by trained personnel. 5 5.
ALT_B-PLT_A-PLT_F-BA-e-1333
6 6.1 Unpacking, Setup and Commissioning Installation Site, Location of Use The balances are designed in a way that reliable weighing results are achieved in common conditions of use. You will work accurately and fast, if you select the right location for your balance.
6.2 Unpacking, Scope of delivery Remove device and accessories carefully from packaging, remove packaging material and place device at the planned work place. Verify that there has been no damage and that all packing items are present. Scope of delivery / serial accessories: Balance, see chap. 2 Mains adapter Protective cover Operating instructions Transport Securing 6.
Install weighing pan as per illustration Models ALT Models PLT, d = 1 mg Models PLT, d = 10 mg ALT_B-PLT_A-PLT_F-BA-e-1333 21
Levelling balance Level balance with foot screws until the air bubble of the water balance is in the prescribed circle. Check levelling regularly. 6.4 Connect and switch-on power supply Before connecting the mains adapter check if the printed voltage value is the same as the local supply voltage. Only use KERN original mains adapter. Using other makes requires consent by KERN. Supply power to balance via mains adapter.
7 Adjustment (all models excepted PLT-M) As the acceleration value due to gravity is not the same at every location on earth, each balance must be coordinated - in compliance with the underlying physical weighing principle - to the existing acceleration due to gravity at its place of location (only if the balance has not already been adjusted to the location in the factory).
Setting adjustment mode: In weighing mode press the MENU button and keep it pressed until the acoustic signal gets mute. The setup menu is displayed. Use the navigation buttons to select the menu item „Adjustment mode“. Acknowledge using PRINT button, the current setting is displayed. Use the navigation buttons to select the desired setting. Display Description Procedure see chap. Internal adjustm. Adjustment with internal adjustment weight Chap. 7.1 External adjustm.
7.1 Adjustment with internal weight after pressing the CAL button Condition: Menu setting „Internal adjustm.“, see chap. 7 In weighing mode press the CAL button, adjustment will take place automatically. After successful adjustment the balance automatically returns to weighing mode. In case of an adjustment error (e.g. objects on the weighing pan) the display will show an error message „CAL bUt“, repeat adjustment using the CAL button. 7.
7.3 Adjustment with external adjustment weight Condition: Menu setting „External adjustm.“, see chap. 7 At the models with internal adjustment weight the adjustment with external weight is not recommended. Information about test weights you will find in the internet under http://www.kern-sohn.com Ensure that there are no objects on the weighing pan. In weighing mode press the CAL button. Wait until the weighed value for the required adjustment weight appears flashing.
7.4 Overwrite internal adjustment weight Overwriting is restricted to specialist staff possessing well acquainted with the workings of weighing scales. Information about test weights you will find in the internet under http://www.kern-sohn.com Call up menu item „Techn. adjustment“, see chap. 7. To confirm press the PRINT button and keep it pressed until the acoustic signal gets mute. Press the MENU button and keep it pressed until the acoustic signal gets mute.
8 Adjustment of models PLT-M As the acceleration value due to gravity is not the same at every location on earth, each balance must be coordinated - in compliance with the underlying physical weighing principle - to the existing acceleration due to gravity at its place of location (only if the balance has not already been adjusted to the location in the factory).
8.1 Automatic adjustment with internal weight The automatic adjustment with internal weight is started automatically, if the balance after the weighing balance was disconnected from the mains after pressing ON/OFF in stand-by mode after a temperature change of 1.5 °C with non loaded weighing pan / zero display after a time interval of 20 min with non loaded weighing pan / zero display The automatic adjustment function is always enabled.
9 Verification General introduction: According to EU directive 90/384/EEC balances must be officially verified if they are used as follows (legally controlled area): a) For commercial transactions if the price of goods is determined by weighing. b) For the production of medicines in pharmacies as well as for analyses in the medical and pharmaceutical laboratory. c) For official purpose. d) For manufacturing final packages. In cases of doubt, please contact your local trade in standard.
10 Basic Operation 10.1 Switch on off balance Start-up: In stand-by mode (see chap. 6.4) press ON/OFF button. As soon as the weight display appears, the balance is ready for weighing. Switching off: Press ON/OFF. The balance changes into standby mode, that means that the balance is now in state ready-for-operation.. To switch-off the balance completely, separate balance from power supply. 10.2 Zeroing Unload the balance Press the TARE key. The zero display and the indicator [-0-] will appear.
10.3 Simple weighing In order to obtain exact weighing results, your balance must have reached the operating temperature (see warming up time chap. 1). Wait for zero display, reset to zero using TARE. Place goods to be weighed on balance. Wait until the stability display appears []. Read weighing result. When an optional printer is connected, the weighing value can be edited. Printout examples (KERN YKB-01N): 27-08-11 10:41:17 Current date/time Weight: 50.5773 g Measuring Value 10.
10.5 Weighing with tare 10.5.1 Determination of the tare weight by weighing The dead weight of any weighing container may be tared away by pressing a button, so that the following weighing procedures show the net weight of the goods to be weighed. Put weighing container on the weighing pan. Wait until stability display [] appears and then press the TARE-button; „Tare“ is displayed. After standstill control the zero display appears. The weight of the container is now internally saved.
10.6 Underfloor weighing Objects unsuitable for placing on the weighing scale due to size or shape may be weighed with the help of the flush-mounted platform. Proceed as follows: Switch off the balance. Open closing cover (1) at the balance bottom. Suspend hook for underfloor weighing carefully and completely. Place weighing balance over an opening. Attach load to hook and carry out weighing procedure.
11 Setup menu In the setup menu, the balance settings can be modified. This way, the balance can be adjusted to individual weighing requirements. Navigation in the menu: Access to menu In weighing mode press the MENU button and keep it pressed until the acoustic signal gets mute. The setup menu is displayed. 2 sec. How to select menu items Use the navigation buttons to select the individual menu items one by one. The cursor (►) displays the current setting.
Menu overview (all models excepted PLT-M) Menu item Weight units (see chap. 11.1) Serial output (see chap. 11.2) Baud rate (see chap. 11.3) Auto zero Automatic zero point correction (see chap. 11.
Contrast adjustment (see chap. 11.7) Backlight (see chap. 11.8) 1-15 on Background illumination on off Background illumination off Auto Timer OFF Automatic switch-off function in stand-by mode (see chap. 11.9) Time and date (see chap. 11.10 Language (see chap. 11.11) Calibration mode (see chap. 11.12) Setting the contrast of the display Disable Backlighting automatically switched off 3 seconds after achieving stable weighing value.
Menu overview models PLT-M: Menu item Units (see chap. 11.1) RS 232 (see chap.11.2) Baud rate (see chap. 11.3) Auto zero Automatic zero point correction (see chap. 11.4) Filter (see chap. 11.5) Stability (see chapter 9.6).
Display contrast (see chap.11.7) Background illumination of the display (see chap. 11.8) 1-15 on Background illumination on off Background illumination off Auto AUTO-OFF Automatic switch-off function in stand-by mode (see chap. 11.9) Time and date (see chap 11.10) Language (see chap. 11.11) Adjustment mode (see chap. 11.12) Select contrast Disabled Background illumination automatically switched off 3 seconds after achieving stable weighing value.
11.1 Weighing Units According to the requirements the balance can be switched over into different units. Selected weighing unit will be retained even after disconnection from the mains. In weighing mode press the MENU button and keep it pressed until the acoustic signal gets mute. The setup menu is displayed. Use the navigation buttons to select the menu item „Weight units“. Acknowledge using PRINT button, the current setting is displayed.
11.2 RS232 In weighing mode press the MENU button and keep it pressed until the acoustic signal gets mute. The setup menu is displayed. Use the navigation buttons to select the menu item „Serial output“. Acknowledge using PRINT button, the current setting is displayed. Use the navigation buttons to select the desired setting.
11.3 Baud rate In weighing mode press the MENU button and keep it pressed until the acoustic signal gets mute. The setup menu is displayed. Use the navigation buttons to select the menu item „Baud rate“. Acknowledge using PRINT button, the current setting is displayed. Use the navigation buttons to select the desired setting. Selectable 1200, 2400, 4800, 9600 baud. Take over selection using the PRINT button. Weighing balance returns to menu.
11.4 Auto Zero Under this menu item the automatic zero point correction can be switched on or off. In switched-on-state the zero point is automatically corrected at drift or when dirty. Note: In the event that small quantities are removed or added to the material to be weighed, incorrect weighing results can be displayed due to the “stability compensation“. (e.g. slow flow of liquids from a container placed on the balance, evaporating processes).
11.5 Filter This menu item allows the balance to be set according to specific ambient conditions and measuring purposes. In weighing mode press the MENU button and keep it pressed until the acoustic signal gets mute. The setup menu is displayed. Use the navigation buttons to select the menu item „Filter“. Acknowledge using PRINT button, the current setting is displayed. Use the navigation buttons to select the desired setting.
11.6 Stability In weighing mode press the MENU button and keep it pressed until the acoustic signal gets mute. The setup menu is displayed. Use the navigation buttons to select the menu item „Stability“. Acknowledge using PRINT button, the current setting is displayed. Use the navigation buttons to select the desired setting.
11.7 Setting the contrast of the display To set the contrast of the display you can choose between 15 values. In weighing mode press the MENU button and keep it pressed until the acoustic signal gets mute. The setup menu is displayed. Use the navigation buttons to select the menu item „Contrast adjustment“. Acknowledge using PRINT button, the current setting is displayed. Use the navigation buttons to select the desired setting.
11.8 Display background illumination In weighing mode press the MENU button and keep it pressed until the acoustic signal gets mute. The setup menu is displayed. Use the navigation buttons to select the menu item „Backlight“. Acknowledge using PRINT button, the current setting is displayed. Use the navigation buttons to select the desired setting. Display Auto Description Backlighting automatically switched off 3 seconds after achieving stable weighing value.
11.9 Automatic switch-off function „AUTO OFF“ In weighing mode press the MENU button and keep it pressed until the acoustic signal gets mute. The setup menu is displayed. Use the navigation buttons to select the menu item „Timer off“. Acknowledge using PRINT button, the current setting is displayed. Use the navigation buttons to select the desired setting.
11.10 Setting date and time In weighing mode press the MENU button and keep it pressed until the acoustic signal gets mute. The setup menu is displayed. Use the navigation buttons to select the menu item „Time and date“. Acknowledge using PRINT button, the current setting is displayed. Use navigation buttons to select the required format. DD-MM: day / month MM-DD: month / day Acknowledge the format with the PRINT button and set date and time as follows. The active digit e.g.
11.11 Language operator guide In weighing mode press the MENU button and keep it pressed until the acoustic signal gets mute. The setup menu is displayed. Use the navigation buttons to select the menu item „Language“. Acknowledge using PRINT button, the current setting is displayed. Use the navigation buttons to select the desired setting. Language Deutsch Français Español Português English Italiano Take over selection using the PRINT button. Weighing balance returns to menu.
11.12 Adjustment mode In weighing mode press the MENU button and keep it pressed until the acoustic signal gets mute. The setup menu is displayed. Use the navigation buttons to select the menu item „Calibration mode“. Acknowledge using PRINT button, the current setting is displayed. Use the navigation buttons to select the desired setting. ! In models PLT-M only automatic adjustment is available. Display Description Procedure see chap. Internal adjustm.
11.13Adjustment log This function helps to print out a record of the last adjustment. Make sure that the communication parameter of balance and printer are the same. Communication parameters, see chap. 9.2 and 11.3 In weighing mode press the MENU button and keep it pressed until the acoustic signal gets mute. The setup menu is displayed. Use the navigation buttons to select the menu item „Calibration info“.
12 Main Menu Navigation in the menu: Access to menu In weighing mode press MENU button. The master menu will be displayed. How to select menu items Use the navigation buttons to select the individual menu items one by one. The cursor (►) displays the current setting. Change settings Acknowledge selected menu item using PRINT button, the current setting is displayed. Each time the navigation buttons are pressed the next setting will be displayed.
12.1 Parts counting Before the balance can count parts, it must know the average part weight (i.e. reference). Proceed by putting on a certain number of the parts to be counted. The balance determines the total weight and divides it by the number of parts, the socalled reference quantity. Counting is then carried out on the basis of the calculated average piece weight. As a rule: The higher the reference quantity the higher the counting exactness. 12.1.
If necessary place a weighing container, confirm the set reference piece number by pressing the PRINT button. Place as many pieces to add-up as required by the set reference piece number. Acknowledge using PRINT button and wait for stability display. As soon as the weighing result is stable, the determined average piece weight will be taken over as reference weight. The currently placed weight „W“, the reference weight „MPW“ and the piece number „PCS“ are displayed. Remove reference weight.
If it was impossible to determine a reference due to instable goods to be weighed or an insufficient reference weight, the following display will appear during reference calculation. Smallest counting weight not achieved Increase the counted weight or select a balance with high resolution or If in the display “Add pieces…..“ appears, the balance asks for a reference optimisation, as the placed number of pieces was not sufficient for a correct reference calculation.
Carry out parts counting After having calculated the reference, place the pieces which will be counted. The currently placed weight „G“, the reference weight „AUW“ and the calculated piece number „St.“ are displayed. The display value can be printed out by connecting an optional printer.
12.1.2 Numeric entry of the reference weight If the piece weight (reference) is known, it can be entered directly. As the balance in this method needs not to calculate any reference, the balance after confirming the reference piece weight will be directly in parts counting mode. In weighing mode press MENU button. The master menu will be displayed. Use the navigation buttons to select the menu item „Piece counting“. Acknowledge using PRINT button, the currently set reference quantity is displayed.
12.1.3 Automatic reference optimization In order to improve the counting exactness, the reference can be optimised by adding more pieces. At every reference optimisation, the reference weight is calculated anew. As the additional pieces increase the base for the calculation, the reference also becomes more exact. Leave the piece number on the weighing pan after setting the reference weight Duplicate the number of pieces on the weighing pan and wait until the acoustic signal sounds.
12.2 Density determination (Hydrostatic weighing) Density is the relationship of weight [g] : volume [cm3]. The weight is determined by weighing the sample in air. The volume results from the ascending force [g] of the sample dipped in a liquid. The density [g/cm3] of that liquid is known (principle of Archimedes). The density is determined with help of the underfloor weighing device. We recommend to switch off the automatic adjustment in the setup menu, see chap. 11.12. 12.2.
Suspend sample with suspension device at the flush-mounted hook. Wait for stability display, take over the weight value using PRINT button. The display for determination of the "sample in water“ appears. Immerse the sample without bubbles developing. Make sure that the sample does not touch the beaker. Wait for stability display, take over the weight value using PRINT button. The density of the sample is shown.
When an optional printer is connected, the displayed value can be edited using PRINT. Printout example (KERN YKB-01N): 07-09-11 11:14:57 d: 8.0700 g/cm3 If at the density determination errors have appeared, „d-----„ is displayed. 1. Back to density determination mode, press MENU button. 2. Back to weighing mode, press ON/OFF button.
Density table of water: * the asterisk means that the cipher left from the comma is reduced by 1. Table from "Mass determination" by M. Kochsiek, M.
12.2.2 Determining density of liquids For density determination of liquids, a sinker with known density is used (optionally available). The sinker is weighed first in air and then in the liquid whose density is to be determined. From the weight difference results the buoyancy from where the software calculates the density. Preparation: Fill sample liquid into a vessel, e.g. a pitcher. Heat sample liquid until temperature is constant.
Suspend sinker with suspension device at the flush-mounted hook. Wait for stability display, take over the weight value using PRINT button. The display for weight determination of the "Sinker in sample liquid“ appears. Immerse the sample without bubbles developing. Make sure that the sample does not touch the beaker. Wait for stability display, take over the weight value using PRINT button. The density of the sample is shown.
If at the density determination errors have appeared, „d-----„ is displayed. When an optional printer is connected, the displayed value can be edited using PRINT. Printout example (KERN YKB-01N): 07-09-11 11:14:57 3 d : 0.9984 g/cm 1. Back to density determination mode, press MENU button. 2. Back to weighing mode, press ON/OFF button.
12.3 Formula mode The formula function allows weighing of components which are in a certain relation one to the other. For check purpose, the weight of all components, as well as the total weight (TOT) can be printed out. The balance works with a separated memory for the weight of the weighing container and of the formula components. 12.3.1 Formulation without using the recipe data base Select formula mode „Manual“ In weighing mode press MENU button. The master menu will be displayed.
Weighing the second component (e.g. 5 g). Confirm by pressing the PRINT button. The weight is added to the summation memory and printed if an optional printer is connected. If required, weigh more components (max. 99) as described above. Complete Formulation process Press the PRINT button and keep it pressed until the acoustic signal gets mute. The total weight (TOT:) of all components will be displayed and edited on the printer. Printout example (KERN YKB-01N): 07-09-11 Manual 1. 2.
12.3.2 Formulation using the recipe data base 12.3.2.1 Store recipes The balance contains a recipe data base, where maximally 99 recipes each with 20 components can be filed. Select formula mode In weighing mode press MENU button. The master menu will be displayed. Use the navigation buttons to select the menu item „Formula“. Confirm by pressing the PRINT button. Define recipe and components 1. Use the navigation buttons to select the memory space number (e.g. 01) for the recipe.
3. Confirm by pressing the PRINT button. The display for entering the first component name appears. 4. Use the navigation buttons (see chap. 2.2.1) to enter the component name (max. 11 characters). 5. Confirm by pressing the PRINT button. The display to enter the quantity appears. 6. Use the navigation buttons (see chap. 2.2.1) to enter quantity.
7. Confirm by pressing the PRINT button. The input of the minus-tolerance is displayed. 8. Enter the negative tolerance value: ex.: -10 % 9. Confirm by pressing the PRINT button. The input of the plus-tolerance is displayed. 10. Enter the positive tolerance value: ex.: 5 % 11. Confirm by pressing the PRINT button 12. To enter more components (max. 20) repeat step 3 – 11 respectively. 13. Once having entered all components, use the ON/OFF button to exit the formula entry mode.
12.3.2.2 Invoke and work off the recipes After invoking a stored recipe (see chap. 12.3.2.1) the balance will be ready at once for weighing the components. Name and nominal value, tolerance and multiplication factor of the respective component are displayed. In weighing mode press MENU button. The master menu will be displayed. Use the navigation buttons to select the menu item „Formula“. Confirm by pressing the PRINT button.
Use the navigation buttons to enter the required multiplication factor. 1 = simple receipt quantity 2 = double receipt quantity 3 = triple receipt quantity etc. Use the PRINT button to confirm the selected factor: Example for factor 1 1 Tolerance value 2 Total weight of all components 3 Nominal value of the component 4 Total weight of all components 5 Displaying tolerance Overview tolerance display: Ex.: tolerance -10.0 % to +5.
The display for weighing the first component appears. Tare when using a weighing container. Start weighing. When the nominal value is reached, right next to the capacity display „OK“ will appear. If the nominal value is not reached (-) or exceeded (+), „Err 10“ will appear on the display after pressing the PRINT button. Correct the poured quantity. If the nominal weight is reached, press PRINT button. „Wait“ appears shortly followed by „Tare“.
After weighing and confirming the last component, the total weight (TOT:) of all components will be displayed and printed automatically. Printout example (KERN YKB-01N): 07-09-11 Cake 1. Salt 2. Sugar 3. ABC T= 11:14:57 Name receipt 10.00 g Weighing 1. component Name 1. component 70.00 g Weighing 2. component Name 2. component 0.50 g Weighing 3. component Name 3. component 80.50 g Total weight Back to formula mode, press the ON/OFF button and start the next recipe.
Example for factor 2: Call-up the required recipe as specified above Acknowledge using PRINT button, the first component and its nominal value as well as the negative and the positive tolerance value are displayed. Using the navigation buttons , all components including their nominal value and tolerance values can be displayed.
If the nominal weight is reached, press PRINT button. „Wait“ appears shortly followed by „Tare“. Then the display passes to „W=0“ and the display for weighing the second component appears. Now the nominal value is „40000 g“. Start weighing. When the nominal value is reached, right next to the capacity display „OK“ will appear. After weighing and confirming the last component, the total weight (TOT:) of all components will be displayed and printed automatically.
Back to formula mode, press the ON/OFF button and start the next recipe. Back to weighing mode, press ON/OFF button anew.
12.4 Check weighing In checkweighing an upper and a lower limit value can be established to ensure that the weighed goods are exactly within the established tolerance limits. The tolerance mark () and an acoustic signal (selectable) show, if the weighed material is within the two tolerance limits. Display of the results 1. Lower and upper limit value 0 Tolerance marker Tone Assessment no Load exceeds specified tolerance yes Load within specified tolerance no Load below specified tolerance 2.
Settings In weighing mode press MENU button. The master menu will be displayed. Use the navigation buttons to select the menu item „Checkweighing“. Press PRINT button to confirm, the display for entering the lower limit value will appear. Use the navigation buttons (see chap.2.2.1) to enter the lower limit value, e.g. 9.00 g. Press PRINT button to confirm, the display for entering the upper limit value will appear. Use the navigation buttons (see chap.2.2.
Start tolerance check Tare when using a weighing container Put on goods to be weighed, tolerance control is started Load below specified tolerance Load within specified tolerance Load exceeds specified tolerance When an optional printer is connected, the displayed value can be edited using PRINT. Printout examples (KERN YKB-01N): Load below specified tolerance Load within specified tolerance 07-09-11 11:14:57 Lim.1 : 9 000 g Lim.
12.5 Percent determination Percent determination allows weight display in percent, in relation to a reference weight. 12.5.1 Entering the reference weight by weighing In weighing mode press MENU button. The master menu will be displayed. Use the navigation buttons to select the menu item „Percent weigh.“. Confirm with the PRINT button, the currently set mode will be displayed. Use the navigation buttons to select setting „Automatic“.
12.5.2 Numeric entering of the reference weight In weighing mode press MENU button. The master menu will be displayed. Use the navigation buttons to select the menu item „Percent determin.“. Confirm with the PRINT button, the currently set drying mode will be displayed. Use the navigation buttons to select setting „Manual“. Confirm by pressing the PRINT button. Use the navigation buttons (see chap. 2.2.1) to enter the reference weight (100 %) in grams.
12.6 Animal weighing function The animal weighing function can be applied for busy weighings. During a defined period the mean value of the weighing results is formed. The more unquiet the weighed item, the longer the measuring time should be selected. In weighing mode press MENU button. The master menu will be displayed. Use the navigation buttons to select the menu item „Animal weigh.“. Confirm with the PRINT button, the currently set measuring time will be displayed.
12.7 Peak value function This function displays the highest load value (peak value) of a weighing. The peak value remains in the display until it will be deleted. In weighing mode press MENU button. The master menu will be displayed. Use the navigation buttons to select menu item „Maximum load“. Confirm using PRINT button, the taring process is automatically started. „Tare“ will be shortly displayed. From now on the balance is in peak value mode. Load weighing pan.
12.8 GLP function (Good laboratory practice) In the „GLP“ settings, information is defined, which will be edited in the measurement records. In weighing mode press MENU button. The master menu will be displayed. Use the navigation buttons to select the menu item „GLP.“. Confirm by pressing the PRINT button. The display to enter the balance identification number appears. Use the navigation buttons (see chap. 2.2.1) to enter the balance ID (max. 18 characters).
For GLP conformant printouts activate the menu setting „PRINT button_GLP“, see chap. 11.2 Printout example (KERN YKB-01N): 07-09-11 Balance ID: TEST 1 User ID: Miller Project ID: 789 11:14:57 Weight: 199.991 g G.L.P. Parameter Signature: ALT_B-PLT_A-PLT_F-BA-e-1333 Weighing data G.L.P.
13 Data output RS 232C RS232C The following conditions must be met to provide successful communication between the weighing balance and the printer. Use a suitable cable to connect the weighing balance to the interface of the printer/PC. Faultless operation requires an adequate KERN interface cable (optional). The baud rates of balance and printer must match (see chap.11.3). In the setup menu (see chap.11.
13.
13.4 Format Data transfer The data set consists of the following 14 characters: 1. Character Sign -/ blank (weighing value) 2-9. Character Weight or other data 10-12. Character Weighing unit 13. Character Stability display 14. Character Carriage return 15.
14 Error messages ERR01 Weight value instable or zeroing not possible. Check the environmental conditions. ERR02 Adjustment error, e.g. instable environmental conditions ERR03 Adjustment error e.g. incorrect adjustment weight} ERR04 Piece weight too small/instable ERR05 ERR06 ERR07 ERR08 “UNLOAD”: “CAL But” Data transfer not possible, as weighing value is instable. Check the environmental conditions. Weighing value in density determining mode instable. Check the environmental conditions.
15 Service, maintenance, disposal Before any maintenance, cleaning and repair work disconnect the appliance from the operating voltage. 15.1 Clean Please do not use aggressive cleaning agents (solvents or similar agents), but a cloth dampened with mild soap suds. Ensure that no liquid penetrates into the device. Polish with a dry soft cloth. Loose residue sample/powder can be removed carefully with a brush or manual vacuum cleaner. Spilled weighing goods must be removed immediately. 15.
15.4 Instant help In case of an error in the program process, briefly turn off the balance and disconnect from power supply. The weighing process must then be restarted from the beginning. Fault The displayed weight does not glow. Possible cause The balance is not switched on. The mains supply connection has been interrupted (mains cable not plugged in/faulty). Power supply interrupted.
16 Declaration of conformity KERN & Sohn GmbH D-72322 BalingenFrommern Postbox 4052 E-Mail: info@kern-sohn.de Phone: 0049-[0]7433- 9933-0 Fax: 0049-[0]7433-9933-149 Internet: www.kern-sohn.
