KERN & Sohn GmbH Ziegelei 1 D-72336 Balingen email: info@kern-sohn.com Phone: +49-[0]7433- 9933-0 Fax: +49-[0]7433-9933-149 Internet: www.kern-sohn.com Operating instructions Stainless steel scale KERN SFB Version 2.
GB KERN SFB Version 2.4 12/2013 Operating instructions stainless steel scale Table of Contents 1 Technical Data ................................................................................................... 4 2 Appliance overview ......................................................................................... 10 2.1 Keyboard overview ...................................................................................................11 2.1.1 2.2 3 Numeric input via navigation keys ....
7 Operation ......................................................................................................... 28 7.1 Start-up .....................................................................................................................28 7.2 Switching Off ............................................................................................................28 7.3 Zeroing ..............................................................................................................
1 Technical Data KERN SFB 10K1HIP SFB 15K5HIPM SFB 20K2HIP 1g 5g 2g 10 kg 15 kg 20 kg Minimum load (Min) - 100 g - Verification value (e) - 5g - Verification class - III - 1g 5g 2g Linearity ±1g ±5g ±2g Recommended adjustment weight, not added (class) 10 kg (M1) 15 kg (M1) 20 kg (M1) 30 minutes 10 minutes 30 minutes Readability (d) Weighing range (max) Reproducibility Warm-up time Stabilization time (typical) Weighing unit Auto Off Ambient temperature Moist environment
KERN SFB 30K10HIPM SFB 50K5HIP SFB 50K5LHIP SFB 50K-3XL Readability (d) 10 g 5g 5g 5g Weighing range (max) 30 kg 50 kg 50 kg 50 kg Minimum load (Min) 200 g - - - Verification value (e) 10 g - - - III - - - 10 g 5g 5g 5g Linearity ± 10 g ±5g ±5g ± 10 g Recommended adjustment weight, not added (class) 30 kg (M1) 50 kg (M1) 50 kg (M1) 50 kg (M1) 10 minutes 30 minutes 30 minutes 30 minutes Verification class Reproducibility Warm-up time Stabilization time (typical
KERN SFB 60K20HIPM SFB 60K20LHIPM SFB 60K-2XLM Readability (d) 20 g 20 g 20 g Weighing range (max) 60 kg 60 kg 60 kg Minimum load (Min) 400 g 400 g 400 g Verification value (e) 20 g 20 g 20 g III III III 20 g 20 g 20 g Linearity ± 20 g ± 20 g ± 20 g Recommended adjustment weight, not added (class) 60 kg (M1) 60 kg (M1) 60 kg (M1) 10 minutes 10 minutes 10 minutes Verification class Reproducibility Warm-up time Stabilization time (typical) 2 sec.
SFB 100K10HIP SFB 100K-2L SFB 100K-2HM SFB 100K-2LM 10 g 10 g 50 g 50 g 100 kg 100 kg 150 kg 150 kg Minimum load (Min) - - 1 kg 1 kg Verification value (e) - - 50 g 50 g Verification class - - III III 10 g 10 g 50 g 50 g Linearity ± 10 g ± 20 g ± 50 g ± 50 g Recommended adjustment weight, not added (class) 100 kg (M1) 100 kg (M1) 120 kg (M1) 150 kg (M1) 30 minutes 30 minutes 10 minutes 10 minutes KERN Readability (d) Weighing range (max) Reproducibility Warm-up
KERN SFB 100K-2XL SFB 100K-2XLM SFB 120K50HIPM 10 g 50 g 50 g 100 kg 150 kg 120 kg Minimum load (Min) - 1 kg 1 kg Verification value (e) - 50 g 50 g Verification class - III III 10 g 50 g 50 g Linearity ± 20 g ± 50 g ± 50 g Recommended adjustment weight, not added (class) 100 kg (M1) 150 kg (M1) 120 kg (M1) 30 minutes 10 minutes 10 minutes Readability (d) Weighing range (max) Reproducibility Warm-up time Stabilization time (typical) 2 sec.
SFB 200K-2XL SFB 300K-1LM 20 g 100 g 200 kg 300 kg Minimum load (Min) - 2 kg Verification value (e) - 100 g Verification class - III 20 g 100 g Linearity ± 40 g ± 100 g Recommended adjustment weight, not added (class) 200 kg (M1) 300 kg (M1) 30 minutes 10 minutes KERN Readability (d) Weighing range (max) Reproducibility Warm-up time Stabilization time (typical) Weighing unit Auto Off Ambient temperature Moist environment 2 sec.
2 Appliance overview 1. 2. 3. 4. 5. 6. 7. 10 Battery status display Keyboard Weight display Tolerance tag, see chap. 7.
2.
2.1.1 Numeric input via navigation keys Press current setting appears. The first digit is flashing and can be changed. If the first digit is not to be changed, press and the second digit will start flashing. Each time you press , the display unit jumps to the subsequent digit, returning to the first digit after the last digit has been pressed. To change the selected (flashing) digit, press repeatedly until the desired value appears.
3 Basic Information (General) 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 balance”, i.e. the material to be weighed is manually and carefully placed in the centre of the weighing plate. 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 weighing.
3.4 Monitoring of Test Resources In the framework of quality assurance the measuring-related properties of the balance and, if applicable, the testing weight, must be checked regularly. The responsible user must define a suitable interval as well as type and scope of this test. Information is available on KERN’s home page (www.kern-sohn.com with regard to the monitoring of balance test substances and the test weights required for this.
6 Unpacking and implantation 6.1 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.
Remove the transportation lock: 1. Models platform size 300 x 240 mm Remove the marked screws. 2. Models platform size 400 x 300 mm Remove the screw marked by the label . Attention: The sealed screws must not be unscrewed. Accurate weighing results require a weighing bridge with perfect horizontal alignment. During initial installation and after each change of work area it is necessary to level the weighing bridge. As the air bubble is located under the weighing plate, remove it.
6.2.1 Tripod Assemble example models platform size 300 x 240 mm: Attach the tripod to the platform acc. to fig. using the 4 screws [1], securing disks and washers. Ensure that the cable is not damaged nor squeezed. Screw-in support screw [2] till it is safely fixed.
Remove display unit from holder, for that remove the turning knobs [3] on the side. Attach the tripod with the four raised counter-sunk head screws [4] and the nuts on the holder of the display unit. Re-attach and position display unit using the turning knobs [3].
Scope of delivery models platform size 400 x 300 mm: SFB-BA-e-1324 Tripod tube Adapter display unit Tripod foot 19
6.3 Mains connection Power is supplied via the external mains adapter. The stated voltage value must be the same as the local voltage. Only use original KERN mains adapters. Using other makes requires consent by KERN. 6.4 Rechargeable battery operation Before the first use, the battery should be charged by connecting it to the mains power supply for at least 12 hours. The symbol appearing on the weight display indicates that the battery is getting low.
6.6 Adjustment As the acceleration value due to gravity is not the same at every location on earth, each display unit with connected weighing plate 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 weighing system has not already been adjusted to the location in the factory).
6.6.1 Verified models In verified weighing systems the menu item for adjustment „P2 mode“ is blocked. To override the blocked access you will have to destroy the seal before calling up the menu and to short-circuit the two contacts on the circuit board [K2], using a jumper (See chap.6.7). Attention: After destruction of the seal the weighing system must be re-verified by an authorised agency and a new verification wire/seal mark fitted before it can be reused for applications subject to verification.
How to carry out an adjustment: Confirm menu setting „noLin“ by . Ensure that there are no objects on the weighing plate. Wait for stability display, then press . The currently set adjustment weight will be displayed. To change by using the navigation buttons (see chap. 2.1.1) select the desired setting, the active digit is flashing. Acknowledge with . Carefully place adjusting weight in the centre of the weighing plate. Wait for stability display, then press .
6.6.2 Non verifiable models Call up menu: 1. Switch-on balance and during the selftest press 2. Press subsequently , „PO CHK“ will be displayed. 3. Press , . the first menu block repeatedly until „P3 CAL“ will be displayed. 4. Confirm with appears. repeatedly until „CAL“ ; press 5. Acknowledge using , the current setting is displayed. Press to confirm; press to select setting. noLin = adjustment LineAr = linearization, see chap. 6.
6.7 Linearization Linearity shows the greatest deviation of a weight display on the scale to the value of the respective test weight according to plus and minus over the entire weighing range. If linearity deviation is discovered during a testing instrument control, you can improve this by means of linearization. In balances with a resolution of > 15 000 dividing steps carrying out a linearisation is recommended.
6.7.2 Non-verified models Call-up menu item P3 CALCalLiner, see chap. 6.5.1 Confirm by , the password query „Pn“ will be displayed. Press subsequently , , or , , Ensure that there are no objects on the weighing pan. Wait for stability display, then press . . When “Ld 1“ is displayed, put the first adjustment weight (1/3 max) carefully in the centre of the weighing platform. Wait for stability display, then press .
6.8 Verification General introduction: According to EU directive 90/384/EEC or 2009/23EG 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.
7 Operation 7.1 Start-up Press , and the instrument will carry out a self-test. The instrument is ready for weighing when a weight display appears. 7.2 Switching Off Press until the display disappears. 7.3 Zeroing Resetting to zero corrects the influence of light soiling on the weighing plate. Resetting range ± 2 % max. The instrument comprises an automatic zero setting function, however, the instrument can be reset to zero whenever needed as described below.
7.5 Switch-over weighing unit (only not verifiable models) How to enable weighing units: Call-up menu item P5 Unt, see chap. 8 Press and the first weighing unit with the current setting will be displayed. To enable [on] / disable [off] the displayed weighing unit, press . Acknowledge with will be displayed. . The next unit with the current setting To enable [off] / disable [on] the displayed weighing unit, press . Acknowledge with . Repeat sequence for each weighing unit.
7.6 Weighing with tare Deposit weighing vessel. After successful stop check press the The zero display and the indicator NET appear. button. The weight of the container is now internally saved. Weigh the material, the net weight will be indicated. The weight of the weighing container will be displayed as a minus number after removing the weighing container.
Optical signal: Three colour pilot lamps indicate whether load is within the two tolerance limits. The signal lamps provide the following information: + Goods to be weighed above tolerance limit Red signal lamp glowing Goods to be weighed within tolerance range Green signal lamp glowing Goods to be weighed below tolerance limit Red signal lamp glowing - Settings for tolerance weighing may be set either by calling up menu block “P0 CHK“ (See chap.
Press the navigation keys (See chap. 2.1.1) to enter the upper limit, e.g. 1,100 kg; the currently enabled digit will be flashing. Confirm input by Press . repeatedly until is displayed. Press and the current setting for the acoustic signal will be shown. Select desired setting (no, ok, ng) by Confirm input by . . Press ; weighing system is in tolerance weighing mode. From here evaluation takes place whether the goods to be weighed are within the two tolerance limits.
7.7.2 Tolerance check for target quantity Settings Press Press Press and at the same time in weighing mode. until the display for entering the lower limit value appears. , the current setting will be displayed. To enter the lower limit, e. g. 75 items, press the navigation buttons (see chap. 2.1.1); the currently enabled digit will be flashing. Confirm input by Press . repeatedly until is displayed. Press , the current setting for the upper limit will be displayed.
Press ; weighing system is in tolerance weighing mode. From here evaluation takes place whether the goods to be weighed are within the two tolerance limits. Weighing with tolerance range Set item weight, see chap. 7.10. Tare when using a weighing container. Put on goods to be weighed, tolerance control is started. The signal lights indicate whether the load is within the two set limits.
7.8 Manual totalizing With this function the individual weighing values are added into the summation memory by pressing and edited, when an optional printer is connected. Menu settings: „P1 COM“ or „P2 COM“ „MODE“ „PR2““, see chap. 8 The totalisation function is not active when the weight is under 20d. Add up: Place goods to be weighed A. Wait until the stability display STABLE appears, then press . The weight value will be saved and a printout received if an optional printer is connected.
Delete weighing data: Press deleted. and at the same time.
7.9 Automatic adding-up With this function the individual weighing values are automatically added into the summation memory when the balance is unloaded without pressing when an optional printer is connected. and edited, Menu settings: „P1 COM“ or „P2 COM“ „MODE“ „AUTO““, see chap. 8 Indicator AUTO is displayed. Add up: Place goods to be weighed A. After the standstill control sounds a signal tone. The weighing value is added to the summation memory, followed by printing.
7.10 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.
7.11 Animal weighing The animal weighing function is ideal for unstable loads. The weighing system calculates and displays a stable mean average from several weighing values. The animal weighing program may either be enabled by calling up menu block “P3 OTH“ or “P4 OTH“ „ANM“ „ON“ (See chap. 8) or by using the faster option of a key combination. The indicator shows HOLD as long as the animal weighing function remains enabled. Place the load onto the weighing system and wait until it is fairly stable.
7.12 Lock keyboard Go to menu item “P3 OTH“ or “P4 OTH“ „LOCK“, see chap. 8, and enable/disable the keyboard interlock. The enabled function will be locked after 10 minutes of inactivity. “K-LCK“ will be displayed as soon as a key is pressed. To cancel locking, keep pressed LCK“ appears. , and at the same time (2s) until “U 7.13 Display background illumination Keep pressed (3s) until “setbl“ appears. Press again and the current setting will be displayed. Use to select desired setting.
7.14 Automatic switch-off function “AUTO OFF“ The instrument will switch off automatically after a set time when the display unit or weighing bridge has been idle. Keep pressed (3s) until “setbl“ appears. Call up AUTO OFF function using Press Use - current setting appears. to select desired setting. of 0 AUTO OFF - of 3 Weighing system will be turned off after 3 min. of 5 Weighing system will be turned off after 5 min. of 15 Weighing system will be turned off after 15 min.
8 Menu Navigation in the menu: Call up menu Switch-on balance and during the selftest press . Press , , subsequently, the first menu block „PO CHK“ will be displayed. Select menu block Select setting With help of , the individual menu items can be selected one after the other. Confirm selected menu item by pressing current setting will be displayed. . The Change settings To change to the available settings, press the navigations keys as described in chap. 2.1.
8.1 Overview non verifiable models Menu block Main menu PO CHK Weighing with tolerance range, see chap. 7.7 Menu item Submenu SET H Available settings / explanation Upper limit value „Tolerance check weighing“, input see chap. 7.7.1 SET LO Lower limit value „Tolerance check weighing“, input see chap. 7.7.1 PCS H Upper limit value „Tolerance check counting“, input see chap. 7.7.2 PCS L Lower limit value „Tolerance check counting“, input see chap. 7.7.
Pr PTYPE Lab 7E1 7o1 8n1* tPUP* LP50 Lab x (Lab 0*) Prt Prt x 7 bits, even parity 7 bits, odd parity 8 bits, no parity Standard printer setting Not documented For data output format, see chap.8.2, tab. 1 (Prt 0*) LAnG P3 CAL Configuration data COUNT DECI DUAL CAL GrA P4 OTH LOCK ANM P5 Unt Switch-over weighing unit, see chap. 7.
8.2 Overview verified models In verified weighing systems the access to „P2 mode and „P4 tAr“ is locked. In order to unlock the access, the seal must be destroyed and both contacts of the printed circuit board [K2] must be short-circuited by a jumper, see chap. 6.11. Attention: After destruction of the seal the weighing system must be re-verified by an authorised agency and a new verification wire/seal mark fitted before it can be reused for applications subject to verification.
P2 mode SiGr Single-range balance COUNT DECI Div. CAP Konfigurationsdaten CAL GrA dUAL 1 Display internal resolution Position of the decimal dot Readability [d] / verification value[s] Balance capacity [Max] noLin Adjustment, see chap. 6.5 LinEr Linearisation, see chap. 6.
P4 tAr Restricted taring range Press , the current setting will be displayed. Using the navigation buttons (see chap. 2.1.1) select the desired setting, the active digit is flashing. Confirm input by P5 St St on St off 7.5, 15, 30 Follow up tare P6 SP . Follow up tare switched on Follow up tare switched off Not documented Tab. 1. Printout examples Standard printer Lab 0 Prt 2 ******************* GS: 5.000kg ******************* ******************* NT: 5.000kg TW: 5.000kg GW: 10.
9 Service, maintenance, disposal 9.1 Cleaning Before cleaning, disconnect the appliance from the operating voltage. Cleaning is possible by water jet and short-time immersion. Do not apply aggressive detergents (solvents etc.). 9.2 Service, maintenance The appliance may only be opened by trained service technicians who are authorized by KERN. Before opening, disconnect from power supply. 9.
9.4 Error messages Error message Description ----- Possible causes Maximum load exceeded Unload weighing system or reduce preload.
10 Data output RS 232C (optional) Weighing data can be issued according to menu settings either via the RS 232C interface or by pressing via the interface. This data exchange is asynchronous using ASCII - Code. 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. Faultless operation requires an adequate KERN interface cable.
Symbols: ST Stable value US Instable value GS / GW Gross weight NT Net weight TW Tare weight NO Number weighing processes TOTAL Total of all individual weighings Space line Space line Counting **************************** PCS 100 **************************** 10.4 Output log (continuous output) Weighing HEADER1: ST=STABLE， US=UNSTABLE HEADER2: NT=NET， GS=GROSS 10.
11 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. Help: Fault The displayed weight does not glow. Possible cause The balance is not switched on. Mains power failure (mains cable defective). Power supply interrupted. (Rechargeable) batteries are inserted incorrectly or empty No (rechargeable) batteries inserted.
12 Declaration of Conformity KERN & Sohn GmbH D-72322 Balingen-Frommern Postbox 4052 E-Mail: info@kern-sohn.de Phone: 0049-[0]7433- 9933-0 Fax: 0049-[0]7433-9933-149 Internet: www.kern-sohn.
