KERN & Sohn GmbH Ziegelei 1 D-72336 Balingen E-mail:info@kern-sohn.com Tel: +49-[0]7433- 9933-0 Fax: +49-[0]7433-9933-149 Internet: www.kern-sohn.com Operating Manual Precision balance KERN PCB Version 1.
GB KERN PCB Version 1.5 02/2013 Operating Manual Compact balance Table of Contents 1 Technical Data ............................................................................................... 4 2 Declaration of conformity ............................................................................. 7 3 Basic Information (General) .......................................................................... 8 3.1 3.2 3.3 3.4 Proper use ...............................................................
9 Menu ............................................................................................................. 20 9.1 Navigation in the menu .......................................................................................................... 20 9.2 Menu overview ........................................................................................................................ 23 9.3 Description of individual menu items ......................................................................
1 Technical Data KERN PCB 100-3 PCB 200-2 0,001 g 0,01 g 0,001 g 0,001 g Weighing range (max) (d) 100 g 200 g 250 g 350 g Taring range (subtractive) 100 g 200 g 250 g 350 g Reproducibility 0,001 g 0,01 g 0,001 g 0,002 g Linearity ±0,003 g ± 0,02 g ±0,003 g ±0,004 g Minimum unit weight at piece counting 0,002 g 0,02 g 0,002 g 0,002 g Readability (d) Warm-up time 2 hours Reference quantities at piece counting Weighing Units Recommended adjustment weight, not added (class)
KERN Readability (d) PCB 1000-1 PCB 1000-2 PCB 2000-1 PCB 2500-2 0,1 g 0,01 g 0,1 g 0,01 g Weighing range (max) (d) 1000 g 1000 g 2000 g 2500 g Taring range (subtractive) 1000 g 1000 g 2000 g 2500 g Reproducibility 0,1 g 0,01 g 0,1 g 0,01 g Linearity ±0,2 g ±0,03 g ±0,2 g ±0,03 g Minimum unit weight at piece counting 0,2 g 0,02 g 0,2 g 0,02 g 30 minutes 2 hours 30 minutes 2 hours Warm-up time Reference quantities at piece counting Weighing Units Recommended adjustment wei
KERN PCB 6000-0 PCB 10000-1 PCB 3500-2 PCB 6000-1 Readability (d) 0,01 g 0,1 g 1g 0,1 g Weighing range (max) (d) 3500 g 6 kg 6 kg 10 kg Taring range (subtractive) 3500 g 6 kg 6 kg 10 kg Reproducibility 0,02 g 0,1 g 1g 0,1 g Linearity 0,04 g ± 0,3 g ±2g ± 0,3 g Minimum unit weight at piece counting 0,02 g 0,2 g 2g 0,2 g Warm-up time 2 hours 2 hours 30 minutes 2 hours Reference quantities at piece counting 5, 10, 20, 25, 50 Details „Weighing units“ see chpt. 9.
2 Declaration of conformity KERN & Sohn GmbH D-72322 Balingen-Frommern Postbox 4052 email: info@kern-sohn.de Phone: 0049-[0]7433- 9933-0 Fax: 0049-[0]7433-9933-149 Internet: www.kern-sohn.
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.
4 Basic Safety Precautions 4.1 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. Versions in other languages are non-binding translations. The only binding version is the original document in German. 4.2 Personnel training The appliance may only be operated and maintained by trained personnel. 5 Transportation & Storage 5.
Major display deviations (incorrect weighing results) may be experienced should electromagnetic fields (e.g. due to mobile phones or radio equipment), static electricity accumulations or instable power supply occur. Change location or remove source of interference. 6.2 Unpacking/erection Carefully remove the balance from the packaging, remove plastic cover and setup balance at the intended workstation. The balance must be installed in a way that the weighing plate is exactly in horizontal position.
6.4 Operation using a (rechargeable) battery (optional) Lift-off the battery cover on the lower side of the balance. Connect 9 V compound battery. Replace the battery compartment cover. For battery operation the balance has an automatic switch-off function which can be activated or deactivated in the menu (chapter 9). In weighing mode keep the PRINT-key pressed until [Unit] appears. Press MODE key repeatedly until „AF“ appears. Use the SET key, to confirm.
6.6 Initial Commissioning In order to obtain exact results with the electronic balances, your balance must have reached the operating temperature (see warming up time chap. 1). During this warming up time the balance must be connected to the power supply (mains, accumulator or battery). The accuracy of the balance depends on the local acceleration of gravity. Strictly observe hints in chapter Adjustment. 6.
6.9 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 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. Fig.
7 Operation elements 7.1 Overview of display 7.
8 Basic Operation Start-up ON OFF Switching Off Press ON button. The balance will carry out a self-test The balance is ready for weighing when the weight display appears. Press OFF button, the display disappears ON OFF Weighing Place goods to be weighed on balance Wait for standstill control, after the standstill control, the weighing unit appears right hand in the display (e.g. g or kg) Read weighing result.
Weigh the material, the net weight will be indicated. The taring process can be repeated any number of times, e.g. when adding several components for a mixture (adding). The limit is reached when the whole weighing range is exhausted. The weight of the weighing container will be displayed as a minus number after removing the weighing container. The tare weight is saved until it is deleted.
Plus/minus weighings TARE For example unit weight control, fabrication control etc. Put the nominal weight on the weighing plate and tare using the TARE button. Remove the nominal weight Put the test objects subsequently on the weighing plate, the respective deviation from the nominal weight is displayed with the respective sign to „+“ and „-“. According to the same procedure also packages with the same weight can be produced, referring to a nominal weight.
Back to weighing mode by pressing the MODE button. Error message „Er 1“ Piece below minimum weight of piece (See chpt. 1 “Technical specifications“): Press MODE key and restart reference determination. Taring The tare vessels can also be used for piece counting. Before starting piece counting use the TARE button to tare out the container.
Percent determination MODE CAL Percentage calculation facilitates weight display in percent related to a reference weight equivalent to 100 %. In weighing mode press MODE key repeatedly, until [100 %] is displayed. Put a reference weight which corresponds to 100 %. Store by pressing the SET key. Remove reference weight. SET M Place goods to be weighed on balance. The weight of the sample is displayed in percentage in terms of the reference weight.
9 Menu 9.1 Navigation in the menu Access to menu PRINT In weighing mode keep the PRINT key pressed until [Unit] appears. How to select menu items MODE CAL Using the MODE key the individual menu items can be selected one after the other. How to change settings SET M Acknowledge selected menu item using SET key, the current setting is displayed. MODE CAL Change the settings using the MODE key. At any pressing of the MODE key, the next setting is displayed, see chapter 9.2 „Menu Overview“. 1.
2. Change settings of several menu items SET M Acknowledge selected menu item using SET key, the current setting is displayed. Use the MODE key to change settings. MODE CAL Press the TARE key, „Exit“ is displayed. TARE Either SET M Acknowledge with SET key (yes), „StorE“ is displayed.
Save/reject and exit the menu SET M Save SET M Reject Either Any changes carried out are stored by pressing the SET key (yes). The balance returns automatically into weighing mode. or PRINT To cancel changes, press the PRINT key (no). The balance returns automatically into weighing mode.
9.2 Menu overview Description of function Function Parameter Weighing units switching over (see chapter 9.3). UNIT g* Gram kg Kilogram (dependent on model) oz Pound ozt Ounce lb Troy ounce tlh Tael Hongkong tlt Tael Taiwan gn Grain (dependent on model) dwt Pennyweight model) mo Momme Tol Tola ct Carat (dependent on model) FFA Data transfer mode (see chapter 9.4) Pr rE CR* Pr PC AU PC bA Pr AU Pr Selection printer output (see chapter 9.
Baud rate bAUd (see chapter 9.4). 19200 9600* 4800 2400 1200 Auto off (battery operation), see chap. 6.4 Auto Zero (see chapter 9.3) Selection adjustment weight (see chapter 9.3) on* Automatic switch-off function after 3 min without changing load ON off Automatic switch-off function after 3 min without changing load OFF on* On off Off AF tr CAL 100 200 *dependent on model 300 Background illumination of the display, (see chap. 9.3) Animal weighing function (see chapter 9.
9.3 Description of individual menu items Weighing Units In weighing mode keep the PRINT key pressed until [Unit] appears. Press SET key, the selected unit is displayed. Use the MODE key to select between the different units (see following table).
Dosing and The Auto-Zero function is used to tare small variations in weight automatically. Zero-tracking 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“ in the balance. (Example: Slowly draining fluids from a container on the balance). When apportioning involves small variations of weight, it is advisable to switch off this function.
PCB 100-3 PCB 200-2 PCB 250-3 PCB 350-3 PCB 1000-1 20g 50g 70g 50g 100g 150g 200g 100g 150g 200g 300g 350g 200g 500g 700g 100g 50g 100g 150g 200g 250g PCB 1000-2 PCB 2000-1 PCB 2500-2 PCB 3500-2 PCB 6000-0 200g 500g 700g 500g 1000g 1500g 2000g 1000g 1500g 2000g 3000g 3500g 1000g 2000g 5000g 1000g 500g 1000g 1500g 2000g 2500g PCB 6000-1 PCB 10000-1 1000g 2000g 5000g 6000g 2000 g 5000g 7000g 10000g PCB-BA-e-1315 1000g 6000g 27
Display background illumination In weighing mode keep the PRINT key pressed until [Unit] appears. Press the MODE button several times until „bl“ is displayed. Acknowledge using SET key, the current setting is displayed. Select the desired settings by pressing the MODE key. bl on bl off bl Ch Background illumination switched on Background illumination switched off Contrastful display which can also be red in the darkness.
Animal weighing function The animal weighing function can be applied for busy weighing. During a defined period the average value of the weighing results is formed. The more unquiet the weighed item, the longer the period should be selected. In weighing mode keep the PRINT key pressed until [Unit] appears. Press the MODE button several times until „ANL“ is displayed. Acknowledge using SET key, the current setting is displayed.
Reset to factory setting This function resets all balance settings to factory setting. In weighing mode keep the PRINT key pressed until [Unit] appears. Press the MODE button several times until „rSt“ is displayed. Acknowledge using SET key, the current setting is displayed. Select the desired settings by pressing the MODE key rSt rSt yes no Balance will be reset to factory setting. The balance keeps its individual setting Use the SET key to confirm selection.
9.4 Interface parameters Data output is carried out via interface RS 232 C. General The previous condition for the data transfer between balance and a peripherical device (e.g. printer, PC ...) is that the appliances are set to the same interface parameters (e.g. baud rate, transfer mode ...). Data transfer mode In weighing mode keep the PRINT key pressed until [Unit] appears. Press the MODE button several times until „Pr“ is displayed. Acknowledge using SET key, the current setting is displayed.
printout Using this function data are selected which are to be sent via the RS232C (not valid for data transfer mode BAPr ). In weighing mode keep the PRINT key pressed until [Unit] appears. Press the MODE key several times until „LAPr“ is displayed. Acknowledge using SET key, the current setting is displayed.
Baud rate The baud rate defines the transfer speed vie the interface, 1 Baud = 1 Bit/second. In weighing mode keep the PRINT key pressed until [Unit] appears. Press the MODE key several times until „bAUd“ is displayed. Acknowledge using SET key, the current setting is displayed. Use MODE key select the desired settings 9600 4800 2400 1200 19200 Use the SET key to confirm selection. The balance returns to weighing mode. 10 Data output RS 232 C 10.
10.3 Explanation of the data transfer Pr PC: Press the PRINT key, at stable weight the format is transferred from LAPR. a. Format for stable values for weight/quantity/percentage 1 2 3 4 5 6 7 8 9 10 11 12 13 M S N1 N2 N3 N4 N5 N6 N7 N8 N9 N10 B 14 U1 15 U2 16 U3 17 18 CR LF b. Format in case of fault 1 2 3 4 5 6 B B B B B B 14 r 15 o 16 r 17 18 CR LF 7 B 8 B 9 B 10 B 11 B 12 E 13 r AU Pr: As soon as the weighing value is stable, the format is automatically transferred from LAPR. c.
rE Cr: The remote control commands s/w/t are sent from the remote control unit to the balance as ASCII code. After the balance having received the s/w/t commands, it will send the following data. Take into account that the following remote control commands must be sent without a subsequent CR LF.
10.4 Output on bar code printer The data transfer mode has to be set on „BA Pr“ (chapter 9.4). As bar code printer the Zebra printer model LP2824 is provided. Take into account that the output format of the balance is fixedly defined and cannot be changed. The printer format is stored in the printer, i.e. in case of a failure the printer cannot be changed with a new one from factory, previously it is necessary that KERN installs the respective software.
12 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. The mains supply connection has been interrupted (mains cable not plugged in/faulty). Power supply interrupted. Batteries are inserted incorrectly or empty No batteries inserted.
