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 manual Compact balance KERN FOB-N Version 1.
GB KERN FOB-N Version 1.0 09/2014 Operating manual Compact balance Contents 1 2 Technical data ................................................................................................ 4 Basic Information (General) .......................................................................... 6 2.1 2.2 2.3 2.4 Proper use .................................................................................................................................. 6 Improper Use ...................................
8 The menu ...................................................................................................... 20 8.1 8.2 8.3 8.3.1 8.3.2 8.4 8.4.1 8.4.2 Call up menu ............................................................................................................................ 20 Navigation in the menu ............................................................................................................. 20 Menu overview .............................................................
1 Technical data Models „FOB-NS“: KERN FOB 0.5K-4NS FOB 5K-3NS Readability (d) 0.1 g 1g Weighing range (max) 500 g 5000 g Reproducibility 0.1g 1g ± 0.2 g ±2g Linearity Weighing Units Recommended adjustment weight, not added (class) g, lb, oz, ozt, dwt 500 g (M1) 5000 g (M1) Warm-up time 10 min Stabilization time (typical) 2 sec. Operating temperature Humidity of air + 10° C ....
Models „FOB-NL“: KERN Readability (d) Weighing range (max) Reproducibility Linearity FOB 7K-4NL FOB 10K-3NL FOB 30K-3NL 0.5 g / 1 g 1g/2g 2g/5g 5 kg / 7.5 kg 8 kg / 15 kg 16 kg / 30 kg 0.5 g / 1 g 1g/2g 2g/5g ± 1.5 g / 3 g ±3g/6g ± 6 g / 15 g Weighing Units Recommended adjustment weight, not added (class) Warm-up time Stabilization time (typical) Operating temperature Humidity of air g, lb, oz, ozt, dwt 5 kg (M1) 10 kg (M1) 30 kg (M1) 30 min 30 min 30 min 2 sec. + 5° C ….
2 Basic Information (General) 2.1 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. 2.2 Improper Use Do not use balance for dynamic weighing.
2.4 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.
5 Unpacking, Setup and Commissioning 5.1 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.
5.2.1 Placing The balance must be installed in a way that the weighing plate is exactly in horizontal position. 5.2.2 Scope of delivery Serial accessories: • Balance • • Weighing plate Mains adapter (optional) • • Protective cover Operating manual 5.3 Mains connection (optional) The balance may be operated via the optional 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. 5.
In the menu you can activate the AUTO-OFF function (see chap. 8.4.2 “Automatic switch-off function“). According to the selected settings, the balance switches automatically off in order to spare the battery. The empty battery is indicated on the display by „LobAt“. Press button and change the battery/batteries immediately. If the balance is not used for a longer time, take out the battery/ies and store it/them separately. Leaking battery liquid could damage the balance. 5.
Procedure when adjusting: Observe stable environmental conditions. A warming up time (see chapter 1; Technical Data) is required for stabilization. Ensure that there are no objects on the weighing plate. Models FOB-NS: Balance display Operation Switch off the balance Press and hold time, release , press 3x at the same - an internal value is displayed.
Models FOB-NL: Balance display Operation Switch off the balance Press and hold time, release , press 3x at the same - an internal value is displayed. (example) Press , "0" is displayed Put adjustment weight in the centre of the weighing plate, wait for stability display and press , "CAL" is displayed, followed by the value of the adjustment weight. (example) Take away adjustment weight The balance changes into weighing mode. Adjustment has now been completed successfully.
6 Operating elements 6.1 Keyboard overview 6.1.
6.1.
6.2 Overview of display 6.2.1 Models FOB-NS: Display g, lb, oz, ozt, dwt Description Display weighing units Stability display 6.2.
7 Operation 7.1 Simple weighing Balance display Operation Start balance by pressing . The balance will carry out a self-test. Wait for „0“ display If the balance should not exactly display "0" despite the relieved weighing pan, press ("L" models) or ("S" models). The balance returns to „0“ Place goods to be weighed on balance. Wait until the stability display appears. (example) Read weighing result. To switch off the balance press shortly 16 .
7.2 Taring 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. Balance display Operation Deposit weighing vessel. The weight of the container is displayed. (example) Press ("L" models) or ("S" models), the zero display appears. The weight of the container is now internally saved. Place goods to be weighed in the weighing container.
7.4 Hold function (only "L" models) The balance has an integrated standstill function (mean value calculation). With this it is possible to weigh unstable samples to be weighed exactly. There are 2 possibilities: 1. Balance display Operation Start balance by pressing . The balance will carry out a self-test. Wait for „0“ display Put sample to be weighed in place and press ; "HOLD" will appear and a small triangle flashes. During this time, an average value is recorded.
2. Balance display Operation Start balance by pressing . The balance will carry out a self-test. Wait for „0“ display (example) Press , "HOLD" will appear and a small triangle flashes. During this time put samples to be weighed in place. The stability display will appear after a short time, the triangle will stop flashing and the obtained weight value is displayed. By pressing the balance returns to weighing mode. The triangle disappears. 7.
8 The menu 8.1 Call up menu „L“-Models: • Switch off the balance • Press and hold buttons. and press 3x at the same time, then release both „S“-Models: The menu is accessed by pressing 8.2 in weighing mode for approx. 3 seconds.
8.3 Menu overview 8.3.1 Models FOB-NS: *not documented 8.3.
8.4 Menu settings 8.4.1 Setting weighing units Balance display Operation FOB-S: In weighing mode press 3 seconds. button for approx. „SEt“, followed by „Unit“ is displayed FOB-L: Switch off the balance Press and hold and press 3x at the same time, then release both buttons. Press displayed (example) Use Press Use or again, the weighing unit „g“ is to change to the desired unit or , "OFF" is displayed to change to „On“ (example) (example) 22 Press and set.
Press repeatedly until „Unit“ is displayed Press , „A.Off“ will be shown Press , „CAP.“ is displayed Press , „End“ is displayed Press or Use to return to weighing mode to change between the set units In order to switch off the units display, proceed as described above and set the selected unit to „Off“.
8.4.2 Automatic switch-off function „AUTO OFF“ in stand-by mode The balance offers the possibility of the automatic switch-off, when the balance is in stand-by mode. The switch-off time may be selected as follows: Balance display Operation FOB-S: In weighing mode press 3 seconds. button for approx. „SEt“, followed by „Unit“ is displayed FOB-L: • Switch off the balance • Press and hold and press 3x at the same time, then release both buttons.
Use or displayed to adopt selection, „AOFF“ is Press , „CAP“ is displayed Press again, „End“ is displayed Using or the balance returns to weighing mode. The setting is saved. The auto-off function is only possible in battery operation. In mains operation this function is turned off.
9 Error messages Battery empty Insert new battery or connect the balance to power supply Remove load and set balance Weighing range exceeded Zeroing range not reached Software error to zero with or , if necessary Increase the load, if the error message remains, please contact your retailer Contact your retailer 10 Servicing, maintenance, disposal 10.1 Cleaning Before cleaning, please disconnect the appliance from the operating voltage.
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. The displayed weight is permanently changing The weighing result is obviously incorrect Possible cause • The balance is not switched on. • The mains supply connection has been interrupted (mains cable not plugged in/faulty). • Power supply interrupted.
