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 Pallet truck scales KERN VFS Version 1.
GB KERN VFS Version 1.1 10/2011 Operating instructions Pallet truck scale Contents 1 Technical data ................................................................................................ 4 2 Basic instructions about weighing system ................................................. 5 2.1 2.2 2.3 2.4 Proper use .................................................................................................................................. 5 Improper Use.......................................
8 Printer ........................................................................................................... 27 8.1 Paper change ........................................................................................................................... 29 9 Menu ............................................................................................................. 30 9.1 9.2 Navigation in the menu..........................................................................................
1 Technical data KERN Readability (d) Weighing range (max) Reproducibility VFS 2T1 1 kg 2000 kg 1 kg Linearity ± 2 kg Warm-up time 10 min Recommended adjustment weight (not added) class 1,5 t (M1) Allowable ambient temperature 0° C .... + 40° C Humidity of air max.
Dimensions in mm: 2 Basic instructions about weighing system 2.1 Proper use The weighing system 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 loading fork. As soon as a stable weighing value is reached the weighing value can be read.
2.2 Improper Use Do not use the weighing system for dynamic weighing. 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 weighing system. (Example: Slowly draining fluids from a container on the weighing system.) Do not leave permanent load on the loading fork. This may damage the measuring system.
3 Basic safety notes about weighing system 3.1 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. 3.2 Personnel training The appliance may only be operated and maintained by trained personnel. 4 Transport and storage 4.
5 Unpacking, Setup and Commissioning 5.1 Assembly of the pallet truck scale 5.1.1 Drawbar The drawbar is delivered separated from the hydraulic lifting device. Prior to commissioning the two components must be connected to each other. Details see below.
Ö Insert rod at the lower end of the draw chain at the oblong hole of the hydraulic lever till to the stopper Ö Fix the grab handle using 3 screws Ö To start-up the lifting mechanism screw down the adjustment screw till to the preset stopper VFS-BA-e-1111 9
5.1.2 Display unit Ö Loosen the screws at the side Ö Display unit will be assembled to the shown position Ö For assembly ensure that the cable is properly passed and not damaged.
Ö Screw-in 3 screws Ö Again screw-in the side screws VFS-BA-e-1111 11
5.2 Proper use of the lifting device Ö Lower the loading fork Ö Move the load Ö Lift the loading fork 5.3 Installation site, location of use of the weighing system The weighing system is designed to achieve reliable weighing results under normal conditions of use. You will work accurately and fast, if you select the right location for your weighing system. Therefore, observe the following for the installation site: • The load must be lifted clear of the display unit’s case and other pallets.
Load Pallet Non-optimal positioning of load Optimal positioning of load • Temperature range: The maximum deviation for 0.1% of the weighed load is between -10 and +40°C. Outside this temperature range deviations of up to 0.3% may occur. • Avoid jarring during weighing • Protect the weighing system against high humidity, vapours and dust • Do not expose the device to extreme dampness for longer periods of time.
5.
5.5 Rechargeable battery operation 5.5.
To economize the rechargeable battery, the weighing system switches off automatically x minutes after a finished weighing as preset in menu item „F3 oFF“ (chap. 9.2). If the capacity of the rechargeable battery is soon exhausted, in the display appears . The weighing system remains ready for operation for an the battery symbol other 30 minutes, after that it switches off automatically to economize the rechargeable battery.
5.
5.8 Overview of display Capacity display rechargeable battery: Capacity of rechargeable battery soon exhausted, see chap. 5.5 STABLE The weighing system (incl. load) is stable ZERO The weighing system is unloaded The indicated weight has a negative value GROSS The indicated value is a gross weight NET The indicated value is a net weight TARE One or several tare values have been saved kg, lb, oz.
5.9 Keyboard overview Each key provides an operating as well as an input function. Operating function Input function Switch on or switch off ------------------------------------- Zero-setting Confirm entry Input of tare • • • • Entering numeric values: Increases the numeric value of flashing digit by 1.
6 Adjustment 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). This adjustment process must be carried out for the first commissioning, after each change of location as well as in case of fluctuating environment temperature.
6.
7 Functions of display unit 7.1 Prior to weighing 7.1.1 Zero-point check Prior to each weighing process ensure that the system is unloaded and clear of obstructions. The display unit provides automatic zero adjustment. This means, that small deviations from the zero-point are corrected automatically. If the display unit does not correct the zero-point automatically you will have to carry out a manual correction with the help of the key. 7.1.
7.2 Weighing Ö Press downwards the hand lever of the lifting device, the weighing system is lowered. Ö Switch-on by „0.0“ , after a concluded self-test the system changes to zero display Ö If „0.0“ is not displayed, press Ö Place the loading fork under the pallet in a way that the pallet is in the centre of the loading fork.
7.4 Totalization The display unit offers an option that allows the addition of weighing values and the display of the total weight. If a tare weight is active, the net weight is automatically added up. Ö No load may be on the loading fork Ö The system should be stable (stability display „STABLE“ illuminated) Ö The added-up weighing value must be more than 20d.
Display of the saved weighing data: Ö The system must be in zero display („ZERO“-is displayed) Ö Press , „ACC n“ will be displayed (n means number of single weighings) and after that the total weight of the weighing will appear for approx. 2 seconds, before the weighing system returns into the standard-weighing mode. Ö Date, time, number of weighings, weight of the last single weighing and the total weight are printed out.
7.5 Numerical tare input (PRETARE) You may enter the tare weight at any time, that is, regardless whether the scales are in a loaded or unloaded state. To achieve higher accuracy, a tare weight with a higher resolution may be entered, regardless of the size of the weight and the display steps of the indicator. A tare weight which is bigger than the maximum of the weighing system, will not be accepted. 7.5.
Printout example (see chap. 8 printer): No. G.W. N.W. 6 Number of weighing procedures 66.0 kg Gross weight 34.0kg Net weight 7.5.2 Call-up stored tare weight Ö In weighing mode press , the stored tare value is displayed 7.5.3 Delete pretare value When entering the pretare value, set all decimal digits to „0“ 8 Printer The current weighing data my be printed out. Ö Press button. Ö A printout will be made. The current weight is added to the addition memory.
Format 1: Date Time 2011/06/09 Date 17:34:27 Time 18.30 kg Weight Format 2: Number of single weighings 2 Format 3: No. Weight of last weighing) 6.69kg 6 Number of weighing procedures G.W. 66.0 kg Gross weight N.W. 34.0kg Net weight Format 4: No. N.W. Format 5: Date Time No. N.W. TOTAL 28 3 Number of weighing procedures 18.30kg Weight of last weighing 2011/06/09 Date 17:34:27 Time 4 Number of weighing procedures 62.0 kg Weight of last weighing 245.
8.1 Paper change 1 Draw-off edge and paper outlet 2 Cover plate 3 Bracket Ö Switch off weighing system Ö Pull out the bracket until the cover plate opens; do not apply too much force in order to avoid damage. Ö Insert the paper roll, the loose side has to point forwards Ö Hold fast the loose side of the paper roll when the printer is being closed. To close the printer: Ö Press on both sides of the cover plate at the same time.
Dimensions Thermopaper: (in) diameter 47 mm Width 56 mm 9 Menu In the menu the settings of the weighing system can be modified and functions can be activated. With that the weighing system may be adapted to individual weighing requirements. Four menu items can be selected to change settings. Moreover there is an other menu item for adjustment. 9.
9.2 Menu overview Menu item Submenu item Description on F1Unt kg* oFF on lb oFF Weighing units adjustable: kg*, lb, oz on ozt oFF F2 dAt yy d-m-y mmdd HHmm yy y-m-d mmdd HHmm VFS-BA-e-1111 Display date and time: Indicator: day - month - year Display year Format: [JJ] Display month and day Format: [MM.TT] Display time (hour/minutes) Format: [hh.mm] Indicator: year - month - day Display year Format: [JJ] Display month and day Format: [MM.TT] Display time (hour/minutes) Format: [hh.
on Time display in standby mode on or off: on: If the system for more than 5 seconds remains in standby mode, the time will be displayed automatically oFF* oFF*: No time is displayed F3 oFF CLoCK on bk oFF F4 Prt Auto* Display background illumination on: Background illumination always on Auto*: Background illumination. switches on if any button is pressed, oFF oFF: Background illumination always off 0 Automatic switching-off of the weighing system after x minutes: Autom.
P1 rEF AZ 0 0 not documented 0.5 d 1d 2d 4d 0AUt0 0% not documented 2% 5% 10% 20% 0rAnG 2% not documented 4% 10% 20% 50% 100% SPEEd 7.
10 Service, maintenance, disposal 10.1 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 and wipe with a dry soft cloth. 10.2 Service, maintenance The same maintenance guidelines apply to the chassis of the mobile weighing system as those for simple manual pallet trucks.
11 Error messages Error message Possible cause Remedy ----- • Weighing range exceeded • To unload the weighing system Err 1 • Wrong input date • Format: Use format [JJ:MM:TT] Err 2 • Wrong input of time [hh.mm] • Format: Use format [hh:mm] Err 4 • System out of zero range during switching-on or by • Unload weighing system and tare again using pressing the Err 6 .
12 Instant help In case of an error in the program process, briefly turn off the weighing system and disconnect from power supply. The weighing process must then be restarted from the beginning. Help: Fault Possible cause The displayed weight does not glow. • Weighing system is not switched on. • Rechargeable battery empty The displayed weight is permanently • changing Draught/air movement • Sites with vibration. • Loading fork is in contact with foreign matter.
