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 Electronic Crane Scales Logbook Regular maintenance and care KERN HFA Version 1.
GB KERN HFA Version 1.1 01/2015 Operating instructions / logbook Electronic Suspended balance Contents 1. Technical data _________________________________________________ 4 1.1 Dimensions __________________________________________________________ 6 2. General Safety Instructions ______________________________________ 8 2.1 Duties of the owner-operator ___________________________________________ 8 2.2 Organizational measures ______________________________________________ 8 2.
5. Operation ____________________________________________________ 21 5.1 Safety instructions ___________________________________________________ 21 5.2 Loading the suspended balance _______________________________________ 22 5.3 Turn on/off __________________________________________________________ 25 5.4 Set balance to zero __________________________________________________ 25 5.5 Taring ______________________________________________________________ 25 5.
1. Technical data KERN HFA 600K-1 HFA 1T-4 HFA 3T-3 Readability (d) 0.2 kg 0.5 kg 1 kg Weighing range (max) 600 kg 1000 kg 3000 kg 599.8 kg 999.5 kg 2999 kg 0.2 kg 0.5 kg 1 kg ± 0.
KERN HFA 5T-3 HFA 10T-3 2 kg 5 kg Weighing range (max) 5000 kg 10000 kg Taring range (subtractive) 4998 kg 9995 kg 2 kg 5 kg ± 4 kg ± 10 kg 3000 kg (M3) 10000 kg (M3) Readability (d) Reproducibility Linearity Recommended adjustment weight, not added (class) Stabilization time 2s Warm-up time 10 min Units kg, lb, N Auto off 10 min Allowable ambient temperature 5…+35 °C Ambient humidity (max) 80 % Power supply unit 100 – 240 V, 50 / 60 Hz Input Voltage Device 9 V, 800 mA 3 x 1.
1.1 Dimensions Balance 0.
Balance 5 t Balance 10 t HFA-BA-e-1511 7
2. General Safety Instructions 2.1 Duties of the owner-operator Follow national accident prevention regulations and all operator health and safety at work and operating regulations. Observe all safety regulations of the crane manufacturer. The balance may only be used for the proposed purpose. Any type of use which is not specified in these operating instructions, will be considered as improper use.
2.4 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. 2.5 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.
2.8 Safe working Do not stand under swinging loads, see chap. 5.1. Position the crane in a way that the load is lifted vertically. When working with the crane and suspended balance wear personal safety equipment (helmet, safety shoes etc.). 2.9 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.
3. Appliance overview 1 Anchor eyelet 2 Display 3 Keyboard Lifting tackle not included in scope of delivery. Standardised attachment devices are to be used to attach loads.
Rear Battery or rechargeable battery compartment 12 Mains connection HFA-BA-e-1511
3.
3.2 Keyboard overview Button Description of function • Taring • Zeroing • Exit menu / back to weighing mode.
3.3 Label Do not stand or go under suspended loads. Do not use on building site. Keep an eye on suspended loads. Do not exceed nominal rated load of balance. (example) The product conforms to the requirements of the German Equipment and Product Safety Act.
4. Commissioning + 4.1 Always observe chapter 2 „General Safety Instructions“! Unpacking Once delivered and unpacked, suspended balances will not be taken back. SAFETY INSTRUCTIONS for protection against The crane scales have been sealed by Messrs. KERN. Removal from packaging is also sealed. + Broken seal obliges to purchase. break Fig.: Seal Thanks for your comprehension. Your KERN Quality assurance team 4.
4.3 Checking the original dimensions Enter the original dimensions shown on the production data sheet in the grey boxes of checklist chap. 9.3. Check original dimension of suspended balance; for implementation see chap. 8.3 „Regular Maintenance“ Enter all data (date, tester, results) in the first line under „Inspection before first use“ in the checklist (see chapter 9.
Accu operation: When the rechargeable battery is empty, appears on the balance’s display. Turn off balance and connect power supply unit; battery is charged. Once the battery has been fully charged the display will show the symbol. Insert rechargeable battery: Unscrew battery compartment in arrow direction. Remove batteries including battery mount from the device.
Connect cable of balance to battery cable as shown on image. Insert battery in the centre. Ensure that the cables are not kinked. Relock battery compartment.
4.6 Suspending the balance Condition The crane needs a safety bracket (1) that the unloaded suspended balance cannot fall down. If the safety bracket is missing or damaged, please contact the crane manufacturer in order to receive a hook with this safety equipment. Attach the suspended balance to the lower hook of a crane and close the safety bracket. The crane scale’s upper eyelet should rest in the saddle (2).
5. Operation 5.1 Safety instructions Risk of injury due to falling loads! DANGER Take great care when operating the crane and follow the general rules for crane operation. Check all parts (hook, carbines, rings, rope slings, cables, chains etc.) for excessive wear or damage If faults can be seen on the safety bracket of the crane hook or if it is missing completely, the scales must not be used. Work only with appropriate speed Always avoid vibrations and horizontal forces.
5.2 Loading the suspended balance For good weighing results observe the following, illustrations see next page: Only use load attachment devices which guarantee a one-spot suspension and where the scales can be suspended freely. Do not use too large load attachment devices which do not guarantee any onespot suspension. Do not use multiple suspensions. Do not pull or push the load or the loaded balance. Do not pull the hook horizontally. Loading the balance 1.
+ Always use suitable lifting tackle. Only use attachment devices which guarantee a one-point suspension and where the scales can be suspended freely. Do not use too large attachment devices which cannot guarantee a one-point suspension.
Do not push or pull Do not pull the hook horizontally Do not use multiple suspensions 24 HFA-BA-e-1511
5.3 Turn on/off Start-up Press . The display lights up and the balance carries out a selftest. As soon as the weight display appears, the instrument will be ready to weigh. Switching Off Press . 5.4 Set balance to zero In order to obtain optimal weighing results, reset to zero the balance before weighing. Unload the balance Press 5.5 , zero display as well as indicator ZERO will appear. Taring Attach initial load. Press until zero display appears.
5.6 Weighing Load the suspended balance. The weight value will be displayed at once. Overload warning Overloading exceeding the stated maximum load (max) of the balance, minus a possibly existing tare load, must be strictly avoided. This could cause damage to the balance. Exceeding the maximum load is indicated by the display „ol“ . Unload balance or reduce preload. 5.7 Switch-over weighing unit The next weighing unit kgNlb will be displayed after each press of the UNIT button.
5.8 Hold weighing value (Data-HOLD function) Once a stable weight value has been established, this can be fixed until deleted before the next weighing activity. Attach the material to be weighed To start the Hold function, press and the heaviest load of the last weighing activity will be displayed. The indicator above HOLD appears. The weighing value will be held in the display until it is deleted by 5.9 .
5.10 Weighing with tolerance range To ensure that your weight value is within a defined tolerance range, you can define an upper and a lower limit value of your choice using function “F3 chk“ (See chap. 6). During tolerance tests such as portioning or sorting the unit will indicate exceeded or undershot limits by emitting an optical or acoustic signal.
7. Acknowledge by 8. Press . again, the currently set upper limit value is displayed. The active digit is flashing. Press to select the digit to be amended. To change the selected (flashing) digit, press value is displayed. 9. Confirm entry by repeatedly until the desired , “Ck Hi“ will appear. 10. Press , the display used to set the audio signal “bEEP“ will appear. 11. Press , the current setting for the acoustic signal will be shown. 12.
5.11 Automatic switch-off function (auto-off) The automatic switch-off function allows you to set a period of time in the menu after that the balance will switch off automatically in stand-by mode. 6. Menu 6.1 Navigation in the menu: Call up menu Switch-on balance and during the selftest press The first function F0bk is displayed. Select menu item With help of Select setting Confirm selected menu item by pressing , the individual menu items can be selected one after the other. .
6.2 Overview Function F0 bk Display background illumination Available settings bk on Description Background illumination on bk off Background illumination off bk AU Background illumination switches on automatically when loaded or a button is pressed AZ 0.5d AZ 1d AZ 2d AZ 4d Ut lb Ut kg Ut N Ck Lo Automatic zero correction (auto-zero) on change of display, Selectable digits available 0.5d,1d, 2 d, 4 d. Ck Hi Upper limit value, input see chap. 5.
7. 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.
Press , “ULoAd“ will be displayed. Make sure that no loads apart from the lifting tackle are attached to the hook. Wait for stability display, then press . Either use the displayed adjustment weight or change by and , the currently enabled digit is flashing. (example) Press to select the digit to be amended. To change the selected (flashing) digit, press repeatedly until the desired value is displayed. Confirm by , „LoAd“ will be shown. Attach adjustment weight.
8. Linearization 8.1 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 monitoring of test resources, you can improve this by means of linearization. • • • • 34 Carrying out linearization is restricted to specialist staff possessing well acquainted with the workings of balance.
8.2 Carry out linearization Turn off balance and attach suitable lifting tackle. Turn on balance with the lifting tackle attached and press during self-test. The first function „F0bk“ is displayed. Press repeatedly until „F5CAL“ is displayed. Press , the last parameter set will be displayed. • „nonLi“ Adjustment of balance or • „LinE“ Linearisation of balance Select „LinE“ by Press , “LoAd 0“ will appear. Make sure that no loads apart from the lifting tackle are attached to the hook.
Attach second adjustment weight, wait for stability display Press , “LoAd 3“ (max load) will be displayed Attach third adjustment weight, wait for stability display Press , “PASS“ will be displayed Finally the balance will carry out a self-test, “Err19“ is briefly displayed (Ignore error message), then the balance returns automatically to weighing mode, the weight value is displayed and linearization has been completed successfully.
9. Cleaning, Maintenance and Disposal Risk of injury and risk of material damage! The suspended balance is part of the lifting gear! For a safe operation please observe the following: Danger Have carried out a regular maintenance by trained specialized 9.1 staff Carry out regular maintenance and servicing, see chap. 8.3. Have the parts exchanged only by trained specialized staff. If there arose discrepancies with the safety checklist, the balance must not more be put into operation.
9.2 Regular maintenance and care The regular 3-month maintenance may only be carried out by an expert with competent knowledge of working with suspended balances. Thereby the national regulations for prevention of accidents as well as the working, operation and safety regulations of the owner-operator. To check the dimensions only use suitable test devices. The regular 12-month maintenance must only be carried out by trained specialized staff (KERN customer service).
9.3 Checklist „regular maintenance“, (see chapter 9.2) Original dimensions suspended Serial no. …………………………… balance (You can find these data in the documentation enclosed with the balance.
Clearance k Max.
10. Enclosure 10.1 Checklist „Enhanced maintenance“ (General revision) The enhanced maintenance has to be carried out by a service partner authorized by KERN. Model ………………………………….. Suspended balance Serial no. ……………………………………………..
