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Service Manual
Electronic Crane Scales
KERN HFD
Version 1.0
02/2018
GB
KERN & Sohn GmbH
Ziegelei 1
D-72336 Balingen
E-Mail: [email protected]
Tel: +49-[0]7433- 9933-0
Fax: +49-[0]7433-9933-149
Internet: www.kern-sohn.com
HFD-SH-e-1810
Table of Contents
Related Manuals for KERN HFD
Summary of Contents for KERN HFD
- Page 1 KERN & Sohn GmbH Ziegelei 1 Tel: +49-[0]7433- 9933-0 D-72336 Balingen Fax: +49-[0]7433-9933-149 E-Mail: [email protected] Internet: www.kern-sohn.com Service Manual Electronic Crane Scales KERN HFD Version 1.0 02/2018 HFD-SH-e-1810...
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Page 2: Table Of Contents
KERN HFT Electronic Crane Scales Version 1.0 03/2018 Service manual Content Basic Information ..................... 4 Introdution ......................... 4 General Safety Instructions ..................5 Organizational measures ......................... 5 Environmental conditions ....................... 5 Proper use ............................5 Improper Use ............................. 6 Warranty ............................6 Safe working ............................. - Page 3 COM..............................32 14.3 DIS ..............................33 14.4 MCU ..............................34 14.5 POWER ............................34 Maintenance, Repair, Cleaning and Disposal ........... 35 15.1 Cleaning and Disposal ........................35 15.2 Regular maintenance and care ..................... 35 15.3 Regular maintenance: ........................37 HFD-SH-e-1810...
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Page 4: Basic Information
2 Introdution This service manual covers the HFD series and is edited for the authorized servicing personnel. Note all rights are reserved. Copying any part of this manual is prohibited without our permission. In this lineup it is an eco product, Therefore, it is not intended to represent the repair manual in detail, since the construction of the balance is very simple. -
Page 5: General Safety Instructions
Messrs. KERN & Sohn will not be liable under any circumstance. Messrs . KERN & Sohn cannot be held liable, if the crane scales are modified or used improperly and if damage is resulting from such use. -
Page 6: Improper Use
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... -
Page 7: Testing Upon Acceptance
In order to obtain exact results with the electronic balances, your balance must have reached the operating temperature (see warming up time chap. 1 see the HFD User manual). During this warming up time the balance must be connected to the power supply (mains, accumulator or battery). -
Page 8: The Crane Scales At A Glance
With the radio remote control, operation will be more comfortable yet. Overview Fig.1: Front view of balance Fig.2: Radio remote control (similar illustration) Upper shackle Antenna Display Keyboard Keyboard Lower shackle HFD-SH-e-1810... -
Page 9: Operating Elements
Description of function Record weight value (freeze) HOLD Shift decimal point (adjustment mode) Totalization Number selection to the right Exit menu TARE Taring Zeroing ON/OFF Turn on or off the balance HFD-SH-e-1810... -
Page 10: Radio Remote Control
Do not use on building site. Keep an eye on suspended loads. Do not exceed nominal load of crane scales. (example) The product conforms to the requirements of the German Equipment and Product Safety Act. HFD-SH-e-1810... -
Page 11: Commissioning
Safety Instructions"! of the HFD user manual 6.1 Unpacking Once delivered and unpacked, crane scales will not be taken back. The crane scales have been sealed by Messrs. KERN. SAFETY Load suspension devices are sealed by an adhesive tape. -
Page 12: Checking The Original Dimensions
Enter the original dimensions shown on the production data sheet in the grey fields of the checklist chap. Fehler! Verweisquelle konnte nicht gefunden werden.. in the HFD user manual Check original dimensions of crane balance; for implementation see chap.15.2 "Regular Maintenance"... - Page 13 HFD-SH-e-1810...
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Page 14: Suspending The Balance
If the safety bracket is missing or damaged, please contact the crane manufacturer in order to receive a hook with this safety equipment. Suspend the crane scales on the lower hook of a crane and close the safety bracket. The crane scale’s upper eyelet should rest in the saddle (2). HFD-SH-e-1810... -
Page 15: Operation
Do not exceed the nominal load of crane, crane scales or any kind of load attachment devices at the crane scales. (example) When weighing dangerous goods such as melted mass, radioactive material), observe the prescriptions for handling dangerous goods! HFD-SH-e-1810... -
Page 16: Loading The Crane Scales
4. Lift-off the load slowly. When the load is fixed by slings, ensure that the load is well balanced on both sides and that the slings are correctly positioned HFD-SH-e-1810... - Page 17 Only use load attachment devices which guarantee a one-point suspension and where the scales can be suspended freely. Do not use too large load attachment devices which cannot guarantee a one-point suspension. HFD-SH-e-1810...
- Page 18 Do not push or pull Do not pull the hook horizontally Do not use multiple suspensions HFD-SH-e-1810...
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Page 19: Menu
Change settings Use the TARE button to switch over into the available settings. Confirm setting Press the ZERO button, the balance returns into the menu. Exit menu / Return to weighing mode Press the M+ key. HFD-SH-e-1810... -
Page 20: Overview
8.2 Overview: Function Description Adjustment, see chap. 9 in the HFD user manual F0 cal F1 cap Set weighing balance 1500 capacity (max) / threer 3000 Three-range balance balance type 6000 12000 1500 single 3000 Single-range balance 6000 12000 1500... -
Page 21: Check Overload Records
20 min Weighing system will be turned off after 15 min. 30 min Weighing system will be turned off after 30 min. Check overload records, see chapter 8.3 in the HFD F10 ovEr XXXXXXX user manual 8.3 Check overload records ... -
Page 22: Adjustment
Press the ZERO button. After successful adjustment the balance carries out a selftest, then it automatically returns to weighing mode. An adjusting error or incorrect adjusting weight will be indicated by the error message; repeat adjustment procedure HFD-SH-e-1810... -
Page 23: General
If problem goes away, its source is probably in the Load cell. Check the wiring, connecter, load cell and mechanical components of the load cell. If problem persists, its source is probably in the PCB. Check the PCB voltages, connecters, cables and function programs HFD-SH-e-1810... -
Page 24: Testing Load Cell
Check each of the load cell wires to the load cell body. These readings should be greater than 1000MΩ or OL. If this reading is less than 1000 MΩ, then this load cell has leakage between the internal circuit and the load cell body or cable screen HFD-SH-e-1810... -
Page 25: Testing Pcb Voltages
The battery voltage below the 5.5VDC, replace the battery and install new 7.4V/5.2Ah battery. 2. Check the Battery Charging Voltage; Remove the battery connection terminals (Red and Black) from the battery. Connect the power and turn on the scale Voltage into the terminal minimum 6.5VDC HFD-SH-e-1810... -
Page 26: Replace Main Board
Install the new main board, plug all connector at last,After check anything，try to turn on the power ， if anything is OK，close the top cover，replace main board completely. HFD-SH-e-1810... -
Page 27: Battery Replacement
10.11 Battery Replacement Remove the screw securing the battery cover from the scale Open the battery cover from the housing. Take it out the battery from in side the housing. Remove the connectors from the battery terminals. Change to new battery. Connect the connectors to the battery terminals. -
Page 28: Trouble Shooting
Check the load cell Check the PCB Battery not charging Check the mains voltage Mains voltage is not correct. Adaptor damaged Check the adaptor Charging circuit failure Check the power connecters Battery failure and circuit Check the battery HFD-SH-e-1810... -
Page 29: Error Messages
Err 7 Increase the value to >0.5 d percentage" Check value for adjustment weight, see Err 8 Incorrect adjusting weight chap. 1 in the HFD user manual Draught/air movement The displayed weight is Table/floor vibrations Err 9 permanently changing ... - Page 30 Should other error messages occur, switch balance off and then on again. If the error message remains inform manufacturer. HFD-SH-e-1810...
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Page 31: Drawing
13 Drawing HFD-SH-e-1810... - Page 32 HFD-SH-e-1810...
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Page 33: Circuit Diagram
14 Circuit Diagram 14.1 AD 14.2 COM HFD-SH-e-1810... -
Page 34: Dis
14.3 DIS HFD-SH-e-1810... -
Page 35: Mcu
14.4 MCU 14.5 POWER HFD-SH-e-1810... -
Page 36: Maintenance, Repair, Cleaning And Disposal
The results of the maintenance must be written down in the checklist (chapter Fehler! Verweisquelle konnte nicht gefunden werden. in the HFD user manual). The additional results of the extended maintenance have to be entered in the checklist (chapter Fehler! Verweisquelle konnte nicht gefunden werden. - Page 37 The replaced spare parts also must be entered, (chapter Fehler! Verweisquelle konnte nicht gefunden werden. in the HFD user manual) HFD-SH-e-1810...
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Page 38: Regular Maintenance
If a dimension exceeds the admitted deviation from the original dimension (see checklist, chap. Fehler! Verweisquelle konnte nicht gefunden werden. in HFD user manual) or if other discrepancies have been found, the balance must be repaired at once by trained specialized staff (KERN customer service). - Page 39 HFD-SH-e-1810...