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Summary of Contents for KERN WTB-N
- Page 1 KERN & Sohn GmbH Ziegelei 1 Tel: +49-[0]7433- 9933-0 D-72336 Balingen Fax: +49-[0]7433-9933-149 E-Mail: info@kern-sohn.com Internet: www.kern-sohn.com Operating instructions Compact balance KERN WTB-N, WTB-NM Version 2.1 11/2014 WTB-N_WTB-NM-BA-e-1421...
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Page 2: Table Of Contents
KERN WTB-N, WTB-NM Version 2.1 11/2014 Operating instructions Compact balance Contents Technical data .................... 4 Dimensions..........................8 Appliance overview ..................9 Overview of display ........................ 9 Keyboard overview ....................... 11 Basic Information (General) ..............12 Proper use ..........................12 Improper Use ........................12 Warranty .......................... - Page 3 The menu ....................29 Navigation in the menu ......................29 Menu overview (locked in verifiable models) ............... 30 Set auto-OFF function ......................32 Multi-Tare function ....................... 33 Error messages ..................33 Instant help ....................34 Service, maintenance, disposal .............. 35 12.1 Cleaning ..........................
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Page 4: Technical Data
1 Technical data KERN 1K -4N 3K -3N 6K -3N Weighing range (max) 1.5 kg 3 kg 6 kg Readability (d) 0.2 g 0.5 g Reproducibility 0.2 g 0.5 g Linearity ±0.4 g ±1 g ±2 g Recommended adjustment 1500 g... - Page 5 KERN 10K -3N 30K -3N Weighing range (max) 15 kg 30 kg Readability (d) Reproducibility Linearity ±4 g ±10 g Recommended adjustment 15 kg 30 kg weight, not added (class) (M1) (M1) Stabilization time (typical) 2 sec. Units Warm-up time 30 min.
- Page 6 KERN 1K-4NM 3K-3NM 6K-3NM Weighing range (max) 1.5 kg 3 kg 6 kg Readability (d) 0.5g Reproducibility 0.5 g Linearity ±0.5 g ±1 g ±2 g Recommended adjustment 1500 g 3 kg 6 kg weight, not added (class) (M3) (M3)
- Page 7 KERN 10K-3NM 30K-2NM Weighing range (max) 15 kg 30 kg Readability (d) 10 g Reproducibility 10 g Linearity ±5 g ±10 g Recommended adjustment 15 kg 30 kg weight, not added (class) (M3) (M3) Stabilization time (typical) 2 sec. Units Warm-up time 30 min.
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Page 8: Dimensions
1.1 Dimensions WTB-N_WTB-NM-BA-e-1421... -
Page 9: Appliance Overview
2 Appliance overview 1 Weighing plate 2 Keyboard 3 Bubble level 4 Display 2.1 Overview of display Rear view: WTB-N_WTB-NM-BA-e-1421... - Page 10 Display Description Description Zeroing display Should the balance not display exactly zero despite empty scale pan, press the button. The balance will be set to zero after a short standby time. Stability display Scales are in a steady state Net weight display Net weight will be displayed Capacity display Triangle above the capacity indicator appears...
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Page 11: Keyboard Overview
2.2 Keyboard overview Description Function in menu ON/OFF-switch Turn on/off TARE button Tare balance Call up menu Weighing with Change to the next menu tolerance range item /parameter Zero setting key Set balance to zero Select menu item / parameter Switch-over units... -
Page 12: Basic Information (General)
In KERN’s accredited DKD calibration laboratory test weights and balances may be calibrated (return to the national standard) fast and at moderate cost. WTB-N_WTB-NM-BA-e-1421... -
Page 13: 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. All language versions contain a non-binding translation. The original German is binding. -
Page 14: Unpacking, Setup And Commissioning
6 Unpacking, Setup and Commissioning 6.1 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. Therefore, observe the following for the installation site: ... -
Page 15: Unpacking And Placing
6.2 Unpacking and placing Carefully remove the balance from the packaging, remove plastic cover and setup balance at the intended workstation. 1 Weighing pan 2 Locking screw 3 Carrier weighing plate 4 Shim 5 Display 6 Bubble level 7 Keyboard 8 Footscrews 9 Rechargeable battery compartment cover 10 Screws of battery compartment cover... - Page 16 Level balance with foot screws until the air bubble of the water balance is in the prescribed circle. 1 Rechargeable battery compartment 2 Mains port 3 Pressure compensation screw Pressure compensation screw: On the lower side of the balance there is a pressure compensation screw which Fasten the screw before cleaning the has to be opened for the weighing process.
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Page 17: Scope Of Delivery
Membrane for degree of protection IP65 6.2.1 Scope of delivery Serial accessories: Balance Weighing pan Carrier weighing plate Fastening screw of the carrier weighing plate Operating instructions Hexagonal socket wrench 6.3 Rechargeable battery operation (optional) The rechargeable battery is charged via the delivered power supply. - Page 18 Remove battery compartment cover and the foam pieces Connecting the rechargeable battery Watch the colours: Red on red ! Black on black! Insert the rechargeable battery in a manner that it cannot slip (fasten with a rubber foam mat) Ensure that the cables are not squeezed.
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Page 19: Mains Connection During Rechargeable Battery Operation
Close the rechargeable battery cover Rotate both levers (1) 90 degrees to the right If in the display the triangle appears above the capacity display , the rechargeable battery is nearly exhausted. Connect power pack, the rechargeable battery is loaded. Avoid excess pressure on the balance in order to avoid damaging it, particularly as it is supported by the weighing plate. -
Page 20: Initial Commissioning
The accuracy of the balance depends on the local acceleration of gravity. Strictly observe hints in chapter Adjustment. 6.5 Type of protection IP65 The KERN WTB meets the requirements for IP65 protection type. Suitable for a short-time contact with liquids. For cleaning use damp cloth. Dust-tight. 7 Adjustment... -
Page 21: Adjustment Non Verifiable Models
7.1.1 Adjustment non verifiable models Display Operation Start balance by pressing While the balance carries out a self test (00…- 99…), press and keep pressed until „F1 CAL“ appears on the display. Press in the display appears „UnLod“. Wait for the triangle above the stability symbol, then press , the value of the last- used adjustment weight is displayed. -
Page 22: Adjustment Of Verifiable Models
7.1.2 Adjustment of verifiable models In verified balances the menu is locked by the verification switch. To disable the access lock, destroy the seal and actuate the adjustment switch. Position of the adjustment switch see chapter 7.2.1 Attention: After destruction of the seal the balance must be re-verified by an authorised agency and a new verification wire/seal mark fitted before it can be reused for applications subject to verification. -
Page 23: Verification
7.2 Verification General introduction: According to EU directive 2009/23/EC balances must be officially verified if they are used as follows (legally controlled area): a) For commercial transactions if the price of goods is determined by weighing. b) For the production of medicines in pharmacies as well as for analyses in the medical and pharmaceutical laboratory. -
Page 24: Adjustment Switch And Seals
7.2.1 Adjustment switch and seals After a verification the balance is sealed at the indicated positions. Position of the official seals: 1. Verification wire fastening 2. Verification wire fastening 3. Self-destroying seal mark 4. Cover of adjustment switch 5. Adjustment switch 6. -
Page 25: Operation
8 Operation 8.1 Weighing Start balance by pressing The balance will carry out a self-test When the weight display shows "0.0" and the triangle symbol above the stability display appears, the scale is ready for weighing. However, you can reset the weighing scale to zero by pressing key. -
Page 26: Background Illumination
The tare weight is saved until it is deleted. Remove the load from the balance and press . The zero display appears and the triangle above the net weight symbol vanishes. Gross weight: Press as long as the weighing container and the object to be weighed are on the weighing plate. -
Page 27: Weighing With Tolerance Range
8.4 Weighing with tolerance range You can set an upper or lower limit when weighing with tolerance range and thus ensure that the weighed load remains exactly within the set tolerance limits. Settings: In weighing mode press for about 3 seconds, the display for entering the upper limit appears. - Page 28 Optical signals: The triangle above the "+" - or the "-" symbol indicates whether the sample weighed is within the tolerance range: Goods to be weighed above tolerance limit Goods to be weighed within tolerance range Goods to be weighed below tolerance limit Traffic light function: The indicator lights up in red, green and orange, depending on the area in which your sample is:...
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Page 29: The Menu
9 The menu 9.1 Navigation in the menu In verified balances the menu is locked by the verification switch. Switch on the scales by and during the balance’s self- test, press until "F1 CAL" is displayed. Use to change to the next menu item ... -
Page 30: Menu Overview (Locked In Verifiable Models)
9.2 Menu overview (locked in verifiable models) Menu item Function Adjustment process. 3000 Resolution 6000 Please do not change default setting dual 1.5 kg Max load 3 kg Do not change the default setting 6 kg 15 kg 25 kg 30 kg not documented 3 min... - Page 31 Multi-Tare function: 0 tare Multi-Tare function disabled P tare Multi-Tare function enabled Acoustic signal in tolerance weighing mode bEP 0 Acoustic signal turned off bEP 1 Acoustic signal when weighed material is within the tolerance range bEP 2 Acoustic signal when weighed material is outside the tolerance range Return to weighing mode WTB-N_WTB-NM-BA-e-1421...
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Page 32: Set Auto-Off Function
9.3 Set auto-OFF function Switch on the scales by and during the balance’s self- test, press until "F1 CAL" is displayed. Press repeatedly until „F5 oFF“ appears Select function using Use to change between the individual parameters ... -
Page 33: Multi-Tare Function
9.4 Multi-Tare function The scale has the ability to tare several times in a row. For this purpose, select the menu item "F8 tm" and set the parameter "P tare". 10 Error messages Display Description Remedy Zero range exceeded Unload the balance A/D converter outside range Unload the balance;... -
Page 34: Instant Help
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. Fault Possible cause The balance is not switched on. The displayed weight does not glow. -
Page 35: Service, Maintenance, Disposal
Spilled weighing goods must be removed immediately. 12.2 Service, maintenance The appliance may only be opened by trained service technicians who are authorized by KERN. Before opening, disconnect from power supply. 12.3 Disposal Disposal of packaging and appliance must be carried out by operator according to valid national or regional law of the location where the appliance is used.
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