KERN EWJ 300-3H Operating Manual
Precision balances
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- Operating instructions manual (77 pages)
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Summary of Contents for KERN EWJ 300-3H
- Page 1 KERN & Sohn GmbH Ziegelei 1 Phone: +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 manual Precision balances KERN EWJ Version 1.7 2019-06 EWJ-BA-e-1917...
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Page 2: Table Of Contents
KERN EWJ Version 1.7 2019-06 Operating manual Precision balance Contents Technical data ....................4 Appliance overview ..................7 Keyboard overview ........................9 Overview of display ........................10 Basic Information (General) ................ 11 Proper use ..........................11 Improper Use ..........................11 Warranty ........................... - Page 3 Servicing, maintenance, disposal .............. 37 10.1 Clean ............................37 10.2 Servicing, maintenance ......................37 10.3 Disposal ............................ 37 Error messages .................... 38 Instant help ....................39 Declaration of conformity ................40 EWJ-BA-e-1917...
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Page 4: Technical Data
1 Technical data KERN EWJ 300-3 EWJ 300-3H EWJ 3000-2 Readability (d) 0.001 g 0.001 g 0.01 g Weighing range (max) 300 g 300 g 3000 g Reproducibility 0.001g 0.001g 0.02 g Linearity ±0.003 g ±0.003 g ±0.05 g Smallest part weight for... - Page 5 KERN EWJ 600-2M EWJ 600-2SM Readability (d) 0.01 g 0,01 g Weighing range (max) 600 g 600 g Reproducibility 0.01 g 0,01 g Linearity ± 0,03 g ± 0,03 g Verification value (e) 100 mg 100 mg Verification class Minimum weight (min)
- Page 6 KERN EWJ 6000-1M EWJ 6000-1SM Readability (d) 0.1 g 0,1 g Weighing range (max) 6000 g 6000 g Reproducibility 0.1 g 0,1 g Linearity ± 0.3 g ± 0,3 g Verification value (e) Verification class Minimum weight (min) Smallest part weight for...
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Page 7: Appliance Overview
2 Appliance overview Example EWJ 300-3 / EWJ 600-2M: Windshield Weighing pan Levelling screw Bubble level Keyboard Display RS-232 Terminal power supply unit 10. Battery compartment 11. Transportation locks 12. Adjustment switch EWJ-BA-e-1917... - Page 8 Example EWJ 300-3H: 1. Windshield 2. Weighing pan 3. Display 4. Bubble level 5. Keyboard 6. Levelling screw 7. RS-232 8. USB 9. Terminal power supply unit 10. Battery compartment 11. Transportation locks 12. Adjustment switch EWJ-BA-e-1917...
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Page 9: Keyboard Overview
2.1 Keyboard overview Function Function in Menu Calculate weighing data via Exit menu / back to weighing mode. interface Switch-over weighing unit Scroll forward in menu Parts counting Delete total added memory Percent determination Start internal adjustment (longer pressing of the button) Taring Zeroing Take over selected setting... -
Page 10: Overview Of Display
2.2 Overview of display Zero indicator The displayed weighing value is a net weighing value Capacity display The bar graph display moves from the left to the right and proceeds equally to the weight loaded onto the weighing balance. Its full width is reached at maximum load. -
Page 11: Basic Information (General)
The balance may only be used according to the described conditions. Other areas of use must be released by KERN in writing. 3.3 Warranty Warranty claims shall be voided in case •... -
Page 12: Monitoring Of Test Resources
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. In KERN's accredited DKD calibration laboratory test weights and balances may be calibrated (return to the national standard) fast and at moderate cost. -
Page 13: Unpacking, Setup And Commissioning
6.2.1 Scope of delivery / serial accessories: • Balance, see chap. 2 • Mains adapter • Protective cover • Operating manual • Transport Securing • Glass wind shield only models EWJ 300-3, EWJ 300-3H, EWJ 600-2M, EWJ 600- EWJ-BA-e-1917... -
Page 14: Installing / Removing Transport Fittings
6.2.2 Installing / removing transport fittings The right place is decisive for the accuracy of the weighing results of high-resolution precision balances (see chap. 6.1). Turn the screw to the stop to the left Install weighing plate and wind shield if necessary. EWJ-BA-e-1917... - Page 15 Install weighing plate as follows: Models EWJ-300: Put holder weighing plate Screw screw with hexagon socket carefully and fix holder weighing plate so Attach the weighing plate EWJ-BA-e-1917...
- Page 16 Models EWJ-600-2M_EWJ-3000-2 Put holder weighing plate Screw screw with hexagon socket carefully and fix holder weighing plate so Attach the weighing plate EWJ-BA-e-1917...
- Page 17 Models EWJ-6000: Attach the weighing plate Ensure that the slanted side faces forward Screw screw with hexagon socket carefully and fix pan so Level balance with foot screws until the air bubble of the water balance is in the prescribed circle.
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Page 18: Mains Connection
Before connecting or disconnecting of additional devices (printer, PC) to the data interface, always disconnect the balance from the power supply. With your balance, only use accessories and peripheral devices by KERN, as they are ideally tuned to your balance. -
Page 19: Adjustment
6.7 Adjustment As the acceleration value due to gravity is not the same at every location on earth, each display unit with connected weighing plate 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 weighing system has not already been adjusted to the location in the factory). -
Page 20: Automatic Internal Adjustment
6.7.2 Automatic internal adjustment Automatic adjustment takes place: • when the balance is switched off and on. • at the end of a time interval After a set time interval (selectable 1 – 8 hrs.) in the menu (F5 HoUr, see chap. 8.3) the internal adjustment is automatically started. -
Page 21: Verification
6.8 Verification General introduction: According to EU directive 2014/31/EU 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 22: Operation
7 Operation 7.1 Start-up Press The display is shining and the motor noise of the loading system for the internal adjustment weight can be heard. The balance carries out a selftest, the maximum load and software version will also be shortly displayed, followed by the internal adjustment. During this process „CAL“... -
Page 23: Percent Determination
7.5 Weighing with tare Deposit empty weighing container. Wait for stability display, then press Zero display appears. The weight of the container is now internally saved. Weigh the material, the net weight will be indicated. • The balance is able to only store one taring value at a time. •... -
Page 24: Parts Counting
7.7 Parts counting Before the balance can count parts, it must know the average part weight (i.e. reference). Proceed by putting on a certain number of the parts to be counted. The balance determines the total weight and divides it by the number of parts, the so- called reference quantity. -
Page 25: Manual Totalizing
7.8 Manual totalizing With this function the individual weighing values are added into the summation memory by pressing and edited, when an optional printer is connected. The totalizing function is active at menu setting „SALE-Mode no“, see chap. 8.2. • For menu settings, see chapter 8.2: „F3 COM“... - Page 26 Place item to be weighed B, e.g. 200 g. Wait for stability display, then press . The weight value will be added to the summation memory and edited. Number of weighings, followed by the total weight will be displayed for 2 sec. After that the current weighing value is displayed. ...
- Page 27 2 sec and printed if an optional printer is connected. Delete total added memory: When display „Sum „Total““ appears, press . The data in the summation memory are deleted. Printout example (KERN YKB-01N): 100.00 g First weighing 100.00 g 200.00 g Second weighing 200.00 g...
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Page 28: Automatic Adding-Up
7.9 Automatic adding-up With this function the individual weighing values are automatically added into the summation memory when the balance is unloaded without pressing and edited, when an optional printer is connected. The totalizing function is active at menu setting „SALE-Mode no“, see chap. - Page 29 Remove the weighed good. The weighing value is added to the summation memory and printed if an optional printer is connected. Number of weighings, followed by the total weight will be displayed for 2 sec. Add more weighed goods as described before. Please note that the weighing system must be unloaded between the individual weighing procedures.
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Page 30: Menu
8 Menu 8.1 Navigation in the menu Call up menu Switch-on balance and during the selftest press The first menu item „F1 Unt„ is displayed. Select menu item With help of , the individual menu items can be selected one after the other. -
Page 31: Access To Technology Menu
8.2 Access to technology menu The access to the technology menu „tECH“ is locked by the key combination When on balances with type approval „tECH“ is displayed, the seal mark must be destroyed and the adjustment switch be actuated. Position of adjustment switch see chap. -
Page 32: Overview
8.3 Overview Factory settings are marked by *. Menu block Menu item Available settings / explanation F1 Unt Not documented Weighing Units Automatic background illumination on when EL AU* F2 bl weighing pate is loaded or key pressed. Display Background lighting of display is switched on EL on background permanently... - Page 33 Standard printer setting LP 50 Not documented Acknowledge selection by Eng* Standard stetting English. only displayed for setting „LP 50“ Not documented F4 SPD Verifiable models: Non-verifiable models: Display speed SPd L “Low” SPd 1 SPd n “Normal” SPd 2 SPd H “High”...
- Page 34 Technology menu, see chap. 8.2 tECH At „Pin“ display press subsequently the first menu block „P1 Lin“ will be displayed. P1 Lin Linearisation (not documented) P2 CAL Adjustment (not documented) XXXXX P3 Cnt Display internal resolution P4 A 2n A2 oFF Automatic zero point correction switched off 0.5d Automatic zero point correction (Autozero) by...
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Page 35: Interfaces
PC software (e.g. KERN balance connection). We recommend the USB interface set KERN DBS A02 (scope of supply: USB cable, driver CD, software balance connection.) For further information please go to KERN-Homepage (www.kern-sohn.com). -
Page 36: Printer Operation (Rs 232)
9.2 Printer operation (RS 232) Printout examples (KERN YKB-01N): 1. Menu setting F3 COM „P Prt“ Gross weight 300.00g Net weight 100.0g Percent determination PERC: 50.01 % Parts counting 20PCS 5.00027g 100g 49.99g Totalization 49.99g 49.99g 49.99g 149.99g 149.99g 299.97g 2. -
Page 37: Output Log (Continuous Output)
Spilled weighing goods must be removed immediately. 10.2 Servicing, maintenance The appliance may only be opened by trained service technicians who are authorized by KERN. Before opening, disconnect from power supply. 10.3 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. -
Page 38: Error Messages
11 Error messages Error Description Possible causes / message Remedy error Err lo Too small calibration weight Check calibration weight and calibrate Err hi Too big calibration weight again Err 3 Calibration error Err 4 Resetting range error Resetting range exceeding when switched on Reduce load of the weighing scale plate... -
Page 39: Instant Help
12 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 Possible cause The displayed weight does not glow. -
Page 40: Declaration Of Conformity
13 Declaration of conformity To view the current EC/EU Declaration of Conformity go to: www.kern-sohn.com/ce The scope of delivery for verified weighing balances (= conformity- rated weighing balances) includes a Declaration of Conformity. EWJ-BA-e-1917...
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