KERN ALJ 160-4A Operating Manual
Analytical and precision balances
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Summary of Contents for KERN ALJ 160-4A
- Page 1 KERN & Sohn GmbH Ziegelei 1 Phone: +49-[0]7433- 9933-0 D-72336 Balingen Fax: +49-[0]7433-9933-149 email: info@kern-sohn.com Internet: www.kern-sohn.com Operating Manual Analytical and precision balances KERN ALJ/ALS/PLJ/PLS Version 3.5 10/2011 ALJ/ALS/PLJ/PLS-BA-e-1135...
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Page 2: Table Of Contents
Models with external weight (KERN ALS/PLS)............23 7.1.1 Adjustment with recommended adjustment weight (factory setting) ........23 7.1.2 Adjustment with weights of other nominal values ..............24 Models with internal weight (KERN ALJ/PLJ) ............26 7.2.1 Overwrite internal adjustment weight..................28 Verification ........................29 Basic Operation ................... 31 Underfloor weighing ....................32... - Page 3 Data output type .......................37 Baud rate ........................38 Auto Zero ........................39 Filter .........................41 Standstill control display ...................42 Setting the contrast of the display ................43 Display background illumination ................45 Automatic switch-off function „AUTO OFF“ in stand-by mode ........46 User menu ....................47 10.1 Parts counting ......................48 10.1.1...
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Page 4: Technical Data
1 Technical Data KERN ALJ 160-4A ALJ 250-4A ALJ 310-4A Weighing range (max) 160 g 250 g 310 g Readability (d) 0.1 mg 0.1 mg 0.1 mg Reproducibility 0.1 mg 0.1 mg 0.1 mg Linearity ± 0.3 mg ± 0.3 mg ±... - Page 5 KERN ALS 160-4A ALS 250-4A Weighing range (max) 160 g 250 g Readability (d) 0.1 mg 0.1 mg Reproducibility 0.1 mg 0.1 mg Linearity ± 0.3 mg ± 0.3 mg Stabilization time (typical) 4 sec. 4 sec. Minimum unit weight at >...
- Page 6 KERN PLJ 310-3F PLJ 420-3F PLJ 720-3A Weighing range (max) 310 g 420 g 720 g Readability (d) 0.001 g 0.001 g 0.001 g Reproducibility 0.001 g 0.001 g 0.001 g Linearity ± 0.003 g ± 0.003 g ± 0.002 g Stabilization time (typical) 3 sec.
- Page 7 KERN PLJ 1200-3A PLJ 1200-3DA PLJ 3100-2F Weighing range (max) 1200 g 720 g/1200 g 3100 g Readability (d) 0.001 g 0.001 g/0.01 g 0.01 g Reproducibility 0.001 g 0.001 g/0,01 g 0.01 g Linearity ± 0.003 g ± 0.003 g/0.03 g ±...
- Page 8 KERN PLJ 4200-2F PLJ 6200-2A PLJ 6200-2DA Weighing range (max) 4200 g 6200 g 4200 g /6200 g Readability (d) 0.01 g 0.01 g 0.01 g /0.1 g Reproducibility 0.02 g 0.01 g 0.01 g /0.1 g Linearity ± 0.04 g ±...
- Page 9 KERN PLS 310-3F PLS 420-3F PLS 510-3A 310 g 420 g 510 g Weighing range (max) 0.001 g 0.001 g 0.001 g Readability (d) 0.002 g 0.002 g 0.001 g Reproducibility ± 0.003 g ± 0.004 g ± 0.002 g Linearity 3 sec.
- Page 10 KERN PLS 720-3A PLS 1200-3A PLS 1200-3DA 720 g /1,200 g 720 g 1200 g Weighing range (max) 0.001 g /0.01 g 0.001 g 0.001 g Readability (d) 0.001 g /0.01 g 0.001 g 0.001 g Reproducibility ± 0.002 g / 0.02 g ±...
- Page 11 KERN PLS 3100-2F PLS 4200-2F PLS 4200-2A 3100 g 4200 g 4200 g Weighing range (max) 0.01 g 0.01 g 0.01 g Readability (d) 0.02 g 0.02 g 0.01 g Reproducibility ± 0.03 g ± 0.04 g ± 0.02 g Linearity 3 sec.
- Page 12 KERN PLS 6200-2A PLS 6200-2DA PLS 20000-1F 6200 g 4200 g/6200 g 20 kg Weighing range (max) 0.01 g 0.01 g/0.1 g 0.1 g Readability (d) 0.01 g 0.01 g/0.1 g 0.1 g Reproducibility ± 0.03 g ± 0.02 g / 0.2 g ±...
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Page 13: Explanation Of Graphical Symbols
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 14: Basic Safety Precautions
4 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. 4.2 Personnel training The appliance may only be operated and maintained by trained personnel. -
Page 15: 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 16: Unpacking / Erection
6.2 Unpacking / erection Carefully remove the balance from the packaging, remove plastic cover and setup balance at the intended workstation. 6.2.1 Placing Design layout of weighing balance: Models ALS/ALJ Models PLS/PLJ, d = 1 mg ALJ/ALS/PLJ/PLS-BA-e-1135... - Page 17 Models PLS/PLJ, d = 100 mg Models PLS/PLJ, d = 10 mg Level balance with foot screws until the air bubble of the water balance is in the prescribed circle. ALJ/ALS/PLJ/PLS-BA-e-1135...
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Page 18: Scope Of Delivery / Serial Accessories
6.2.2 Scope of delivery / serial accessories • Balance (See chpt. 6.2.1) • Mains power supply • Operating Manual 6.3 Appliance overview 6.3.1 Front side of the balance Cover windshield Bubble level Windshield LCD display Function keys Adjustable feet ALJ/ALS/PLJ/PLS-BA-e-1135... -
Page 19: Back And Bottom Side Of The Balance
6.3.2 Back and bottom side of the balance 1. Weighing plate 2. RS232C interface 3. Foot screws 4. Mains adapter connection 5. Housing screws (in models with four feet first screw out the two rear feet) 6. Underfloor weighing device ALJ/ALS/PLJ/PLS-BA-e-1135... -
Page 20: Controls
6.4 Controls 6.4.1 Overview of display 6.4.2 Keyboard overview Designation Short key pressing longtime pressed button until the acoustic signal gets mute • Call-up application • Call-up user menu MENU button/ menu • Exit user menu • Select menu items – •... -
Page 21: Connect And Switch-On Power Supply
6.5 Connect and switch-on power supply Before connecting the mains adapter check if the printed voltage value is the same as the local supply voltage. Only use KERN original mains adapter. Using other makes requires consent by KERN. Plug-in mains adapter in mains adapter bushing of the balance and connect to the mains. -
Page 22: Connection Of Peripheral Devices
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 23: Models With External Weight (Kern Als/Pls)
7.1 Models with external weight (KERN ALS/PLS) The adjustment is locked for verified balances. 7.1.1 Adjustment with recommended adjustment weight (factory setting) Weight value of the required adjustment weight see chpt. 1 “Technical specifications“: Ensure that there are no objects on the weighing plate. Press the CAL key ... -
Page 24: Adjustment With Weights Of Other Nominal Values
Weights of different nominal values may be used for adjustment but are not optimal for technical measuring, possible adjustment points see table 1. Info about adjustment weights can be found on the Internet at: http://www.kern- sohn.com Ensure that there are no objects on the weighing plate. Press the CAL button and keep it pressed until the acoustic signal gets mute. - Page 25 Recommended Other measurement-technically not optimal nominal Model adjustment weight values for adjustment (see chap. 7.1.2) (see chap. 7.1.1). A-models ALJ 160-4A ALJ 250-4A ALS 160-4A 150g 100g ALS 250-4A 200g 100g PLJ-720-3A PLJ 1200-3A PLJ 1200-3DA PLJ 6200-2A PLJ 6200-2DA...
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Page 26: Models With Internal Weight (Kern Alj/Plj)
7.2 Models with internal weight (KERN ALJ/PLJ) For non verified balances four adjustment possibilities are available in the menu. Menu settings In weighing mode press the MENU button and keep it pressed until the acoustic signal gets mute. The first menu item „units“ is displayed. - Page 27 When the I-CAL function is activated, the internal adjustment is I-CAL started only by pressing the CAL button. Before pressing CAL ensure that there are no objects on the weighing plate. At the models with internal adjustment weight the adjustment with E-CAL external weight is not recommended.
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Page 28: Overwrite Internal Adjustment Weight
7.2.1 Overwrite internal adjustment weight Overwriting is restricted to specialist staff possessing well acquainted with the workings of weighing scales. Press the MENU button and keep it pressed until the acoustic signal gets mute. Press the MENU button as often as required until „CAlib“ appears ... -
Page 29: Verification
7.3 Verification General introduction: According to EU directive 90/384/EEC balances must be 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 30 Position of the seal mark (models PLJ) Balances with obligation to verify must be taken out of operation if: The weighing result of the balance is outside the error limit. Therefore, in regular intervals load balance with known test weight (ca. 1/3 of the max.
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Page 31: Basic Operation
8 Basic Operation In stand-by mode (see chap. 6.5) press ON/OFF button. Start-up The balance is ready for weighing when the weight display appears. Switching Off Press ON/OFF button, the balance returns to the stand-by mode (see chap. 6.5). Place goods to be weighed on balance Simple weighing ... -
Page 32: Underfloor Weighing
8.1 Underfloor weighing Objects unsuitable for placing on the weighing scale due to size or shape may be weighed with the help of the flush-mounted platform. Proceed as follows: • Switch off the balance • Open closing cover (1) at the balance bottom. •... -
Page 33: User Menu
9 User menu The settings of the balance can be changed in the user menu. This way, the balance can be adjusted to individual weighing requirements. By the factory the user menu has been set in a way that normally no more changes must be made, only at special conditions of use. - Page 34 Menu overview Menu item Display Selection Description Weighing unit Units Gramm Gram (see chap. 9.1) Carat * Carat Unze * Ounce Pound * Pound Pennyweight * PEnn Troy Unze * OuncEtr Grain * GrAin Tael Hongkong * tAEL Hon Tael Singapore * tAEL SGP Tael R.O.C.
- Page 35 Contrast of the display (see chap. 9.7) Contr 1-15 Select contrast Backlight (see chap. 9.8) Backlight on Backlight off Backlight automatically switched off 3 seconds after achieving stable weighing value. Changes Auto in weight or pressing of keys will automatically result in backlight switching on again.
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Page 36: Weighing Unit
9.1 Weighing unit According to requirements the balance can be switched-over into different units (in verified balances not all the units are available, see chap. 1 „Technical specifications). Selected weighing unit will be retained even after disconnection from the mains. ... -
Page 37: Data Output Type
9.2 Data output type In weighing mode press the MENU button and keep it pressed until the acoustic signal gets mute. Press MENU button Acknowledge using PRINT button, the current setting is displayed. Press the arrow keys to select desired setting. Scroll forward using MENU button Scroll backward using CAL button ... -
Page 38: Baud Rate
9.3 Baud rate In weighing mode press the MENU button and keep it pressed until the acoustic signal gets mute. Press MENU button repeatedly Acknowledge using PRINT button, the current setting is displayed. Press the arrow keys to select desired setting. Scroll forward using MENU button Scroll backward using CAL button ... -
Page 39: Auto Zero
9.4 Auto Zero Under this menu item the automatic zero point correction can be switched on or off. In switched-on-state the zero point is automatically corrected at drift or when dirty. Information: 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“... - Page 40 Press the arrow keys to select desired setting. Scroll forward using MENU button Scroll backward using CAL button Au0 OFF = Auto Zero switched off Au0 1 = Auto Zero range ± ½ digit Au0 2 = Auto Zero range ± 3 digits Au0 3 = Auto Zero range ±...
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Page 41: Filter
9.5 Filter This menu item allows the balance to be set according to specific ambient conditions and measuring purposes. In weighing mode press the MENU button and keep it pressed until the acoustic signal gets mute. Press MENU button repeatedly ... -
Page 42: Standstill Control Display
9.6 Standstill control display In weighing mode press the MENU button and keep it pressed until the acoustic signal gets mute. Press MENU button repeatedly Acknowledge using PRINT button, the current setting is displayed. Press the arrow keys to select desired setting. Scroll forward using MENU button Scroll backward using CAL button STAB 1: Standstill control fast –... -
Page 43: Setting The Contrast Of The Display
9.7 Setting the contrast of the display To set the contrast of the display you can choose between 15 values. In weighing mode press the MENU button and keep it pressed until the acoustic signal gets mute. Press MENU button repeatedly ... - Page 44 Take over selection using the PRINT button. Weighing balance returns to menu. Either make more settings in the menu or go back to weighing mode as follows. Press the MENU button and keep it pressed until the acoustic signal gets mute. The balance returns automatically into weighing mode.
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Page 45: Display Background Illumination
9.8 Display background illumination In weighing mode press the MENU button and keep it pressed until the acoustic signal gets mute. Press MENU button repeatedly Acknowledge using PRINT button, the current setting is displayed. Press the arrow keys to select desired setting. Scroll forward using MENU button Scroll backward using CAL button Background illumination on... -
Page 46: Automatic Switch-Off Function „Auto Off" In Stand-By Mode
9.9 Automatic switch-off function „AUTO OFF“ in stand-by mode In weighing mode press the MENU button and keep it pressed until the acoustic signal gets mute. Press MENU button repeatedly Acknowledge using PRINT button, the current setting is displayed. ... -
Page 47: User Menu
10 User menu The following operating modes may be enabled/disabled in the user menu: Count Parts counting Dens Density determination of solids/liquids Adding function Checkweighing Percent determination Perc Anim Animal weighing function M Load Peak value function ... -
Page 48: Parts Counting
10.1 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 49 If it was impossible to determine a reference due to instable goods to be weighed or an insufficient reference weight, the following display will appear during reference calculation. ERR04 = smallest counting weight not achieved Add SMP=if the placed quantity for a correct reference determination is too small, more parts must be placed as follows.
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Page 50: Switching Over Between Quantity And Weight Display
10.1.1 Switching over between quantity and weight display Place load on pan and read the number of pieces. Press MENU button, the total weight of the placed parts is displayed. Press the MENU button and keep it pressed until the acoustic signal gets mute, the average weight of a single piece is displayed. -
Page 51: Numeric Entering Of The Reference Weight
10.1.3 Numeric entering of the reference weight If you know the reference weight/piece you can enter this via the numeric keyboard. In weighing mode press MENU button. The first menu item „count“ is displayed. Acknowledge using PRINT button, the current reference quantity is displayed. ... -
Page 52: Density Determination (Hydrostatic Weighing)
10.2 Density determination (Hydrostatic weighing) Density is the relationship of weight [g] : volume [cm ]. The weight is determined by weighing the sample in air. The volume results from the ascending force [g] of the sample dipped in a liquid. The density [g/cm ] of that liquid is known (principle of Archimedes). - Page 53 The display for weight determination of the "sample in air“ appears. Confirm by pressing the PRINT button. If necessary, tare and put the sample. Wait until the weight display of the weighing balance has become stable and then press the PRINT button.
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Page 54: Determining Density Of Liquids
10.2.2 Determining density of liquids Fill sample liquid into a vessel, e.g. a pitcher. Heat sample liquid until temperature is constant. Prepare a glass sinker with known density In weighing mode press MENU button. The first menu item „count“ is displayed. ... - Page 55 The display for weight determination of the "glass sinker in air“ appears. Confirm by pressing the PRINT button. Tare if necessary and hook on the glass sinker centrically. Wait until the weight display of the weighing balance has become stable and then press the PRINT button.
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Page 56: Adding Function
10.3 Adding function This function can be used to automatically add any number of single weighings to a total. Press repeatedly the MENU button in weighing mode until „add“ will be displayed. Confirm by pressing the PRINT button The balance will tare automatically and then will change to the zero display ... - Page 57 The displayed value is added into the total adding memory, after that the balance will automatically tare anew and change over to the zero display Proceed in the same manner with the other weights To print out the total sum of the single weighings, press the CAL button ...
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Page 58: Checkweighing
10.4 Checkweighing An upper and a lower limit value can be established to ensure that the weighed goods are exactly within the established tolerance limits. The display [L], [ok] or [H] shows whether the goods to be weighed are within the two tolerance limits. - Page 59 Select the desired settings by pressing the MENU button Signal tone switched off Beep off Beep on Signal tone on, if weighed goods are within tolerance range Confirm by pressing the PRINT button. The balance is now in checkweighing mode. ...
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Page 60: Percent Determination
10.5 Percent determination Percent determination allows weight display in percent, in relation to a reference weight. 10.5.1 Entering the reference weight by weighing In weighing mode press MENU button. The first menu item „count“ is displayed. Press MENU button repeatedly ... -
Page 61: Numeric Entering Of The Reference Weight
10.5.2 Numeric entering of the reference weight In weighing mode press MENU button. The first menu item „count“ is displayed. Press MENU button repeatedly Acknowledge using PRINT button, the current setting is displayed. Using MENU button select „PErc n“ ... -
Page 62: Animal Weighing Function
10.6 Animal weighing function The animal weighing function can be applied for busy weighings. During a defined period the mean value of the weighing results is formed. The more unquiet the weighed item, the longer the period should be selected. ... - Page 63 In order to carry out an other measurement, press the ON/OFF button 1x Return to weighing mode: Press the ON/OFF key 2x ALJ/ALS/PLJ/PLS-BA-e-1135...
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Page 64: Peak Value Function
10.7 Peak value function This function displays the highest load value (peak value) of a weighing. The peak value remains in the display until it will be deleted. In weighing mode press MENU button. The first menu item „count“ is displayed. ... -
Page 65: Data Output Rs 232C
Baud rate optional from 1200 - 9600 Baud • For operation with interface faultless operation is only ensured with the correct KERN – interface cable (max. 2m) 11.2 Pin allocation of balance output plug Pin 2: Tx Signal Pin 3: Rx Signal... -
Page 66: Interface
11.3 Interface • Balance – PC 25-pole Balance • Balance – PC 9-pole Balance • Balance - printer Printer Balance Data input Busy Signal 11.4 Data transfer The data set consists of the following 14 characters: 1. Character sign -/ blank (weighing value) 2-9. -
Page 67: Format For Data Transmission
11.5 Format for data transmission At stable weight the format is transferred after pressing the PRINT button. Weighing mode (continuous output and remote control command) 1° 2° 3° 4° 5° 6° 7° 8° 9° 10° 11° 12° 13° 14° 15°r Character Weight Weighing unit... - Page 68 Percent determination (only remote control command) Percent value 1° 2° 3° 4° 5° 6° 7° 8° 9° 10° 11° 12° 13° 14° 15° 16° 17° 18° Blank Percent Blank Percent Weight value 1°. 2° 3° 4° 5° 6° 7° 8° 9°...
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Page 69: Remote Control Instructions
• Use a suitable cable to connect the weighing balance to the interface of the printer. Faultless operation requires an adequate KERN interface cable. • The Baud rates of balance and printer must agree, see chap. 9.3. - Page 70 Printout examples: Weighing mode/peak value function ………. 22.000 g Density determination d= 2.80066 g/cm3d Measuring value „Density“ Parts counting Weight: 300.000 g PMU: 3.000 g Number of pieces Weight Weight of placed pieces Average parts weight Percent determination Perc. 20 % Weight: 30.000 g Perc...
- Page 71 Animal weighing mode Time 6 Sec Ave.: 59.446 g Add-up mode 14.156 g 18.226 g 32.382 g ALJ/ALS/PLJ/PLS-BA-e-1135...
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Page 72: Error Messages
12 Error messages Weight value instable or zeroing not possible. Check the ERR01 environmental conditions. ERR02 Adjustment error, e.g. environmental conditions instable Adjustment error e.g. incorrect adjustment weight} ERR03 ERR04 Piece weight too small/instable Data transfer not possible, as weighing value is instable. Check ERR05 the environmental conditions. -
Page 73: Service, Maintenance, Disposal
Spilled weighing goods must be removed immediately. 13.2 Service, maintenance The appliance may only be opened by trained service technicians who are authorized by KERN. Before opening, disconnect from power supply. 13.3 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 74: Instant Help
14 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 balance is not switched on. The displayed weight does •... -
Page 75: Declaration Of Conformity
EN 61326-1 (2006) EN 61000-3-2 (2006) EN 61000-3-3 (1995) + A1 (2001) + A2 (2005) 2006/95/EC EN 61010-1 (2001) Date: 27.12.2008 Signature: Gottl. KERN & Sohn GmbH Management Gottl. KERN & Sohn GmbH, Ziegelei 1, D-72336 Balingen, Tel. +49-[0]7433/9933-0,Fax +49-[0]7433/9933-149 ALJ/ALS/PLJ/PLS-BA-e-1135...