KERN & Sohn GmbH Ziegelei 1 D-72336 Balingen E-Mail: info@kern-sohn.com Tel: +49-[0]7433- 9933-0 Fax: +49-[0]7433-9933-149 Internet: www.kern-sohn.com Operating instructions Analytical balance KERN AEJ_N/AES_N Version 2.
GB KERN AEJ_N/AES_N Version 2.1 03/2013 Operating instructions Electronic analytical balance Contents 1 1.1 2 TECHNICAL DATA ............................................................................................. 5 Dimensions ............................................................................................................................... 7 APPLIANCE OVERVIEW ................................................................................... 8 2.1 Display and Keyboard Summary .....
7 ADJUSTMENT .................................................................................................. 18 7.1 Automatic adjustment using internal weight (AEJ only) .................................................... 19 7.2 Menu settings ......................................................................................................................... 21 7.2.1 P1.1 iCAL ........................................................................................................................
12 GLP/ISO LOG “P2 GLP“ .............................................................................. 49 13 OPERATION MODES ................................................................................... 53 13.1 Parts counting ........................................................................................................................ 54 13.2 Weighing with tolerance range ............................................................................................. 58 13.
1 Technical data KERN AEJ 100-4NM AEJ 200-4NM AEJ 200-5NM Readability (d) 0.1 mg 0.1 mg 0.01 mg / 0.1 mg Weighing range (max) 160 g 220 g 60 g – 220 g Minimum load (Min) 10 mg 10 mg 1 mg Verification value (e) 1 mg 1 mg 1 mg I I I 0.2 mg 0.2 mg 0.04 mg / 0.2 mg ± 0.3 mg ± 0.3 mg ± 0.1 mg / ± 0.3 mg Verification class Reproducibility Linearity Stabilization time 4 sec.
KERN AES 100-4N AES 200-4N Readability (d) 0.1 mg 0.1 mg Weighing range (max) 160 g 220 g Reproducibility 0.2 mg 0.2 mg ± 0.3 mg ± 0.3 mg 150 g (E2) 200 g (E2) Linearity Recommended adjusting weight not supplied (class) Stabilization time Warm-up time Weighing Units 4 sec.
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2 Appliance overview 1. Windshield 2. Weighing pan 3. Display 4. Keyboard 5. Levelling screw 6. Bubble level 7. Terminal power supply unit 8. RS232 interface 9.
2.1 Display and Keyboard Summary 1. 2. 3. 4. Key Stability display Zero indicator The non-calibrated value is given in brackets in calibrated scales.
2.1.
3 Basic instructions 3.1 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 balcance”, i.e. the material to be weighed is manually and carefully placed in the centre of the weighing pan. As soon as a stable weighing value is reached the weighing value can be read. 3.2 Improper Use Do not use balance for dynamic add-on weighing procedures, if small amounts of goods to be weighed are removed or added.
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. All language versions contain a non-binding translation. The original German is binding. 4.2 Personnel training The appliance may only be operated and maintained by trained personnel. 5 Transport and storage 5.
Prior to dispatch disconnect all cables and remove loose/mobile parts. Reattach possibly supplied transport securing devices. Secure all parts such as the glass wind screen, the weighing platform, power unit etc. against shifting and damage.
AEJ_N/AES_N-BA-e-1321
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.
6.2.2 Placing Installation of weighing plate Models with weighing pan ø 85mm Models with weighing pan ø 70mm Assemble all parts in the right order. Close gates. For instructions on how to connect the weighing scale to the power supply see chap. 6.3. Level balance with foot screws until the air bubble of the water balance is in the prescribed circle Check levelling regularly 6.3 Mains connection Power is supplied via the external mains adapter.
6.3.1 Turning On the Power Supply balance with power via the mains adapter. The display unit lights up and shown the software version. The weighing scale carries out a selftest and automatically moves into weighing mode. In the AEJ models an automatic adjustment takes place. 6.4 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.
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.
7.1 Automatic adjustment using internal weight (AEJ only) With the internal adjustment weight, the weighing accuracy can be checked and readjusted at any time. The automatic adjustment function is always enabled. You can start adjustment at any time by pressing the F-key 3 times. Temperature / time controlled adjustment is taking place: Automatic adjustment will be indicated 5 minutes in advance by “°C” (change of temperature ∆t 0.
Automatic adjustment is carried out: • When balance was disconnected from the mains. • When the temperature is changing The moment a change in temperature of 0.8°C is detected by the temperature sensor, the weighing scale will carry out a fully automatic adjustment. The °C symbol indicates the pending adjustment. • at the end of a time interval After the time interval (selectable from 1-12 hours) set in the menu (P1.
7.2 Menu settings Menu item “P1 CAL“ AEJ [adjustment] AES P1.1 iCAL Internal adjustment AEJ only P1.2 ECAL P1.1 ECAL External adjustment * P1.3 tCAL tCAL Adjustment test P1.4 ACAL Automatic adjustment AEJ * only P1.5 CALt Time controlled automatic adjustment AEJ * only P1.6 CALr P1.2 P1.3 CALr Printout adjustment log * = Locked in weighing scales with type approval certificate [Er 9 lock]. 7.2.1 P1.1 iCAL For automatic internal adjustment see chap. 7.
7.2.2 P1.2 ECAL - External adjustment (AES models) Carry out adjustment with the help of the recommended adjustment weight (see chapter 1 “Technical Specifications”). Observe stable environmental conditions. A warming up time (see chapter 1) is required for stabilization. Ensure that there are no objects on the weighing pan. Press PRINT-key, CAL will be shown. Wait until the weighed value for the required adjustment weight appears.
7.2.3 P1.3 tCAL – adjustment test AEJ models This function is applied to compare the internal adjustment weight with the saved value. The test is carried out automatically. The result is shown on the display and, if an optional printer is connected, a printout will be issued via the RS 232 interface. d + Return to weighing mode, see chap. 8.2.
AES models Here, deviation from the last adjustment is determined. This is only a check, i.e. no values are changed. + Return to weighing mode, see chap. 8.2.
7.2.4 P1.4 ACAL – Start criteria of the automatic internal adjustment (AEJ only) This function is applied to define the criteria required for starting up automatic adjustment. Settings: nonE Automatic adjustment disabled tEmp Start automatic Adjustment after change in temperature timE The start of time controlled automatic adjustment depends on the setting “P1.5 CALt” both Start automatic Adjustment is temperature and time dependent + Return to weighing mode, see chap. 8.2.
7.2.5 P1.5 CALt– time controlled automatic adjustment (AEJ only) This function is applied to define the time interval (selectable from 1-12 hours) for automatic adjustment. + Return to weighing mode, see chap. 8.2. This function is locked in weighing scales with type approval certificate.
7.2.6 P1.5 CALr– Enable/disable issue of adjustment protocol This function enables automatic log issue after each adjustment. These logs may be issued by using an optional printer. To define the content of the protocol go to menu item “P2 GLP”, s. chap. 12 no Adjustment protocol disabled YES Adjustment protocol enabled + Return to weighing mode, see chap. 8.2.
7.3 Verification General introduction: According to EU directive 2009/23EG 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. c) For official purposes d) For manufacturing final packages In cases of doubt, please contact your local trade in standard.
Position of the “official seals“: Position of the official seals 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. load) and compare with displayed value. • The reverification deadline has been exceeded.
8 Menu The menu is subdivided into seven menu blocks (P1 – P7). P1 CAL [adjustment] P1.1 iCAL | [internal adjustment] ALJ only P1.2 ECAL | [external adjustment] * P1.3 tCAL | [adjustment test] P1.4 ACAL | both/nonE/tenno/tinnE [automatic adjustment] ALJ only * P1.5 CALt | 1 h ÷ 12h [time setting for automatic adjustment] ALJ only * P1.6 CALr | YES/no [printout adjustment log] * = locked in devices with type approval certificate P2 GLP [good lab practice] P2.
P5 unit [weighing unit] P5.1 StUn | g/mg/ct/oz/ozt/dwt/t/mom/G [standard weighing unit, e.g. “g”] P5.2 mg | YES/no [mg - milligram] P5.3 Ct | YES/no [ct – carat] P5.4 oZ | YES/no [oz – ounce] P5.5 oZt | YES/no [ozt – Troy ounce] P5.6 dwt | YES/no [dwt – pennyweight] P5.7 t | YES/no [t – Tael] P5.8 nno | YES/no [mom - Momme] P5.9 Gr | YES/no [gr – Grain] P6 Func P6.
8.1 Navigation in the menu Call up menu In weighing mode press the F-key and the first menu block “P1 CAL” will appear. Select menu block Use the cursor key to select the individual menu blocks one by one. Use the cursor key to scroll down. Use the cursor key to scroll up. Select menu item Confirm the selected menu block by pressing the F-key. The first menu item of the selected menu block will be shown. Use the cursor key to select individual menu items one by one.
8.2 Exit menu / back to weighing mode. Press the TARE-key repeatedly until “SAVE?” is displayed. Any changes carried out are stored by pressing the PRINT key. To cancel changes, press the TARE key. Then the balance returns automatically into the weighing mode.
9 Weighing functions P6 func 9.1 Turn on/off balance The weighing scale will carry out a self-test after having been connected to the power supply and will then automatically go into weighing mode. To switch off pres the ON/OFF-key; “oFF“, will be displayed. The balance is now in stand-by mode No warming-up up time is required and it will be ready for operation immediately after switching on (Press ON/OFF-key). To switch-off the balance completely, separate balance from power supply. 9.
9.3 Standard weighing unit The weighing unit selected here remains even after disconnection from the mains. Press the UNIT-key repeatedly until the desired weighing unit is shown.
Confirm your selection by pressing the PRINT-key; weighing scale will return to menu. For returning to weighing mode with set weighing unit, see chap. 8.2. 9.4 Weighing units switch-over A weighing unit may be changed by pressing the UNIT-key several times: [g] → [mg] → [ct] → [oz] → [ozt] → [dwt] → [t] → [mom]→ [G] → [g] Note: In calibrated model selection is restricted to options [g] → [mg] → [ct]. 9.
9.6 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 at the balance bottom. • Suspend hook for underfloor weighing carefully and completely. • Place weighing balance over an opening. • Attach load to hook and carry out weighing procedure. Fig.
9.7 Selecting the operating mode To enable operating modes that are available to the user without having to go to the menu every time, go to the “P6 Func” menu. All activated operating modes can be called directly by pressing the key. If you wish to have several operating modes callable via the key, select ALL for a setting. For selection of accessible operating modes, see chap. 9.7.1. If you wish to access only one operating mode via the key, select it directly via the UNIT key.
Piece counting see chapter 13.1 For weighing with tolerance range, see chap. 13.2 For percentage determination, see chap. 13.3.1 For percentage determination, see chap. 13.3.2 For density determination solid matter, see chap. 13.5 For density determination fluids, see chap. 13.5 For pipette calibration, see chap. 13.6 For dispensing, see chap. 13.4 Confirm selection by pressing the PRINT-key; weighing scale will return to menu P6.1 FFun.
9.7.1 Selecting accessible operating modes Go there to select operating modes that subsequently will be selectable directly via the key. YES: turned on no: turned off Please repeat this sequence of operations for any other operating mode available. Confirm your selection by pressing the PRINT-key; balance will return to menu. Return to weighing mode, see chap. 8.2.
10 Balance settings “P3 rEAd” This menu block can be used to adapt the behaviour of the weighing scale to your requirements (such as ambient conditions, special weighing procedures). 10.1 Filter - adaptation to ambient conditions and weighing options Standard – normal ambient conditions Slow - The balance reacts slowly and in a robust manner, busy set-up location Fast - The balance reacts quickly and in a sensitive manner, quiet set-up location.
10.2 Rest position control display – Adaptation of weighing speed Standstill control fast + exact – quiet set-up location Rest position control fast Very quiet setup location Rest position control accurate Unbalanced installation site Confirm your selection by pressing the PRINT-key; weighing scale will return to menu. Return to weighing mode, see chap. 8.2.
10.3 Auto Zero This function is used to tare small variations in weight automatically. 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“. (e.g. slow flow of liquids from a container placed on the balance, evaporating processes). When apportioning involves small variations of weight, it is advisable to switch off this function.
10.4 Hide last decimal place Readability may be reduced by 1 digit on the weighing balances, as required. The last decimal place will be rounded and removed from the display. shows last decimal place hiding last decimal place last decimal place will only be shown for stable weighing values Confirm your selection by pressing the PRINT-key; weighing scale will return to menu. Return to weighing mode, see chap. 8.2.
10.5 Dispensing mode “RAPID” This setting is used to automatically adjust all parameters required for dispensing. In this way you do not have to call and change each menu item individually. Menu settings: RAPID = NO Standard settings for all weighing options and normal loads The weighing scale works according to the parameters set (P3.1 AUE, see chap. 10.1 / P3.2 CONF, see chap.10.2) RAPID = YES Parameters for dispensing are set automatically.
11 Further useful functions “P7 othEr“ Here, you can set the parameters that influence the operation of the balance, such as background lighting and key sounds. 11.1 Display background illumination On = background illumination switched on. Aut = Backlighting automatically switched off 10 seconds after achieving stable weighing value. OFF = background illumination switched off. Confirm your selection by pressing the PRINT-key; weighing scale will return to menu. Return to weighing mode, see chap. 8.
11.2 Acoustic signal for key operation On = acoustic signal turned on OFF = acoustic signal turned off Confirm your selection by pressing the PRINT-key; weighing scale will return to menu. Return to weighing mode, see chap. 8.2.
11.3 Print weighing settings All weighing scale settings are issued via the RS232 interface. Confirm your selection by pressing the PRINT-key; weighing scale will return to menu. Return to weighing mode, see chap. 8.2.
12 GLP/ISO log “P2 GLP“ Quality assurance systems require logs of weighing results as well as of correct adjustment of the balance stating date and time and balance identification. The easiest way is to have a printer connected. The content of the data output is determined in menu “P2 GLP“. All parameters set to “YES“ will be issued. Examples: P2 GLP P2.1 P2.2 P2.3 P2.4 P2.5 P2.6 P2.7 P2.8 uSr PrJ Ptin PdAt PuS PPrJ Pid PFrn | | | | | | | | max. 8 digits max.
Input via cursor keys • • Increasing the value for selected numeral or number • Selection of the number to be changed to the left (the respective active position flashes) • Selection of the number to be changed to the right (the respective active position flashes) Decreasing the value for selected numeral or number Overview data input / data output: Examples: Data input Data output 1. Upper case characters OP1_WILK 2.
• P2.2 PrJ – Enter project name Press the F-key; the first digit is flashing. Press the navigation keys to enter project name or number (max. 8 digits). Confirm settings by pressing the PRINT key. Weighing balance returns to menu. Press the UNIT-key and the next menu item “P2.3 Ptin”, will appear. • P2.
• P2.7 PId – Display serial number Press the F-key; current setting is flashing Use the UNIT-key to select among the following settings: no YES = Do not display date = Display date Confirm settings by pressing the PRINT key. Weighing balance returns to menu. Press the UNIT-key and the next menu item “P2.8 PFr” will appear. • P2.8 PFr – Frame Protocol Press the F-key; current setting is flashing.
13 Operation Modes • Weighing • Parts counting • Weighing with tolerance range • Percentage determination Reference defining by weighing • Percentage determination Numeric reference entry • Density determination solid matter • Density determination fluids • Pipette calibration • Dosing Calling operating modes (See also chap.9.7): The first function “F1 basic“ appears.
13.1 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 socalled reference quantity). Counting is then carried out on the basis of the calculated average piece weight. As a rule: The higher the reference quantity the higher the counting exactness.
Make reference Place as many pieces to add-up as required by the set reference piece number. Tare weighing container Confirm reference Remove reference weight. The balance is now in parts counting mode counting all units on the weighing pan.
• for selection ”optional reference piece number“ FrEE Select the place to be changed by pressing the F-key Select the digit by pressing the UNIT-key Confirm the entered reference piece number by pressing the PRINT-key “LoAd“ appears on the display. − Place as many counting parts on the balance as the set reference quantity requires, confirm by pressing the PRINT key.
• Return to weighing mode AEJ_N/AES_N-BA-e-1321 57
13.2 Weighing with tolerance range For weighing with tolerance ranges you can enter individual upper and lower limits. For tolerance controls such as dosaging, apportioning or sorting the scale will display violated upper or lower limits and show the tolerance tag. The triangular tolerance marker () in the upper part of the display shows whether the goods to be weighed are within the two tolerance limits.
• Call function The display for entering the lower limit value will appear. • Enter lower limit “Lo“ LQ 000.0000 g 008.8900 g Select the digit to be changed by pressing the F-key; each digit currently active will be flashing. Select the digit by pressing the UNIT-key Confirm by pressing the PRINT key. The display for entering the upper limit value will appear.
• Enter upper limit „Hi“ HKK 000.0000 g 009.5500 g Select the digit to be changed by pressing the F-key; each digit currently active will be flashing. Select the digit by pressing the UNIT key Confirm by pressing the PRINT key From now the balance is in checkweighing mode. Put on goods to be weighed, tolerance control is started With the help of the indicator check if the weighed goods are under, inside or over the default tolerance.
13.3 Percent determination Percent determination allows weight display in percent, in relation to a reference weight. The reference weight can either be determined by weighing (F4 PrcA) or entered numerically (F4 Prcb). 13.3.1 Determining the reference weight by weighing (function F4 PrcA) 100 % equals placing. Confirm by pressing the PRINT-key and the weight will be adopted as reference (100%). Remove reference weight; from here the weight of load is shown in percent based on the reference weight.
13.3.2 Numeric entry of reference weight (function F4 Prcb) Display for entering reference (= 100%) appears. Enter percentage of your choice, using cursor keys. Select the digit to be change by pressing the F-key; each time the currently active digit will be blinking. Select the digit by pressing the UNIT key Confirm by pressing the PRINT key From now on the weight of the load will be shown in percent based on the reference weight.
Return to weighing mode: Press repeatedly.
13.4 Dosing The weighing scale works at an increase display speed when dispensing mode is enabled (factory setting). However, please keep in mind that the weighing scale reacts very sensitively to ambient conditions. To disable the setting “P6 Func P6.1 FFun All” set function “F9 Fill” to “n”; see chap. 9.7 • Enabling dispensing mode Press repeatedly. Indicator displays the current dispensing mode. • Return to weighing mode Press repeatedly. Indicator expires.
13.5 Determining the density of solid matter and fluids For determining density we recommend that you work with the optionally available density kit KERN AES-A01N. This contains all the accessories and aids required for easy and precise density determination. For instructions please see the operating instructions enclosed with the density kit. Fig.: KERN AES-A01N No.
13.6 Pipette calibration 13.6.1 Entering parameters Prior to measuring you will have to enter the parameters below. Parameters Description Set n Set t Set P Set h V0 V1/2 V1 66 Number of measurements per test volume, selectable from 5 -15 measurements Test temperature, selectable from 0.4 – 25.5°C Air pressure test chamber, selectable from 800 – 1050 hPa Air humidity test chamber, selectable from 10 – 95 % For devices with a fixed volume, test volume equals nominal volume.
13.6.2 Carry out series of measurements for test volume V0 After entering all parameters (See chap. 13.6.1), position the weighing vessel, wait for the stability display to appear, then tare by pressing the TARE-key; P1 V0 will appear, followed by Place 1. 1. Dispense the test fluid (such as distilled water) into the weighing vessel of conduit “V0”. 2. Wait for stability display, then press the PRINT button. Place 2 followed by the current weight display will appear. 3.
13.6.3 Carry out series of measurements for test volume V1/2 Carry out the second series of measurements by following the same sequence of operations as the first, see chap. 13.6.2 1. Dispense the test fluid (such as distilled water) into the weighing vessel of conduit “V1/2” to be measured. 2. Wait for stability display, then press the PRINT button. Place 2 followed by the current weight display will appear. 3. Tare, by pressing the TARE-key.
13.6.4 Carry out series of measurements for test volume V1 Carry out the third series of measurements by following the same sequence of operations as the previous. 1. Dispense the test fluid (such as distilled water) into the weighing vessel of conduit “V1” to be measured. 2. Wait for stability display, then press the PRINT button. Place 2 followed by the current weight display will appear. 3. Tare, by pressing the TARE-key. 4.
Printout example “calibration data“: Vmin (V0) V1/2 Vmax (V1) Va Es Sr 70 The lower limit for the effective volume or 10 % of the nominal volume [µl], depending on whichever is the larger.
14 Data output RS 232 “P4 Print“ You can print weighing data automatically via the RS 232C interface or manually pressing the PRINT button via the interface according to the setting in the menu. This data exchange is asynchronous using ASCII - Code. The following conditions must be met to provide successful communication between the weighing system and the printer. • Use a suitable cable to connect the display unit to the interface of the printer.
14.
14.3 Menu settings “P4 PRINT“ Menu call “P4 PRINT“, see chap. 8.1. Menu overview Function P4.1 bAud Settings 2400 bit/s 4800 bit/s * 9600 bit/s 19200 bit/s no* P4.2 CntA YES no* P4.3 Cntb YES no* YES P4.4 rEPL P4.
1. Baud rate Confirm your selection by pressing the PRINT-key; weighing scale will return to menu. Return to weighing mode, see chap. 8.2.
2. Continuous output in standard weighing unit Confirm your selection by pressing the PRINT-key; balance will return to menu. Return to weighing mode, see chap. 8.2. 3. Continuous output in current weighing unit Confirm your selection by pressing the PRINT-key; weighing scale will return to menu. Return to weighing mode, see chap. 8.2.
4. Set manual or automatic output Confirm your selection by pressing the PRINT-key; balance will return to menu. Return to weighing mode, see chap. 8.2. 5. Set output stable/instable weighing values Confirm your selection by pressing the PRINT-key; balance will return to menu. Return to weighing mode, see chap. 8.2.
6.
14.4 Printout examples (KERN YKB-01N) Stable weighing value Instable weighing value 19.9994 g ? Negative weighed value - Positive weighing value Overload Percent determination 29.6343 g 19.9997 g 19.9994 g ^ 24.
14.5 Output log 14.5.1 Issue after pressing the PRINT ´button Stable or instable weighing values are sent according to menu settings “P4.5” PStb (see chap. 14.
14.5.2 PC controlled output Response message of balance after remote instruction was sent: XX_ Instruction: XX_A CR LF Instruction accepted; will be executed XX_ I CR LF Instruction received; impossible to carry out XX_^ CR LF Instruction received but time overflow error occurred XX_v CR LF Instruction received, but insufficient load XX_E CR LF Error during execution, timeout for stable weighing value exceeded Blank Stability display Blank Signs 8 - 16 17 18 - 20 21 Instruction: 1.
14.
15 Service, maintenance, disposal Before any maintenance, cleaning and repair work disconnect the appliance from the operating voltage. 15.1 Cleaning Please do not use aggressive cleaning agents (solvents or similar agents), but a cloth dampened with mild soap suds. Ensure that no liquid penetrates into the device. Polish with a dry soft cloth. Loose residue sample/powder can be removed carefully with a brush or manual vacuum cleaner. Spilled weighing goods must be removed immediately. 15.
16 Instant help Possible causes of errors: 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 displayed weight does not glow. • The balance is not switched on. • The mains supply connection has been interrupted (mains cable not plugged in/faulty). • Power supply interrupted.
16.1 Error messages Er1 Hi Initial weight error Er2 nuLL Value below allowed range Er3 FuL1 Value above allowed range Er4 FuL2 Weighing range exceeded Er5 rout Value outside allowed range e.g. tare value <= 0, Reference weight = 0 Er7 tout Disconnecting time too short Er8 outr Entry exceeding permitted range for instance during tolerance control: entry upper limit
17 Declaration of conformity KERN & Sohn GmbH D-72322 Balingen-Frommern Postfach 4052 E-Mail: info@kern-sohn.de Tel: 0049-[0]7433- 9933-0 Fax: 0049-[0]7433-9933-149 Internet: www.kern-sohn.
