KERN & Sohn GmbH Ziegelei 1 D-72336 Balingen E-Mail: info@kern-sohn.com Phone: +49-[0]7433- 9933-0 Fax: +49-[0]7433-9933-149 Internet: www.kern-sohn.com Operating instructions Precision balances KERN PBS/PBJ Version 1.
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GB KERN PBS/PBJ Version 1.4 03/2013 Operating instructions Precision balances Contents 1 Technical data ................................................................................................... 7 2 Declaration of conformity ............................................................................... 11 3 Appliance overview ......................................................................................... 12 3.1 Keyboard overview ...................................................
Adjustment ....................................................................................................... 27 8 8.1 Manual adjustment by CAL button ....................................................................27 8.2 Adjustment test ...................................................................................................31 8.3 Automatic adjustment by PSC (Perfect Self Calibration), only models PBJ ..35 8.4 Automatic adjustment by Clock-CAL (model PB only)....................
15 Switch-over weighing unit .......................................................................... 55 15.1 16 Percentage conversion.......................................................................................56 Application Functions ................................................................................. 57 16.1 Parts counting.....................................................................................................57 16.2 Control weighing and target weighing .....
1 Technical data KERN PBJ 420-3M PBJ 620-3M PBJ 1020-3 0.001 g 0.001 g 0.001 g Weighing range (max) 420 g 620 g 1020 g Minimum load (Min) 0.02 g 0.1 g - Verification value (e) 0.01 g 0.01 g - II I - 0.001 g 0.001 g 0.001 g ± 0.002 g ± 0.002 g ± 0.003 g 2.5 sec. 2.5 sec. 2.5 sec.
KERN PBJ 4200-2M PBJ 6200-2M PBJ 8200-1M Readability (d) 0.01 g 0.01 g 0.1 g Weighing range (max) 4.2 kg 6.2 kg 8.2 kg Minimum load (Min) 0.5 g 1g 5g Verification value (e) 0.1 g 0.1 g 1g II I II 0.01 g 0.01 g 0.08 g ± 0.02 g ± 0.02 g ± 0.1 g 4h 4h 2h 2.5 sec. 2.5 sec. 1.2 sec.
KERN PBS 420-3M PBS 620-3M PBS 1020-3 0.001 g 0.001 g 0.001 g Weighing range (max) 420 g 620 g 1020 g Minimum load (Min) 0.02 g 0.1 g - Verification value (e) 0.01 g 0.01 g - II I - 0.001 g 0.001 g 0.001 g ± 0.002 g ± 0.002 g ± 0.003 g 2.5 sec. 2.5 sec. 2.5 sec.
KERN PBS 4200-2M PBS 6200-2M PBS 8200-1M Readability (d) 0.01 g 0.01 g 0.1 g Weighing range (max) 4.2 kg 6.2 kg 8.2 kg Minimum load (Min) 0.5 g 1g 5g Verification value (e) 0.1 g 0.1 g 1g II I II 0.01 g 0.01 g 0.1 g ± 0.02 g ± 0.02 g ± 0.2 mg 4h 4h 2h Stabilization time 2.5 sec. 2.5 sec. 1.2 sec.
2 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.
3 Appliance overview Models with readability d = 0.001 g: Models with readability d ≥ 0.01 g: 1. 2. 3. 4. 5.
3.1 Keyboard overview In weighing mode: Button ON/OFF ESC CAL MENU TARE / UNIT PRINT *1 *3 13 Description Pressed once and released Keep pressed for about 3 seconds [ON/OFF] Switches between the operation and standby modes. Exit menu / Return to weighing mode [CAL] Invokes adjustment or menu selection. (*1) To display the menu element recently set.
In menu: Button Description ON/OFF ESC [ON/OFF] CAL MENU [CAL] Pressed once and released Keep pressed for about 3 seconds To return to a submenu or weighing mode. Return to weighing mode Moves to the next menu item. To display the menu element recently set. [TARE] To select or set the menu element recently displayed. No operation UNIT [UNIT] Entering numeric values: Increases the numeric value of flashing digit by 1.
3.1.2 Setting the decimal point when entering numerical values Entering a decimal point is necessary only for determining the specific gravity or if a multiplier shall be defined for the user-defined unit. 15 PRINT PRINT • Repeat actuating the button until the last digit flashes. Actuate the button again in order to call up the decimal point setting mode. The reversed triangle symbol ▼or the current decimal point flashes.
3.2 Overview of display Capacity display Display Designation Stability display Tare symbol Weight symbol [ ] Brackets →0← *1 Description Indicates that the weighed value is stable. (*1) It marks the currently selected element during menu element selection. Informs about setting an initial tare value. It is displayed during adjusting the measuring range. It indicates adjusting settings during menu selection. Flashes prior to start of automatic adjustment.
4 Basic Information (General) 4.1 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. 4.
4.4 Monitoring of Test Resources 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 with regard to the monitoring of balance test substances and the test weights required for this.
7 Unpacking, Setup and Commissioning 7.1 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: • Operate the device only indoors.
Scope of delivery / serial accessories: Models with readability d = 0.001 g: Models with readability d ≥ 0.
7.3 Placing Remove transport guard (models PBJ) To loosen the transport guard, turn both transport screws [1] anti-clockwise until they are locked (refer to sign [2]). For transport, turn both transport screws clockwise until they are locked. Mount safety hood Remove protective foil from adhesive strips and mount the safety hood so that it does not contact the weighing plate.
Levelling Turn in all three foot screws [1] as far as they go. Slightly press down the left front side of the scale and turn out the two front foot screws until the air bubble [3] in the spirit level [2] is within the prescribed circle. While continuing to exert a slight pressure to the front side of the scale, turn out the rear foot screw until the scale stands in stable position. Check levelling regularly.
Installation of weighing plate Models with readability d ≥ 0.
Models with readability = 0.001 g: Remove rubber plug as shown in picture. Attach wind guard and fix it by means of screws. Install weighing pan as per illustration. Note the correct position. Place the wind guard cover.
7.4 Mains connection Power is supplied via the external mains adapter. The stated voltage value must be the same as the local voltage. Only use original KERN mains adapters. Using other makes requires consent by KERN. Models PBJ: Prior to mains connection, loosen the transport guard screws at the scale according to the sign in any case, see chapter 7.3 7.5 Switch power supply on Supply power to balance via mains adapter. The display lights up and the balance carries out a selftest.
7.6 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. Terminal for external devices: 5 1 2 3 4 Interfaces at the balance back 1 RS-232C interface 2 DATA IO interface 3 AUX interface 4 DC-IN connection 5 Keyboard interface 7.
8 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.
If „I-CAL“ is not displayed, press to return into weighing mode and activate menu element 1, see menu overview. TARE / 2. Press the automatically. button and adjustment will take place 3. After successful adjustment the balance automatically returns to weighing mode. In case of an adjustment error (e.g. objects on the weighing plate) the display will show an error message, repeat adjustment.
8.1.2 Adjustment with external weight (factory setting models PBS) • Condition: menu setting „E-CAL“ / menu element 3. . • At verified balances, the adjustment is locked by a switch (except accuracy class I). To disable the access lock, destroy the seal and actuate the adjustment switch. Position of the adjustment switch see chap.
Wait until the zero display flashes. Remove adjustment weight and press . After successful adjustment the balance automatically returns to weighing mode. In case of an adjustment error (e.g. objects on the weighing plate) the display will show an error message, repeat adjustment. When an optional printer is connected and the GLP function is connected, the adjustment log will be edited, see chap. 8.5.
8.2 Adjustment test Activate function: Press 3 times in weighing mode. Menu group 1 „Adjustment“ is displayed, the indicator flashes. Acknowledge by , the current setting flashes. Adjustment with internal weight „I-CAL“ (only models PBJ, see chap. 8.1.1), Menu element 1 Adjustment test with internal weight „I-tESt“ (only models PBJ, see chap. 8.2.2), Menu element 2 Adjustment with external weight „E-CAL“ (see chap. 8.1.2), Menu element 3 Adjustment test with external weight „E-tESt“ (see chap. 8.2.
8.2.1 Adjustment test with external weight • Condition: Menu setting „E-tESt“ / Menu element 4 • At verified balances, the adjustment test is locked by a switch (except accuracy class I). To disable the access lock, destroy the seal and actuate the adjustment switch. Position of the adjustment switch see chap.
Remove adjustment weight and press . Wait for a short period of time, the difference to the previous adjustment is displayed. Either press , the d-value is reset to zero. Adjustment of balance by resetting. or press , the d-value is not reset to zero. No adjustment occurs.
8.2.2 Adjustment test with internal weight Condition: Menu setting „I-tESt“/ menu element 2 In weighing mode press . I-tESt is displayed. to return into weighing mode and If „i-tESt“ is not displayed, press activate menu element 2, see menu overview. Press , checking is automatic. Wait for a short period of time, the difference to the previous adjustment is displayed. Either Press , the d-value is reset to zero. Adjustment of balance by resetting.
8.3 Automatic adjustment by PSC (Perfect Self Calibration), only models PBJ The PSC function determines the ambient temperature of the scale at any time. If the tolerance groups are exceed upwards or downwards, this is signalled and the necessary adjustment is carried out fully automatically. This will ensure that the scale is ready at any time. Activate function: Press 3 times in weighing mode. Menu group 1 „Adjustment“ is displayed, the indicator flashes.
• • • The flashing weight symbol signals that automatic adjustment is imminent. In order to avoid that adjustment is started possibly during a series of measurements, actuate as soon as the weight symbol flashes. This will interrupt automatic adjustment. If the PSC function has not been activated, the operator has to adjust by means of an internal adjustment weight (chapter 8.1.1) as soon as the weight symbol flashes. 8.
Setting the time for Clock-CAL: Example „ACALt1“ to 12:00 p.m.. Press 3 times in weighing mode. Menu group 1 „Adjustment“ is displayed, the indicator flashes. Acknowledge by Press , the current setting flashes. several times until „t“ flashes. Acknowledge by , the first time „tCAL t1“ (menu element 7) is displayed. Acknowledge by , the current setting is displayed (the active digit flashes). Carry out the desired setting using navigation buttons (see chapter 3.1.1 „Numeric input“).
8.5 ISO/GLP log Quality assurance systems require printouts 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. Make sure that the communication parameter of balance and printer are the same. Communication parameter, see chap. 17.4 8.5.1 Setting of adjustment protocol and scale identification number Actuate in weighing mode until „S“ flashes. Acknowledge with Press .
Acknowledge selection by . Return to menu by Use . to invoke menu element 70 Acknowledge by , the currently set scale identification number is displayed (the active digit flashes). Use the navigation buttons and enter a 4-digit number between„0000“ and „9999“eingeben (see chapter 3.1.1 „Numerical entry“). Acknowledge with . Back to weighing mode press 39 again or for 3 s.
9 Verification General introduction: According to EU directive 90/384/EEC or 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.
10 Basic Operation 10.1 Switch on off balance Start-up: 1. After connection to the power supply the balance displays . For switching on, press , the scale carries out a segment test and starts automatically in weighing mode. 2. If the scale is in standby mode, press . The scale is ready for service immediately without heating up time. Switching off: 1. Press ; the balance changes into standby mode, that means that the balance is now in state ready-foroperation.. 2.
10.2 Simple weighing In order to obtain exact weighing results, your balance must have reached the operating temperature (see warming up time chap. 1). Wait for zero display, reset to zero using Place goods to be weighed on balance. Wait until the stability display appears ( ). Read weighing result. .
10.3 Taring The dead weight of any weighing container may be tared away by pressing a button, so that the following weighing procedures show the net weight of the goods to be weighed. Put weighing container on the weighing pan. Wait until the stability display appears ( ), then press The weight of the container is now internally saved. . Weigh the material. Wait until the stability display appears ( ). Read net weight.
10.4 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. • Place weighing balance over an opening. • Attach load to hook and carry out weighing procedure. ! CAUTION • Always ensure that all suspended objects are stable enough to hold the desired goods to be weighed safely (danger of breaking).
11 The menu 11.1 Navigation in the menu The menu consists of 7 groups and 4 levels. The configuration of the menu shows this structure where access to the required functions is facilitated by the numbering of the relevant menu elements. For navigation in the menu please use the enclosed menu is displayed. For navigation in the menu the symbol is displayed. Call function: Press 3 times in weighing mode. The first menu group „Adjustment“ is displayed, the indicator Select the required menu group by .
Menu group Flashing symbol 1 Description Adjustment 2 Analog display Capacity display, control and target weighing 3 E Installation environment and taring 4 A Application measurements and automatic output 5 U Conversion of units and specific weight measurement 6 S Setting of time and generation of an adjustment data set 7 Communication with external devices Making settings: As an example, the condition for evaluating the stability of 1 count (menu element 27) to 4 counts (menu element
Press , „Eb-1“ (menu element 27 ) is displayed. The stability display ( ) lights if „Eb-1“ is the current setting. Repeatedly press , until „Eb-4“ (menu element 29 ) is displayed. Save by . „SET“ followed by the current setting „Eb-4“ is displayed, characterized by the stability display ( ). Back to menu or onto weighing mode: Actuate for a short time, back to menu. Actuate for a long time, back to weighing mode.
11.2 Useful functions 11.2.1 Recall of last menu This function is useful if an application requires frequent changes at a certain menu element. CAL In weighing mode or when selecting the menu, keep the MENU button pressed for approx. 3 seconds. Then the menu element is displayed which has been changed or set lastly. 11.2.2 Resetting the menu This function is used to reset all settings in the menu to default setting. Default settings are marked by “#’” in the menu overview.
11.3 Menu Lock Locking the access to the menu: Connect scale to power supply. During the off display, keep appears. pressed until „Locked“ Menu access is rejected now and the message „Locked“ appears as soon as the operator tries to select a menu. Canceling the access lock: Disconnect scale from power supply. Wait for 10 seconds, then re-connect scale. During the off display, keep appears.
12 Set the installed clock 12.1 Date Select menu element 63, see chap. 11.1 Actuate in weighing mode until „S“ flashes. Acknowledge with Press Press Press . several times until „d“ flashes. again, the current date is displayed. Change by means of navigation buttons (see chapter 3.1.1 „Numerical entry“). Confirm input by . Either Return to weighing mode using or Press Press to go to date format setting , the current set format is displayed.
is used to select among the following formats Y.m.d. Menu element 63a d.m.Y. Menu element 63b m.d.Y. Menu element 63c Confirm input by . or Back to weighing mode - press 12.2 repeatedly or for 3 s. • The installed clock will carry out the corrections automatically for a leap year. • If the button is actuated to complete date setting, the seconds are set to zero If the date is set after the time, the second value is thus not correct.
12.3 Setting the display for the standby mode Define the items which shall be displayed in standby mode. Select menu element 65 if the time shall be displayed, see chapter 11.1 Select menu element 66 is the date shall be displayed, see chapter 11.1 Select menu element 67 if neither the time nor the date shall be displayed, see chapter 11.1 If the time is displayed in standby mode, you have the following functions available • Display of seconds Using • you can activate display/hiding of seconds.
13 Functions for adaptation to ambient conditions 13.1 Stability and reaction (average value) Exists the possibility to tune the stability of the display and the degree of reaction of the balance to the requirements of certain applications or the installation environment. There is a possibility of selection among five operating modes.
13.2 Stability Detection Band (up to 8 counts for verifiable, up to 64 counts for non verifiable models) The band makes it possible to select conditions at which the balance should be considered as stable. If „1 count” is selected, and the reading (within counting the readings) remains constant, the balance is considered as stable and the stability display is shown. The stability detection band can be set from 2 to 64 counts.
15 Switch-over weighing unit Press the units. UNIT button several times to switch over the display between the activated The default setting provides the following options: [g] → [%] → [PCS] → [%] Other settings must be activated in the menu as follows: Menu overview No. 54 to 62 : (Example) CAL MENU Press button to switch over between the units. Save the selected unit using TARE / button „SET“ appears shortly. The unit has been accepted.
15.1 Percentage conversion UNIT In weighing mode, press the key repeatedly until the „%” symbol will be seen on the display. Setting 100% of the reference value: Press the TARE / key to tare the balance. Put the reference sample which represents 100% value. This value must correspond to 100 or more counts in „g” unit. When the stabilisation display once. appears, press the CAL MENU key at „SET“ appears shortly. The reference sample weight will be shown as 100%.
16 Application Functions 16.1 Parts counting With parts counting you can either count parts into a container or remove parts from a container. To count a greater number of parts the average weight per part has to be determined with a small quantity (reference quantity). The larger the reference quantity, the higher the counting exactness. High reference must be selected for small parts or parts with considerably different sizes.
16.2 Control weighing and target weighing 16.2.1 Control weighing (comparator) display type 1 It is the most suitable method which makes it possible to assess weighing courses or errors on the basis of the sample weight. Select the menu element 15 in the menu overview. Display elements used The upper threshold value, indicated with the upper triangle symbol, is defined with the menu element 16. The lower threshold value, indicated with the lower triangle symbol, is defined with the menu element 17.
16.2.3 Target weighing mode This mode is used for weighing constant liquid quantities or for assessment of missing quantities or excess quantities. The target value is the numeric value which corresponds to the nominal quantity of the used unit. The target value is a numerical value which corresponds to quantity of the set unit to be used for weighing. The target value on the analogue display is presented as the centre line. The limit values are indicated with the triangle symbols.
16.3 Density determination 16.3.1 Specific measurement of solid weight In the case of specific measurement of solid weights, the sample (solid) weight is measured in air as well as in the liquid with known density and the sample density is calculated on the basis of that results. The ▼ symbol presents the solid density on this balance. Density determination with the help of the flush-mounted platform facility is described in the following.
16.3.2 Table of temperatures and densities Temperatur Density p [g/cm3] e [°C] 61 Water Ethyl Alcohol Methyl Alcohol 10 0.9997 0.7978 0.8009 11 0.9996 0.7969 0.8000 12 0.9995 0.7961 0.7991 13 0.9994 0.7953 0.7982 14 0.9993 0.7944 0.7972 15 0.9991 0.7935 0.7963 16 0.9990 0.7927 0.7954 17 0.9988 0.7918 0.7945 18 0.9986 0.7909 0.7935 19 0.9984 0.7901 0.7926 20 0.9982 0.7893 0.7917 21 0.9980 0.7884 0.7907 22 0.9978 0.7876 0.7898 23 0.9976 0.7867 0.
16.3.3 Specific measurement of liquid weight In the case of specific measurement of liquid weight, the weight of reference solid with known volume is measured in air and the liquid to be tested. The specific liquid weight is calculated on the basis of those both values. The display unit for the specific liquid weight is „d”. Density determination becomes even easier when an optional set for density determination is applied.
16.5 Auto Print function (models with non-verifiable setting only) Using the Auto Print function ensures automatic data printing without necessity to PRINT press the button for each single measurement. If the function is activated, the (Auto-Print) symbol is displayed. It is possible to select from six types of automatic printing. Information concerning setting the zero range can be found in chapter 11.7 Printing whilst loading: Select the menu element 42 in the menu overview.
16.6 Automatic zero setting (models with non-verifiable setting only) If the displayed value is within the zero range and the stability display lights up, zero setting occurs automatically. The zero symbol appears. To switch-on the zero setting function, select menu symbol 41 16.7 Zero range The „zero range“ is used as a reference value, whether a sample was placed or not. To determine the zero range, select the menu element 48 . 16.
16.9 Formulation mode This mode is used for convenient weighing of individual recipe components. PRINT Weights of each component are displayed and saved after each pressing the button. The weights of those component are sent with the RS-232C or DATA I/O interface, and the display is automatically zeroed to weigh the next component. When all components are weighed, their weights are added up and the total weight is displayed. This value output is edited by the ON/OFF ESC button.
16.10 Automatic saving and zeroing This function is used for weighing large number of single samples. If the function is activated, the automatic saving and zeroing symbol is illuminated. Select the menu element 52 in the menu overview. TARE / • Place the container to be weighed on the balance and press the button when the automatic saving and zeroing function is in the stand-by mode. (The automatic saving and zeroing symbol and mode symbol are illuminated.) The balance will be zeroed. • button.
16.11 Animal weighing (only possible with non verifiable setting) This function is used for weighing animals. The animal symbol the animal weighing mode is active. is displayed when Select the menu element 53 in the menu overview. TARE / • Place the weighing container on the scale pan and press the button. Note: When the weighing container is placed on the scale pan, data output is possible. It is not a fault. This no malfunction. • Place an animal on the scale pan.
17 Data output 17.1 Personal Computer - RS-232C 17.1.1 Connecting the Cable ATTENTION: By using the RS-232C/AUX interface of the PBS/PBJ type balances it is also possible to output other signals than RS-232C ones. Incorrect connection of those signal cables may lead to the personal computer or balance failure. Therefore, make sure that the suitable and correctly connected cable provides communication between the balance and computer.
17.2 Data Formats The following explanations refer to the case when the menu element 77 (EB type format) is selected. Explanations concerning other formats are included in the data of computers compatible with the suitable data formats. Note: The mark indicates the space code, and indicates the limiter code. 1. For measuring values: First sign Minus: '−' Not minus: space from 2. to 11. sign: Numerical values or „[”, ”]” are right justified.
17.3 Using codes of commands Note: Incorrect setting of communication parameters results in displaying the communication error „ComErr”. 1. Commands ending with a digit, letter or symbol different than [=]: commands to the balance must be transmitted with a limiter for each command code. Example 1: PRINT ... The same process as after pressing the button. PRINT 2. Commands ending with the [=] sign: Digits must be transmitted with a limiter to the balance. Example 2: TIME=1234 ..
Notes: • If 0 is at the beginning of the four-position number, the setting is finished at this point, and the menu selection is finished. • The result of such a command depends on the balance type. Example 6: #=2.56 Example 7: #=12.345.67 A computer makes it possible to determine the specified presentation way of numbers for processes of weighing and displaying on the balance. In the case of commands from examples 6 and 7, the values of [#2.56] and [#12.345.67] are displayed on the balance.
(ii) Commands concerning user buttons POWER Q MENU TARE T UNIT PRINT POWER* MENU+ UNIT+ PRINT+ Corresponds to the Corresponds to the Corresponds to the Corresponds to the Corresponds to the Corresponds to the Corresponds to the ON/OFF ESC ON/OFF ESC button. button. CAL MENU ON/OFF ESC button. button. CAL MENU UNIT PRINT button. button. button.
(v) Reading commands for set values TARGET LIMIT G.LO G.UP L.LO L.UP UW G/PCS CALWIT ACALT1 ACALT2 ACALT3 P.TARE ZRNG USER VOL DENSE ITIME Readout of the set target value. Readout of the set limit value. Readout of the set lower limit value on the display of the check weighing 1. Readout of the set upper limit value on the display of the check weighing 1. Readout of the set lower limit value on the display of the check weighing 2. Readout of the set upper limit value on the display of the check weighing 2.
(vii) Commands of special functions CAL C18 LOCK RELEASE TIME ADJCLK RSTMN MENU= { } [@] Calls up measuring range calibration mode. Calls up measuring range calibration mode. Sets menu lockout. Releases menu lockout. Reads date and time. Carries out correction by ± 30 seconds. Resetting the menu Makes it possible to call up any menu. Return message. Return message. Switches over to the multipoint connection mode. (@ for lower case letters) 5.
17.4 User Settings 17.4.1 Overview This menu is used to determine technical data of communication between the balance and a computer or electronic printer. Note: This menu applies both to the RS-232C interface and DATA I/O interface. For the device to which the DATA I/O interface is connected e.g. electronic printer, the balance communication parameters should be set to the standard settings i.e. select the following menu elements: 76, 77, 83, 89, 92, 94. 17.4.
17.4.3 Format Specify the format of data output by the balance. For the standard format of the KERN electronic balances • Select menu element 77 . For the old data output format of the KERN electronic balances: • Select menu element 78 . 17.4.4 Speed of communication Specify the transmission speed (300, 600, 1200, 2400, 4800, 9600, 19200 or 38400 bps). The value presented as „b-xxx” gives the number of bps (bits/second). Baud-rate and bps are the same value. Select one of the menu elements from 81 to 88.
18 Service, maintenance, disposal 18.1 Clean Before cleaning, please disconnect the appliance from the operating voltage. 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 and wipe 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. 18.
19 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. General display: Display Explication Wait for the next display. Date and time are output. The process has been interrupted. Operational measurement is allowed. Too large error was found during calibration check. (Please contact your sales representative.) Too large error was found during calibration check.
Error message: Displayed error code Explication Disturbances in weight loading mechanical elements. Remedy Check transport screws. Weight on the scale pan is unstable during calibration. Large zero point drift during calibration. Empty the scale pan. Large drift during the PCAL function. Use the correct weight. Large drift during calibration of the measuring range. Use the correct weight. Calibration weight is incorrect. Use the correct weight.
Fault finding Procedures: Symptom Possible cause Remedy Display is empty. • Mains adapter is not connected. • The room mains circuit-breaker is switched off. • Incorrect voltage. Check mains voltage and connect the mains adapter correctly. „OL” or „-OL” display The transport screws are not locked. Turn the screws anticlockwise until they are locked. Install pads of the scale pan. Use the weight within its capacity. Pads of the scale pan not installed. To large weight on the scale pan.
