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 Electronic Moisture Analyser KERN DBS Version 1.
GB KERN DBS Version 1.1 03/2013 Operating instructions Electronic Moisture Analyser Contents 1 2 Technical data ................................................................................................ 4 Appliance overview ....................................................................................... 6 2.1 Overview of display .................................................................................................................. 8 2.1.1 Display examples .....................
9.1 Save / access .......................................................................................................................... 44 9.2 Adjust ....................................................................................................................................... 45 9.2.1 Drying modes .......................................................................................................................................... 45 9.2.1.1 9.2.1.2 9.2.1.3 9.2.1.4 9.2.1.
1 Technical data Data DBS 60-3 Radiator Halogen (1 x 400 W) 50°C - 200°C 1°C increments selectable Temperature range Maximum load (Max) 60 g Minimum weight (min) 0.02 g Warm-up time 2h Weighing mode 0.001g Moisture analysis mode 0.01 % Readability (d) Reproducibility „Weighing mode“ 0.001 g Reproducibility „Weighing mode“ Initial weight 2 g: 0.15 % Initial weight 5g 0.05 % Initial weight 10 g 0.
Switch-off criterion • AUTO The drying is finished when the preset weight loss (∆M ) remains constant for 30 seconds.
2 Appliance overview Front view: Pos.
Rear view: Pos.
2.1 No. Overview of display Display Description 1 Currently loaded drying program, see chap. 9.1 2 Illuminates during communication with external devices. 3 • The stability display indicates that the weighing value is stable. • Highlights current setting in the menu. 4 5 The indicator Drying mode AUTO + see chap. 9.2.1.1 TIME + see chap. 9.2.1.2 8 will mark the measuring result Status display during drying Heating-up period Preset drying temperature is reached.
RAPID Heating-up period “pre-heating step” + see chap. 9.2.1.3 The pre-heating step is switched on until “∆M pre-heating step” is constant. Temperature is lowered to the preset drying temperature. Preset drying temperature is reached. The drying is finished when the preset completion criterion is fulfilled. SLOW Heating-up period + see chap. 9.2.1.4 STEP Preset drying temperature is reached. The drying is finished when the preset completion criterion is fulfilled.
6 Previous drying time 7 Current temperature Result display, see chap. 9.2.2 8 % g 9 M/W [%] moisture D/W [%] dry mass: M/D ATRO dry mass W/D ATRO moisture Gram Gram display Basic displays Weight display Display % moisture Menu access via MENU button Equipment is in Ready mode, see chap. 8.4. 0 10 Current menu selection UNIT Equipment is in menu „Display of results“, see chap. 9.2.2 COMSET Equipment is in menu „Interface parameters“, see chap. 11.
a Status display „Equipment“ Top Is displayed when the heated cover is open. Flashes when the heated cover needs to be closed. Goes out when heated cover is closed Centre Is displayed when the heated cover is open. Goes out when heated cover is closed Flashes when drying process is active Bottom Indicates that a sample is in the sample dish. Flashes when a sample needs to be loaded. Goes out if there is no sample in the sample dish. Indicates that a sample is in the sample dish.
2.1.1 Display examples During drying: After drying: 1 Loaded drying program 2 Previous time 3 Current temperature 4 Unit „Display of results“ + see chap. 9.2.2 5 Preset drying mode / + see chap. 9.2.1 Status display drying + see chap. 2.1 6 Current moisture content in %. During drying with can be switched in ∆M (see chap. 9.2.1.1). 7 Drying process active 8 Measuring result indicator 9 Measuring value (unit in the preset result display) 12 + see chap 9.1 + see chap. 2.
2.2 Keyboard overview Turn on/off • Call up menu • Selecting a menu item to the left.
• • • Exit menu Back to moisture analysis mode Quit Start drying Complete drying Numerical input, see chap. 7.1.
3 Basic Information (General) 3.1 Proper use The device purchased by you is designed for a fast and reliable determination of material moisture in liquid, porous and solid materials by applying the method of thermogravimetrics. 3.2 Improper Use Impacts and overloading exceeding the stated maximum load (max) of the device, minus a possibly existing tare load, must be strictly avoided. Balance may be damage by this. Never operate device in explosive environment. The serial version is not explosion protected.
3.5 Danger Information WARNING ! The moisture analyser is used to analyse the moisture content of materials. This instrument must be used exclusively for this purpose. Any other usage may cause a risk to personnel, damage to the equipment or other material damage. ! The moisture analyser should be used mainly for the drying of aqueous substances. ! The moisture analyser may not be used in a hazardous area. ! The appliance may only be operated and maintained by trained personnel.
! Make sure that liquids do not get in contact with the interior of the device, the connections at the rear of the device and the peripherals (connected PC or printer). If you spill liquid on the device, disconnect it immediately. Afterwards do not operate the moisture analyzer and have it checked by a competent KERN stockist before any further use. ! Never store materials on the equipment.
! Explosive, easily flammable samples and samples that go into a chemical reaction when subjected to heat, may not be analysed with the moisture analyser. ! Sample materials emitting toxic substances must be dried with a special extraction system in place. Create an environment that prevents the inhalation of vapours hazardous to health. ! Sample materials developing aggressive vapours (e. G. Acids) may cause corrosion problems on some parts of the device. ! Careful when removing the sample.
Hazards during and after measuring ! Ensure correct installation of all components, see chap. 5.3 ! Careful when removing the sample. The sample itself, the sample dish and the heating unit may be very hot. ! Use the sample retainer at all times as it allows safe working and prevents burns. ! Individual parts of the case (e. g. the ventilation grids) may heat up considerably during operation. Therefore, only take hold of the equipment by the marked handles.
3.5.1 “Hazard information” sticker ! Ventilation grilles and inspection windows may become very hot during operation ! Always open heated cover completely. ! Do not use any combustible sample materials. ! Disconnect the equipment from the power supply prior to changing a lamp, see chap. 13.2.2.
4 Transport and storage 4.1 Testing upon acceptance When receiving the appliance, please check packaging immediately, and the appliance itself when unpacking for possible visible damage. 4.2 Packaging / return transport Keep all parts of the original packaging for a possibly required return. Only use original packaging for returning. Prior to dispatch disconnect all cables and remove loose/mobile parts. Reattach possibly supplied transport securing devices.
On the installation site observe the following: ! Remove explosive materials from the immediate vicinity. Emerging vapours, sample dish and all parts of the sample chamber are hot! ! Remove easily flammable materials from the immediate vicinity. ! Protect the device against direct draughts due to open windows and doors. ! Avoid extreme heat and temperature fluctuations e.g. due to installation next to radiators.
! Never store materials on the equipment. ! Protect the appliance against high humidity, vapours and dust, ! Major display deviations (incorrect weighing results) may be experienced should electromagnetic fields (e.g. due to mobile phones or radio equipment), static electricity accumulations or instable power supply occur. Change location or remove source of interference.
5.2 Unpacking and checking Open package, take out the appliance and accessories. Verify that there has been no damage and that all packing items are present. 5.2.1 Scope of delivery / serial accessories 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12.
5.3 Placing The moisture analyser is delivered in pieces. Check immediately after unpacking all the parts that the delivery is complete and assemble the individual components as described below. 1. Fit heat shield. 2. Install wind protection ring, ensuring correct positioning, on .
3. Install dish holder, ensuring correct positioning, on . 4. Fit sample dish. 5. Level the equipment with foot screws [1] until the air bubble of the water balance is in the prescribed circle.
Fig. 1 Fig. 2 If the air bubble is at the lefthand edge, level the equipment with the righthand foot screw, see Fig.1. If the air bubble is at the righthand edge, level the equipment with the lefthand foot screw, see Fig.2. Fig. 3 Fig. 4 If both foot screws are turned simultaneously in clockwise direction, the air bubble will move forwards (see Fig.3). If both foot screws are turned simultaneously in anticlockwise direction, the air bubble will move backwards (see Fig.4). Check levelling regularly.
5.4 Mains connection Power supply is provided via the supplied mains cable. Check, whether the voltage acceptance on the scales is set correctly. Do not connect the appliance to the power grid unless the information on the appliance (sticker) matches the local mains voltage. Important: Does the labelling match the local mains voltage? Do not connect if mains voltages are different! - If matching, connect the scales. The moisture analyzer must be connected to a standard socket with earth terminal.
5.4.1 Turning On the Power Supply balance with power via the mains power cable. The display lights up and the equipment conducts a self-test. The selftest is completed when „OFF“ appears on the display. To switch on press the ON/OFF button. The equipment conducts a segment test. As soon as the weight display appears, the instrument will be ready to weigh.
5.5 Commissioning In order to obtain exact results, the appliance must have reached its operating temperature (see warm-up time chap. 1). For this warm-up time the appliance must be connected to the power supply. The accuracy of the appliance depends on the local acceleration of gravity. Strictly observe hints in chapter Adjustment. 5.
6 Adjustment 6.1 Adjust balance 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).
• If the value of the adjustment weight needs to be changed, use the navigation buttons to make the required setting (see chap. 7.1.1. “Numerical input”). • The adjustment protocol output is started upon connection to an optional printer and activated GLP function (see chap. 6.3). When the adjustment weight display flashes, e.g. 50g, place it carefully in the centre of the sample dish. Adjustment starts. Wait until „0.000g“ appears. Remove the adjustment weight during the flashing display.
6.2 Adjust temperature We recommend sometimes to check the temperature value of the device using the optional temperature calibrating set DBS-A01. The temperature is measured at two points (100°C and 180°C) and can be adjusted at these two points. The equipment should cool down first to room temperature after the last heating period. Preparation: Fix the temperature sensor on the temperature calibration set in accordance with the illustration.
Call up menu: Press the Menu button to access the menu and the first menu item “PRoGRM” will be displayed. Use navigation buttons to select menu item “CAL”. Acknowledge using ENTER key, the current setting is displayed. If necessary, use navigation buttons to select “TEMP”. Press ENTER to confirm and the first temperature point to be tested will be displayed. Press START and the first heating-up period will start.
The second temperature point to be tested will be displayed. Confirm with the ENTER button, the second heat-up phase is started. Temperature calibration for the second point takes 15 min. Compare the displayed temperature value on the thermometer with that of the moisture analyser whilst the temperature display is flashing. If the two values do not match, correct them using the navigation buttons and confirm with the ENTER button Numerical input, see chap. 7.1.1.
6.3 ISO/GLP log Quality assurance systems require printouts of measuring results as well as of correct adjustment stating date and time and equipment identification. The easiest way is to have a printer connected. • Ensure that the communication parameters for moisture analyser and printer concur, see chap. 11.2. • For printout sample see chapter 11.7 Press the Menu button to access the menu and the first menu item “PRoGRM” will be displayed. Use navigation buttons to select menu item “CAL”.
7 Menu DBS-BA-e-1311 37
7.
7.1.
8 Moisture analysis 8.1 Start drying First set the drying parameters as described in chap. 9 during initial start-up. Or set the drying parameters as described in chap. 9 or load from store a suitable drying program for the sample, see chap. 9.1. Ensure that the equipment is in Moisture analysis mode. Press ESC if necessary. Open heated cover Deposit a sample dish acclimatised to room temperature.
Close heated cover and measuring will start automatically. • If measuring does not start automatically, the equipment is preset for Manual start. Press the START button to start. • Manual or Automatic start can be selected in the menu, see chap. 9.2.3 • Observe hazard information, see Chapter 3.5 “Hazards during and after measuring” When drying is finished, you will hear an acoustic signal and the heating will be shut off. The measuring result, marked by the indicator [ ]], will be displayed.
8.2 Abort drying The measuring can be aborted at any time by pressing the STOP button. A long signal will sound, and “ABORT” will be displayed. Either Press ESC key. The equipment reverts to Moisture analysis mode and the measuring result is discarded. or Press STOP key again. The measuring result, marked by the indicator [ ]], will be displayed and saved. 8.3 Finish drying Open heated cover ! Observe hazard information, see Chapter 3.
9 Drying parameters The equipment can be used to store complete drying programs with drying parameters individually adapted to the sample. Four drying modes (Standard drying, Step drying, Slow drying and Rapid drying) and two switch-off criteria (Time-controlled and Automatic) can be selected. Further parameters such as drying time, drying temperature and ∆M (constant weight loss per 30 seconds) should be set depending on the modes, see table below.
9.1 Save / access 10 memory locations, which can be simply called up and started as necessary under the saved Program number, are available for complete drying processes. Press the Menu button to access the menu and the first menu item “PRoGRM” will be displayed. Use navigation button and confirm by pressing ENTER. The current setting will be displayed. Use navigation buttons to select the required Program Number, Nos.0 – 9 can be selected. Press ENTER to confirm selection.
9.2 Adjust 9.2.1 Drying modes 9.2.1.1 Drying mode AUTO (Standard drying/switch-off criterion “∆M“) Drying will be carried out at the drying temperature preset by the user. The drying is finished automatically when the preset weight loss (∆M ) remains constant for 30 seconds. SETTINGS: • Drying mode AUTO • Drying temperature ∆M Press the Menu button to access the menu and the first menu item “PRoGRM” will be displayed. • Press navigation button , then use navigation buttons to select “AUTO”.
9.2.1.2 Drying mode TIME (Standard drying/switch-off criterion “Time“) The drying will be carried out at the drying temperature preset by the user and will end automatically when the preset time has expired. SETTINGS: • Drying mode TIME • Drying temperature • Drying time Press the Menu button to access the menu and the first menu item “PRoGRM” will be displayed. Press navigation button , then use navigation buttons to select “TIME”.
9.2.1.3 RAPID Drying mode (Rapid drying) A preheating step is switched on for Rapid drying, i.e. the temperature will increase very quickly and will exceed the preset drying temperature until it falls below the preset reference value (weight loss/30 sec). After that the temperature will be adjusted down to the set value. The drying will end depending on the setting, when the preset time has expired or the preset weight loss (∆M) remains constant for 30 seconds.
Press ENTER to confirm selection. The currently present switch-off criterion will be displayed. Use navigation buttons to select the required setting, TIME = time-controlled ∆M = automatic TIME setting Press ENTER to confirm selection. The currently set drying time is displayed. Use navigation buttons to select the required setting, 1 minute – 4 hours (1 minute increments) or 4 hours - 12 hours (1 hour increments) can be selected Press ENTER to save.
9.2.1.4 SLOW Drying mode (Slow drying) The Slow drying temperature is increased more slowly to the preset value than for Standard drying. The drying will end depending on the setting, when the preset time has expired or the preset weight loss (∆M) remains constant for 30 seconds. Slow drying is suitable for samples that cannot tolerate rapid heating by the heaters. The same applies to samples that form a skin during rapid heating. This skin will then affect the evaporation of the trapped moisture.
Press ENTER to confirm selection. The currently present switch-off criterion will be displayed. Use navigation buttons to select the required setting, TIME = time-controlled ∆M = automatic TIME setting Press ENTER to confirm selection. The currently set drying time is displayed. Use navigation buttons to select the required setting, 1 minute – 4 hours (1 minute increments) or 4 hours - 12 hours (1 hour increments) can be selected Press ENTER to save.
9.2.1.5 STEP Drying mode (Step drying) Step-by-step drying is suitable for substances that display special behaviour during warming. 2 or 3 steps can be selected. The individual steps are freely selectable regards duration and temperature rising step. The drying will end depending on the setting for step 2 or 3, when the preset time has expired or the preset weight loss (∆M) remains constant for 30 seconds. Settings: STEP Drying mode 1. Level Drying temperature 2. Level Drying temperature 3.
4. Preset drying time for step 1 Press ENTER to confirm. The currently preset drying time for step 1 will be displayed. Use navigation buttons to select the required setting, 1 minute – 4 hours (1 minute increments) can be selected 5. Set drying temperature for step 2 Press ENTER to confirm and the currently preset drying temperature for step 2 will flash in the display. Use navigation buttons to select the required setting, 50°C – 200°C (1°C increments) can be selected. 6.
7. Set drying parameters for step 3. For drying temperature input, see step 5. For drying time input or ∆M see step 6 8. Return to weighing mode Press ESC to return to Moisture analysis mode. The equipment is ready to measure (see chap. 8.1). All the settings that have been made control the drying process.
9.2.2 Result display The result display enables the selection of a display in % moisture, % dry mass, ATRO* dry mass, ATRO* moisture and residual weight in grams.
Use the navigation key to select menu item „UNIT“. Acknowledge using ENTER key, the current setting is displayed. Select the desired unit using the navigation keys ( ). Display Description [M/W] [%] moisture [D/W] [%] dry mass: [M/D] ATRO* dry mass [W/D] ATRO* moisture [GRAM] Gram display Press ENTER to confirm selection. The currently preset value for the minimum reading will be displayed. Select the desired position using the navigation keys .
9.2.3 Start criterion The menu item “START” enables the selection of Manual and Automatic start of a measurement. Press the Menu button to access the menu and the first menu item “PRoGRM” will be displayed. Use the navigation keys to select the menu item „START“ . Press ENTER to confirm and the indicator next to “EASY” will display the current setting. Use the ENTER button to switch between Manual and Automatic start.
10 Miscellaneous settings 10.1 Enter sample designation A 4-digit sample code can be saved for a sample under menu item “CoDE”. This is output in the measuring protocol. Options: 1st and 2nd digit: „0 – 9“ or „A –Z“ or „_“ 3th and 4th digit: “0-9” (the value is automatically increased by “1” for each measurement, it reverts to “00” upon reaching “99”) Default setting: „0000“ Press the Menu button to access the menu and the first menu item “PRoGRM” will be displayed.
10.2 Set date/time for measuring protocol Press the Menu button to access the menu and the first menu item “PRoGRM” will be displayed. Use the navigation key to select menu item „DATE“. Press ENTER to confirm and the currently preset date format will be displayed. Use navigation buttons to select the required format. Display Description [YYMMDD] Year/Month/Day [MMDDYY] Month/Day/Year [DDMMYY] Day/Month/Year Press ENTER to confirm and the currently preset date will be displayed.
10.3 Menu Lock The menu setting operations can be locked so that the settings cannot be changed. The following menu blocks are available despite menu lock. + PRG-No / call up drying programs, see chap. 9.1 + LoCK / menu lock, current chap. + PRINT / output of measuring results, see chap. 11.4 Activate menu lock: 1. Press the Menu button to access the menu and the first menu item “PRoGRM” will be displayed. 2. Use the navigation key to select menu item „LoCK“. 3.
Remove the menu lock Repeat steps 1-5. Press ENTER to confirm. The current setting will be displayed. Press ESC if “LOCK” is displayed. The menu lock is cancelled. The equipment reverts to Moisture analysis mode.
10.4 Change password Standard password (factory setting): „9999“ 1. Press the Menu button to access the menu and the first menu item “PRoGRM” will be displayed. 2. Use the navigation key to select menu item „PASS“. 3. Acknowledge using ENTER key, the password inquiry is displayed. The active digit is flashing. 4. Use the navigation buttons to enter the currently set password, see chap. 7.1.1 “Numerical input”. + + + Default setting: „9999“.
10.5 Enter identification number Options: Four characters, to select from „0 – 9“ or „A –Z“ or „_“ Default setting: ID „0000“ Press the Menu button to access the menu and the first menu item “PRoGRM” will be displayed. Use the navigation keys to select the menu item „ID“ . Press ENTER to confirm and a 4-digit number will be displayed. The active digit is flashing. Enter the desired ID no. using navigation buttons (see chapter 3.1.1 „Numeric input“).
10.6 Resetting the menu A menu reset will return all the settings to factory setting. Press the Menu button to access the menu and the first menu item “PRoGRM” will be displayed. Use the navigation keys to select the menu item „RESET“ . Acknowledge with ENTER key, „“RST.OK?“ will be displayed. Confirm query with ENTER key. All settings will be reset to factory settings. Press ESC to return to Moisture analysis mode.
11 Print, store and call-up measurement results The data exchange between moisture analyser and printer occurs via the RS 232C interface. In addition to the measurement result, for the finished drying process all drying parameters are automatically stored with the printout (100 positions). The memory location designation is automatically allocated with a consecutive number (XX00 – XX99) as well as a selectable designation “XX” (see chap. 10.1). + Call up and print out measuring results, see chap. 11.
11.
11.2 Interface parameters 1. Press the Menu button to access the menu and the first menu item “PRoGRM” will be displayed. 2. Use the navigation buttons to select menu item „CoM.SET“. 3. Confirm with ENTER key, the currently preset port will be displayed oUT.I = RS232 oUT.2 = USB 4. Use the navigation keys to select „oUT.I“. 5. Press ENTER to save input and the currently preset baud rate will be displayed. 6. Use the navigation buttons to select the desired setting. 7.
• Handshake Selectable settings: Display HS.HW* HS.SW HS.TiM HS.oFF Handshake Hardware handshake Software handshake Timer handshake No handshake • Delimiter (terminator) Selectable settings: Display CR* LF CR+LF Terminat or CR LF CR+LF Press ESC to return to Moisture analysis mode. Factory settings are marked by *.
11.3 Output interval Press the Menu button to access the menu and the first menu item “PRoGRM” will be displayed. Use the navigation keys to select the menu item „PRINT“ . Acknowledge with ENTER key, “INTVAL“ will be displayed. Press ENTER to save input and the currently preset output interval will be displayed. Use the navigation buttons to select the desired setting.
11.4 Call up and print out measuring results Press the Menu button to access the menu and the first menu item “PRoGRM” will be displayed. Use the navigation keys to select the menu item „PRINT“ . Press ENTER to confirm. Use the navigation keys to select the menu item „MEMoRY“. Press ENTER to confirm. All drying processes will be output to the printer. Press ESC to return to Moisture analysis mode. • The ESC key may be used to cancel the data output.
11.5 Print out currently preset drying parameters Press the Menu button to access the menu and the first menu item “PRoGRM” will be displayed. Use the navigation keys to select the menu item „PRINT“ . Press ENTER to confirm. Use the navigation keys to select menu item „CND.oUT“. Press ENTER to confirm. The currently preset drying parameters will be output to the printer. Press ESC to return to Moisture analysis mode. For printout sample see chapter 11.
11.6 Delete measuring results from memory Press the Menu button to access the menu and the first menu item “PRoGRM” will be displayed. Use the navigation keys to select menu item „MEM.CLR“. Confirm with ENTER key, the query CLR.oK? will be displayed. Press ENTER to confirm. The entire memory content will be deleted. Press ESC to return to Moisture analysis mode.
11.7 Printout examples 1. Moisture analysis measuring protocol KERN & Sohn GmbH TYPE DBS60-3 SN WBIIAH0000I ID 0000 CODE 0006 DATE 10-05-11 TIME 10:17 PNO. 6 UNIT M/W MODE TIME TEMP 120C STOP 00:02 WET W(s) 1.638 TIME 00:00:00 00:00:30 00:01:00 00:01:30 00:02:00 * 00:02:00 M/W (%) 0.00 0.10 0.14 0.16 0.18 0.18 Dry W(g) 1.635 72 Company Model Serial no. Identification No. (see chap. 10.5) Sample designation (see chap. 10.1) Date (see chapter. 10.2). Time Program No. (see chap.9.
2. Adjustment log „Balance“ CAL-BALANCE KERN & Sohn GmbH Adjust balance (see chap. 6.1) Company TYPE DBS60-3 SN WBIIAH0000I ID 0000 Model Serial no. Identification No. (see chap. 10.5) DATE 10-05-11 TIME 10:17 Date Time REF= 50.000g BFR= 50.002g AFT= 50.000g Used adjustment weight Before adjustment After adjustment (see chap. 10.2).
3. Adjustment log „Temperature“ CAL-TEMPERATURE KERN & Sohn GmbH Adjust temperature (see chap. 6.2) Company TYPE DBS60-3 SN WBIIAH0000I ID 0000 Model Serial no. Identification No. (see chap. 10.5) DATE 10-05-11 TIME 10:17 Date Time REF= 100C BFR= 100C AFT= 100C First temperature point Temperature before adjustment Temperature after adjustment REF= 180C BFR= 181C AFT= 180C Second temperature point Temperature before adjustment Temperature after adjustment (see chap. 10.2).
12 General information concerning moisture analysis 12.1 Application In all cases where moisture is added to or removed from products, a fast determination of the moisture content is of enormous importance. For countless products the moisture content is not only a quality feature but also an important cost factor.
12.4 Preparing a sample Prepare one sample at a time for measuring. This prevents the sample from exchanging moisture with its surroundings. If several samples have to be taken at the same time, they should be packed in airtight boxes so that they do not undergo changes during storage. To receive reproducible results, spread the sample thinly and evenly on a sample dish.
12.
12.7 Drying temperature Bear in mind the following factors when setting the drying temperature: Surface of the sample: Compared with powdery or grainy samples, liquid and spreadable samples have a smaller surface for the transmission of heat energy. The use of a glass fibre filter improves the heat application. Colour of sample: Light-coloured samples reflect more heat radiation than dark ones and therefore require a higher drying temperature.
Table of applications: Material ABS (Novodur P2H-AT) Accumulator lead Acryl granulate Activated carbon Activated carbon Sliced pineapple Sliced apple (dry) Sliced apple (humid) Artesan powder Aspartame granulate Bath milk Cotton seed Blue-veined cheese Body lotion Beans Butter Acetyl cellulose Chinese Virility powder CN photographic paper Cornflakes Roof tile mass Roof tile mass Dialysis membrane (Polyethes – polycarbonate) Dialysis membrane (Polyethes – polycarbonate) Indoor sealing compound Dispersion ad
Material Setting lotion Setting lotion (extra strong) Hair styling gel Oat flakes Hazelnut cores Hazelnut cores (peeled) Hydranal sodium tatrate – 2 – hydrate Yoghurt Coffee Coffee cream Coffee seed Cocoa Cocoa seed Limestone Potato powder Potato chips Ketchup Silica gel Adhesive Garlic, powder Coal powder Chalk (natural) Crystal sugar Synthetic resin dispersion (diluted) Latex 1 Latex LE 2 Latex LE Latex O44 Lentils Loam soil Loam clay Skim milk powder Low fat curd cheese Corn starch Almonds (caramelised)
Material Paper PA 6 (Ultramide B3WG5) PA 6.
Material Tobacco Tea, black Pasta Textile fibre Theophylline Thermoplastic PUR – granulate Walnut Washing powder Wheat spring water Sausage casing Toothpaste Pulp Cement Sugar Sugar beets Weight Sample (g) Drying temperature ( °C) Drying period (approx.) (min) Moisture % (approx.) 1.5 2 1.5 0.8-1.2 1.5 100 105 120 85 130 16 4 8 3.6 1.9 10.18 7.67 10.64 14.03 7.33 15-18 80 18 0.08 2.8 2 2-3 0.2 2 2.5 8-12 4-5 2 100 160 90 150 100 130 138 138 130 5.6 12 10 3.5 7.7 4.5 4-5 10 13.4 3.5 7.
13 Service, maintenance, disposal 13.1 Cleaning + Before any maintenance, cleaning and repair work disconnect the appliance from the operating voltage. + Only carry out cleaning tasks when the equipment has cooled down. 1. Display 2. Wind protection ring 3. Sample dish 4. Housing Please do not use aggressive cleaning agents (solvents or similar agents), but a cloth dampened with mild soap suds.
13.2 Service, maintenance The appliance may only be opened by trained service technicians who are authorized by KERN. Ensure that the balance is regularly calibrated, see chap. Testing instruments control. 13.2.1 Remove protective glass guard + Avoid contact with halogen lamp and sensor! + Handle protective glass guard with care. Attention: Risk of breakage + Risk of cuts. 1. Open heated cover. 2. Undo the screws marked with arrows with the hexagonal socket wrench included in the scope of supply.
3. Remove protective glass guard and clean with a commercially available glass cleaner. Glass plate [1] can be removed if necessary by undoing the screws [2]. 4. Refit the cleaned protective glass guard in reverser order.
13.2.2 Lamp change + Disconnect equipment from power supply. + Only change the lamp when the equipment has cooled down. 1. Remove protective glass guard, see chap. 13.2.1 2. Remove plug connector [3]. Remove cable from terminals [2] with care. 1. Light 2. terminal 3. Plug connector 3. Loosen lamp [1] from the clips [4] on both sides. 4. Clips 4. Install new lamp in reverse order. Avoid contact with the halogen lamp to maintain service life. Position plug connector in accordance with illustration.
13.2.3 Replacing fuses + Disconnect equipment from power supply. + Only use 6.3 A microfuses 1. Remove fuse box (see chap. 2, Item 15) from the back of the equipment and change the fuse in accordance with the illustration. 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.
14 Instant help Fault Possible cause Display is not lit up. • The display unit is not switched on. • The mains supply connection has been interrupted (mains cable not plugged in/faulty). • Power supply interrupted. • Fuse has blown The display does not change when a sample is being loaded • The weight display changes • constantly / the stability display does not appear. • Sample dish / dish holder is fitted incorrectly. Sample dish has contact with wind protection device or heated cover.
14.1 Error messages Error message Explication ERR.001 ERR.002 Hardware error Remedy Switch equipment off and on again. If the error message remains inform manufacturer. ERR.005 Memory error Switch equipment off and on again. If the error message remains inform manufacturer. ERR.100 Heated cover is open for more than 1 minute during measuring. Press ESC to abort measuring. Failure „Temperature sensor“ Switch equipment off and on again. If the error message remains inform manufacturer. ERR.
ERR.C01 ERR.C02 ERR.C04 Adjustment error High zero point shift during adjustment There are objects in the sample dish Press ESC to abort and repeat adjustment procedure. Missing sample dish ERR.oL ERR.-oL Overload Check sample dish CoM.ERR Wrong remote control order. Correct remote control order.
15 Declaration of conformity KERN & Sohn GmbH D-72322 BalingenFrommern Postfach 4052 E-Mail: info@kern-sohn.de Tel: 0049-[0]7433- 9933-0 Fax: 0049-[0]7433-9933149 Internet: www.kernsohn.
