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 manual Electronic Moisture Analyser KERN DLT-N Version 2.
GB KERN DLT-N Version 2.1 12/2014 Operating manual Electronic Moisture Analyser Contents Technical data ................................................................................................ 5 1 2 Appliance overview ....................................................................................... 7 2.1 Overview ...............................................................................................................................7 2.2 Tablet ......................................
7 Operating elements ..................................................................................... 27 7.1 Start screen ........................................................................................................................27 7.2 Work screen ........................................................................................................................29 8 Simple weighing / taring.............................................................................. 30 8.
15 General information concerning moisture analysis ................................. 68 15.1 Application .........................................................................................................................68 15.2 Basics .................................................................................................................................68 15.3 Adjustment to existing measuring method .......................................................................68 15.
1 Technical data Data DLT 100-3 Radiator Halogen (1 x 400 W) 35°C - 160°C Choice of steps at 1°C Temperature range Maximum load (Max) 160 g Warm-up time 2h Minimum for drying 0.5 g Weighing mode 0.001g Moisture analysis mode 0.01 % Weighing mode 0.001g Readability (d) Reproducibility 0.03 % (Initial weight 10 g) Moisture analysis mode Preheating before weighing-in Linearity ± 0.002 g Stabilization time (typical) 3 sec.
Shutoff criterion • Manual Press stop button • Time Drying is finished after the set time, adjustable 1 – 99 minutes • Autostop % when the set weight loss (%) per time unit is lower than the nominal value (both values adjustable) • Autostop absolute when the set weight loss (mg) per time unit is lower than the nominal value (both values adjustable) Data base for drying programs Interface Dimensions of the housing moisture analyser (B x D x H) Available drying room Dimensions tablet (B x D x H) Samp
2 Appliance overview The instrument comprises a drying unit (integrated balance + heating module) and a tablet serving as terminal. 2.1 Overview Pos.
2.2 Tablet Front side: Rear side: 1 Touch screen 1 Audio loudspeaker 2 Front camera 2 Volume key 3 On / off key 4 Loudspeaker / headset port 5 Microphone 6 Micro USB 2.
3 Basic instructions 3.1 Proper use The instrument 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 instrument, minus a possibly existing tare load, must be strictly avoided. Balance may be damage by this. Never operate instrument in explosive environment.
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 instrument may only be operated and maintained by trained personnel. 4.
CAUTION The moisture analyzer operates using heat! + Maintain sufficient space in the environment of the instrument to prevent heat build-up (distance from the instrument 20cm, upwards 1m). + The heat extractor of the sample must never be covered, blocked, taped up or altered in any other way. + Never place combustible materials on, under or next to the instrument, as the environment of the instrument heats up to a high temperature. + Careful when removing the sample.
5 Transport and storage 5.1 Testing upon acceptance When receiving the appliance, please check packaging immediately, and the instrument itself when unpacking for possible visible damage. 5.2 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 explosion prone and easily flammable material in the immediate vicinity. Emerging vapours, sample dish and all parts of the sample chamber are hot! ! Protect the instrument against direct draughts due to open windows and doors. ! Avoid extreme heat and temperature fluctuations e.g. due to installation next to radiators. ! Do not expose the instrument to extreme dampness for longer periods of time.
6.2 Unpacking and placing 1. Drying unit Take the instrument carefully out of its packaging, remove the plastic jacket and install it at the designated work space. The instrument is supplied part-assembled. Immediately after unpacking check if the delivered items are complete. Assemble the separate component parts according to their sequence. 1. Windshield 2. Sample dish holder 3. Removal aid 4. Sample dish 1. Put windscreen in sample chamber. 2. Carefully put sample dish holder on top. 3.
5. Level instrument with foot screws until the air bubble of the water balance is in the prescribed circle. Check levelling regularly. 5. Tablet Remove the tablet carefully from the packaging, remove plastic cover and install at intended place of installation, using the table mount. Charge the rechargeable battery. Before the first use, the battery should be charged by connecting it to the mains power supply for at least 8 hours. 6.
6.4 Connections 1. Drying unit 5 4 6 3 2 1 7 1. Connection of connecting cable “balance / heating module“ 2. Connection net adapter „Balance“. 3. Power supply „heating module“. 4. Connection RS 232 „Bluetooth Adapter“ 5. Connection of connecting cable “balance / heating module“ 6. Main switch „heating module“ 7.
8 10 9 7 8. 9. 10. 11.
2. Tablet Rear side: 1 Audio loudspeaker 2 Volume key 3 On / off key 4 Loudspeaker / headset port 5 Microphone 6 Micro USB 2.
6.5 Mains connection Power is supplied to the integrated balance via the external power unit. 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. Power supply to the heating module is provided via the supplied mains cable. Do not connect the instrument to the power grid unless the information on the instrument (sticker) matches the local mains voltage.
If not, activate it by following the steps below: In weighing mode, press and hold pressed until the audio signal stops. Release the key and the menu item “units“ will appear. Press repeatedly until “tbL mode“ appears. Acknowledge with Press to select the setting ”tabl on“. Acknowledge with + + 20 . The current setting will be displayed. . Wait until „tablet“ appears. To turn on the tablet, press and hold the tablet’s on/off key for approx. two seconds.
+ The start screen will appear. + Ensuring Bluetooth connection When enabled, the icon for Bluetooth corner. + will be shown in the top right To start application “moisture analysis“, use DLT_N-BA-e-1421 .
+ Wait for Bluetooth connection, whereupon the start screen will appear. + Setting operator language On delivery the display is set to German. Setting additional languages: Tap . Tap . Tap .
In dropdown menu select the desired language. Initial Commissioning In order to obtain exact results with the electronic balances, your balance must have reached the operating temperature (see warming up time chap. 1). During this warming up time the weighing system must be connected to the power supply (mains, accumulator or battery). To adapt the balance to ambient conditions, open wind screen doors. The accuracy of the weighing system depends on the local acceleration of gravity.
6.7 Call-up weighing mode Press in table mode, “tbl mode” will be shown. Press to confirm, “tabl on“ will be shown. Press to select setting “tabl oFF“. Acknowledge with . Wait until weighing mode is shown. 6.8 Connection of peripheral devices Before connecting or disconnecting of additional devices (printer, PC) to the data interface, always disconnect the moisture analyser from the power supply.
6.9 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).
During the flashing display put the required adjustment weight carefully in the centre of the sample dish. After successful adjustment the balance automatically returns to weighing mode. Take away adjustment weight To view/issue an adjustment protocol, call the following menu item (See chap 10.
7 Operating elements In “tablet mode” the keys of the drying unit will be disabled (with the exception of ON/OFF). Use the tablet for all actions. 7.
1 Call-up function menu: 2 Status display Tap and hold: Set standby temperature: 3 User specific shortcut keys (M1- M5) for calling up the 5 most frequently used drying programs Function keys (Pre tare, zero setting / tare, print) 4 5 Link to android service programs Back to previous screen Tap twice: Exit application “moisture meter“.
7.2 Work screen The work screen is shown at the start of measuring, see chap. 11. 1 Drying process active 2 Instructions for the performance of tasks during measuring 3 Weighing guide; only shown when function is enabled, see chap. 11.1.4 4 Enter tare value numerically 5 Start drying; only shown for setting , see chap. 10.
8 Simple weighing / taring In order to obtain exact weighing results, the integrated balance must have reached its operating temperature (see warming up time chap. 1). 8.1 Weighing: Ensure weighing mode Wait for zero display, reset to zero using 0/T. Place goods to be weighed on balance. Wait until the stability display appears [ ]. Read weighing result. 8.2 Taring: 1. Put weighing container on the weighing pan. 2. Wait until the stability display ( ) appears, then tap 0/T button. 3.
9 User profile In this menu 10 user profiles can be created, processed or deleted. Each user will be assigned to a profile with his own specific settings (basic settings of the instrument, hole data memory). Factory setting is „Default“, this cannot be deleted or renamed. Tap top right corner of control button . Tap control button , the dropdown menu will appear. < New profile > Create new user profile Enter “user name“ in numeric input window and import by pressing .
10 Setup menu In this menu item the user-specific basic settings of the instrument take place. The settings are stored together with the active user profile and remain valid if working with that profile. If a user profile is called up, the respective settings are automatically loaded, see chap. 9. Invoke setup menu: Tap top right corner of control button . To call the setup menu, tap the button and the dropdown menu will appear.
10.1 Heating module settings Tap , see chap.: 10. The available settings will be displayed. Settings: Off Switched off Standby Temperature The numeric input window will be displayed. Enter required temperature selectable 35°C – 100°C. To import press . The display returns to the previous screen.
< Stability test > < End acoustic signal> Settings: On Stability control before start of measurement switched off Av Stability control before start of measurement switched off Settings: On Switched off Off When turned on, an audio signal will be sounded as soon as the test is finished. < Temperature test > See chap. 6.9.2 < Heater adjustment data > See chap. 6.9.
10.2 Balance settings Tap , see chap: 10. The available settings will be displayed. < Filter > Settings: This menu item allows the balance to be set according to specific ambient conditions and measuring purposes. Filter 1 Setting for dosage Filter 2 The balance reacts quickly and in a sensitive manner, very quiet set-up location.
10.3 Peripheral equipment Tap , see chap: 10. The available settings will be displayed.
10.4 Adjustment Tap < Calibration settings > see, chap: 10. The available settings will be displayed. < Calibration data > View or print adjustment protocol: < Calibration mode > Settings: External default Standard (default setting) External custom DLT_N-BA-e-1421 Here the adjustment takes place near the maximum load of the balance (recommended adjustment weight see chap. 1). Weights of different nominal values may be used here for adjustment but are not optimal for technical measuring.
10.5 Colour of display Tap , see chap: 10. The available settings will be displayed.
10.6 Service menu Tap , see chap: 10. The available settings will be displayed. The changes to service menu settings described below must be made by expert staff with profound knowledge of balances. < Backup and reset system data > < Administration of database > < Reset to default settings > < Update software of balance> < Technical service of balance> (Password: 1234“) < Technical service of heating module> (Password: 1122“) see chap. 6.9.2.
11 Drying parameters The optimum drying parameters (drying temperature, drying period) depend on the type and size of the sample and the required accuracy of the measuring result. The exact parameters can only be determined by experiments. You will find examples taken from actual use in our application manual, available from our KERN home page (www.kern-sohn.com).
11.1.1 Setting the heating profile This function offers different heating profiles to adapt the drying characteristic optimally to the used sample. Tap < Heating profile > in dropdown menu (see chap. 11.1). The available heating profiles are displayed: • • • • Standard Fast Ramp Steps 1. Standard drying Display pictogram during drying This heating profile are used for most samples. The sample will be heated up to the set drying temperature, selectable 35°C -160°C Tap < Standard >.
3. Gentle drying Display pictogram during drying This heating profile is suitable for the soft drying of substances, which tend to skin formation (e.g. substances containing sugar or volatile substances). Skin formation will then affect the evaporation of the trapped moisture. The temperature is permanently increased and reaches the selected drying temperature only after finishing the so called ramp duration. The ramp, i.e.
4. Step-by-step drying Display pictogram during drying This heating profile is suitable for drying substances which consist of several components (such as etheric oils), which evaporate at different temperatures or of substances which present a specific behaviour when being warmed up. 3 steps can be selected. For the individual steps are freely selectable drying temperature and duration. In the last step the switch-off criterion finishes the measurement. Tap < Steps >.
11.1.2 Shutoff criterion A switch-off criterion defines when the instrument has to finish the drying process. The switch-off criteria make sure that the measurements are always finished under the same conditions thus providing repeatable measurements. Tap< Shutoff Criterion > in dropdown menu (see chap. 11.1).
Selectable parameters: Variation: 0.1 - 10.0% Time unit: 1 – 99 s To import press . 4. Absolute auto stop This switch-off criterion is based of the weight loss (mg) per time unit. Measurement is finished, when the set weight value per time unit is lower than the nominal value, both values being freely adjustable [mg / sec]. Tap < Autostop absolute >. Tap loss of weight (variation absolute) or time unit and enter desired value.
11.1.3 Preheating (before weighing-in) If needed, the function „preheating“ can be enabled for preheating the sample chamber prior to beginning the actual measurement. A preheated device may affect the consistency of the results as the device keeps the same temperature status for each measurement. Preheating will take place up to the point of measuring, in standby mode (For setting see chap. 7, [2]) including after finished measuring. Tap < Preheating > in dropdown menu (See chap. 11.1).
11.1.4 Weighing assistance The weigh-in aid facilitates the weighing-in of the samples on a nominal value with adjustable tolerance range. This is especially useful, when samples with the same weight are processed. This will increase reproducibility of the measurement results. If all samples are weighed-in within the tolerance range, this will increase repeatability. Tap < Weight check > in the dropdown menu (See chap. 11.1).
Return to menu by .
11.1.5 Result display This function will define the unity where the measuring results are displayed and printed out.
Settings: Tap < Units > in dropdown menu (See chap. 11.1). Selectable display types: Moisture (%M) Dry weight (%R) Atro (%A) Residual weight (g) Note: You can switch over during or after weighing to the available units, see chap. 12 “Switch over result display“. After having entered all drying parameters, you can start the drying cycle by tapping the top right corner, see chap.
11.2 Save drying parameters in database Tap < Moisture Determination >. Tap . The dropdown menu for data records will appear. The database will be empty when started up for the first time. To create a new data record (drying program), tap the icon corner. in the top right The list of parameters will appear.
11.2.1 Creating a new drying program (data record): Call parameter dropdown menu, see chap. 11.2 Tap and the input window will appear. Enter name (such as maize silage) for the new drying program (max. 30 characters) and import by pressing . Then enter all drying parameters: Description (max. 30 characters) For heating profile, see chap. 11.1.1 For cut-off criteria, see chap. 11.1.2 For preheating, see chap. 11.1.3 For weighing guide, see chap. 11.1.
11.2.2 Change / delete drying programs (data record) Tap . Tap . The dropdown menu for data records will appear. Highlight the data record to be edited by tapping on it. To highlight all data records, tap icon and select < Select all > Press to change drying parameters. Import changes with . or Delete data record with . To import query, press .
12 Carrying Out Measurement During the first start-up set the drying parameters as described in chap. 11. (1) Start-up Turning on moisture meter, see chap. 6.6. In order to obtain exact results, the instrument must have reached its operating temperature (see warm-up time chap. 1). For this warm-up time the instrument must be connected to the power supply. (2) Select drying program Tap . There are three options for loading the work screen (See chap.7.
After setting all drying parameters, tap the control button the top right corner. The work screen will appear, showing the previously set parameters. < Database parameter settings > Load desired drying program from the dropdown menu by tapping. or Use menu. to search names in the dropdown The drying parameters of the selected data record will be shown in the blue window. Tap control button top right corner. The work screen for the selected drying program will appear.
Shortcut keys Tap shortcut key (M1 –M5). The work screen for the selected drying program will appear.
(3) Carrying Out Measurement Step 1: Preheat Work screen without preheating, see chap.11.1.3 Work screen with preheating, see chap.11.1.3 Sample display: Work screen with weighing guide disabled, see chap: 11.1.4 The display may prompt you to close the sample chamber. Sample display: Work screen with weighing guide enabled, see chap: 11.1.4 Close sample chamber, preheating will start. The warning symbol will be displayed for temperatures > 50°C.
Working with the weigh-in aid: The bar graph display moves from the left to the right and proceeds equally to the weight loaded onto the weighing balance. yellow: Weighed-in < lower weight value green Target weight within the weight limits red: Weighed-in > upper weight limit Step 3: Start drying Measuring will start independently on the setting „Start mode“, see chap. 10.1 Automatic Measurement will start automatically after closing the sample chamber.
Step 4: Display during drying process You can watch the drying process on the display unit. The drying progress is shown continuously as a graphic display. The display shows the selected settings. To interrupt the drying process tap control button . 3 1. 2. 3. 4. 5. 6. 7. 8. 9.
Switch over display of result Tap result display of result and import desired unit into dropdown menu (such as [g] ). Switching in graphic display The display may be zoomed in or out by tapping the diagram.
Step 6: End of measurement, display/printout measuring results The end of the drying process will be indicated by an audio signal, provided this has been enabled in the menu (menu settings ), see chap. 10.1) whereupon heating will be turned off. The displayed control buttons provide the following options: Display of set drying parameters Saving measurement results, see step 7.
Sample protocols (KERN YKC-01): 62 DLT_N-BA-e-1421
Step 7: Save measurement results (max. 300 measurement results) Tap control button .. Enter data record name and designation and import by pressing . The database results will be displayed.
13 Call up / edit / delete measurement results 13.1 Calling measurement results Tap . Tap . The list of data records will be displayed. Select data record. Tap The selected measurement result will be displayed.
13.2 Changing / deleting measurement results Tap . Tap . The list of data records will be displayed. Highlight the data record to be edited by tapping or To highlight all data records, tap icon and select < Select all > Press to change drying parameters. Import changes with . or Delete data record with . To import query, press .
14 GLP Tap . Select desired setting. 1. Tap < Manual setup >. Selectable parameters: Id Balance Id Project Id User Tap the respective control button, the numeric input window will appear. Import entry with , the display returns to the previous screen. 2. Use this function to store several GLP users and to modify or to delete existing ones. Tap < Database >. The dropdown menu for data records will appear.
Tap and the input window will appear. Enter designation (max. 30 characters) and import by pressing . Then enter all the other parameters: Id Balance Id Project Id User To save new data record to database, press . The list of data records will be displayed. Highlight the data record to be edited by tapping or To highlight all data records, tap the icon and select . Press to change parameters. Import changes with .
15 General information concerning moisture analysis 15.1 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.
15.4 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.
15.
15.7 Drying temperature Bear in mind the following factors when setting the drying temperature: 15.7.1 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. 15.7.2 Colour of sample: Light-coloured samples reflect more heat radiation than dark ones and therefore require a higher drying temperature. 15.7.
15.8.
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.
16 Servicing, maintenance, disposal 16.1 Cleaning + Before any maintenance, cleaning and repair work disconnect the instrument from the operating voltage. + Only carry out cleaning tasks when the instrument has cooled down. 1. Display Do not apply cleaning agents containing solvents or abrasive ingredients. 2. Wind protection ring 3. Sample dish 4.
17 Instant help Fault Possible cause Display is not lit up. • The instrument is not switched on. • The rechargeable battery is empty. 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.
