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Summary of Contents for Precisa prepASH
- Page 1 Drying and Ashing Device Serial Number S/N: _________________________ Installation Date: _________________________ Precisa Gravimetrics AG 8953 Dietikon Switzerland...
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Page 2: Table Of Contents
Operating Instructions Precisa Contents INTRODUCTION ............................3 ............3 ENERAL NFORMATION ABOUT THE PERATING NSTRUCTIONS SAFETY ................................. 3 ......................3 EPRESENTATION AND YMBOLS ..........................3 AFETY INSTRUCTIONS DESCRIPTION OF THE DEVICE ......................4 ............................. 4 ROPER ........................4 TRUCTURE AND UNCTION 3.2.1... - Page 3 Operating Instructions Precisa 8.6.2 During the Measurement ....................... 27 8.6.3 Program End ..........................28 8.6.4 Saving the Results.......................... 29 8.6.5 Printing the Results ........................29 8.6.6 Log..............................30 ..........................31 REMOVAL OF SAMPLE CALCULATIONS ............................32 SCREEN SETTINGS / LANGUAGUE SELECTION ................. 33 FORMATTING ............................
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Page 4: Introduction
Introduction General Information about the Operating Instructions The prepASH 129 ashing and drying device is simple to use. Please read the operation manual carefully and thoroughly in order to understand and make the most optimum use of the many features and possibilities offered by prepASH 129 in your daily routine. -
Page 5: Description Of The Device
The max. permissible load of the integrated balance should never be exceeded, otherwise the balance may be damaged. If the ashing device is used in combination with other Precisa devices or with other makes of devices, it is imperative that you follow the instructions for the safe and proper use of the auxiliary devices. -
Page 6: Functions Of The Ashing Device
Precisa 3.2.2 Functions of the Ashing Device The prepASH 129 ashing device is simple to operate. It facilitates the quick and reliable drying / ashing of liquid, porous or solid materials. The device works using thermo gravimetric principles. The most important basic features of the ashing device include: •... -
Page 7: Controls And Connections
- Temperature: 5 °C – 35 °C - Relative humidity: 25 % - 85 %, non-condensing If you have any questions regarding the technical data or require detailed technical information about your ashing device, contact your local Precisa agent. Controls and connections 3.4.1 Front controls The touch screen (1) enables simple, menu-guided control. -
Page 8: Rear Controls And Connections
The exhaust gas hose must be fed outdoors in order to discharge harmful waste gases from the furnace chamber safely. CAUTION The pneumatic system for the prepASH must not be operated on pure oxygen (danger of a strong reaction between oxygen and oil). The oil-free compressed air can be connected to the maintenance unit (3). -
Page 9: Furnace Chamber
The balance pan (7) is inserted into a protective pipe. Optional Accessories Part Number Designation Quantity Comments PN 3950-066 Printer For printing out prepASH data PN 3950-065 Printer cable Connecting a printer to prepASH PN 3950-067 PC cable Connecting a computer to prepASH 340-7204... -
Page 10: Commissioning
Observe the following points when you unpack the ashing device in order to avoid damage: • Check the ashing device for any external visible signs of damage immediately after you unpack it. If you find that it has been damaged in transit, notify your Precisa service agent immediately. •... -
Page 11: Scope Of Delivery
Operating Instructions Precisa Scope of delivery Once you have unpacked all the parts, check that the delivery is complete. present yes / no Designation Ashing device Sample plate 30 crucibles Balance pan 2 sample holders Crucible tongs Mains plug... -
Page 12: Assembly And Connection
All the parts must be attached without exerting undue force. Do not apply any undue force. If you have any problems, the Precisa customer service representative will be happy to assist. The ashing device does not come fully assembled. Carry out the steps in the sequence outlined... -
Page 13: Gravimetric Calibration
Operating Instructions Precisa Touch button (1) to enter the user interface for drying and ashing (see section 5 "Software: First Steps" on page 13). Button (2) takes you to service mode for the device. Button (3) takes you to the formatting page. -
Page 14: Software: First Steps
(12 ”Configuration / Calibration” page35) prepASH Controls 5.2.1 Buttons You can switch between the main menu pages in the prepASH user interface by touching the arrow buttons. Unless otherwise described, these program instructions move along one page to the right every time. -
Page 15: Numerical Entry
Operating Instructions Precisa 5.2.2 Numerical Entry Numerical values need to be entered at various points in the program. The Numerical Entry window appears when you tap the relevant field or number which needs to be changed. The number entered appears in the white box. -
Page 16: Prepash User Interface
Precisa prepASH User Interface An existing program can be opened or new programs created on the prepASH user interface. 5.3.1 Display Bar The display bar appears at the very top of the user interface and always remains visible on the main menu pages. -
Page 17: Flow Chart
Operating Instructions Precisa 5.3.2 Flow Chart The sequence of the main menu pages is illustrated in the flow chart. User interface new or edit Open Program Select and open program Edit program steps Define results calculation Events after program-end Save Ref01.i... - Page 18 Operating Instructions Precisa Program Execution Automatic saving and printing Sample information Initial weighing/Group assignment Graphics setting Start page/Results printout Numerical control Ref01.i...
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Page 19: Program Selection
Operating Instructions Precisa 5.3.3 Program Selection If you touch the Open icon, the program selection appears. Select the program you require and open it by pressing the Open icon. 5.3.4 Program Editor The choice of control parameters for each stage of the program is described in detail in the Program Editor section (see section 6 "Program Editor"... -
Page 20: Program Selection
Switch from one step to another by touching the Step buttons. The program step currently set is shown in the graphic in a red box. During the program sequence, prepASH processes all the steps in order in which parameter settings have been edited and then automatically switches to the cool-down step. - Page 21 At the end of the step the program is interrupted and the hood is opened as soon as the chosen temperature has been arrived (see 7.3 Events on completion of the program). The sample disk can be taken out of prepASH and ashing addives given to the sample. Press "continue" to continue the program. The hood is closed automatically.
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Page 22: Graphical Setting
Operating Instructions Precisa 7.1.2 Graphical setting The time and temperature are input graphically by tapping in values with one of the bottom buttons. A double arrow appears on the graphic display. The selected parameter for the program section is changed by dragging the double arrow. -
Page 23: Calculating Losses And Residue
Operating Instructions Precisa Calculating losses and residue Define the way in which each result is displayed individually in the selection menu. Each result can be calculated as residue or loss, in terms of per cent, per mil or as an absolute amount in grams. The results may be relative to the starting weight (S, Sample) or to any earlier result (R1, R2, Residue). -
Page 24: Program Memory
Operating Instructions Precisa Program memory This method is saved on the flash card or EEPROM with the .paw extension. Touch the name box to activate it. Enter the file name and save it by touching the Save icon. Program Execution Sample Chamber Hood The sample chamber lid is opened by means of compressed air. -
Page 25: Sample Data
Operating Instructions Precisa Sample Data The data on the samples is entered in the sample table. Touch the balance icon to determine the tare weight of all the existing Tare crucibles. CAUTION The sample chamber hood automatically closes after the tare button is touched. -
Page 26: Weighing In
Operating Instructions Precisa Weighing in The selected sample can be assigned to a group. The measured data statistics can be saved via all the samples or a group-by-group basis. 1. Select the sample or sample 1. 2. Enter the sample name (if you haven't already done so via the table). -
Page 27: Selecting The Parameter Display In The Diagram
Operating Instructions Precisa Selecting the Parameter Display in the Diagram Parameter Display The temperature, power and gas flow parameters are displayed in real time in the diagram. They can also be hidden by tapping the appropriate buttons. The color of the weight display can be set for every sample. In order to do this, tap the color being changed. -
Page 28: Starting And Evaluating The Temperature Program
Operating Instructions Precisa Starting and Evaluating the Temperature Program 8.6.1 Starting Drying/Ashing Start the measurement by clicking on Start. CAUTION The sample chamber hood automatically closes after the tare button is touched 8.6.2 During the Measurement The current status of the parameters is shown in the display bar. The weight trend for the samples is recorded graphically. -
Page 29: Program End
(the last ones measured during the current program step). The temperature curve default can be changed during the measurement. In order to do this, scroll back to the prepASH user interface and then select the Program Editor. 8.6.3 Program End A sound is emitted to signal the end of the program, provided this setting has been selected in the program. -
Page 30: Saving The Results
Operating Instructions Precisa The measured data can now be saved, and the measurement log can be printed out (or this data may be automatically printed and saved if this setting has been defined). 8.6.4 Saving the Results After you touch the Save button, you are prompted to enter the file name. Once you have entered the file name, click on the Save button again in order to save it. -
Page 31: Log
The power can be displayed as an option. The prepASH program is described numerically in the second window. For this purpose the set time t(edit)), the actual duration (t(run)), and the temperature and gas settings, as well as the auto stop criteria are logged for each step of the program. -
Page 32: Removal Of Sample
Operating Instructions Precisa removal of sample After measurement, you may remove the samples for further analysis. There are now two possibilities: The sample is placed in the position closest to the front. Samples 1-19 are located in the outer circular row, samples 20-29 are in the inner circular row. -
Page 33: Calculations
Operating Instructions Precisa Calculations Sample = (Tare + Sample) – Tare Residue [g] = End weight [g] weight × Residue[%] Starting weight weight × Residue[ 1000 Starting weight Loss[g] = Starting weight [g] – End weight [g] − Starting... -
Page 34: Screen Settings / Languague Selection
Operating Instructions Precisa Screen settings / Languague selection The screen settings are opened by touching the switch surface. Log in by entering the password (Administrator: 83710). Date / Time The date is entered in the format dd.mm.yyyy; the time in the format hh:mm:ss. -
Page 35: Formatting
Operating Instructions Precisa Screen calibration Calibrate the Touch Screen using -ICON. Follow the instructions on the screen. Touch each cross until it fades away. By doing this, you are selecting the center and four corner points of the screen. -
Page 36: Configuration / Calibration
Operating Instructions Precisa Configuration / Calibration To activate Configuration and Calibration click on the surface switch You will be asked for your password (Administrator: 83710).. 12.1 Balance Calibration The balance is calibrated by the following steps. If the hood is closed, it can be opened using the next side. -
Page 37: Gas Adjustment And Hood Control
Open a valve by touching the corresponding switch surface. The effectively measured gas flow is indicated on the right. (Inlet pressure: Air 6 bar, O2 and N2: 3 bar) If necessary, regulate the flow of the valve (right hand side of the prepASH). Increase flow by turning anti-clockwise. Hood opening time: The program allows the user to select the temperature at which the hood is half-opened after the analysis. -
Page 38: View Control And Sample Colors
Operating Instructions Precisa 12.3 View control and sample colors Configuration settings of the display on the screen and print-out. Fading in or out of temperature, performance and gasflow curves Colors of the weight progress curves of the specimen 12.4 User control... -
Page 39: Calibration Report
12.5 Calibration report A calibration report is available on the next page 12.6 Temperature calibration Temperature calibration is password protected. Please consult a Precisa service technician. Maintenance and Service DANGER Disconnect the ashing device from the mains during all maintenance work (pull out the plug) and ensure that the device cannot be switched on inadvertently. -
Page 40: Airing
2 hexagon bolts in the corners of the cover from below close the cover by software disconnect the prepASH from the mains Important: pull the upper cover slightly forwards and tilt it back. - Page 41 Operating Instructions Precisa Cleaning the airing unscrew the airing and clean it mechanically. If needed also clean the prepASH side. The ceramic tube may be cleaned mechanically Reinstall the upper cover 10. Tilt the upper cover down on to the hood.
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