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COMPUTRAC MAX 1000 - Arizona Instrument LLC

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1. 47 10 PERFORMANCE ENHANCEMENT 48 LOM INTRODUCTION teere RR es 48 10 2 DETERMINING PROPER TEST TEMPERATURE 50 11 SAMPLE PREPARATION TESTING AND ANALYSIS 52 11 1 SAMPLE PREPARATION 52 11 2 OPTIMUM SAMPLE SIZE 52 CEIOUID S AMPLES ope ite SP apte 53 LEA VS ACCURACY Raita subs ded e c S e reed e 54 11 5 HIGH START TEMPERATURE SELECTION 54 12 13 14 15 16 17 18 19 20 21 PERFORMANCE VERIFICATION 55 121 WEIGHT LEST xxv ex xe nt Reo deletes oats ERA 55 12 2 PRECISION WEIGHT 5 56 123 SODIUM TARTRATE TEST 56 12 4 PRECISION TARTRATE 5 57 12 5 RETAINEDSAMPLES 58 ROUTINE MAINTENANCE 59 13 1 CHAMBERINTERIOR 59 13 2 HEATER CLEANING e eamus 59 I3 3 SAMPERE PAN SUPPORT 61 TROUBLE DIAGNOSIS 62 TROUBLE MESSAGES Sete he
2. 18 4 10 ENABLE PRINTER 19 4 11 DATA OUTPUT TO A COMPUTER 20 5 MENU SYSTEM INSTRUMENT CONFIGURATION AND OPERATION 21 7 MENU KEY ACCESSING THE MAINMENU 24 7 2 MEMORY START MENU xam ex ag Ve eR NC 25 7 2 ADD EDIT MEMORY START 26 SSAMPEENAMEL n edd t sa Sar tote 26 l TEMPERATURES reote we 26 gt Test Temp rature AER LS REC 27 gt Histart Temperature 27 Idle Temperatur o a sien MP xs XO XV VEN EE 28 b gt Start Temp ue os Gee ee oh OV ESE EN 29 ENDING CRITERIA sees 29 gt End Test on Prediction 30 Rate 30 SAMPLE SIZE OPTIONS rie lee bea IDE EAS 31 bated age he ati mu aL at E 32 F Pans Tare Options 24 hike tae nl can sien Pees 32 gt Sample Tate Option 34 RESULT DISPLAY OPTIONS 35 7 2 2 REORDER MEMORY START 35 7 2 3 DELETE MEMORY 35 7 2 4 PRINT MEMOR
3. ee 64 SPECIFICATIONS age ets uet y S dates 66 ACCESSORIES amp MAINTENANCE PARTS 68 APPENDIX A rss emus e SWR v arti esos altos cata ue 69 18 1 PARAMETER DEVELOPMENT CHEMICALS INDUSTRY 69 APPENDIX B Rc Rn ete RR eadem rae ace a nte E 72 19 1 PARAMETER DEVELOPMENT FOODSINDUSTRY 72 WARRANTY a bale Wot Vet ut DE EI EL Iu 74 MAINTENANCE 75 1 INTRODUCTION The Arizona Instrument MAX 1000 is a high performance moisture analyzer It uses the proven loss on drying method to detect the volatile content of a sample of test material The instrument uses Arizona Instrument s pioneering prediction method of automatically ending a test to provide accurate results in the shortest possible time Caution The MAX 1000 uses a delicate and very sensitive force balance to weigh samples and record very small weight losses The balance is capable of measuring weight to a resolution of 1 milligram over a sample weight range from 1 gram to 40 grams Careful handling is necessary to prevent damage to the balance With proper care the instrument will provide years of dependable service Typically the instrument result is precise to better than 2 0 CV coefficient of variation from 0 100 100 It will test at temperatures from room temperature to 225 C contr
4. 46 9 MISCELLANEOUS MENU MESSAGES 9 1 9 2 CONTROL PROGRAM VERSION NUMBER For troubleshooting purposes AZI Customer Service may need to know the version or revision of the control program running in your instrument To display this information turn the power off wait a second and turn it on again Observe the front panel The program version number will be displayed in the lower center portion of the screen while the AZI logo is displayed DIAGNOSTIC FAILURE MESSAGES The MAX 1000 contains extensive diagnostic software which monitors the performance of the instrument If a dangerous or abnormal condition is detected the instrument turns off power to the heater ends operations locks the keyboard and displays the following message SYSTEM ERROR A brief description of the problem Software Halted Power off gt on to reset If cycling the power switch does not clear the error stop using the instrument and call AZI Customer Service 800 235 3360 or 602 470 1414 47 10 10 1 10 1 1 10 1 2 10 1 3 48 PERFORMANCE ENHANCEMENT INTRODUCTION The MAX loss on drying moisture analysis system takes advantage of computer technology to reduce test times and increase precision over standard vacuum oven or convection oven drying procedures The sample is added to an aluminum sample pan sitting atop an electronic force balance within a test chamber As the sample heats and loses weight due to moisture
5. From the MAIN MENU the following functions are available MEMORY START MENU is used to make changes to stored parameter sets ADD EDIT MEMORY START REORDER MEMORY START DELETE MEMORY START PRINT MEMORY START STORED DATA MENU is used to work with data from past moisture determina tions VIEW LAST TEST DATA PRINT LAST TEST DATA CALIBRATION MENU is used to run balance and heater calibrations BALANCE CALIBRATION PRINT BALANCE CAL REPORT SETUP MENU is used to change instrument default setups PRINTER SETUP REPORT SETUP CLOCK SETUP DATA FORMAT SETUP ACCESS KEY SETUP 7 2 To select a menu item move the selector bar down the displayed list to the function using the up or down arrow keys If the list is longer than the screen space a down arrow will be displayed at the far right bottom of the screen If the bottom of the list is shown and options exist above the top of the display an up arrow will be displayed at the top right The selected option is displayed at the top of the screen as a reminder Press the Selct key to begin your selection or the Esc key to return to the previous menu level MEMORY START MENU This menu accesses and changes the stored parameter sets At the FINAL TEST screen press Menu to get the MAIN MENU Select MEMORY START MENU and press Selct MEMORY STRRT MENU ADD EDIT MEMORY START REORDER MEMORY START DELETE MEMORY START PRINT MEMORY STARTS Figure 16 MEMORY ST
6. key at the DATA or FINAL TEST screen Memory start parameter sets numbered 02 though 06 are programmed by using the Menu options to configure the instrument as needed and to store and label the selected memory start parameter set See Menu key Accessing the MAIN MENU below To begin a test with a stored parameter set access the MEMORY START MENU by pressing the Memry key at the FINAL TEST screen Move the selector bar to the desired item with the up and down keys and press the START key Unless the LOT NUMBER function is selected see DATA FORMAT SETUP page 42 the test will start immediately using the parameters stored under the selected label 23 24 MENU KEY ACCESSING THE MAIN MENU At the FINAL TEST screen pressing the Menu button will display the main level MAIN MENU of the menu system If Access Code MEMORY START MENU control is active a screen asking for the Grp ELS MENU access code will appear prior to any edits SETUP of the stored parameters EENENLCCEENET3UT When the screen prompts for the access code use the arrow keys to select the access code letters When the last letter is entered the menu will appear if the access code entered was correct or you will be returned to the original display screen See the section below on access control for more details Figure 15 THE MAIN MENU The list on the screen will show the menu branches available at any point
7. PRINT menu page 40 Moving the selector bar to a particular test and pressing Selct changes the screen to a display of the entire stored test result PRINT STORED DATA Stored data can be printed to a parallel printer attached to the MAX 1000 see page 18 That same data can also be routed to a computer page 20 To print stored data select that option on the STORED DATA MENU and press the Selct key STORED DATA MENU VIEW STORED DATA PRINT STORED DATA Figure 36 PRINT STORED DATA 7 4 7 4 1 CALIBRATION MENU CALIBRATE BALANCE This process will span calibrate the balance The balance should be calibrated once per month whenever the instrument is moved or whenever a problem is suspected Calibration requires a clean dry sample pan and a 20 gram calibration mass The screen prompts you to have both available before beginning the calibration process CALIBRATION MENU PRINI BALANCE CAL REPORT Figure 37 BALANCE CAL Best results are obtained if the MAX 1000 has been powered up for at least 30 minutes and with the chamber at room temperature stablized at 80 C A vibration free table will speed the calibration process since the balance will stabilize more quickly if it is not subject to vibration To calibrate Selct BALANCE CALIBRATION and follow the menu prompts on the display Press the down arrow to begin the calibration procedure The first prompt is to OPEN THE LID
8. key any time to begin test with the altered parameter values Figure 52 PARAMETER MENU Details on how to change any parameter can be found in the MEMORY START MENU section beginning on page 25 One example changing the temperature setpoint is given below 8 1 CHANGING THE TEMPERATURE SETPOINT 8 1 1 Temperature is one of the parameters changed most often To change the temperature setpoint from the MAIN MENU press the Param down arrow key Enter the access code if requested Successfully entering the correct code will then bring up the PARAMETERS MENU START window 8 1 2 Move the selector bar to TEMPERATURES with the arrow keys and press Selct The next window with TEMPERATURES at the top lists the three options Use the arrow keys to change the TEST TEMPERATURE setpoint to the desired value Move the cursor off the end of the temperature value by pressing Quit to complete the process and press Accpt to record the new value Press Esc to return to the previous menu 8 1 3 See the section on TEMPERATURES on page 26 for more details on changing the other OPTIONS on this screen 45 8 1 4 The word START in the title means that START can be pressed while in this menu and the test will begin using the parameters as they have been altered by the user This parameter set is automatically saved under the title CUSTOM in the Memory Start list See the section entitled MEMORY START MENU on page 25
9. minute Sample name Lot number or product ID Aluminum sample pans Filter paper UL listing pending CE certification pending Nitrogen purge fitting Dot matrix printer 20 g Balance calibration weight 3g and 5g weights Tweezers User s manual Power cord 67 17 ACCESSORIES amp MAINTENANCE PARTS MAX 1000 Moisture Analyzer CONSUMABLES 990 0008 990 0010 990 0003 SPARE PARTS 690 0003 690 0004 690 0007 690 0012 360 0164 170 0014 190 1001 190 1002 200 0002 200 0003 200 0008 200 0021 200 0026 360 0164 300 0106 300 0114 300 0135 300 0129 300 0176 355 0179 355 0073 355 0074 355 0075 355 0079 600 0140 600 0105 990 0044 SS 188 600 0131 Waffle Bottom Sample Pans 100 PCS 68 Accessories amp Maintenance Parts Flat Bottom Sample Pans 100 PCS Filter Paper 100 PCS 3g Weight 5g Weight 20g Weight Tweezers RTD Alignment Gauge Fan 8 Amp Fuse 4 Amp Fuse Power Cord Power Cord British Standard 220V Power Cord Continental Europe 220V Optical switch Cable Assembly RTD Cable Assembly RTD Alignment Gauge Inside Shroud Gasket Outside Shroud Gasket Keypad Damper Spring Mandrel LCD Module Pan Support Torsion Spring RH Torsion Spring LH Mandrel Torsion Spring RH Gas Spring Retrofit Spring Kit Printer Cable 6 Printer MAX 1000 User s Manual Force Balance Factory Repair 18 APPENDIX A 18 1 PARAMETER DEVELOPMENT CHEMICALS INDUSTRY Follo
10. produce lifting force on the balance Install the pan support Connect the nitrogen purge lines if used page 15 Connect a printer if used page 17 Connect a computer if used page 20 Ensure the AC power receptacle is set for the correct voltage 120 or 240 VAC page 13 The MAX 1000 will draw up to seven 7 amps Ensure the instrument is plugged into its own DEDICATED and GROUNDED electrical power outlet Do not put it on a circuit with motors blenders heaters coolers grinders or other high current electrical devices However a low current less than one amp device would be safe Turn the instrument on by pressing the switch on the back of the analyzer above the power receptacle Adjust the contrast as necessary to view the screen display The MAX 1000 is now ready for use 2 2 2 2 1 2 2 2 2 3 2 3 1 INSTRUMENT FAMILIARIZATION Before beginning the first moisture analysis allow the instrument to warm up for 30 minutes After this warm up calibrate the balance using a clean sample pan and the 20 gram weight provided See CALIBRATE BALANCE on page 37 To become familiar with the instrument and to ensure proper calibration run a weight test Select the pre programmed WEIGHT TEST memory start Use the five gram and three gram weights supplied with the instrument Start a test by pressing the START key When commanded to Load Sample put both weights on the sample pan After the MAX
11. the moisture level of the sample The MAX 1000 is an extremely flexible instrument This flexibility means that some time is required to determine the best set of parameters for a particular application The determination of the proper parameters requires a series of tests and good laboratory procedure AZI Sales and Customer Service personnel are trained to help in this process If any questions arise please call 800 235 3360 or 602 470 1414 for assistance DETERMINING PROPER TEST TEMPERATURE To decide the proper test temperature for a particular sample prepare a moisture versus temperature curve Sample material is tested at increasing temperatures usually in five or ten degree increments If the moisture concentration of the sample material is known as determined by a reference method vacuum or air oven then the MAX 1000 s temperature can be adjusted until test results correlate with the established moisture concentration The starting temperature is usually the standard or reference method temperature for that particular sample Results for each increasing temperature will usually rise to a plateau where several increasing temperatures do not change the results significantly Beyond this plateau results rise dramatically Figure 54 Examination of the tested sample shows burning or charring Results along this plateau usually correlate well with the standard or reference method results Repeated testing should be done at tempe
12. 1000 has finished weighing the sample and the DATA DISPLAY appears open the lid and remove the smaller weight Wait for the test to end The indicated weight loss percentage should be 37 500 020 for a test using the five and three gram weights MAX1000 Moisture Analyzer CONTRAST Ma31888 Copyright 1996 firizona Instrument Version 3 62A Figure 2 MAX 1000 OPENING SCREEN TEST PROCEDURE This section on TEST PROCEDURE briefly describes the steps in running a test on a product sample For a more complete description on testing and sampling see the PERFORMANCE ENHANCEMENT section that starts on page 48 CAUTION Mechanical stops offer some limited protection to the balance mechanism from overload damage caused by vertical forces To prevent damage to the balance use care not to push pull or bump the sample pan support excessively 2 3 2 2 3 3 2 3 4 2 3 5 2 3 6 Obtain a sample of test material and transport it in an airtight container to prevent moisture gain or loss through contact with the atmosphere If the instrument has already been configured for your test material simply place a clean sample pan on the pan support press START and follow the instructions displayed on the screen See later sections of this manual for detail on testing a new material page 48 PERFORMANCE ENHANCEMENT and storing the test setup for future use page
13. 2 grams to 39 grams TARE OPTIONS RESULT DISPLAY OPTIONS The sample size should be fairly consistent 1 5 0 Down for all tests on a particular product in order to get the best standard deviation possible When the values for the optimum sample Figure 27 SAMPLE SIZE OPTIONS size and the minimum and maximum range are set an audible beep can be programmed to indicate when the sample is too small or too large as it is being loaded TEMPERATURES ENDING CRITERIA SAMPLE SIZE OPTIONS These values are also used in the horizontal weight scale that is displayed when sample is being added Use the SAMPLE SIZE OPTIONS menu to program this feature To program this information select SAMPLE SIZE OPTIONS SAMPLE SIZE OPTIONS and press the key labeled Selct To enter or change SAMPLE WINDOW 1 09 an optimum sample size select SAMPLE INSIDE LIMITS TWO BEEPS OUTSIDE LIMITS NO BEEPS jEdit L Figure 28 SAMPLE SIZE 31 32 SIZE and press the key marked Edit Press the Incr or Decr key to change the value When the desired value is displayed press the Accpt key to record the change or to cancel the change and revert to the previously stored value Next enter the SAMPLE WINDOW following this same procedure Finally select none one or two beeps to sound when sample size is within the programmed range High volatile materials such as coatings typ
14. 235 3600 or 602 470 1414 73 20 WARRANTY Arizona Instrument Corp warrants the Computrac MAX 1000 to be free from defects in materials or workmanship for one year from the date of purchase AZI will repair or replace at its option products which AZI determines to be defective during the warranty period All defective parts replaced by AZI become the property of AZI Replacement parts are warranted for the remaining portion of the effective warranty period This warranty does not apply to expendable or maintenance items such as pans and pan supports The above warranty does not extend to any product which has been subjected to misuse abuse neglect accident improper application modifications or service performed by persons other than AZI s own service representatives power surges or spikes negligence in use maintenance storage transportation or handling or an act of God If a MAX product is defective in workmanship or materials the owner s sole remedy shall be repair or replacement of the defective part or parts as provided above Under no circumstances shall AZI be liable in any way to the owner or any user for any damage including but not limited to any loss of business or profits or any other direct indirect special incidental or consequential damages whether or not foreseeable and whether or not based on breach of warranty contract or negligence in connection with the sale of such products Some states do not allow
15. Figure 5 MAX 1000 ASSEMBLED HEAT TABLE 4 1 1 Open the lid by lifting the handle just above the display CAUTION Excess pressure can damage the force balance 11 12 NOTE The white foam disk that is found on top of the chassis and held in place by three tapered pins on the heat table is there for insulation DO NOT REMOVE IT Remove the balance cover balance adaptor assembly from its packing box TRAY SUPPORT The pan support is in the top opening of the balance cover The balance adaptor is below the balance cover and aligned with the pan support Test the fit between the balance adaptor and the pan BALANCE ADAPTOR support to be sure it is snug See Figure 6 BALANCE COVER Figure 6 ADAPTOR SUPPORT ASSEMBLY Align the holes in the bottom of the balance cover with the pins on the heat table Allow the balance adaptor to gently drop through the hole in the heat table and into place on the tapered force balance shaft Gently align the balance cover to the tapered pins and press into place Check the clearance between the pan support arms and the balance cover by observing the space between the arms and the balance cover The clearance should be about one millimeter If the clearance is considerably different than one millimeter or the pan support appears to be crooked then call AZI Customer Service 800 235 3360 or 602 470 1414 4 2 AC POWER CONNECTION Figure 7 MAX 1000 REAR VIEW Labeled Voltag
16. Repeat the tartrate test again using a clean sample pan for each of the five samples and analyze the results 57 12 4 5 12 5 12 5 1 12 5 2 12 5 3 12 5 4 12 5 5 12 5 6 12 5 7 12 5 8 58 If the mean is still out of tolerance call Arizona Instrument Customer Service for assistance RETAINED SAMPLES The weight test and the sodium tartrate test are usually sufficient to satisfy industry guidelines for quality control in moisture measurement Some additional checks can be performed using replicate testing of retained samples Retained samples when stored under airtight conditions should maintain moisture levels for long periods Daily testing of these samples should produce the same results day after day Retained samples further verify the unit s operation on the customer s own product Let the system warm up for 20 minutes Set the MAX 1000 to the optimum test temperature for the retained sample or use the ID Number of a test which has been stored in memory Place a clean aluminum sample pan onto the pan support in the test chamber Close the lid and push the START key When the OPEN LID display appears GENTLY add the optimum amount of retained sample evenly across the sample pan Close the lid and allow the test to continue Record the final result in the quality control log The MOISTURE results for the retained sample should fall within the established acceptable range of results for that sam
17. The weight test should be the basis for a daily quality control verification of the MAX 1000 and should be the first test performed every day In addition if there is any concern about the accuracy of the instrument these same tests may be performed to evaluate instrument performance WEIGHT TEST This test simulates moisture content with the removal of one of two known weights The test is run with specific parameters which are stored under Memory Start 00 See the section on MEMRY START selections on page 23 From The FINAL TEST screen press Memry key If the highlight bar is not already there use the up and down arrows to select 00 ID WEIGHT Place a clean empty sample pan on the pan support Close the lid and press the START key When the OPEN LID appears on the screen open the lid and carefully place both a 5 gram and a 3 gram weight near the center of the sample pan Close the lid After the testing screen is displayed gently open the lid and carefully remove the 3 gram weight Wait for the end of the test 55 12 1 9 If this is the first test of the day discard the results of this test for stability reasons 12 1 10 Record the final result The value should fall between 37 48 and 37 52 12 1 11 Ifthe results do not meet this criteria a weighing error has occurred 12 1 12 The most common causes of such errors are bent or dirty sample pans debris falling into the balance shaft interfering with
18. and heater after cleaning Small Phillips head screw driver if you elect to remove the shroud RTD alignment gauge AZI p n 360 0164 NOTE An oven cleaner such as Easy Off should not be used on the aluminum shroud as it is corrosive and will pit the aluminum 1 Turn the unit off and unplug the Computrac Ensure the unit has cooled down to ambient temperature Remove the pan and use the supplied tweezers to pop the pan support up and out of the test chamber Be careful excess force on the 59 60 balance could result in costly repairs Cover the pan support hole in the bottom of the chamber with masking or other similar tape Carefully mark the RTD with a permanent marker on the inside of the shroud and on the outside of the clamp to mark the relative RTD position in the heater 2 Remove the shroud to provide the maximum cleaning benefit Remove the four evenly spaced small screws located on the outside of the shroud holding it in place Carefully slide the RTD out of the shroud Take care not to pull the RTD wires out of the heater box while removing the shroud 3 Lightly spray the shroud with cleaning solution and allow it to stand for several minutes Scrub with the stiff bristle brush Repeat if necessary to remove layers of accumulated buildup Rinse under warm water and dry 4 Prepare the heater box by placing paper towels around the elements Lightly spray the front face of the heater box and allow to stan
19. of sample OPTIMUM SAMPLE SIZE Each particular sample will have its own optimum sample size Best results will be obtained if the sample consists of a single layer of particles as long as this is sufficient to develop a weight loss of 10 milligrams or more A rule of thumb is the lower the moisture the larger the sample Low moisture samples less than 0 100 such as chemicals or plastics require larger amounts of sample 20 to 30 grams The larger sample size is necessary to provide sufficient weight loss information to the microprocessor A larger weight change between the initial and final sample weights will give more accurate repeatable results Smaller samples will give faster tests Generally it is best to use a thin layer that just covers the surface of the pan Very light or very expensive test materials may require samples weighing as little as 100 milligrams Be aware that the standard error will be larger for samples this small unless the moisture content is sufficient to cause a weight change of 10 milligrams or more for each test If the first prediction is too low increase sample size If it is too high try decreasing sample size or lowering the temperature 11 2 2 11 3 11 3 1 11 3 2 11 3 3 11 3 4 The sample should be added evenly in a thin layer across the entire surface of the pan Once the desired amount has been added the pan can be removed from the test chamber to evenly distribute the sample T
20. period the sample s weight loss is closely monitored to detect when the evaporation rate has decreased to a point where the cooling effect is lost To prevent sample burning the unit drops the temperature to the lower setting for slower drying The higher beginning test temperature speeds the sample through the A C portion of the drying curve The lower ending temperature takes the sample through the exponential portion C D of the curve where an accurate prediction of the moisture concentration can be made See the section on HISTART TEMPERATURE page 54 for procedures on determining the ideal temperatures Page 27 gives information on programming these values into the MAX 1000 49 10 1 8 10 1 9 10 2 10 2 1 10 2 2 10 2 3 50 During the entire testing process the microprocessor monitors the sample s weight loss The sample s decreasing weight is compared to the initial sample weight and the calculated moisture concentration will appear on the display Simultaneously the microprocessor is predicting a final moisture concentration based upon the sample s rate of weight loss compared to the exponential portion of a standard drying curve Testing will continue until the predicted moisture concentration agrees within a certain percentage of the actual moisture concentration appearing on the display The percent agreement between the predicted and the actual moisture concentrations will vary depending upon the system s programming and
21. press the Edit key to allow the selection to be changed Press the Incr key or Decr key to change the selection between LPT RS 232 and Both When the correct port selection is displayed press the Accpt key to lock the selection into the MAX 1000 parameters Select both ports if the output is to be directed to both the printer and the RS232 serial port for computer communications Move the select bar to AUTO FORM FEED and press the Toggle key to select between OFF and ON When the correct selection is displayed press the Esc key two times to return to the OPENING MENU 4 10 4 10 1 4 10 2 4 10 3 4 10 4 4 10 5 4 10 6 4 10 7 4 10 8 ENABLE PRINTER OUTPUT With the OPENING MENU displayed press the Menu key to display the REPORT ENABLED MAIN MENU Go down to the SETUP REPORT START TESI END REPORT INTERVAL 82 Seconds menu and press Selct Highlight REPORT SETUP and press Selct again With REPORT CONTROL OPTIONS highlighted press Selct again With REPORT Print ENABLED Figure 11 REPORT ENABLED highlighted press the Toggle key to select between YES and NO Select YES to send the test results to the printer and NO to stop results from being sent to the printer Select REPORT START and press the Edit key Press the Incr or Decr keys as necessary to select either START TEST Ist PRED first prediction or TE
22. run a syringe test highlight SYRINGE TEST in the DATA FORMAT SETUP menu and toggle to ON Return to FINAL TEST screen and press START to run a test as you normally would REMEMBER TO RECORD THE WEIGHT OF THE SYRINGE WITH THE SAMPLE IMMEDIATELY BEFORE LOADING Load the sample onto the sample pan and immediately re weigh the syringe The instrument will ask you to enter this weight as a new start weight at the conclusion of the test If you have forgotten to record the manual start weight the instrument will provide results based upon its normal automatic weighing feature ACCESS KEY SETUP The MAX 2000 provides the customer with the ability to enter access codes to prevent unauthorized user s entry into ACCESS KEY SETUP any menu where data can be edited ifi i i EDIT MASTER KEV modified or deleted AII information OTER EE menus can be accessed viewed and EDIT PARAM HEV2 EDIT PARAM KEY3 printed by any user To enable this option select ACCESS KEY SETUP in Esc Toggi Down _ the SETUP MENU Once in the ACCESS KEY SETUP MENU highlight ACTIVATE KEYS and toggle Figure 51 ACCESS KEY SETUP yes A master key code permits access to all menus whether they are controlled by individual key codes or not If the master key code is forgotten call AZI Customer Service at 800 235 3360 or 602 470 1414 To enter or edit the master key code highlight EDIT MASTER KEY and press Edit Use the arrow k
23. test chamber and place it onto a flat surface Grasp part of the filter paper tweezers are suggested and flip it over so that the sample lies between the pan and the paper Squash the sample with a flat bottomed glass or jar to a uniform layer Return the sample pan to the test chamber and close the lid The upper filter paper surface absorbs moisture from the sample and prevents spattering to produce more accurate reproducible results The glass fiber filter paper may be pre dried before use in some applications Several sheets can be dried in a MAX 1000 Test at 150 C with the END TEST ON PREDICTION After drying store the filter paper in a desiccator to prevent the absorption of ambient humidity Waffle bottomed sample pans are not recommended for use with filter paper The liquid sample may soak through the filter paper and collect in puddles in the pan s depressions Contact AZI Customer Service to order flat bottom pans AZI part number 990 0010 53 11 4 11 4 1 11 5 11 5 1 11 5 2 54 SPEED VS ACCURACY The shortest possible test time using automatic prediction based ending criteria is one minute This is a result of the time required to compute the prediction Normally if the sample size is optimum and no interfering volatiles are present two minute tests produce optimum accuracy HiGH START TEMPERATURE SELECTION Once the base start temperature has been determined it may be possible to utilize the HISTART
24. 25 MEMORY START MENU For the test set the temperature to an appropriate value for your first sample If you are using a reference method such as an air or vacuum oven use the same temperature for this first sample determination test Continue as before by installing a clean dry sample pan and pressing START When LOAD SAMPLE appears on the display add sample For best results if the instrument displays LOAD SAMPLE but the balance stored a tare weight greater than 0 1 gram press START key again If it will not zero quit the test and start again Load the sample taking care to distribute it evenly across the width of the pan to get the fastest and most accurate results To load difficult samples more easily remove the sample pan from the instrument after the sample has been placed on the pan and place it on a work surface Spread the sample as required Then replace the loaded sample pan on the pan support and close the cover To initially determine performance on a given product under a given set of test conditions repeat each test five or more times to obtain reliable information about the standard deviation of a typical result The most recent test result is automatically stored Select Menu from the front panel of the TEST DATA screen then go to the STORED DATA MENU 3 SYSTEM DESCRIPTION 3 1 3 2 3 3 HARDWARE The MAX 1000 is a high performance loss on drying moisture analyzer It consists of
25. ARIZONA INSTRUMENT LLC v ma instrument LLC USER MANUAL COMPUTRAC MAX 1000 MOISTURE ANALYZER OPERATION MANUAL July 1996 Firmware Revision 3 03A ARIZONA INSTRUMENT LLC 3375 N Delaware Street Chandler AZ 85225 USA 800 528 7411 602 470 1414 f 602 281 1745 www azic com Email General azi azic com International intl azic com Customer Service support azic com 3375 N Delaware St Chandler AZ 85225 800 528 7411 sales azic com www azic com MADE IN THE USA AZI P N 700 0003 B SS 187 B Last update July 1996 Computrac MAX 1000 User s Manual PROPRIETARY RIGHTS NOTICE The material in this manual contains valuable information developed by Arizona Instrument Corporation for use with the Computrac line of moisture analyzers No part of this manual can be reproduced or transmitted in any form or by any means electronic mechanical or otherwise This includes photocopying and recording or in connection with any information storage or retrieval system without the express written permission of Arizona Instrument Corporation ALL RIGHTS RESERVED Copyright 1996 Arizona Instrument Corporation iv PACKING and SHIPPING INSTRUCTIONS The MAX 1000 uses a delicate and very sensitive electronic force balance to measure small weights and weight losses Movement handling and packaging of the instrument must be done with EXTREME CARE to avoid permanent expensive damage inter
26. ART MENU Selecting any option from the MEMORY START MENU brings up the list of stored parameter sets They are sequentially numbered from 00 to 06 Note that 00 ID WEIGHT and 01 ID TARTRATE are factory set in non volatile memory and can not be changed In addition 06 ID CUSTOM can be changed through this menu or using the Param key at the FINAL TEST screen To change a set of parameters select the number line to be changed and press Selct This will bring up the EDIT TEST PARAMETERS screen The sample parameters shown on this menu are the same as on the PARAMETERS MENU START shown on page 45 but a test can not be started directly from here 25 7 2 4 ADD EDIT MEMORY START Used to alter or create a stored parameter set EDIT TEST PARAMETERS Used to change the following parameters SAMPLE NAME Enter an alphanumeric ID for this test TEMPERATURES Change test histart and idle temperature set points ENDING CRITERIA Change automatic test end methods SAMPLE SIZE OPTIONS Change minimum and maximum sample size allowed TARE OPTIONS Select tare method parameters RESULT DISPLAY OPTIONS Select moisture solids or dry weight basis SAMPLE NAME To change the sample name for a parameter set select SAMPLE NAME EDIT TEST PARAMETERS and press Edit The cursor will be positioned at the first character of the CRPEDNIA name Press and hold the Incr or Decr TONEDE RETOR keys until the desired symb
27. After placing a clean pan on the scale and closing the door the screen will indicate that the unit is taring As soon as the tare is finished the next OPEN THE LID prompt will appear As the lid is opened the screen prompt requests that a 20 gram calibration weight be placed gently on the center of the sample pan Do not press down on the scale but just place the weight on the pan With the 20 gram weight in place gently close the lid CALIBRATING BALANCE OPEN THE LID Figure 38 OPEN THE LID CALIBRATING BALANCE PLACE 2 g CAL MASS ON CENTER OF PAN HANDLE CALIBRATION MASS CAREFULLY CLOSE LID TO 66 608 J CEA La lS eS E Figure 39 BALANCE CAL CON T 37 7 5 7 5 1 38 As the MAX 1000 calibrates itself the screen displays the CALIBRATING PLEASE WAIT message For best results the unit should not be moved jarred or otherwise disturbed in any way during this calibration time As soon as the calibration is complete the screen prompt asks that the 20 gram weight be removed If the weight is recorded as 20 000 0 003 mg the calibration passed and the MAX 1000 is ready for use If the weight is recorded out of this range then the calibration is unsuccesful In this case rerun the calibration If the calibration fails again then contact AZI Customer Service 800 235 3360 or 602 470 1414 SETUP MENU The SETUP MENU is u
28. Customer Service Call AZI Customer Service Check display for LID OPEN message when open Raise temperature above room ambient or standby temperature SYMPTOM No power to instrument No weight reading displayed Erratic results Display erratic Unit resets and alarms during a test UNDERLOAD when START pressed Instrument won t tare DIAGNOSIS Fuse blown Power switch off Power cord disconnected Outlet not powered Balance not initialized Poor AC ground Dirt in chamber pan support Unit cold near freezing Lid open for an extended period of time during test Sample pan or pan support not in place Test chamber temperature fluctuates changes Dirt in test chamber or under pan support REMEDY Remove and test fuse Check switch position Confirm power cord seating Test circuit with lamp Turn power off then on wait 15 seconds Ensure grounding from case ground to earth ground Clean unit Allow to warm up Turn switch off and on Install pan and or support Quit test and press START again Allow system to stabilize Clean 63 15 TROUBLE MESSAGES Messages appear on the display screen when certain internal problems occur You will probably never see one of these messages However if one should appear the message and its meaning are provided in the following BAD EPROM CHECKSUM Probable causes Action SRAM Probable cause Action HEATER RUNAWAY
29. LT TYPE Moisture solids or dry weight basis TEST MODE Ending criteria used for this test START WT Sample basis weight END WT Sample weight at the end of the test TEST TIME Minutes and seconds the test was in progress START TEMP Temperature of the chamber when the test started TEST TEMP Test setpoint temperature HISTART TEMP HiStart temperature setpoint PAN TARE Pan tare setting SAMPLE TARE Sample tare setting SAMPLE CENTER Nominal load weight SAMPLE WINDOW Acceptable load weight END REL Reliability ending criterion value at the end of the test REL TGT Target reliability used for PREDICTION ending criteria END STAB Stability ending criterion value at the end of the test STAB TGT Target stability used for PREDICTION ending criteria END RATE Rate ending criterion value at the end of the test RATE TGT Target rate used for RATE ending criteria To change any of the optional items move the selector bar to the item wanted To change the option press the key marked Toggle When finished press the key marked Esc The new selections are now stored in the system REPORT SETUP REPORT CONTROL OPTIONS REPORT ITEMS TO PRINT ENTER EDIT COMPANY NAME Vo LESC Select Up This function allows report headers to be customized to show the name of the test location or other alphanumeric material The default value is ARIZONA INSTRUMENT CORP Figure 47 ENTER EDIT CO NAME Once
30. Nalge 8000 0020 VWR 63015 368 Connector 1 8 I D 1 4 O D gt Nalge connector 6152 0250 62850 060 or Any suitable 1 8 I D 1 4 O D connector Connect the regulator to the gas source cylinder per the regulator manufacturer s instructions Use tubing to connect the outlet of the regulator to the connector 4 7 4 Connect tubing from the connector s two outlets to the fittings on the rear of the unit 4 7 5 Check that all fittings are gas tight and secure Pressure should be deferred until the start of a test to conserve gas use Flow rates between 4 and 5 psi are sufficient Figure 9 shows the nitrogen purge setup Regulator Connector Cylinder Shut off Valve Figure 9 NITROGEN PURGE SETUP 4 8 OUTPUT TO PRINTER An optional data printer is available from AZI pictured is printer example only It connects to the printer port at the rear of the instrument This port is a standard PC parallel printer port so standard printers and cables can be used The content of each message to be printed can be custom configured from the menu system Normally messages are only printed at the end of a test but other types of reports are available from the menu These same messages can also be directed to the RS 232 serial port at the back of the instrument 17 4 9 4 9 1 4 9 2 4 9 3 4 9 4 4 9 5 4 9 6 4 9 7 4 9 8 18 ATTACHING AND CONFIGURING THE PRINTER Unpa
31. Probable causes Action HEATER FAILURE Probable cause Action 64 The EPROM is continuously checked against a pre calculated CHECKSUM to insure against failure This message appears if a discrepancy is detected Bad EPROM chip Replace U4 SRAM chip is continuously checked for proper operation during program execution Message generated if error in SRAM detected Bad SRAM chip Replace U3 Message is generated if the lid is closed and temperature exceeds 290 C for 3 seconds It is also generated if the lid is open and the temperature does not decrease according to an exponential model Failed triac or triac driver probably both Alarm can sometimes be generated spuriously if ambient conditions prevent normal cooling of the heater when lid is up wind currents blowing heat back on the RTD Insure actual failure has occurred If not reset system Troubleshoot heat control system Message is generated if the heater does not reach the set temp in a prescribed period of time varied with set temp based on heater model or starting test with low test temperature at ambient temperature Failed heat control system Power unit off and back on and attempt second test Troubleshoot heat control system and or troubleshoot heater wiring TEMPERATURE CIRCUIT Probable cause Action A D TIMEOUT Probable cause Action INTERRUPT STARTUP Probable cause Action Message is generated if temperatu
32. ST END Select REPORT INTERVAL and press the Edit key Press the Incr or Decr keys to select an interval between the minimum of 02 seconds and the maximum of 99 seconds Press the Accpt key to lock the selection into the MAX 1000 parameters Press the Esc key to return to the REPORT SETUP MENU Move the select bar to REPORT ITEMS TO PRINT and press the Selct key Move up and or down through the list and select the items to be printed Press the Esc key until the OPENING MENU is displayed To verify that the MAX 1000 and the printer are connected and working together run a weight test The printer output is automatically enabled when either a weight test or a tartrate test is selected 19 4 11 DATA OUTPUT TO A COMPUTER If you wish to monitor the test with a computer connect a null modem cable to the smaller of the two D connectors at the rear of the instrument Use any serial port communications program not provided on your computer to read the messages emitted at the MAX 1000 serial port The content of each message can be selected from the REPORT ITEMS TO PRINT menu which is described on page 40 4 11 1 The MAX 1000 comes equipped with RS 232 communications available at a 9 pin standard serial communications socket at the rear of the instrument The standard communications parameters used are 9600 N 8 1 9600 baud no parity eight data bits one sto
33. TRATE 150 100 025 8 0 TEST 120 050 025 5 0 090 050 025 3 0 145 050 025 2 0 125 050 025 2 0 CUSTOM 160 025 025 8 0 SWN MODE RY RATE 1 0 PRED 1 00 1 0 RATE 0 03 1 0 PRED 00 1 0 PRED 00 1 0 PRED 00 1 0 RATE 1 10 1 0 PRED 00 Page 01 35 The column headings are abbreviations for the following ID TST IDL HST SSZ SWN MODE RY RATE 7 3 7 3 1 7 3 2 36 ID number of the Memory Start Set ID Name of the Memory Start Set Programmed Test Temperature Parameter Programmed Idle Test Temperature Parameter Programmed HISTART Temperature Parameter Sample Size Sample Window Selected End Test On Criteria Prediction Rate or Time Reliability Percentage Parameter for End Test on Manual Prediction Rate of Weight Loss Parameter for End Test on Rate STORED DATA This function is used to work with data stored in the instrument from past moisture determinations To access this function go to the MENU and select STORED DATA MENU VIEW STORED DATA This function is used to view a list of all stored test results The list is presented in abbreviated form consisting of the memory start number used the sample MAIN MENU MEMORY START MENU STORED DATA MENU CALIBRATION MENU SETUP MENU L Esc 5 1 Up Figure 35 STORED DATA name date and the final result Pressing Selct displays the targeted stability reliability tare and rate if they have been selected in the REPORT ITEMS TO
34. To cancel the change press the key labeled Cancl The display remains at the TEMPERA TURES screen Doun Figure 19 TEST TEMPERATURE gt Histart Temperature Test speed may be increased for some samples by using the MAX 1000 TEST TEMPERATURES HISTART TEMP option The principle TEST TEMPERATURE 160 C behind this feature is that some samples contain free surface and bound moisture This surface moisture can be quickly driven off at temperatures greater than the temperature normally used for that product START TEMP CONTROL OFF Figure 20 TEST HISTART TEMP The instrument begins a test at the HISTART TEMPERATURE and continues at that temperature until the rate of moisture loss falls to half of its peak value It then goes to the test temperature setpoint for the remainder of the test For this to work properly the HISTART TEMPERATURE is usually higher than the test temperature The MAX 1000 prediction algorithm is so fast this process is usually not necessary To deactivate the HISTART feature set the TEST HISTART TEMP to 25 C To change the HISTART TEMPERATURE press Edit The HISTART TEMPERATURE setpoint is displayed after TEST HISTART TEMP and the cursor will be positioned at the first most significant digit Use the up or down arrows to increase or decrease the digit value Press the right arrow key to move to another digit and change each appropriately When
35. Y 35 7 3 STOREDJIDATA ooi xe piace ote os 36 7 3 1 VIEW STORED DATA 36 1 32 gt PRINT STORED eas eh wee 36 7 4 CALIBRATION MENU 37 TAk CALIBRATE BALANCE ee ee ee eed 37 7 5 SETUP MENU aces es ee ces kom ce e eee 38 SPRINTER SETUP ausu Dre Tecta moet Tal Ge a 38 T2 AREPOR TASETUP te tien tos Loses vos s uris Eas Lais 39 REPORT CONTROL 5 40 REPORT ITEMS TO PRINT 52 204 40 ENTER EDIT COMPANY 41 CLOCK SETUP aat ttl abe du ads od Ao duet 42 7 5 4 DATA FORMAT SETUP DOES ESAE PEARLS M LS 42 1 ENDING CRITERIA DISPLAY 42 LOT NUMBER AND PRODUCTID 42 ES SYRINGE TEST Mice vb citi tie eres lle fe 43 40 9 ACCESS KEY SETUP eta alte he Otol leds ora e tee 43 8 PARAM KEY TEMPORARILY CHANGING TEST PARAMETERS 45 8 1 CHANGING THE TEMPERATURE SETPOINT 45 9 MISCELLANEOUS MENU MESSAGES 47 9 1 CONTROL PROGRAM VERSION NUMBER 47 9 2 DIAGNOSTIC FAILURE MESSAGES
36. a small convection air oven a weighing mechanism with a resolution of 1 milligram and a full scale range of 40 grams and a backlit graphic liquid crystal display A microprocessor controls the test process does all necessary calculations and oversees data handling and communications A small fan maintains the electronics at a stable low temperature Provisions for connection of a printer and serial communications devices are provided at the back The power input module can be set for either 100 120 volts or 220 240 volts Figure 7 page 13 HEATING SYSTEM The sample heating system is designed to remove volatile components from the sample as quickly as possible while maintaining accurate temperature control to prevent sample degradation Oven temperature is measured with a platinum resistance device RTD mounted in a rugged metal tube to prevent damage and dislocation Temperature control accuracy is within one degree of the set value after equilibrium is reached The 700 watt heater reaches equilibrium in 90 to 180 seconds depending on the difference between the starting temperature and the setpoint Closed loop feedback control assures a constant temperature even if power line voltage varies during the test Heat is automatically turned off when the test is completed Open the lid to speed cooling for the next test if needed PREDICTION FEATURE The MAX 1000 uses an advanced version of the AZI moisture prediction system to speed test r
37. accurate but takes the longest time RELAXED is the least accurate but is the fastest MIDRANGE gives excellent results in an average amount of time See the section on PERFORMANCE ENHANCEMENT on page 48 to learn how to determine appropriate settings for each application End Test on Rate This feature ends the test to when the rate ENDING CRITERIA A END TEST ON PREDICTION END TEST ON RATE Down Figure 24 END TEST ON PRED ENDING CRITERIA END TEST ON PREDICTION 4 END TEST RATE UTE Down Figure 25 END TEST ON RATE of the weight loss rate falls below a selected value This value is a percent per minute For example entering 0 10 means that the test will end when the rate of change of the actual weight loss is less than 0 10 per minute The instrument s program assumes that the sample contains volatile material that will completely evaporate after some time It further assumes that at first the rate will be large then gradually decrease to zero Selecting some threshold rate value will cause the test to end before the sample is completely dry Rate is useful to profile a sample s weight loss Some applications are faster in the rate ending criteria Others are faster in the prediction ending criteria END TEST ON RATE End Test When Moisture Change is less than 6 66 Min FE RENI Figure 26 RATE CRITERIA Some samples cont
38. ain more than one volatile material for example nylon resins with large amounts of unpolymerized material Caprolactam In these cases the rate will fall to some fixed value when all the moisture is evaporated but the monomer is still evaporating The graphical display available from the FINAL TEST screen is of great help in visualizing these cases The rate ending criteria if set above the rate of monomer volatilization may give the best results To change the rate ending criteria move the selector bar to END TEST ON RATE and press the key marked Selct The following screen END TEST ON RATE appears and the Selct key becomes the Edit key Press this key to change the value or the Esc key to leave without making any changes The cursor will appear on the first digit Move the selector to the digit to be changed and use the Incr or Decr keys to change it Press Quit when finished Press the Accpt key to record the new values or to revert to the previously stored value Press the Esc key to return to the ENDING CRITERIA menu Press Esc a second time to return to the EDIT TEST screen and press Esc a third and fourth time to return to the top of the MEMRY START menu SAMPLE SIZE OPTIONS EDIT TEST PARAMETERS SAMPLE NAME SAMPLE A This feature enters an optimum sample size and the acceptable minimum and maximum sample range Sample size ranges can be programmed from
39. and the stylized AZI are all registered trademarks of Arizona Instrument Corporation Copyright 1996 Arizona Instrument Corporation All rights reserved MAX 1000 is a trademark of Arizona Instrument Corporation Tygon is a registered trademark of the Norton Company ARIZONA INSTRUMENT CORPORATION COMPUTRAC DIVISION COMPUTRAC MAX 1000 MOISTURE ANALYZER USER S MANUAL If you have any questions regarding the operation of this instrument please call our toll free number 800 235 3360 Internationally call 602 470 1414 or FAX 480 804 0656 Arizona Instrument LLC 3375 N Delaware St Chandler AZ 85225 800 528 7411 602 470 1414 Fax 480 804 0656 http www azic com email azi azic com General intl azic com International support azic com Customer Support 76
40. approximately 8 grams of sample and is run at 150 C Results should be within a range of 0 100 of the assayed value on the label of the chemical typically 15 61 15 71 From the FINAL TEST screen press the Memry key If the highlight bar is not already on it use the up and down arrows to select 01 ID TARTRATE Press the START key When the OPEN LID appears on the screen open the lid and GENTLY place a new clean sample pan on the pan support Close the lid and allow the unit to tare When the OPEN LID appears on the screen again open the lid and gently and evenly shake sodium tartrate over the surface of the sample pan until the display shows that 7 9 to 8 1 grams of sample are loaded Close the lid and the test will begin Wait for the end of test signal If this is the first test of the day discard the results of this test for stability reasons 12 3 10 Results should be within a range of 0 100 of the assayed value on the bottle 12 4 124 1 12 4 2 12 4 3 12 4 4 label PRECISION TARTRATE TEST Run five sodium tartrate The mean of the sodium tartrate results should be 0 10 of the value on the bottle label If the result 1s still out of tolerance The most common causes of such errors are bent or dirty sample pans or debris falling into the balance shaft interfering with the pan support s ability to freely move up and down Also clean the heater assembly and check the temperature sensor
41. ature ENDING CRITERIA EDIT TEST PARAMETERS Ending criteri he rul h SAMPLE NAME FLOUR ding criteria are t e rules used by the SANELE instrument to automatically end a test ENDING CRITERIA SAMPLE SIZE OPTIONS This feature makes it unnecessary for the TARE OPTIONS RESULT DISPLAY OPTIONS operator to monitor the analyzer while it is performing a test 5 0 Change the ending criteria from the EDIT TEST PARAMETERS menu using the up Figure 23 ENDING CRITERIA or down arrow key to move the selector bar to the ENDING CRITERIA option and press the key labeled Selct This displays the ENDING CRITERIA menu END TEST ON PREDICTIONThe test will end when the predicted final value meets certain criteria END TEST ON RATE The test will end when the weight loss rate falls below a selected value Highlight the ending criterion to be changed and press Selct 29 30 gt End Test on Prediction To change the prediction ending criteria move the selector bar to END TEST ON PREDICTION and press the key marked Selct This will bring up the ending criteria screen labeled END TEST ON PREDICTION at the top Highlight the best one for the next test TIGHT MIDRANGE or RELAXED and press Selct The triangular selection indicator at the left edge of the screen will show the selection Press Esc to store the selection and return to the previous menu TIGHT is the most
42. ck the printer cable and paper Install the paper according to the instructions in the printer manual Plug the large end cable connector into its mating socket on the printer and the small end into its mating socket on the back of the MAX 1000 Plug the power cord into the printer and into a GROUNDED power receptacle Turn the printer power on and observe that it lights up Press the ON LINE button to bring the printer on line After the printer is attached configure the MAX 1000 to the proper printer type IBM or Epson compatible See printer manual for compatibility NOTE If the printer is supplied with the MAX 1000 from AZI the unit is already programmed If the printer is obtained from another source refer to its manual for programming information To set up the MAX 1000 begin at the OPENING MENU and Press the Menu key Press the Down key NTER SETUP until the select bar is on SETUP MENU CLOCK SETUP and press the Selct key ACCESS KEY SETUP The select bar should be on PRINTER Esce 5 DOTT SETUP so just press the Selct key The select bar should be on PRINTER Figure 10 SETUP MENU TYPE Press the Edit key to allow the selection to be changed Press the Incr key or Decr key to change the selection between IBM and Epson When the correct type is displayed press the Accept key to lock the selection into the MAX 1000 parameters Move the select bar to OUTPUT PORT and
43. d or alternately spray a damp cloth or paper towel with cleaner and clean the heater box Use a small brush or cotton swab to remove excess buildup Dry the front of the heater with paper towels or damp cloth until clean Do NOT spray cleaner heavily into the heater and or shroud area Excessive moisture could affect wiring and its insulation 5 Allow heater box to dry for at least fifteen minutes to ensure that is completely dry 6 Re assemble heater and correctly position the RTD using the RTD alignment gauge and the marks made with the permanent marker If an RTD alignment gauge AZI p n 360 0164 was not included with the delivery of your unit please contact your Sales Representative or Customer Service Representative to obtain one before attempting to clean your instrument 7 Remove the masking tape from the hole in the chamber floor and carefully install the pan support and pan Run a weight test to verify that the unit is functioning correctly see page 55 Cleaning frequency will vary depending on the application and frequency of use We recommend that you establish a periodic cleaning schedule to ensure unit to unit correlation and performance The instrument should be returned to AZI on an annual basis for a temperature calibration which is NIST traceable Call AZI Customer Service if you have any questions 13 3 SAMPLE PAN SUPPORT The sample pan support should be cleaned periodically if a high volatile material is being te
44. down arrows to increase or decrease the digit value Press the right arrow key to move to another digit and change each appropriately When finished move the cursor to the end digit and press the key labeled Quit To register the change press the key labeled Accpt To cancel the change press the key labeled Cancl The display remains at the TEMPERATURES screen If you accepted the change note that the new set point is displayed at the upper and lower end of the thermometer display on the FINAL TEST screen This is the idle temperature that will be used after START is pressed the next time Start Temp Control The START TEMP CONTROL prevents a test from starting if the chamber SEEEN temperature is more than two degrees TE AU 25 2 hotter or colder than the IDLE TME eer quent TEMPERATURE This feature can improvethe standard deviation of results of some temperature sensitive materials When this feature is enabled on an alarm will sound when the chamber temperature is correct Figure 22 START TEMP CONTROL EEENLECCENE ECTETUR UT If START is pressed when the chamber is too hot the following message will be displayed CHAMBER TEMPERATURE IS HIGH Open the lid and wait for the alarm If it s too cold this message appears CHAMBER TEMPERATURE IS LOW Leave the lid closed and wait for alarm When the TEMP CONTROL is disabled off a test can be started at any temper
45. e Requirement Fuse Holder A Power Receptacle B Power Switch C Fan D Printer Interface E RS 232 9 Pin Computer Interface F Nitrogen Purge Fittings G 4 2 1 4 2 2 4 2 3 The MAX 1000 can be used with either 120 or 240 VAC Check the setting on the fuse holder A on Figure 7 for correct voltage 100 120 or 220 240 volts from your power receptacle To change from 110 to 220VAC or from 220 to 110VAC Remove the tab in the fuse holder and reverse the small card inside Change the fuse a 100 120 unit should have an eight 8 amp slow blow fuse AZI P N 190 1001 and a 200 240 unit should have a 4 amp slow blow fuse AZI P N 190 1002 Slide the card in the center of the fuse holder out turn it around and slide it back in so that the correct voltage shows through the window A on Figure 7 Remove the power cord from the packing material and insert the rectangular end into the power receptacle B on Figure 7 at the rear of the instrument Be sure that the power switch C on Figure 7 located above the power receptacle is in the off O position 13 4 2 4 4 2 5 4 3 4 3 1 4 5 2 4 4 4 4 1 4 4 2 14 The power source outlet used by the MAX 1000 MUST BE GROUNDED If you are not sure if the socket is grounded check with your plant electrician before proceeding The MAX 1000 will appear to function correctly even if the socket is not grounded but there is a danger of possible electr
46. e placed on an aluminum sample pan in the test chamber Range can be 150 milligrams to 40 grams The aluminum pan sits on a pan support coupled to a sensitive digital electronic force balance The force balance registers the initial weight of the sample before testing and relays the sample s decreasing weight to the microprocessor for evaluation Balance readings are averaged to eliminate signal interference or erroneous data 10 1 6 Test temperatures can be programmed between ambient 25 C and 225 C in either a one or two step temperature contour Heating is done through a 700 watt nichrome element which is located on the underside of the test chamber s lid An RTD monitors the temperature of the test chamber and sends that information back to the microprocessor Under the microprocessor s control the heater element is cycled on and off to bring the test chamber to the programmed level The temperature is maintained within 1 C of the programmed temperature throughout the test 10 1 7 A unique HISTART mode see HISTART TEMPERATURE on the MAX 1000 takes advantage of the evaporative cooling effect at higher temperatures to reduce test times and improve repeatability When the HISTART mode is used each cycle begins with a higher temperature setting to rapidly evaporate moisture from the sample The cooling effect of surface evaporation prevents burning of the sample although the chamber temperature may be quite high During this high temperature
47. eed xs 1 2 GEETING STARTED Os s atte tod dte rta mic Ne EE 2 2 1 INSTRUMENT SETUP x beue eee SCIEN a ee es 2 2 2 INSTRUMENT 4 2 3 TEST PROCEDURE 6er ltrs CIN trames ee tine 4 3 SYSTEM DESCRIPTION 523 52m hae TG ee OUP i gd d 6 3 1 HARDWARE ge Sei edle M e X Ada AD Aen 6 3 2 HEATING SYSTEM uis 3 9 her uet Vette ioo ack nana y Gide antes pied 6 3 3 PREDICTION FEATURE 6 3 4 CONTROLS e css esatta Patras bebo beh re Cre 7 3 5 TAT ACUTE beat pn wre nla boda dm nh a OR nate eee ORS 8 3 6 eA Oe ES te exe tx dc ete e tete er 8 4 INSTRUMENT SETUP 322a eda AERE eke eee 10 4 1 INSTALLATION OF BALANCE PAN SUPPORT 11 4 2 POWER CONNECTION 13 4 3 PRINTER AND OR COMPUTER SETUP 14 4 4 POWER ON at ary doth eet set esed o ur ttbi 14 4 5 NITROGEN PURGE 15 4 6 1000 N PURGE CONVERSION 15 4 7 NITROGEN PURGE 5 16 4 8 OUTPUT TOJPRINTER 53 22339 3 aue AR COE DUREE A en 17 4 9 ATTACHING AND CONFIGURING THE PRINTER
48. emaining at the end of the test Note that the dry weight value ratio can exceed unity one and often does in certain applications such as soil and paper To program in the desired results Selct the RESULT DISPLAY OPTIONS and EDIT TEST PARAMETERS SAMPLE NAME SAMPLE A TEMPERATURES ENDING CRITERIA SAMPLE SIZE OPTIONS TARE OPTIONS RESULT DISPLAY OPTIONS Esc Selct Up Down Figure 34 RESULT DISPLAY OPTIONS toggle through the options until the correct one is displayed Use the Quit and Esc keys to save and leave the menu REORDER MEMORY START This copies a stored parameter set to another position in the list If you copy a set over an existing set the old set is written over and cannot be recovered Be careful To quickly create a new set similar to an old one use REORDER to copy the old one to a blank location then use ADD EDIT to enter the new name and changed values DELETE MEMORY START This command removes a stored set of parameters Remember to use this carefully as the information can not be retrieved The weight and tartrate tests are not affected by this option PRINT MEMORY START This command prints the stored parameters All 7 00 to 07 of the numbered Memory Start Sets are printed giving the values of the parameters shown below in the print out example COMPUTRAC MAX1000 MEMORY START REPORT 00 01 02 03 04 05 06 ID TST IDL HST SSZ WEIGHT 105 025 025 8 0 TAR
49. ent with your particular sample to determine which criteria is best for your product See the earlier section on ENDING CRITERIA page 29 or Appendix A or B for more details 51 11 11 1 11 1 1 11 1 2 11 1 3 11 2 11 2 1 52 SAMPLE PREPARATION TESTING AND ANALYSIS SAMPLE PREPARATION The MAX system can be used to test a wide range of products from finely ground low moisture powders to high moisture slurries For best results the sample should be of a uniform particle size and homogeneous in nature Large chunk samples such as charcoal or cookies should be crushed or ground to smaller pieces approximately 1 4 or less in diameter Some samples such as dried vegetables may also need to be ground The smaller pieces will easily release moisture during testing leading to shorter test times and more repeatable results Any sample tested for moisture should be as uniform as possible If sample material is collected into a jar or sampling bag shake the jar or bag to produce a uniform mixture Liquid samples should also be mixed or shaken to ensure a more homogeneous mixture Solid granular sample material should be shaken onto the pan from a spoon shaking sample directly from the collection jar will usually deposit only the larger granules not a representative mixture Liquid samples or slurries can be spooned or poured onto the sample pan however a pipette or sampling straw will collect a more homogeneous mixture
50. enu system because each screen offers a series of choices selected by specific keystrokes Page 22 shows a diagram of the menu structure of the MAX 1000 which is arranged in a sequentially accessed tree of screens The FINAL TEST screen will appear when the system is first started This OFF screen displays the current date time last e test parameter set name last test result TIME 66 66 last elapsed test time and the temperature TEST S PRES S START setpoint The current parameter set name NEU PARAMETRS PRESS PARAM io and prompts relating to the function keys are in the center of the screen Date Parsi When test is completed the values at the end of the test are displayed They will be displayed until START is pressed to begin another test A highlighted bar at the bottom of the screen shows the balance reading At the right is a symbolic thermometer with the current heat chamber temperature displayed both graphically and numerically Figure 12 FINAL TEST SCREEN The bottom row shows prompts suggesting the function of the five keys arrayed across the bottom edge of the display The left arrow key goes to the stored sets of test parameters Memory starts The right arrow Menu gets to the main menu of the menu system The up arrow key Data provides select data on the most recent test If the test is complete the full test is shown If the
51. er than 20 or less than 0 5 use RATE If greater than 20 adjust rate in increments of 0 25 minute IE 0 50 minute 0 75 minute 1 00 minute 1 25 minute If less than 0 5 adjust rate in increments of 0 05 beginning at 0 25 and adjust down as needed If expected moisture is between 0 5 and 20 use PREDICT MAX 1000 Relaxed predict If smaller standard deviations are needed MAX 1000 Mid range predict If improved standard deviations are needed MAX 1000 Tight predict If standard deviations are still not acceptable try RATE ending criteria SAMPLE SIZE Adjust as necessary for application Smaller sample sizes of a homogenous material will decrease test times TARE OPTIONS Pan tare Standard Sample tare When stable Use sample tare 3 seconds with warm or hot applications Ultra low pan tare With samples having moisture levels below 1 PARAMETER DOCUMENTATION To ensure optimum and efficient correlation reproducibility and for record keeping purposes record the following Standard testing 3 Karl Fischer 3 oven tests or other accepted reference method procedure 5 repeat tests on the MAX 1000 Record comments on special techniques required to duplicate accurate and reproducible results If you need assistance with parameter development or have questions concerning the operation of the analyzer please contact either your Sales Representative or Customer Service Representative at 800
52. esults and to automatically end each test The prediction system relies on the fact that most samples exhibit a weight loss trend such that the rate of volatilization is proportional to the amount of volatile material remaining in the sample The resulting weight trend approximates an exponential function and the prediction algorithm models this exponential function continuously updating the prediction each second When the prediction is sufficiently stable and reliable the test ends and the predicted endpoint is displayed and printed if an accessory printer is attached Proper selection of the ending criteria can greatly improve the test times and repeatability See the section on ENDING CRITERIA page 29 for more information about this subject 3 4 3 4 1 CONTROLS The front panel controls consist of two arrow keys at the left used to adjust the display CONTRAST five small keys below the display labeled Help lt gt 4 v and a large START key at the right side of the panel OFF FINAL 88 88 MOISTURE TIME 66 T SST PRESS START MEMRY SELEGTS PRESS MEMRY NEW PARAMETRS PRESS PARAM CEZA 025 Menu Data Param COMPUTRAC Figure 3 MAX 1000 FINAL TEST SCREEN 3 4 2 3 4 3 3 4 4 The START key is pressed to inform the instrument that a moisture determination is to begin If all system parameters have already been selected no other key s
53. evaporation the balance records that weight loss and transmits the data to the microprocessor The microprocessor interprets the information and compares the sample s weight loss to a standard drying curve The final moisture concentration is extrapolated from the curve and results are available within minutes A typical drying curve see Figure 53 below consists of three portions The first portion A B represents the sample s weight loss as it heats from room to testing temperature Section B C is linear representing moisture loss from the interior of each particle of the tested sample The final portion of the curve C D is exponential in nature and represents the final evolution of moisture from within the particle The point at which no additional weight loss occurs represents the complete evolution of water from the original sample E z o o c 2 v o Q z e 2 I 9 Figure 53 DRYING CURVE 10 1 4 The final portion of the curve D E is the longest and most time consuming portion of the entire testing process The time for a sample to reach zero residual moisture can take from one to 24 hours depending upon the sample sample preparation and testing temperature The MAX 1000 loss on drying system calculates the sample s moisture concentration through mathematical extrapolation from the exponential C D portion of the curve 10 1 5 Normally 1 gram to 10 grams of sample ar
54. eys to create or edit a master key code of up to eight characters 43 44 In addition to a master key the system allows for three parameter keys to be entered Each parameter key will allow selected users to access or edit information in select memory starts These codes are entered and edited in the same way as the master code Assign parameter key codes to their respective memory starts by highlighting ASSIGN KEY CODES and using the arrow keys to enter a key code 8 PARAM KEY TEMPORARILY CHANGING TEST PARAMETERS To develop a new application a few tests are run with different values for parameters such as temperature and sample size Ending criteria and sample size are also changed to improve speed and accuracy To speed this process the Param function allows immediate alteration of a test parameter and immediate execution of a test from the parameter change screen This parameter change function is only available for the parameter set stored in Memory Start 06 entitled CUSTOM To quickly change a parameter press Param at the FINAL TEST screen If T the access code control system is SAMPLE NAME TEMPERATURES enabled pressing the Param key will ENDING CRITERIA bring up a message asking for the access SUN be BTE CRITANE code Successfully entering the correct REPORT CONTROL OPTIONS Test Press START code will then bring up the PARAMET ERS MENU START screen Press the ee large START
55. feature to speed a test and still obtain accurate results Experiment with various high start temperatures until one is found that gives the fastest test times without sample degradation Start 10 degrees above the normal test temperature and work upward in equal increments to find the best combination If sample degradation occurs usually indicated by a change in color or transparency use a lower temperature It is not normally a good idea to use a high start temperature more than 30 C above the normal temperature As the HISTART temperature is increased the test should decrease while final moisture or solids results are within range Beyond a certain temperature which is different for different materials results will go out of range as the sample burns 12 12 1 12 1 1 12 1 2 12 1 3 12 14 12 1 5 12 1 6 12 1 7 12 1 6 PERFORMANCE VERIFICATION Periodic checks of the system are recommended to verify proper system operation These periodic checks will satisfy some quality assurance guidelines when performed daily A log is recommended either hand written or computer managed which will record the weight tests sodium tartrate tests and retained sample s results Shifts in results that are out of range can be quickly detected and the appropriate corrections made Any time the unit is moved the power is switched off or the balance is jarred or bumped the 20 gram balance calibration should be performed see page 37
56. finished move the cursor left or right to the end digit and press the key labeled Quit 27 28 To register the change press the key labeled Accpt To cancel the change press the key labeled Cancl The display remains at the TEST TEMPERATURE screen If you accepted the change note that the new set point is displayed at the top of the thermometer display on the FINAL TEST screen This is the HISTART TEMPERATURE that will be used when START is pressed the next time Idle Temperature The idle temperature is the temperature maintained by the instrument between TEMPERATURES E gt tests This is used to speed testing by TEST TEMPERATURE 168 C TEST HISTART TEMP 25 C decreasing the time required to heat the IDLE TEMPERATURE 025 C sample chamber at the beginning of the START TEMP CONTROL OFF test It can save 10 to 90 seconds of test time if properly used A common idle temperature value is 50 C but any value above room temperature but below 150 C can be used Experiment to see Figure 21 IDLE TEMPERATURE what value is best for your application Too high a value will cause low results because the sample is evaporating while the basis weight is being measured at the beginning of the test Esc Edit Up The current idle temperature setpoint is displayed after IDLE TEMPERATURE and the cursor will be positioned at the first most significant digit Use the up or
57. hange this option press Edit or Toggle or to change a different option move the selector bar to it and press Edit The available REPORT CONTROL OPTIONS are Figure 45 REPORT CONTROL REPORT ENABLED YES or NO REPORT START START TEST Ist PRED first prediction or TEST END If TEST END is selected real time data will not be printed during the test REPORT INTERVAL Minimum of 02 seconds to the maximum of 99 seconds To store the new values Press Esc REPORT ITEMS TO PRINT REPORT SETUP The MAX 1000 can store the most REPORT CONTROL OPTIONS REPORT ITEMS TO PRINT recent test result in memory These test ENTERA EDIT COMPANY NAME result is available for printing To change the stored items select REPORT ITEMS TO PRINT and press the Selct key NEN ECT 5 1 The options available on the REPORT Fi 46 ITEMS TO PRINT screen are igure 46 TTEMS TO PRINT MEMORY SELCT Number of the memory start parameter set in effect for this test SAMPLE NAME Identification tag for the parameter set used LOT NUMBER Identification tag for the lot of material to be tested now PRODUCT ID Identification tag for the product in this lot of tested material Lot number and product ID are alphanumeric tags entered by the operator to identify a test or set of tests for reporting purposes DATE Date of the test TIME OF DAY Time of the test FINAL RESULT Test result value RESU
58. he sample should be distributed over the surface by gentle shaking tapping or for very viscous samples spread with a spoon or knife Do not spread granular products with a spoon as the particles compress even under gentle pressure affecting test times and results An even layer of sample across the pan will reduce test times and increase precision of results LIQUID SAMPLES Some liquid samples will dry slowly even at high temperatures Drops or puddles may form on the pan that dry slowly as the sample concentrates A skin may form which limits evaporation from the interior Long test times greater than 25 minutes and low moisture or high solids values suggest incomplete drying Pre dried glass fiber filter paper and flat bottomed pans are recommended to successfully test samples such as these Filter paper serves as a support for the liquid sample The sample is absorbed through the paper where a more even rapid evaporation occurs reducing test times Occasionally some samples cannot be absorbed into the filter paper At the end of the test examination of the sample pan shows the sample sitting high above the filter paper with a thick crust The crust may be singed from the heat or even show bubbling where vapor has collected beneath the surface SOLIDS results will be high or MOISTURE results will be low Samples such as these are treated differently After the sample has been added to the sample pan remove the pan from the
59. ically require smaller sample sizes one to four grams Low moisture materials such as low moisture resins typically require sample sizes from 20 to 30 grams Contact your sales representative or AZI Customer Service for appropriate sample sizes TARE OPTIONS This screen selects the parameters that define how stable the balance must be EDIT TEST PARAMETERS before a test will start There are two SAMPLE NAME SAMPLE A TEMPERATURES menus available under this option to allow ENDING CRITERIA better control of tare measurements under BAMELE BIZE OBELONS different conditions PAN TARE RESULT DISPLAY OPTIONS OPTIONS allow checks that ensure the ENNENICCEN Sd Doun drift in the measured weight of the empty pan is less than a given number SAMPLE TARE OPTIONS allow testing to begin after a given tare time has elapsed Figure 29 TARE OPTIONS Pan Tare Options Pan tare refers to the first step in a moisture test the taring of an empty sample pan Depending on a number of TARE OPTIONS different criteria such as previous test PAN TARE OPTIONS setpoint temperature the amount of cool SIDE FERES down time between tests and the current idle temperature temperature fluctuation across the balance can occur The temperature fluctuation causes the balance to drift during and after the sample pan tare The drift is reflected as error in the final moisture number Since the conditions which cause the temperature fluc
60. ing parameter development to aid in selecting the best ending criteria to use for a particular test material These values serve little purpose however during normal operation and may even cause confusion LOT NUMBER AND PRODUCT ID If the LOT NUMBER function is toggled ON in the DATA FORMAT SETUP menu then starting a material test will bring up a screen labeled EDIT LOT AND NUMBER The alphanumeric label contains up to 10 positions and can be changed with the arrow keys Pressing Incr starts at A and continues through the alphabet the numbers then the symbols Decr starts at the bottom displaying the symbols first etc Select the item to be edited with the up and down arrow keys and press Edit Press Quit when editing is complete Press Accpt to record the change or Cancl to leave it unchanged This function will enable the instrument to retain and report the additional information entered 42 7 5 5 SYRINGE TEST This function is useful when testing materials with high solvent or volatile DATA FORMAT SETUP content The purpose is to account for DII the weight loss of material that normally wogild LOT NUMBER evaporate during the sample loading process By weighing the material in the syringe before and after loading a more accurate start weight can be entered An external balance with 0 1 mg resolution is required for this function ee Figure 50 SYRINGE TEST To
61. ing your first analysis The sections starting at SYSTEM DESCRIPTION page 6 provide the detail on the instrument operating principles and sampling 2 1 INSTRUMENT SETUP Setting up your instrument for operation requires just a few steps For more detailed information on hardware assembly see the section on SYSTEM DESCRIPTION on page 6 Listed here are the main steps Carefully unpack the instrument and locate the following items MAX 1000 AZI p n MAX 1000 Smaller box containing a pan support AZI p n 355 0016 balance adaptor and balance cover MAX 1000 Accessory kit AZI p n Y990 0061 Line cord AZI p n 200 0002 Package of sample pans AZI p n 990 0008 or 990 0010 Test weights 3 grams AZI p n 690 0003 5 grams AZI p n 690 0004 20 grams AZI p n 690 0007 Tweezers AZI p n 690 0012 Hex wrench AZI p n 690 0011 This MAX 1000 user s manual AZI p n SS 187 Optional accessories Printer AZI p n 990 0044 Printer cable 6 AZI p n 600 0105 RS 232 cable null modem for computer interface AZI p n 6000 1044 Filter paper AZI p n 990 0003 Please save the shipping box AZI p n 751 0008 for future use Location Selection Select a location for the instrument that is Firm and level Free from vibration that will affect the balance measurements Close to an isolated power outlet that will provide dedicated electrical power and Away from the direct flow of a fan or heating air conditioning outlet that might
62. las LvWHod viva dNLas 420712 dnias 90195 Vivd 1 LNIHd VIVO 1 MIIA SLYVLS AHOMNWSIN SLYVLS SLYVLS SLYVLS AHOW3MW 3143730 M3OHO3H llaaraav V LVO 34015 1915 ONAW dnas al Londodd s L107 NIVIA x LUVLS 3 nan SLYVLS N33HOS S9NIN3dO Figure 13 MAX 1000 MENU TREE 22 6 6 1 6 2 6 3 6 4 MEMRY KEY MEMORY START SELECTIONS The Memry menu branch lists the stored parameter sets used for various applications This menu is accessed by pressing the button under the word Memry on the display Memory Starts are numbered at the left beginning with 00 A total of 7 different TO BEGIN PRESS START i i gt Ee parameter sets can be retained in the SETS system memory Each has a unique number and a user entered ID label Memory starts 00 Weight Test and 01 CUSTOM Sodium Tartrate are preprogrammed for system verification These are stored in non volatile memory and can not be changed Memory start 06 is the Figure 14 MEMORY STARTS CUSTOM parameter set The instrument uses this set when first powered up if no other memory start parameter set has been programmed and selected This location is also used to store temporary parameter sets entered via the Param
63. like a light bulb and it shows that power is being applied to the heater The next icon position a check mark indicates a test is done The last icon on the right is a tilted balance and it shows that the weighing mechanism is being adjusted in preparation for a moisture determination If the balance icon is displayed then the balance is momentarily unstable or off line The MAX 1000 can output data to a printer or to a computer for storage For printer output connect a standard PC parallel printer to the MAX 1000 printer port For communications with a computer connect a null modem cable between the MAX 1000 RS 232 port and a computer running communications software Call Arizona Instrument Customer Service for more information on this software WEIGHT DISPLAY The internal balance weight reading is always visible on the screen when in the Whil ht i 7 0 8 8 9 0 ile loading the sample the weight is CLOSE THE LID TO START TEST displayed in grams at the bottom of the COELAN screen and on a horizontal bar at the top 1 The nominal weight is entered under E SAMPLE SIZE OPTIONS Add the sample so that the solid bar 1s at or near Figure 4 WEIGHT DISPLAY the optimal weight While a test is in progress the horizontal bar is not displayed Only the weight in grams is displayed at the bottom center of the screen shown as 08 000 grams in Figure 4 3 6 4 After START has been pressed a weight error message may ap
64. ll the 012 orifice fitting it has the black insert into the opening created when the plug was removed 15 4 7 4 7 1 4 7 2 4 1 3 16 LLL ces Ss Purge Plugs Purge Plug between Remove and replace heater coils them with nitrogen Replace with muffler inlets 1 800 236 3360 602 470 1414 E IN USA 50 60 Hz MODEL SER NO JSS DATE MFG AC VOLIS PSI NOTE Some models may look slightly different from the illustration but the purge fittings are in the same locations on all models gt Figure 8 NITROGEN PURGE FITTING LOCATIONS NITROGEN PURGE CONNECTIONS The following materials will be required for the nitrogen purge setup Nitrogen source cylinder or other supplied inert gas source Two stage regulator capable of regulating pressure to 5 psi gt For cylinder applications Multistage Gas Regulator for Compressed Air Cylinder VWR 55850 150 55850 155 or equivalent or Matheson Gas Products Brass Dual Stage Regulator model 8L or equivalent For supplied gas sources Matheson Gas Products Model 3470 Series Single Stage Line Regulator model 3471 Tubing with a 1 8 31 cm inside diameter And 1 4 625 cm outside diameter O D gt Vinyl tubing 63013 029 or gt Nalgene clear plastic tubing
65. nally UNPACKING For all shipments boxes and packing materials are available from AZI Call AZI Customer Service at 800 235 3360 or 602 470 1414 for additional shipping information when returning a unit for repair Retain all packaging materials for any future shipment of the instrument If the instrument is returned to Arizona Instrument for any reason it must be placed in the original packaging materials which have been tested and proven to be effective protection during shipment REPACKING FOR SHIPMENT Remove the pan support balance adapter and circular balance cover from the test chamber Wrap and package them in their own box Pack the MAX 1000 and the small box containing the heat shroud pan support in a Computrac MAX 1000 shipping container using the packing figure supplied on the box as a guide If proper shipping materials are not available contact AZI Customer Service at 800 235 3360 or 602 470 1414 to have a set AZI Part Number 751 0008 sent to you AZI WILL NOT BE RESPONSIBLE FOR SHIPPING DAMAGE IF YOU RETURN THE INSTRUMENT VIA ANY OTHER SHIPPER THAN FEDERAL EXPRESS YOU SHOULD INSURE IT FOR FULL VALUE vi viii TABLE of CONTENTS PACKING and SHIPPING INSTRUCTIONS V UNPACKING A os Sisk edem oR Gn BY Orn GEORG SAI STRIS NUES V REPACKING FOR SHIPMENT RS RR ER EE REB EUER NER ESES vi INTRODUCTION Qus tarte Sai te dtes er
66. ocution If grounded outlets are not available consider using a ground fault interrupter to protect personnel against electrical shock Also noise on the power lines may affect accuracy A dedicated AC power line or an isolation transformer for the MAX 1000 may be beneficial in eliminating this noise PRINTER AND OR COMPUTER SETUP If you have a printer connect it to the larger of the two D connectors E on Figure 7 at the rear of the instrument Use any standard Centronics parallel PC printer and printer cable Test information will print at the end of each test or at preset intervals For more details see PRINTER SETUP on page 38 and REPORT CONTROL OPTIONS page 40 If you would like data output to a computer attach a null modem cable to the 9 pin RS 232 connector F on Figure 7 See the section on DATA OUTPUT TO A COMPUTER page 20 for more information POWER ON Make sure instrument is OFF Plug the power cord into a power outlet Press the MAX 1000 power switch C on Figure 7 at the end marked I Observe that the fan D on Figure 7 next to the power receptacle begins to rotate If it does not check to be sure that power is present at the outlet being used Observe that the front panel screen is illuminated and the AZI logo appears momentarily Adjust the screen contrast with the large up down arrows at the left of the front panel labeled CONTRAST If no text is visible on the screen press and hold the up ar
67. ol appears RESULT DISPLAY OPTIONS Then press Right or Left to the next character to be changed Eight character positions are available Available characters are all the uppercase English letters the digits 0 to 9 and 12 common punctuation marks and symbols Move the cursor to the left or right to the last position and press Accpt to save the name Cancl returns to the menu without any name change Figure 17 SAMPLE NAME TEMPERATURES EDIT TEST PARAMETERS SAMPLE NAME NAME To change the temperature setpoint use LE LU RESTE SAMPLE SIZE OPTIONS oU LT TEMPERATURES HC MM selector bar to the U RESULT the selector bar to the particular temperature to be changed either the TEST TEMPERATURE the TEST HISTART TEMP or the IDLE TEMPERATURE and press the Edit key option and press the Selct key Move Figure 18 TEMPERATURES 26 Test Temperature The current setpoint is displayed after TEMPERATURES TEST TEMPERATURE Press the Edit key The cursor will be positioned at the TEST HISTART TEMP 25 C IDLE TEMPERATURE 825 C first most significant digit Use the up or START TEMP CONTROL OFF down arrows to increase or decrease the digit value Press the right arrow key to move to another digit and change each appropriately When finished move the cursor to the end digit and press the key labeled Quit To register the change press the key labeled Accpt
68. olled to a precision of plus or minus one degree The advanced heat control program brings the sample up to temperature in less than three minutes Depending on the rate of volatilization of the sample moisture test results are available in as little as two minutes twice as fast as older instruments of this type The instrument is programmable through the simple to understand front panel menu system For plant control purposes the programming features can be placed under access code control preventing unwanted changes to operating parameters Advanced computer circuitry enables the instrument to store test parameters for 5 different materials Test data can be printed and may also include graphical representations of the drying process Test data is stored and can be sent directly to a personal computer The MAX 1000 printer output is compatible with the Centronics parallel printer interface widely used as the standard personal computer printer format 2 GETTING STARTED This section is for those who can t bear to take the time to read instruction manuals before trying things out Call Arizona Instrument AZI Customer Service or your Sales Representative at 800 235 3360 or 602 470 1414 if you have any questions about the items below For those familiar with moisture analysis instruments the MAX 1000 should be simple to operate If you are unfamiliar with this technology please read all of the sections of this manual before attempt
69. p bit Refer to your computer communications program manual for instructions on configuring the PC to read this data format The MAX 1000 is configured as an RS 232 DTE data terminal equipment device The following table lists the pins used Pin Function Explanation of function 1 N C 2 RX Data in to MAX 1000 3 TX Data out from MAX 1000 4 DTR MAX 1000 is ready to send not used in this release 5 GND Ground reference for signals 6 DSR Used to indicate connected device is ready 7 RTS Request to Send not used in this release 8 CTS Clear to Send not used in this release 9 N C 4 11 2 Currently the MAX 1000 does not test to see if the connected device is actually ready or even present nor does it respond to a request by the connected device for status information 4 11 3 Since the MAX 1000 can send data to both the RS 232 port and the parallel printer port at the same time the same procedure to direct the output to printer routes the output to the computer 4 11 4 The same data is output to both the printer and the RS 232 ports logging programs If you have any questions about the instrument setup please call AZI Customer Service at 800 235 3360 or 602 470 1414 for assistance 20 5 1 5 2 5 3 54 MENU SYSTEM INSTRUMENT CONFIGURATION AND OPERATION The MAX 1000 is controlled by various parameters entered via the displayed commands and keyboard operations This entire set of commands and displays is called the m
70. pear on this screen For example if no pan or pan support is on the balance UNDERLOAD will be displayed If the weight on the sample pan exceeds 40 grams OVERLOAD will be displayed If an empty sample pan is in place and either of these displays appear turn the unit off remove the sample pan pan support the circular balance shield and clean any debris found beneath the pan support Reassemble the parts and be sure that no mechanical interference is present It may be necessary to calibrate the balance see page 37 If these measures fail to restore normal function call AZI Customer Service at 800 235 3360 or 602 470 1414 for assistance 4 10 INSTRUMENT SETUP Unpack the instrument as previously described on page v SAVE THE BOXES AND ALL PACKING MATERIALS IF THE UNIT IS SHIPPED FOR ANY REASON THE INSTRUMENT MUST BE SHIPPED IN ITS PROTECTIVE PACKAGING MATERIALS Check the packing list with the MAX 1000 to ensure that all items have been received Remove the instrument from its protective wrapping and place it on a firm level work surface Be sure there is enough clearance at the back for the power cord and above the unit for the cover If the instrument is cold for example if received in cold weather it may need to warm up to room temperature to allow the display and other electronics to work properly 4 1 INSTALLATION OF BALANCE PAN SUPPORT Q OPTIC SWITCH SHROUD GASKET BALANCE COVER REMOVAL
71. ple If results are out of range repeat the test to verify results 13 13 1 ROUTINE MAINTENANCE The MAX 1000 requires routine cleaning to keep the test chamber free of excess sample material Failure to keep the instrument interior clean reduces its accuracy and repeatability Sample material collecting in the test chamber prevents free movement of the pan support Also sample material collecting on the heater shroud prevents the lid from closing completely causing erratic moisture results Material also falls into the system s interior causing balance problems Routine cleaning of the test chamber reduces the possibility of problems and repairs extending the life of the instrument CHAMBER INTERIOR The chamber interior needs to be cleaned daily To clean the chamber interior switch the main power switch off A vacuum line portable vacuum cleaner or a small paint brush can be used to remove debris from the chamber 13 2 HEATER CLEANING Testing of some materials may cause a brown discoloration behind the heater and on the inside of the heater shroud This darkening affects results as heat is absorbed rather than reflected from the heater onto the sample It may be necessary to periodically clean this heater Items needed Cleaning solution such as 409 in a spray bottle Cloth and or paper towels Small stiff bristle brush such as toothbrush or acid brush Cotton swab Water for cleaning and wiping shroud
72. ratures in this range Several tests are performed using the same sample size and test parameters Results from these repeated tests are tabulated to calculate the mean or average and the standard deviation S D Analysis of the mean and standard deviation and their comparison with reference method results determines that the proper test temperature has been used If mean values do not compare well or if the standard deviation is too large test at another temperature along the plateau 10 3 10 3 1 10 3 2 10 3 3 3 00 3 00 3 00 7 002 5 005 5 00 4 00 4 3 00 4 2 00 1 00 4 0 00 T 100 140 Tamperature C Figure 54 MOISTURE VS TEMPERATURE CURVE SELECTION OF ENDING CRITERIA The MAX 1000 uses a sample dependent test to end a test when END TEST ON PREDICTION is selected The prediction uses a test called the reliability criterion which is equal to one minus the ratio between the actual weight loss at a given moment and the end point predicted by the microprocessor This parameter can be set to TIGHT MIDRANGE or RELAXED depending on the user s desire to balance speed and accuracy The END TEST ON RATE criteria will cause the test to end when the sample weight loss rate has fallen below a threshold value This is useful for samples that do not conform to the standard exponential drying model The decision of which ending criteria to use is application dependant Experim
73. rd the following Standard testing 3 Karl Fischer 3 oven tests or other accepted reference method procedure 5 repeat tests on the MAX 1000 Record comments on special techniques required to duplicate accurate and reproducible results If you need assistance with parameter development or have questions concerning the operation of the analyzer please contact either your Sales Representative or Customer Service Representative at 800 235 3600 or 602 470 1414 71 19 APPENDIX B 19 1 PARAMETER DEVELOPMENT FOODS INDUSTRY 72 Following are the guidelines for developing parameters TEST TEMPERATURES Be sure to use a temperature that is high enough to drive off all the moisture but does not degrade the material in any appreciable way If after establishing a test temperature a shorter test time is desirable try using HISTART temperature control Begin with a HISTART temperature that is 20 C higher than the test temperature STANDBY TEMPERATURE 80 C Adjust only with materials that would be affected with this elevated standby temperature When using small sample sizes of materials that lose moisture quickly it is recommended that the pan or the pan w filter paper if used be cooled after the pan tare and before adding the sample This can be done quickly and easily by removing the pan or pan w filter paper and fanning them back and forth a few times ENDING CRITERIA If expected moisture content is great
74. re using the ULTRA LOW MOISTURE option checks to ensure that the balance has drifted less than 0 3mg in the preceding 30 seconds since the tare command was issued to the balance This requires that the balance be tracked for the initial 30 seconds If the drift is excessive at the end of that time the balance 1s rechecked every six seconds and the value is compared against the previous 30 seconds of data until the 0 3mg criteria is met Depending upon the situation an ultra low moisture tare can take as long as four minutes The ULTRA LOW MOISTURE option should be used for samples with a moisture content between 0 005 and 0 2 percent This option may be used to improve accuracy for samples with a moisture content in excess of 0 2 percent but will increase the overall testing time When the tare criteria has been successfully met the balance is re tared to zero and the unit beeps to indicate that the it is ready for the sample to be loaded 33 34 To select a PAN TARE OPTION move the highlight bar to the desired choice and press the Selct key To store the new selection press the Esc key gt Sample Tare Option There are five possible choices under this menu The factory default and the most TARE OPTIONS common selection is START WHEN PAN TARE OPTIONS v L SAMPLE TARE OPTIONS 1 STABLE START WHEN STABLE Figure 32 SAMPLE TARE OPTION The balance will start to tare after two sec onds Tare is complete and the te
75. re circuit is not detected A to D failure RTD failure Bridge circuit failure MPU failure Troubleshoot temperature circuit Check RTD connection to board Message generated if A D does not clear in 100mS Bad A D Bad A D timing circuit Troubleshoot A D circuit Something caused the system to crash and reset Usually RAM corruption of some kind Troubleshoot system 65 16 SPECIFICATIONS Description The MAX 1000 an advanced moisture analyzer for the Computrac product line is a sister unit to the highly featured MAX 2000 The MAX 1000 uses the same convection heating feature and the patented prediction algorithm as the MAX 2000 to quickly and accurately measure moisture levels in a variety of materials Some features that are available on the MAX 2000 are not available on the MAX 1000 This reduction in features serves to justify a lower list price for the MAX 1000 which is positioned for the low cost small budget end user The following table describes the MAX 1000 features Feature Dimensions Weight Casework Power Requirements Heating Range Heater Calibration Test Temperatures Balance Sample Size Resolution Balance Calibration Display 66 Specification 235mm H x 300 mm W x 575 mm D 95inHx12inWx 24inD 13 9 kg 32 Ibs Per drawing 7200 0244 110 120 volts 50 60 HZ 1 amp standby or 6 amps heat on or 210 240 volts 50 60 HZ 0 5 amp standby or 3 amps heat on Power con
76. row for thirty seconds then press and hold the down arrow for fifteen seconds NOTE In some situations when the instrument has been exposed to cold temperatures the display may appear to be erratic In those situations open the display panel and allow the instrument and the display to warm up to room temperature 4 5 NITROGEN PURGE SETUP 4 5 1 Some applications such as black liquor solids analysis require the use of a nitrogen purge to remove volatiles from the chamber If a nitrogen purge is to be used and your instrument is factory equipped with the nitrogen purge option attach the diffuser to the inside of the heater box and the hose barbs and tubing to the round ports on the rear of the lid and instrument body G on Figure 7 on page 13 CAUTION Use of nitrogen or other inert carrier gas does not create an explosion proof system 46 MAX 1000 PURGE CONVERSION 4 6 1 Open the heater lid 4 6 2 Remove the plug which is centered in the heater ring 4 6 3 Install the muffler and seal in the opening created by removing the plug 4 6 4 Close the heater lid 4 6 5 From the back of the unit remove the plug located in the upper left corner as viewed from the rear of the heater lid 4 6 6 Install the 007 orifice fitting it has the green insert into the opening created when the plug was removed 4 6 7 From the back of the unit remove the plug from the lower portion of the unit see Figure 7 4 6 8 Insta
77. sed to program the MAX 1000 with information relevant to all operations and test To change parameters specific for an application see the section on the Param key page 45 or on the MEMORY START MENU page 25 To enter the SETUP MENU select that selection on the MAIN MENU and press the Selct key The next screen shown is the SETUP MENU From the SETUP MENU it is possible to change the printer setup set the clock change the access codes customize the data screen and enter or edit a company name The first option is PRINTER SETUP PRINTER SETUP This function is used to inform the instrument of the type of printer MAIN MENU MEMORY START MENU STORED DATA MENU CALIBRATION MENU L Esc 5 Figure 40 SETUP MENU SETUP MENU PRINTER SETUP REPORT SETUP CLOCK SETUP DATA FORMAT SETUP ACCESS KEY SETUP ENEBLCTNNE ETSI Up Figure 41 PRINTER SETUP 7 5 2 connected IBM or Epson Select the type of printer you have by pressing the SELME PRINTER TYPE Edit key OUTPUT PORT LPT AUTO FORM FEED ON The same key will now be the Incr key Press it to change the displayed name from IBM to EPSON Incr 1 If the display is EPSON Press the Decr key to change the displayed name Figure 42 PRINTER TYPE to IBM When the correct printer name is displayed press Accpt key If you are not sure of the
78. st will begin when the balance is stable The balance is stable when there is less than 0 2mg difference in the weight measured on successive weight readings Four other tare options are available These are used with volatile samples or when the instrument is in an unstable environment with excessive vibrations for example These options are START AFTER 3 SECOND TARE Test starts after three seconds of averaging Used for sample materials containing volatile substances such as SAMPLE TARE OPTIONS START WHEN STABLE TE START AFTER 3 SEC TARE solvents which may volatilize during the START AFTER 5 SEC TARE taring process START AFTER 20 SEC TARE START AFTER 5 SECOND TARE OUO NEU TT NN Test starts after five seconds of averaging START AFTER 8 SECOND TARE Figure 33 START WHEN STABLE Test starts after a three second delay and eight seconds of averaging START AFTER 20 SECOND TARE Test starts after a three second delay and twenty seconds of averaging To change the SAMPLE TARE OPTION move the highlight bar to one of the four options and press the Selct key To store the new value press the Esc key 7 2 2 7 2 3 7 2 4 RESULT DISPLAY OPTIONS Test results can be displayed as a percentage of weight lost during the test Moisture percentage weight remaining after the test Solids or as a dry weight Dry Wt basis value Dry weight basis is the weight loss divided by the weight r
79. sted and condenses on the pan support Remove the pan support and balance adaptor carefully and then clean it by wiping with a tissue or paper towel 61 14 TROUBLE DIAGNOSIS SYMPTOM Answer always zero Answers vary too much Blank display Heat will not turn off Moistures too high Moistures too low Moisture never stops increasing No heat 62 DIAGNOSIS Temperature too low No heat Sample too small Sample too small Samples not uniform Sample particles too large Contrast controls not set No power Microprocessor failure Backlight connector disconnected Set wrong Circuit board failure Temperature set too high Bent sample pan Dirty sample pan Debris in balance gaps Dirty heater assembly Temperature too low Sample too small Sample too large Sample needs spreading Other volatiles Balance drifting Voltage selection wrong Wiring failure in heater circuit Heater failure Door sensor failure Temperature setpoint too low REMEDY Raise setpoint See symptom below Increase sample Reduce sample Grind sample Grind sample Adjust contrast Check power cord connections Open front press reset Reconnect Adjust ending criteria Call AZI Lower temp Use new pan Use new pan Clean Clean heater assembly Increase temp Increase sample Decrease sample Spread Try lower temperature Run drift check Check power module at rear of instrument set to correct voltage Call AZI
80. test is in progress a triangle at the bottom left will rotate and the current moisture trend to the present time is shown Once a test is under way test parameters cannot be changed until the test is completed or terminated Quit key Before running a test the down arrow key Param will access menus that allow the test parameters to be changed for the next test The test temperature is the value most often changed The manual describes methods of storing parameter sets for particular test materials in the section on the MEMORY START MENU page 25 The menu system can be accessed by pressing the Menu key at the FINAL TEST screen if the access code control system is not activated If access code control is active edits to the MENU will bring up a message asking for the access code Successfully entering the correct code will then bring up the MAIN MENU For more information on the access code see CHANGE MENU ACCESS CODE on page 43 21 Qqaesinoges AVIN SS3OOv TOYLNOS 1 1 3unavsadia SNOILdO 1 31d vs 31v SYNLVYeSdWAL LYYLSIH SNOLLdO NVd 19Id3Hd SYNLVYAdWAL LYVLS Av dsl 1 sNoudosavi azis aniona awyn 1531 9 107 vasi AVN ANVdIWOO aav LNIHd OL SW3LI 1 SNOLLdO TOMLNOD 1 1 554997 dn
81. the exclusion or limitation of incidental or consequential damages so the above limitations or exclusions may not apply to you No other warranty is expressed or implied including the warranties of merchantability or fitness for a particular purpose In no event shall AZI be liable for consequential and or incidental damages The effective warranty begins on the date of purchase by or lease to the first end user owner Keep the dated bill of sale or invoice for evidence of the effective warranty date when warranty service is requested In the event that any questions or problems should arise in the use or application of your Computrac MAX 1000 unit call AZI Customer Service or your Account Representative toll free at 800 235 3360 or 602 470 1414 74 21 MAINTENANCE CONTRACT Arizona Instrument Corp has a high level of confidence in the reliability of the MAX Our sophisticated circuits advanced design and manufacturing techniques result in a unit that performs reliably over an extended period To demonstrate our confidence we offer an extended warranty maintenance contract For a nominal annual charge AZI will exchange any subassembly or repair any unit at the factory which fails through no fault of the user This exchange or repair is on a no charge basis except for freight Contact AZI and ask for the Maintenance Contract Sales Representative 75 TRADEMARK AND COPYRIGHT PROTECTION Computrac Arizona Instrument AZI
82. the pan support s ability to freely move up and down 12 1 13 After the instrument is cleaned Use a new sample and repeat the weight test five more times Calculate the results If the results are still outside the specified range call AZI Customer Service for assistance 12 2 PRECISION WEIGHT TEST 12 2 1 Run five weight tests and record the results 12 2 2 The recorded results should fall within the following NUMBER OF 5 SAMPLES MEAN 37 48 TO 37 52 COEFFICIENT of LESS THAN 0 03 VARIATION STANDARD LESS THAN 0 01 DEVIATION 12 3 SODIUM TARTRATE TEST The sodium tartrate test verifies the heater and force balance operation Sodium tartrate dehydrate is a chemical with a known moisture concentration which gives up moisture at temperatures greater than 120 C Because of its consistent moisture concentration it is used as a standard in moisture measurement using oven or titration methods To obtain consistently 56 12 3 1 12 32 12 3 3 12 3 4 12 3 5 12 3 6 12 37 12 3 6 12 3 9 reliable results use a high quality or reagent grade ACS certified granular sodium tartrate Avoid using sodium tartrate that contains lumps or has an uneven consistency since lumps indicate the absorption of ambient humidity and will yield variable results Sift the sodium tartrate through a 20 sieve to eliminate any lumps or large crystals that pop off the sample pan during the test The test uses
83. this option has been selected the left right up and down arrows are used to position the cursor and change the letters or numbers The alphanumeric label contains up to 22 positions and can be changed with the arrow keys Pressing Incr starts at A and continues through the alphabet the numbers then the symbols Decr starts at the bottom displaying the symbols first etc Select the item to be edited with the up and down arrow keys and press Edit Press Quit when editing is complete 41 7 5 3 CLOCK SETUP SETUP MENU This function is used to enter the correct PRINTER SETUP REPORT SETUP date and time into the clock system The CLOCK SETUP DATA FORMAT SETUP internal battery saves the clock value and function when the power is off This function should only be required if the internal battery is replaced ACCESS KEY SETUP Use this function to change the time at initial setup when changing for daylight savings time or when the internal battery is replaced If the clock resets all memory in fact Figure 48 CLOCK SETUP whenever the power is off the internal backup battery may need replacement If this happens call AZI Customer Service Ba cdd ond 7 5 4 DATA FORMAT SETUP Figure 49 SET CLOCK ENDING CRITERIA DISPLAY This process controls the display of the PREDICTED END POINT and the ENDING CRITERIA on the FINAL TEST screen during the test Display of these values is useful dur
84. trokes are required to complete a test Simply follow the steps as they appear on the screen and wait for the audible signal at the end of the test The four arrow keys gt and Y are used to navigate through the menu system and to respond to prompts on the screen As an example the Y key down arrow can be pressed any time during a test to end the test The Quit prompt above the key indicates that the test will be canceled when the key is pressed When using the menu system to change a numeric value such as temperature use the right and left arrow keys to select the digit to be changed and the up and down keys to increase or decrease the value of the digit When the changes are completed use the right arrow key to move the cursor off the end of the number to show completion and the up or down keys to accept or cancel the changes made Prompts to remind the user of these conventions are always displayed above the keys when in the value changing modes 3 5 3 5 1 3 5 2 3 5 3 3 6 3 6 1 3 6 2 3 6 3 DATA OUTPUT Test results are displayed on the main panel and can be sent to a printer or to a computer At the lower left of the front panel one of five small icons is always displayed The left most icon is a small rotating triangle which shows that a test is in progress When the test is completed rotation will stop The next icon position to the right shows if the lid is open The center icon looks
85. trol and fuses at rear of unit 25 C to 225 C set point in 1 C increments Temperature accurate 1 C Factory calibration traceable to NIST User set through temperature range for chamber temperature maintenance test temperature control and dual test temperature programming Built in automatic operation 1 gram to 40 grams Moisture 0 01 Balance 0 001 gram Automatic menu driven one point calibration at 20 grams 30 character 9 row LCD with back light display Feature Test Display Interface Moisture Range Repeatability Firmware Memory Access Code Results Display Ending Criteria Programmable Features Consumables Certifications Options Accessories Specification Continuous display of test time current temperature programmed test temperature and current sample weight and calculated weight loss RS 232 9 pin standard Parallel printer PC standard 0 10 to 100 moisture 0 02 standard deviation depending upon program Menu driven through LCD display Storage of last test s results Storage of up to 5 different test parameters plus 2 quality test programs Up to four user selectable codes up to eight digits in length 1 master code and 3 individual codes for specific memory start control One universal code for factory use and override Moisture Solids Dry weight Predict selectable from relaxed midrange or tight Rate from 0 1 minute to 9 99
86. tuation across the balance are not always constant this error often appears as a higher standard deviation for a series of tests on a particular sample Figure 30 PAN TARE OPTIONS The PAN TARE OPTIONS offers the user three mutually exclusive selections to PAN TARE OPTIONS adjust the relationship between tare time FAST and tare error to improve overall operation STANDARD LOW MOISTURE for a given product or purpose The next RA LOW MO table summarizes the menu choices and the parameters associated with each choice Figure 31 FAST SELECT MENU INITIAL TARE POTENTIAL POTENTIAL CHOICE TIME DRIFT ERROR TARE TIME FAST up to 20 mg 6 seconds STANDARD 1 0 to 2 0 mg UP to 60 seconds LOW MOISTURE less than 1 0 mg UP to 2 minutes ULTRA LOW MOISTURE 30 seconds less than 0 3 mg UP to 3 minutes The FAST tare option as the name implies is the fastest If this option is selected the MAX 1000 zeros the balance waits six seconds and records the balance reading as tare weight There is no check for balance drift This could cause the ending error to be as great as 20 milligrams The standard low moisture and ultra low moisture options do check for balance drift caused by temperature changes and offer greater accuracy but at increased tare times In these three options the pan tare algorithm checks to ensure the balance has drifted less than 0 3mg during a variable TARE TIME a few seconds to several minutes For example a pan ta
87. type of printer you have PRINTER SETUP see your printer user s manual or contact PRI HIER IMS BOTH AZI Customer Service AUTO FORM FEED ON The output port is selected in the same way First move the selector bar to OUTPUT PORT and press the Edit key Then Incr or Decr until the correct selection is displayed Figure 43 OUTPUT PORT Move the select bar to AUTO FORM FEED and press the Toggle key to REPORT CONTROL OPTIONS select between OFF and ON If AUTO FORM FEED is selected the printer will EN Tens el m advance to the top of the next page do a page eject after each report When the correct selection is displayed press the Esc key two times to return to the OPENING MENU NENNEN CNN CET Down REPORT SETUP Figure 44 REPORT ENABLED This menu allows for the program settings related to the final printout of a test It is in this menu that the printer is enabled and the printout is customized to your needs 39 40 REPORT CONTROL OPTIONS This screen controls output to the printer and the RS 232 port It also controls how often the instrument sends data To select this option move the selector REPORT CONTROL OPTIONS bar in the SETUP REPORT to REPORT m tee YER A CONTROL OPTIONS then press a key REPORT INTERVAL 2 Second labeled Selct This begins the report control change process The selector bar will be positioned on the last option oa changed To c
88. wing are the guidelines for developing parameters TEST TEMPERATURE Adjust as needed Be sure to use a temperature that is high enough to drive off all the moisture but does not degrade the material in any appreciable way If after establishing good accuracy with the material the test times are longer than desired then try using HISTART Start with a HISTART temperature that is 20 C higher than the TEST temperature STANDBY TEMPERATURE Dry samples 50 C Water based solutions 50 C Solvent based solutions 50 C If possible experiment with a standby temperature of 80 C especially with those samples using test temperatures greater than 120 C ENDING CRITERIA If accuracy and or reproducibility is not acceptable try working with rate ending criteria If accuracy and reproducibility is still not acceptable contact your Sales Representative for assistance If possible when acceptable results are established using either auto or manual predict work with the material with the rate ending criteria to see if the results can be improved SAMPLE SIZE SUGGESTED ENDING CRITERIA SAMPLE TYPE SIZE RATE Dry samples 5 7 grams 0 1 For moisture levels lt 0 1 15 20 grams 0 05 Water based solutions 1 2 grams 0 2 0 1 Solvent based solutions 1 2 grams 0 2 0 1 69 70 If test times are too long with water or solvent based solutions reduce the sample size in 1 gram increments until the desired test time is reached typicall
89. y 3 5 minutes Begin water and solvent solution sample testing with flat pans SUGGESTED TECHNIQUES LIQUID SAMPLES It is recommended that the pan or the pan w filter paper if used be cooled after the pan tare and before the sample is added This can be done quickly and easily by removing the pan or pan w filter paper and fanning back and forth a few times Apply sample quickly using a syringe or pipette in a spiral motion over the surface of the pan For extremely volatile samples use the syringe test procedure See SYRINGE TEST page 43 SUGGESTED TECHNIQUES DRY SAMPLES Spread sample evenly over the surface of a waffle pan If desired you may place the appropriate amount of sample in center of pan Then remove pan and sample from balance and place on flat surface Shake the pan to distribute the sample evenly TARE OPTIONS Dry samples Pan tare Tare Selection If moisture is 196 Low moisture If moisture is lt 0 1 Ultra low moisture Sample tare When stable 3 seconds Water based solutions Pan tare Low moisture Sample tare 3 seconds Solvent based solutions Pan tare Low moisture Sample tare 3 seconds LIFT COMPENSATION If moisture level is lt 0 2 adjust as needed The higher the lift percentage the lower the moisture value will be Call AZI Customer Service if you have any questions PARAMETER DOCUMENTATION To ensure optimum and efficient correlation reproducibility and for record keeping purposes reco

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