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PET Plus User Manual 1

Part No. 01/3514

June 2011

PET Plus

Viscometer

including Polymer Dryer and Polymer Grinder

User Manual

Summary of Contents for Davenport PET Plus

Page 1: ...PET Plus User Manual 1 Part No 01 3514 June 2011 PET Plus Viscometer including Polymer Dryer and Polymer Grinder User Manual...

Page 2: ...structions warnings or cautions in the instrument s Instruction Manual If a manufacturing defect is found AMETEK will replace or repair the instrument or replace any defec tive part thereof without ch...

Page 3: ...GH TEMPERATURES AND MOLTEN POLYMER ARE INVOLVED IN THE VISCOMETER TESTING PROCESS ES ALWAYS WEAR HEAT PROTECTING GLOVES WHEN HANDLING THE DIE FOLLOWERS PROBE CLEANING TOOL AND AREAS AROUND THE HEATED...

Page 4: ...3 5 1 Default Test Setups 33 5 2 Renaming an Existing Test Setup 34 5 3 Creating a New Test Setup 35 5 4 Defining a Test Setup 36 5 5 Password Protection 37 6 0 training mode 39 6 1 Selecting Training...

Page 5: ...acing the Drive Belt 78 14 6 Result Discrepancies 79 14 7 Faults in Pressure System 79 14 8 Basic Electrical Checks 79 14 9 Changing a Damaged Probe Rod 80 15 0 calibration 81 15 1 Selecting the Calib...

Page 6: ...measure the movement of the follower The rate of extrusion is accurately measured by the probe which is designed to operate under the high pressure conditions within the barrel during extrusion The sy...

Page 7: ...UK The equipment can store up to 600 test results internally and the statistics and results can be easily viewed on the control console display If 600 tests are already stored then when the next test...

Page 8: ...in practice that the IV drop from polymer chip to preform is usually in the range of 0 02 to 0 03 IV 1 5 measurement range The IV measurement range is approximately 0 45 to 1 40 using dies from 0 015...

Page 9: ...virgin polymer mixture Drier Efficiency Drop of IV in extruder Target value for moisture determination Melt stability degradation rate IV in finished product re grind 4 Relatively easy test to operat...

Page 10: ...and bottom blanking plug 6 Barrel Cleaning Tool p n 778 55 Used to charge the sample push a clean ing cloth down the barrel and for die O ring fitting 7 Die Retaining Nut and Fibre Sealing Washer p n...

Page 11: ...o 284 C 16 Thermometer 293 C 297 C p n 338 104 1032 Used when calibrating to 295 C 17 Tweezers p n 92 0404 Used to hold hot die and followers 18 RS232 Cable p n 09 0639 2 2 consumable items The PET Pl...

Page 12: ...er drier 2 Vacuum Taps and Hose Quantity 6 Shown Polymer Dryer This assembly is used to connect the phials to the polymer drier It is also used to isolate the phials from the vacuum line at the end of...

Page 13: ...nd is used to collect molten polymer from the produc tion extruder to check the IV of the polymer during the extrusion process It is mainly used to collect a sample from a textile spinneret and is not...

Page 14: ...Hot Plate To aid cleaning of follower put the dirty followers on the hot plate PET will carbonate and be easier to remove 2 9 4 PTFE Tape To seal gas connection joints 2 9 5 Razor Blade Scalpel To scr...

Page 15: ...ight may be applied to the top of the barrel via the cleaning tools 2 The equipment should only be used in a well ventilated environment however the area needs to have a stable temperature and be drau...

Page 16: ...ituated within two metres of both electrical and nitrogen gas supplies The polymer grinder must be situated as close as possible to the vacuum pump if this drying option is used The polymer grinder is...

Page 17: ...g is heard or a leak is shown up by soap solution then gas will escape allowing a drop in pressure A leak can usually be cured by using PTFE tape on the leaking connection and then re connecting and t...

Page 18: ...outlet port item 7 a gas ballast control item 5 and a mode selector item 11 When the pump is switched off an inlet valve seals the inlet and prevents the suck back of air and oil into the vacuum syste...

Page 19: ...fter a few minutes recheck the oil level and top up if necessary Refit the oil filler plug and tighten firmly by hand but do not over tighten 3 9 fitting the oil mist filter to the pump Unscrew the re...

Page 20: ...eal filter washer over the top of the inlet port item 4 noting that the conical filter must be positioned downwards into the port Place the hose connector on top of the filter washer Fit the clamp aro...

Page 21: ...hose connector on the inlet port of the pump Note that an additional clamp is not required because the vacuum will secure the hose to the hose connector Push the other end of the rubber hose over the...

Page 22: ...lock The mains switch has an internal lamp and the equipment is powered when the lamp is lit Only connect to the supply specified on the Serial Number nameplate situated alongside the mains input conn...

Page 23: ...em 1 to the mains outlet on the rear of the drier block The pump is switched on and off by the Vacuum Power switch on the front panel of the drier block This switch is marked O and I The switch is ON...

Page 24: ...achieve maximum vacuum Rotate the mode selector item 11 fully anti clockwise to select the High Throughput mode Large Pear Drop Note that this control may be difficult to rotate Set the gas ballast c...

Page 25: ...uum This setting MUST be used to achieve maximum vacuum Rotate the mode selector fully clockwise to select the High Vacuum mode Small Pear Drop Shown Rotate mode selector fully clockwise for High Vacu...

Page 26: ...t the rear of the grinder using the supplied plastic hose Unscrew the oil filler cap then fill the lubricator with the correct grade of oil e g Shell Morlina 10 or Tellus R10 The top of the oil must b...

Page 27: ...pressure when the unit is running pull the orange knob downwards then rotate the knob to achieve the correct pressure Push the knob upwards again after adjustment to lock the regulator setting The gr...

Page 28: ...28 PET Plus User Manual 3 17 industrial grinder AMETEK recommends the Fritsch Pulverisette 15 This equipment connects to the mains using a standard mains lead Shown Fritsch Pulverisette 15...

Page 29: ...Select Test screen will be automatically displayed after 3 seconds This screen is used to select one of the pre defined test set ups as shown later Press the key under EDIT to set the date time and t...

Page 30: ...y under SET MINUTE Ensure that the time is set to UTC GMT and NOT to the LOCAL TIME Press the ENTER key to return to the UTC TIME screen To change the Date press the key under SET DATE To change the D...

Page 31: ...Press the key under DATA FORMAT Each of the options toggle when the relevant key is pressed The STD DEV N has options of n and n 1 The Decimal Separator has options of Dot and Comma The ASCII Delimit...

Page 32: ...t test set up screen Selecting Melt Temperature Up to 0 7 IV 284 C Above 0 7 IV 295 C 4 4 which test temperature to use Generally samples of IV up to 0 70 should be tested at 284 C and IVs over 0 70 a...

Page 33: ...or a 20 thou die 0 0508cm The test set up called TRAINING sets the equipment into a special training mode and does NOT perform a melt test Note that the special training mode is only available if the...

Page 34: ...ed When the required test set up is displayed press the key under EDIT to display the edit test screen Press the key under RENAME to display the rename test screen Press the key under CLEAR ALL to del...

Page 35: ...isplayed press the key under CREATE to display the edit test screen Press the key under RENAME to display the rename test screen Press the key under CLEAR ALL to delete NEW_TEST then enter the require...

Page 36: ...for this information To change a die dimension press the key under DIE LENGTH or DIE DIAMETER then enter the required values in cm This screen is used to define the pass fail feature At the end of ev...

Page 37: ...word protected to prevent unauthorised changes by non technical personnel This feature also prevents any stored test data from being erased Display the Select Test screen Press the key under EDIT to d...

Page 38: ...is pressed when the Select Test screen is displayed If the correct password is entered then the first Global Options screen is displayed otherwise the Select Test screen is re displayed Please contac...

Page 39: ...key under or to select TRAINING Press the key under SELECT to display the Analysis screen This screen displays the requested barrel temperature the actual barrel temperature the nitrogen pressure wit...

Page 40: ...until either the key under SELECT is pressed or the PC software is started The heaters are then active and the barrel will heat and maintain the required test temperature until the equipment is switc...

Page 41: ...vertical column If the probe is not connected the warning screen below will be shown Also note that the intermediate screen shown below will be displayed if the barrel is not at the required temperat...

Page 42: ...T THE BARREL IS CLEAN Fold a cleaning patch in two then place over the tip of the barrel cleaning tool Push the cloth into the top of the barrel using the tool and push the tool down completely throug...

Page 43: ...taining nut with the end containing the O Ring facing upwards Screw the die retaining nut with the die to the bottom of the barrel and hand tighten using the tightening tool Loosen off by about 1 10th...

Page 44: ...nto the top of the barrel n Press the key under GAS OFF to stop the flow of nitrogen gas n Insert the polymer into the top of the filling funnel n Remove the filling funnel from the top of the barrel...

Page 45: ...ly switched to full pressure to perform the test The gas pressure inside the barrel is displayed on this screen If the required gas pressure is known testing a sample with a known IV then the pressure...

Page 46: ...r will require a low gas pressure If the Probe Speed is below 0 5 the equipment will beep and display the screen below to request that the gas pressure is increased Increase the pressure using the pre...

Page 47: ...sample degrades After 6 minutes of total test time the Calculated IV screen is displayed This shows the estimate of the actual IV and this also changes during the test as the sample degrades The scree...

Page 48: ...at the pressure displayed on the screen is nominally zero Using heat protecting gloves remove the probe from the barrel and if necessary wipe any polymer from the tip Store the probe in the probe hold...

Page 49: ...f silicone oil may be used to coat the barrel and make future cleaning easier warning The cloth and barrel cleaning tool may become hot during the cleaning process Wear heat protecting gloves when han...

Page 50: ...l change when the die is clean Press the key under GAS OFF to release the gas pressure check that the display shows nominally zero then remove the top cap using the tightening tool 7 13 STORING THE DI...

Page 51: ...t name ID and a Date Time ID that is created from the internal clock inside the equipment Therefore statistics can be calculated and displayed for each of the defined test set ups and the test data ca...

Page 52: ...the data for any other test select the test using the keys Note that the inner 2 keys move through the data one test at a time and the outer 2 keys move through the data 10 tests at a time The screens...

Page 53: ...ta can be exported using the supplied RS232 cable to HyperTerminal etc The RS232 protocol is 9600 Baud Rate 8 Data Bits 1 Stop Bit and No Parity To export the data press the key under EXPORT The test...

Page 54: ...n method This test will ONLY give the same IV as the solution method if ALL moisture is removed from the polymer before testing less than 20ppm moisture The supplied granules must be dried for 16 to 2...

Page 55: ...scopic materials and incorporates the following features 1 A temperature controlled heated block that has been machined to hold and heat six sample phials The temperature controller can control the te...

Page 56: ...be required to get the best and most repeatable results 9 5 DRYING PROCEDURE Using a suitable container and laboratory balance weigh out 3 8g of polymer chip Pour the sample into a sample drying tube...

Page 57: ...place in the storage areas at the sides of the polymer drier warning Hot tubes Wear Heat Protective Gloves Note that the plastic tubes MUST still be attached to the quick release connectors and the v...

Page 58: ...stic vacuum tube so that the lever is in line with the vacuum pipe to release the vacuum A slight hissing sound will be heard as the vacuum draws hot dry nitrogen into the sample phial Press the key u...

Page 59: ...sential 10 2 POLYMER DRIER The Polymer Drier has been designed for drying PET and other hygroscopic materials and incorporates the following features 1 A temperature controlled heated block that has b...

Page 60: ...ts 10 5 USING THE POLYMER CHIP GRINDER The Polymer Chip Grinder is designed to grind polymer chips down to particles of either 1mm or 0 5mm using the supplied grinder bowls Davenport recommends only u...

Page 61: ...cut masson cut or lace cut material and place into the grinding bowl with 0 5mm wide slits Place a clean receiving bowl under the funnel at the front of the grinder to collect the ground sample Place...

Page 62: ...nding bowl until the level of the liquid is about 1cm or 1 2 above the remaining polymer chip level Allow the liquid nitrogen to just evaporate to dryness then lower the grinder lid and lock with the...

Page 63: ...o adjust Rotate the relevant screw to set the unit as shown below A h 1 Set the dial to 0 82 to select 50 minutes Set the dial to 0 92 to select 55 minutes Using a suitable container and laboratory ba...

Page 64: ...g the lever until it is in line with the vacuum pipe so that powder is NOT drawn up the plastic tube by the initial vacuum Wait for 5 minutes to ensure that a good vacuum is applied to the samples the...

Page 65: ...vacuum pipe Press the release lever on the front of the quick connector so that the metal tube springs up out of the connector Note that the quick release connector has a sealing valve so that the va...

Page 66: ...then carefully pour the powder from the phial into the top of the filling funnel Remove the filling funnel from the top of the barrel Insert a clean follower into the top of the barrel Insert the char...

Page 67: ...his is a metal cylinder containing a central dispensing mechanism that splits the cylinder into 2 chambers Nitrogen is passed through the two chambers to purge any air from the device One chamber has...

Page 68: ...spense a quantity of polymer into the container Weigh the dispensed polymer and check that it weighs 3 8g 0 1g If the weight is not correct the dispensing mechanism must be adjusted 11 4 ADJUSTING THE...

Page 69: ...valve Do NOT remove the top or bottom caps Take the transfer vessel to the production area If a nitrogen supply is available at the sampling site either 1 Reconnect the nitrogen to the Schrader quick...

Page 70: ...AS OFF to stop the flow of nitrogen gas Remove the bottom cap from the transfer vessel Place the bottom of the transfer vessel onto the top of the filling funnel Turn the dispensing lever until the le...

Page 71: ...re that the top and bottom PTFE caps are a tight fit on the unit and that the sample melt pot is clean and dry Remove the top cap and using heat resistant gloves hold the pot under either a sample ble...

Page 72: ...ny air that may be present Allow the gas to flow for a few seconds to ensure that the barrel is full of nitrogen Press the key under GAS OFF to stop the flow of nitrogen gas Remove the bottom plug fro...

Page 73: ...mples The equipment must be used in accordance with the manufacturers instruction manual and ear protection must be used at all times in the vicinity of the grinding equipment Note that liquid nitroge...

Page 74: ...LING LIQUID NITROGEN WHICH IS AT 196 C Leave the samples immersed in the liquid nitrogen until the liquid nitrogen has ceased to boil showing that the sample has been cooled to the correct temperature...

Page 75: ...ke a vertical cut in the ring using a sharp pointed scalpel or Craft Knife Stretched O ring O ring reformed to correct size Shown Contraction Tool Shown Expansion Tool O ring Die warning Always wear c...

Page 76: ...the old washer by levering it out via the slot cut into the top of the nut Place the new washer into the circular recess around top of nut and press down firmly until washer is evenly embedded 14 3 S...

Page 77: ...encer Unscrew the brass silencer then pull out from the top cover Unscrew and remove the two 2 domed nuts and washers securing the top cover to the main lid assembly Lift the top cover away from the l...

Page 78: ...grub screws in the motor pulley Loosen the motor securing clamp Pull the motor upwards and pull the pulley downwards until the pulley can be removed from the end of the motor shaft Remove the motor f...

Page 79: ...peration and construction No form of regular maintenance is required except that the unit is kept in a clean condition 14 7 POSSIBLE FAULTS IN PRESSURE CONTROL SYSTEM LOSS OF PRESSURE 1 Gas cylinder e...

Page 80: ...ed as shown below Loosen the grub screw securing the probe bush to the main body of the probe then unscrew and remove the probe bush Remove the probe rod and replace with a new one Re assemble the pro...

Page 81: ...E Display the Select Test screen to display one of the pre defined test set ups Press the key under EDIT to display the edit test screen Press the key under GLOBAL to display the first Global Options...

Page 82: ...mperature Fit the die to the bottom of the barrel then insert approx 2 grams of PET note Use Polythene instead of PET if using a mercury in glass thermometer PET will break a glass thermometer when it...

Page 83: ...der ACCEPT to correct the measured temperature value If a calibration point had already been entered at 300C or approx this value a warning message will be displayed Press the key under OVERWRITE POIN...

Page 84: ...ogen Gas is Off and also displays the measured pressure Check that the measured pressure is 0Bar 0 1Bar Note that the Zero reading can vary slightly with changes in atmospheric pressure If the measure...

Page 85: ...the same as the reference pressure 0 1Bar press the key under CAL POINT to display the cal point screen Press the key under CHANGE TRUE then enter the pressure measured by the reference pressure gaug...

Page 86: ...ipment MUST be left switched on for at least 15 minutes BEFORE performing this calibration The probe is calibrated by moving the probe rod a known distance then indicating this distance into the syste...

Page 87: ...ed Press the key under OVERWRITE POINT to accept this new calibration point Press the ENTER key to return to the Probe Calibration screen Set the calibration micrometer to 25 000mm Check that the meas...

Page 88: ...00mm Check that the measured probe is 25mm 0 01mm If the measured probe is not 25mm 0 01mm enter a new calibration point overwriting the previous point Reset the calibration micrometer to 0 000mm Chec...

Page 89: ...xcel and or Microsoft Access 16 2 ADVANCED SECURITY The NEXYGEN Plus PET software has an optional Security and Audit Trail Feature which can be configured to prevent unauthorised personnel from using...

Page 90: ...p wizard will be automatically shown Click on the NEXT button to proceed Select the I Agree option then click on the NEXT button Click on the NEXT button to proceed The dialog shows the default shared...

Page 91: ...og shows the default program folder and this can be changed if required Select the Everyone option to create a Start Menu item for all users then click on the NEXT button to proceed Click on the NEXT...

Page 92: ...ton A screen similar to that shown will be displayed while the VBA is automatically configured 16 4 CONFIGURING THE SOFTWARE CON SOLE Connect the supplied RS232 cable part number 09 0639 between the r...

Page 93: ...ng the NEXYGEN Plus PET software Click on the CREATE A NEW BATCH OF TESTS button on the Welcome screen shown Note that if the Welcome screen is not displayed it can be displayed by clicking on the 9th...

Page 94: ...temperature and the die dimensions as shown on the die certificate If sample identification is required for traceability of results a pre test dialog can be displayed to enter this information To def...

Page 95: ...as required Click on the RESULTS tab then click on the PET Icon to display the available test results Click on the required result title e g IV Results to display the available results Select the req...

Page 96: ...displayed as shown Select the required test file then click on the OPEN button Note that the above steps do not have to be performed if the test is run immediately after the test file has been defined...

Page 97: ...ear of the vertical column If the probe is not connected the warning screen below will be shown Also note that the intermediate screen shown below will be displayed if the barrel is not at the require...

Page 98: ...awn through the IV values and the IV at Zero will be calculated The selected test results will also be calculated and stored in the data table To perform the next test click on the NEW button at the l...

Page 99: ...then select PROPERTIES to display the dialog shown Click on the LIMITS Tab at the top of the screen then set suitable PASS FAIL limits e g between 0 78 and 0 82 Note that BOTH limits MUST be defined C...

Page 100: ...M charts can also be viewed Note however that 10 or more rows are normally required to view the XBAR RANGE chart because this normally groups the test results into groups of 5 rows Note that the XBAR...

Page 101: ...Cp and Cpk values are calculated and are displayed at the left hand side of the chart The Default Sub Group size is 5 but this can be changed by selecting the Main Menu item of EDIT SPC SETTINGS as sh...

Page 102: ...ing Bench mounting Enough bench space will also be needed for the optional computer key board and possibly printer Optional Computer PC compatible Optional software supplied on CD Probe Unit Linear Vo...

Page 103: ...June 2011 Visit us at www lloyd instruments com The material in this document is for information purposes only and is subject to change with out notice While reasonable efforts have been made in the...

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