Setaflash Series 3 Active Cool Closed Cup 33200h2a

Transcript

Pubn No: 33200H2A Installation, Operating and Maintenance Instructions SETAFLASH SERIES 3 ‘ACTIVE COOL’ CLOSED CUP FLASH POINT TESTERS Models 33200-2 & 33250-2 London Street, Chertsey, Surrey, KT16 8AP Telephone: +44 (0) 1932 564391 Facsimile: +44 (0) 1932 568363 Email: [email protected] Web: www.stanhope-seta.co.uk Issue A 10 Jun 2007 Pubn No: 33200H2A SAFETY NOTICES WARNING: 1) THIS INSTRUMENT IS USED TO TEST MATERIALS THAT MAY BE HAZARDOUS WITH REGARD TO FLAMMABILITY, COMBUSTIBILITY, VOLATILITY, TOXICITY OR THE GENERATION OF SMOKE AND VAPOURS. 2) IT IS THE USER’S RESPONSIBILITY TO ENSURE THAT ALL RELEVANT REQUIREMENTS OF LOCAL AND NATIONAL HEALTH AND SAFETY LEGISLATION ARE COMPLIED WITH DURING INSTALLATION AND OPERATION OF THIS INSTRUMENT, AND THE STORAGE, PREPARATION AND DISPOSAL OF SAMPLE. 3) PARTS OF THIS INSTRUMENT REACH TEMPERATURES EXCEEDING 100°C. 4) READ THIS MANUAL BEFORE INSTALLING OR OPERATING THE INSTRUMENT. 5) THIS INSTRUMENT SHOULD ONLY BE INSTALLED AND OPERATED BY TRAINED STAFF, WHO ARE FAMILIAR WITH THE RELEVANT LABORATORY AND ENGINEERING PRACTICES. 6) THIS INSTRUMENT MUST NOT BE LEFT UNATTENDED WHEN IN USE. 7) ALWAYS WEAR SAFETY GLASSES AND PROTECTIVE CLOTHING WHEN INSTALLING OR OPERATING THIS INSTRUMENT. SETA and the logo are registered trademarks of Stanhope-Seta Ltd. © 2007 by Stanhope-Seta, all rights reserved. The copyright in this work is vested in Stanhope-Seta. Reproduction in whole or part is strictly prohibited, except with the written consent of Stanhope-Seta, and then only on the condition that this notice is included in any such reproduction. The information contained in this publication is believed to be accurate and correct at the time of printing. However Stanhope-Seta cannot accept responsibility for any omissions or errors. If the user of this publication has any comment, query or suggestion, please contact Stanhope-Seta Ltd. Due to the company’s policy of improving products, the instrument supplied may differ slightly from that detailed within this document. Stanhope-Seta Ltd reserve the right to change or alter the specifications, operating procedures etc detailed within this document. Issue A 10 Jun 2007 2 Pubn No: 33200H2A PRELIMINARY MATERIAL Figure 1 33200-2 Setaflash Series 3 ‘Active Cool’ Closed Cup Flash Point Tester PURPOSE OF THIS MANUAL This manual has been prepared to assist in the preparation, use and care of the 33200-2 and 33250-2 Setaflash ‘Active Cool’ Closed-Cup flash point testers. This manual is not intended to replace the appropriate Test Methods, which should be consulted to ensure full compliance with the requirements. EQUIPMENT IDENTIFICATION The model number and serial number of the instrument are marked on an identity plate mounted on the rear of the instrument. The power supply voltage and frequency are also shown. This information must be quoted in any technical query, or when ordering accessories and spare parts. This manual is only applicable to the Setaflash models 33200-2 and 33250-2. The version number of the software installed in this instrument will be displayed momentarily when the tester is switched on. The serial number and software version must be quoted in any technical query, or when ordering accessories and spare parts. 3 Issue A 10 Jun 2007 Pubn No: 33200H2A CONTENTS SAFETY NOTICES........................................................................................................... 2 PRELIMINARY MATERIAL.............................................................................................. 3 PURPOSE OF THIS MANUAL.................................................................................................................... 3 EQUIPMENT IDENTIFICATION .................................................................................................................. 3 CONTENTS ...................................................................................................................... 4 LIST OF FIGURES ........................................................................................................... 5 1. CONFORMITY .......................................................................................................... 6 1.1. 1.2. 1.3. 2. APPLICATIONS ............................................................................................................................ 6 QUALITY ASSURANCE ............................................................................................................... 6 REGULATORY CONFORMANCE................................................................................................ 6 DESCRIPTION.......................................................................................................... 7 2.1. SERIES 3 FLASH POINT TESTERS ............................................................................................ 7 2.2. OVERVIEW – MODEL 33200-2 .................................................................................................... 7 2.3. SAFETY FEATURES .................................................................................................................... 9 2.3.1. OVER-TEMPERATURE CUT-OUTS ........................................................................................ 9 2.3.2. TEMPERATURE WARNING LED............................................................................................. 9 2.3.3. OVER CURRENT CUT-OUT..................................................................................................... 9 2.3.4. RESETTING THE CUT-OUTS .................................................................................................. 9 2.3.5. INCORRECT VOLTAGE ........................................................................................................... 9 3. INSTALLATION - GENERAL ................................................................................. 10 3.1. 3.2. 3.3. 3.4. 3.4.1. 3.4.2. 4. OPERATION ........................................................................................................... 13 4.1. 4.2. 4.2.1. 4.2.2. 4.2.3. 4.3. 4.3.1. 4.3.2. 4.4. 4.5. 4.5.1. 4.5.2. 4.6. 5. 5.1. 5.2. 5.3. 5.4. 6. 7. 8. UNPACKING ............................................................................................................................... 10 LOCATION .................................................................................................................................. 10 POWER SUPPLY CONNECTIONS ............................................................................................ 11 GAS SUPPLY.............................................................................................................................. 11 GAS CANISTER...................................................................................................................... 11 GAS CANISTER CHARGING ................................................................................................. 12 SAMPLE PREPARATION........................................................................................................... 13 INSTRUMENT PREPARATION .................................................................................................. 13 SAMPLE CUP ‘O’ RING CHECK ............................................................................................ 13 SETTING THE TEST FLAME SIZE ........................................................................................ 14 SWITCHING THE POWER ON............................................................................................... 15 SETTING TEST PARAMETERS................................................................................................. 16 SETTING THE TIMER............................................................................................................. 16 SETTING THE TEMPERATURE AND UNITS (°C/°F)............................................................ 17 RUNNING A TEST ...................................................................................................................... 18 RESULTS .................................................................................................................................... 20 FLASH ..................................................................................................................................... 20 NO FLASH............................................................................................................................... 21 END OF TEST ............................................................................................................................. 22 CALIBRATION........................................................................................................ 23 DESCRIPTION ............................................................................................................................ 23 SCHEDULE ................................................................................................................................. 23 PROCEDURE .............................................................................................................................. 23 CALIBRATION CHECK .............................................................................................................. 26 VERIFICATION ....................................................................................................... 29 MAINTENANCE...................................................................................................... 30 FAULT FINDING..................................................................................................... 31 Issue A 10 Jun 2007 4 Pubn No: 33200H2A 9. REPAIR ...................................................................................................................32 9.1. 9.2. 9.3. 9.4. 10. 11. 12. 12.1. 12.2. REPLACING A FLASH DETECTOR PROBE............................................................................. 32 REPLACING THE "O" RING SEAL............................................................................................ 32 REPLACING THE GAS CANISTER AND TUBING.................................................................... 33 REPLACING THE LID/SHUTTER ASSEMBLY.......................................................................... 34 SPECIFICATION...............................................................................................35 ACCESSORIES ................................................................................................36 SPARES ...........................................................................................................37 SPARES AVAILABLE................................................................................................................. 37 SUGGESTED SPARES FOR 2 YEARS (2000 TESTS) ............................................................. 37 13. FREQUENTLY ASKED QUESTIONS ..............................................................38 APPENDIX A: SETA SOLIDS DISPENSER 13747-0 ................................................39 LIST OF FIGURES Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 33200-2 Setaflash Series 3 ‘Active Cool’ Closed Cup Flash Point Tester.................................... 3 Main Component Parts ................................................................................................................. 7 Gas Canister and Related Components ..................................................................................... 11 Flash Detector Probe Replacement ............................................................................................ 32 Sample Well 'O' Ring Seal Replacement.................................................................................... 33 Gas Canister Replacement ......................................................................................................... 33 Lid/Shutter Assembly Replacement ............................................................................................ 34 5 Issue A 10 Jun 2007 Pubn No: 33200H2A 1. CONFORMITY 1.1. APPLICATIONS The Setaflash 33200-2 is a Closed Cup Flash Point Tester that conforms* to the following:ASTM D1655; ASTM D3278; ASTM D3828; ASTM D7236 BS 3900 Part A13; BS 6664 Parts 3 & 4; BS EN456 CHIPS Regulations Classification of Dangerous Goods for Carriage: Viscous and Non-viscous Liquids Def Stan 91-91 EPA 102 A & B IP 303 (Obs); IP 523; IP 524; IP 534 ISO 3679; ISO 3680 UN Class 3 Non-viscous Flammable Liquids. * Within the temperature range of the instrument. 1.2. QUALITY ASSURANCE 1) Each instrument has been fully tested, validated and calibrated at Stanhope-Seta in accordance with an ISO9001 Quality Assurance System. 2) All parts and subassemblies have been checked against test procedures and specifications before final assembly. 1.3. REGULATORY CONFORMANCE 1) These instruments conform to the safety requirements of BS EN1010-1. 2) These instruments conform to the EMC requirements of BS EN61326 and related standards. 3) These instruments are CE tested and marked. 4) Instruments supplied by Stanhope-Seta are in conformance with RoHS (Restriction of the use of certain Hazardous Substances) in Electrical and Electronic Equipment Regulations. 5) Stanhope-Seta operate a policy in conformance with WEEE (Waste Electrical and Electronic Equipment) Directives, and will provide advice on disposal of Seta instruments on request. Issue A 10 Jun 2007 6 Pubn No: 33200H2A 2. DESCRIPTION 2.1. SERIES 3 FLASH POINT TESTERS The Setaflash Series 3 Testers are a range of compact bench top/portable instruments designed to carry out 'flash/no flash' tests or to determine flash point values up to 300°C (depending on model). The operating principle of Setaflash Series 3 Testers is that a cup, containing the sample to be tested, is electrically heated to a user set test temperature, then a manual flash test is carried out. On Closed Cup models, a shutter in the lid is opened and a test flame is dipped into the vapour space above the sample. Open Cup models have the test flame swept across the face of the sample cup. It can be determined if a sample has a flash point above or below the test temperature by detecting whether a flash has occurred or not. A sequence of tests at different temperatures can be used to determine the flash point of the sample. There are four Closed Cup variants of the Setaflash Series 3 Tester; Model 30000-0; Model 33000-0 (Series 3 ‘Plus’), is similar to the model 30000-0, with the addition of a ramp function to automatically increment the temperature for repeated tests until a flash is observed, or the end of the search range is reached; Model 33200-2 (Series 3 ‘active cool’), is similar to the model 33000-0, but utilises peltier cell technology to heat the sample cup, and provide active cooling for sub-ambient tests, and Model 33250-2, is similar to the Model 33200-2, but is fitted with a Corrosion Resisting-Cup. An Open Cup tester, Model 31000-0, is also available. All Closed Cup testers feature automatic flash detection. All models except the 33200-2 and 33250-2 have a temperature range of ambient to 300°C (0 to 300°C when pre-cooled with the optional Coolant Module). The 33200-2 and 33250-2 have a temperature range of 10 to 130°C (50 to 266°F), at an ambient temperature of 20°C, without pre-cooling by external means. OVERVIEW – MODEL 33200-2 / 33250-2 CONTROL VALVE ON/OFF GAS VALVE PINCH VALVE START/STOP AND SET TIMER BUTTON FLASH DETECTOR PROBE FLAME SIZE MARK SHUTTER HANDLE APERTURE FOR THERMOMETER SET TEMPERATURE/ RESET FLASH DETECTOR BUTTON CONTROL KNOB TEST JET (4mm DIA.) SHUTTER PILOT JET LED INDICATOR FILLER ORIFICE T A U IO LID LOCK N C 2.2. H OT ON/OFF GAS VALVE ON AIR OUTLET GRILL DECREASE OFF INCREASE ON/OFF POWER SWITCH 1 CONTROL VALVE BUTANE GAS CANISTER 0 POWER SUPPLY UNIT CONNECTION (PSU SUPPLIED) FLASH DETECTOR CONNECTION Figure 2 Main Component Parts 7 Issue A 10 Jun 2007 Pubn No: 33200H2A The aluminium (33200-2) or Stainless Steel (33250-2) sample cup is heated / cooled by a peltier cell module. The heatsink for the peltier cell module is cooled by a fan. The sample cup, peltier cell module, heatsink and fan are assembled into a single unit. The peltier drive utilises high frequency switching to achieve high efficiency heating / cooling. A precision platinum resistance thermometer (Prt), integral with the sample cup, measures the temperature of the cup, providing data for the display and the temperature controller. The gas supply for the pilot and test jets is provided by a small refillable butane gas canister that rests in a holder attached to the rear of the instrument. The instrument operates from an external 20V power supply unit (supplied). The units of temperature can be set as either degrees Celsius (°C) or degrees Fahrenheit (°F). Whenever the units are changed, the temperature is reset to 20°C or 68°F. The native mode of 33200-2 is degrees Celsius (ie all measurements and ramp rates are °C), with a conversion factor being applied to the data for readings in Fahrenheit. On power up the instrument always defaults to °C and sets resets the start temperature to 20°C. The control panel comprises two push buttons, a single control knob, and a display. Left Hand Button: When pressed and held down, the control knob may be rotated to set the temperature. When momentarily pressed then released, the flash detector probe is reset ready for the next test. Right Hand Button: When pressed and held down, the control knob may be rotated to either select the mode of operation, or set the time interval for the test. When momentarily pressed, the timer is started/stopped. When momentarily pressed during the temperature setting stage, changes the temperature units between °C and °F. Control Knob: When rotated quickly, alters the test parameters in large steps, when rotated slowly, alters the test parameters in small increments. Display: A 2-line alphanumeric display shows cup temperature, timer settings, sample size, calibration information, and whether a flash has occurred. An audible warning device is incorporated to prompt the operator to carry out the manual flash test and other actions. The embedded software has three modes of operation:Manual: The temperature of the cup can be set to any value between 10°C (50°F) and 130°C (266°F). The time delay between the cup reaching the set temperature and the audible prompt to carry out the manual flash test (i.e. the time allowed for the sample and vapour to reach equilibrium) can be set between 1 and 30 minutes. Auto: The temperature of the cup can be set to any value between 10°C (50°F) and 130°C (266°F). The time delay between the cup reaching the set temperature and the audible prompt to carry out the manual flash test is automatically set to 1 minute for temperatures up to and including 100°C (212°F)., and 2 minutes for temperatures exceeding 100°C (212°F). The sample size required for the test is also displayed. Ramp: The start temperature of the cup can be set to any value between 10°C (50°F) and 130°C (260°F). The temperature increases at 2°C/min (3.6°F/min) to either 30°C (54°F) above the start temperature or until a flash is detected. During the ramp operation, the increasing temperature is shown on the display. An audible prompt to carry out the flash test is emitted for every degree celsius of temperature rise, up to 100°C (i.e. 86, 87, 88 etc), or every two degrees of temperature rise for temperatures above 100°C (i.e. 102, 104, 106 etc). The manual flash test is carried out by pulling a lever which opens a shutter on the lid and dips the flame from the test jet through the shutter aperture into the vapour space above the sample. An automatic flash detector will sense if the vapour given off by the heated sample has flashed. The flash detector is “tuned” to ignore halo and other localised effects. When the lever is released, the test flame is raised from the aperture, and the shutter will close. A pilot flame will re-light the test jet if it has blown out during the dip sequence. At the end of the test, the display indicates the test temperature and whether a flash was detected. Issue A 10 Jun 2007 8 Pubn No: 33200H2A 2.3. SAFETY FEATURES 2.3.1. OVER-TEMPERATURE CUT-OUTS A thermal cut-out, using temperature data from the sample cup Prt, prevents overheating of the sample cup. An independent over-temperature cut-out is mounted on the heatsink to detect failure of the cooling fan or obstruction to the airflow to the heatsink. 2.3.2. TEMPERATURE WARNING LED A ‘CAUTION HOT' LED is mounted on the top of the tester, which will illuminate when the temperature of the cup/heating block assembly is above 55°C (131°F) and power is connected. 2.3.3. OVER CURRENT CUT-OUT An over-current device is incorporated to protect the peltier module from failure of the control board. 2.3.4. RESETTING THE CUT-OUTS The instrument is reset by switching the power off for a short period, then switching back on again. 2.3.5. INCORRECT VOLTAGE The instrument is powered by an external power supply with a nominal output of 20Vdc. If the voltage applied to the instrument is less than 18Vdc, or more than 22Vdc, the display will indicate that there is a power supply fault, show the voltage that is present, and the peltier drive circuitry will not power up. 9 Issue A 10 Jun 2007 Pubn No: 33200H2A 3. INSTALLATION - GENERAL WARNING: 3.1. BEFORE INSTALLATION, REFER TO THE SAFETY NOTICES ON PAGE 2. UNPACKING The Setaflash Series 3 should be carefully unpacked upon receipt: 1) Retain all packaging for future storage or transport of the instrument. 2) Check the contents against the Packing List. The major items are: a) 33200-2 or 33250-2 Series 3 ‘active cool’ Closed cup Flash Point Tester b) 2ml syringe c) Gas canister and igniter d) Silicone rubber tubing for gas canister to gas jet connection e) Silicone Sample Well ‘O’ Ring Seal for cup/lid (red coloured) f) Viton Sample Well ‘O’ Ring Seal for cup/lid (black coloured) g) Power Supply Unit h) Automatic flash detector probe i) Series 3 Manuals (on CD) j) Quick Start Guide. 3) Check the Setaflash Series 3 visually for damage, particularly if the packaging is damaged in any way. 4) Where applicable, verify that the operating voltage and frequency marked on the power supply unit match the local power supply. 5) Any damage, shortfall, or problems with compatibility to local power supply must be notified to Stanhope-Seta or their agents at the earliest opportunity. Note: 3.2. Each unit is tested for electrical safety is then calibrated. A number of Flash Point tests to verify operation are carried out before despatch. This may result in some discolouration of the sample cup and surrounding area. LOCATION 1) The Setaflash Series 3 should be used in an area of the laboratory that has a stable day to day temperature. 2) Avoid carrying out sub ambient tests in conditions of high humidity. 3) The test area must be draught free yet have adequate ventilation and/or fume extraction. 4) Stand the instrument on a smooth flat surface to allow airflow to the inlet grill in the underside of the instrument. 5) Do not obstruct the air outlet grill at the rear of the instrument. Issue A 10 Jun 2007 10 Pubn No: 33200H2A 3.3. POWER SUPPLY CONNECTIONS 1) Setaflash Series 3 ‘active cool’ operates from a 20Vdc power supply unit. 2) The power supply unit (PSU) can be operated from either a 115Vac or 220Vac mains supply. 3) Connect the PSU mains lead to the mains supply using the following colour convention :BROWN - LINE/LIVE BLUE - NEUTRAL GREEN/YELLOW - EARTH/GROUND 3.4. GAS SUPPLY 3.4.1. GAS CANISTER WARNING THE FOLLOWING SAFETY PROCEDURES MUST BE OBSERVED WHEN HANDLING THE GAS CANISTER : (1) ONLY USE BUTANE GAS (2) REMOVE THE CANISTER FROM THE TESTER WHEN NOT IN USE FOR EXTENDED PERIODS. (3) DO NOT PUNCTURE OR DISPOSE OF THE CANISTER IN A FIRE NOR EXPOSE IT TO HEAT OR HIGH TEMPERATURES. (4) AVOID DIRECT CONTACT WITH ACIDS OR SOLVENTS. 1) The pilot and test gas jets are fuelled by a small rechargeable butane gas canister mounted in a holder on the rear of the Setaflash Series 3. 2) The canister when full contains 11.5 ± 1.0g butane at a pressure of 350kPa (@ 21°C). 3) The flow rate is adjustable between 0 and 20g/hour. 4) A full gas canister should be sufficient to carry out 90 minutes of testing. SILICONE RUBBER TUBE BRASS INSERT ON/OFF GAS VALVE ON DECREASE OFF CONTROL VALVE INCREASE 1 TRANSPARENT SECTION 0 BUTANE GAS CANISTER Figure 3 FILLER VALVE Gas Canister and Related Components 11 Issue A 10 Jun 2007 Pubn No: 33200H2A 3.4.2. GAS CANISTER CHARGING [2] Disconnect Slide the ON/OFF gas valve to the OFF (down) position [1] and disconnect the silicone tubing from the brass insert [2]. [1] Slide Down 1 0 Lift the gas canister from its holder and turn it upside down so that the transparent section is uppermost. 1 0 B U T A N E Charge the canister with butane through the filler valve, in the base of the transparent section, until the liquid level is within a few millimetres of the filler valve. WARNING: ONLY USE BUTANE GAS TO CHARGE THE CANISTER. Turn the canister the correct way round (brass insert uppermost) and re-insert it into the holder. Re-connect the silicone tubing to the brass insert. WARNING: WHENEVER THE CANISTER HAS BEEN RECHARGED, THE PILOT AND TEST FLAMES WILL BE LARGER THAN BEFORE, AND WILL REQUIRE RE-ADJUSTMENT (SECTION 4.2.2. REFERS) Issue A 10 Jun 2007 1 0 12 Pubn No: 33200H2A 4. OPERATION WARNING: 4.1. BEFORE OPERATION, REFER TO THE SAFETY NOTICES ON PAGE 2. SAMPLE PREPARATION WARNING: KEEP CONTAINERS CLOSED WHEN NOT IN USE. DO NOT MAKE A TRANSFER UNLESS THE SAMPLE TEMPERATURE IS AT LEAST 10°C (18°F) BELOW THE EXPECTED FLASH POINT. CAUTION: INCORRECT RESULTS MAY BE OBTAINED IF PRECAUTIONS ARE NOT TAKEN TO AVOID THE LOSS OF VOLATILE MATERIAL FROM THE SAMPLE. 1) Samples should be stored in a clean, leak proof, tightly closed container suitable for use with the sample under test. 2) For best results and safety the sample container should be at least 85-95% full. 4.2. INSTRUMENT PREPARATION 4.2.1. SAMPLE CUP ‘O’ RING CHECK [2] Unlock [1] and open [2] the Sample Cup Lid. [1] Check that the correct ‘O’ Ring Seal is fitted. RED: All samples except Jet A1/ Aviation Fuels and kerosines BLACK: Jet A1/ Aviation Fuels and kerosines only. [4] Wipe the Sample Cup clean, close (3) and lock (4) the Lid. [3] 13 Issue A 10 Jun 2007 Pubn No: 33200H2A 4.2.2. SETTING THE TEST FLAME SIZE Switch the gas supply ON. Slide Up WARNING: IF THE GAS CANISTER HAS JUST BEEN RECHARGED, THE SIZE OF THE PILOT AND TEST FLAMES WILL BE CONSIDERABLY LARGER THAN THE LAST TIME THEY WERE LIT 1 0 Light the Pilot and Test Jets. Adjust the Control Valve on the Gas Cylinder until the Pilot Jet flame is 12mm long. Slide 12mm Note: Gas Adjustment. If there is not sufficient adjustment, centralise the Control Valve, and adjust the Castellated Inner Wheel, then re-adjust the Control Valve. Control Valve Castellated Inner Wheel 4mm Rotate Adjust the Test Jet flame to 4mm diameter by rotating the Pinch Valve. A 4mm circle is engraved on the shutter plate as a guide. Note: Flame Stability. Leave the flame to stabilise for about 30 seconds before final adjustment to flame size. Slide Down Switch the gas supply OFF. 1 0 Issue A 10 Jun 2007 14 Pubn No: 33200H2A 4.2.3. SWITCHING THE POWER ON Switch the instrument ON at the ON/OFF Power Switch on the rear of the instrument 1 0 Switch ON The display will show the software version and power supply voltage….. Version N.NN Vpsu = VV.VV N.NN = software version VV.VV = power supply voltage ….. then change to show the current status. o XX.X C AUTO Yml XX.X = sample cup temperature AUTO = mode Y = sample size 15 Issue A 10 Jun 2007 Pubn No: 33200H2A 4.3. SETTING TEST PARAMETERS 4.3.1. SETTING THE TIMER Press and hold down the Set Timer Button . Press & Hold Down The display will start to count down for a few seconds ….. o XX.X C 59 seconds ….. then a warning beep will sound and the display will change to show “Set Test Time”. SET TEST TIME AUTO Release the Set Timer Button . Release Rotate the Control Knob ….. Rotate ….. to set the time interval in minutes, or to select Auto or Ramp mode. TT = time interval SET TEST TIME TT minutes SET TEST TIME AUTO SET TEST TIME RAMP MODE Note: FAME Products. Maximum time interval = 1 min. Do NOT use Auto or Ramp mode. If the Control Knob is not moved for 4 seconds, the value shown on the display will be saved. Issue A 10 Jun 2007 o XX.X C TT mins 16 o XX.X C AUTO Yml XX.XoC RAMP Pubn No: 33200H2A 4.3.2. SETTING THE TEMPERATURE AND UNITS (°C/°F) Press hold down the Set Temperature Button Press & Hold Down ….. ….. until a warning beep is heard and the display changes to show “Set Temperature” ….. SET TEMPERATURE o XX.X C XX.X = sample cup temperature ….. then release the Set Temperature Button Release . To change between °C and °F Press then release the Set Timer . The temperature Button units will change and the expected flash will default to 20°C / 68°F °C/°F Press & Release Rotate the Control Knob until the expected flash point temperature (start temperature in Ramp mode) is displayed. SET TEMPERATURE 1 1 1o X X .X C X1X1.X1 = expected flash point Rotate If the Control Knob is not moved for 4 seconds, the value shown on the display will be saved. The display will change to show the current temperature of the sample cup. o XX.X C TT mins Note: Sample Size. In Auto mode, the display will show 2ml for expected flash points up to and including 100°C, and 4ml above 100°C. o XX.X C AUTO Yml °C XX.XoC RAMP °C The Sample Cup will start to heat-up / cool-down to the set temperature. 17 Issue A 10 Jun 2007 Pubn No: 33200H2A 4.4. RUNNING A TEST When the Sample Cup has stabilised at the set temperature a warning beep will sound ….. ….. and the display will show “Ready”. XX.XoC Ready TT mins XX.XoC AUTO Yml Ready XX.XoC RAMP Ready Load the Syringe with sample and inject the sample into the Sample Cup through the Filler Orifice. Remove the Syringe. Note: Sample Size: Ambient to 100°C (212°F) = 2ml. Above 100°C (212°F) = 4ml Ramp mode = 2ml only FAME products = 2ml only Do NOT use Auto or Ramp mode for FAME products WARNING: DO NOT INJECT SAMPLE WITH THE PILOT OR TEST FLAME LIT. Press then release the Set Timer Button to start the timer countdown (Manual and Auto modes) or start the temperature rise (Ramp mode). The display will show a countdown (Manual and Auto modes) or the sample cup temperature as it rises (Ramp mode). Issue A 10 Jun 2007 Press & Release o XX.X C TT seconds 18 XX.XoC RAMPING Pubn No: 33200H2A Slide Up Switch the gas supply ON. 1 0 Light the Pilot and Test Jets. Check the Test Jet flame is 4mm diameter. A 4mm circle is engraved on the shutter plate as a guide. Adjust if necessary by turning the Pinch Valve. When the countdown reaches 0 seconds (Manual or Auto mode) or the test temperature (Ramp mode)….. 4mm Rotate XX.XoC RAMPING XX.XoC 0 seconds ….. a warning beep will sound. 19 Issue A 10 Jun 2007 Pubn No: 33200H2A Open and close the Shutter over a period of 2.5 seconds 4.5. RESULTS Note: ‘Halo’ Effect: A blue halo or enlarged flame sometimes occurs when the temperature of the sample is close to the flash point temperature. These effects are not a flash, and are not detected by the flash detector. 4.5.1. 2.5 Seconds Note: ‘Popping’: A "popping" sound may be heard when the flame is dipped into the vapour space. If a flash is not detected, it infers that the test temperature is about 1°C below the flash point temperature. FLASH If a flash is detected ….. ….. the second line of the display will show “FLASH”. XX.XoC FLASH TT mins Record the temperature and result. Note: Specification Tests: Compensation must be made for barometric pressure - See the appropriate Test Method. Issue A 10 Jun 2007 20 XX.XoC AUTO Yml FLASH XX.XoC FLASH Pubn No: 33200H2A 4.5.2. NO FLASH If a flash is NOT detected ….. ….. the second line of the display will be blank “FLASH” (Manual and Auto mode) or will show “RAMPING” (Ramp mode). XX.XoC TT mins XX.XoC AUTO Yml XX.XoC RAMPING Ramp mode only: When the sample cup temperature has ramped up to the next test temperature (every 1°C up to 100°C and every 2°C above 100°C) a warning beep will sound. Open and close the Shutter over a period of 2.5 seconds ….. ….. If no flash occurs, the temperature ramp/warning beep cycle will continue until a flash is detected or the temperature reaches 40°C above the start temperature 2.5 Seconds XX.XoC NO FLASH XX.XoC FLASH Record the temperature and result. 21 Issue A 10 Jun 2007 Pubn No: 33200H2A 4.6. END OF TEST Slide Down Switch the gas supply OFF and wait until the test and pilot flames are extinguished. 1 0 Press then release the Set Temperature Button the Flash Detector and temperature display. to reset Press & Release Unlock and open the Lid, remove used sample, and clean the Sample Cup. Switch the instrument OFF at the ON/OFF Power Switch on the rear of the instrument Switch OFF 1 0 Issue A 10 Jun 2007 22 Pubn No: 33200H2A 5. CALIBRATION 5.1. DESCRIPTION The Calibration Mode is only accessible from power up. The Setaflash Series 3 Flash Point Testers are calibrated for temperature using a single point method. The procedure is carried out via the panel controls and requires a reference thermometer and some thermo-conductive paste. The Setaflash Series 3 is provided with an aperture at the right hand side of the cup/heating block assembly for insertion of the reference thermometer, allowing accurate verification and calibration of the cup/heating block assembly temperature. Calibration is in °C, the native unit of temperature of the instrument (ie all calculations ramp rates and measurements are in degrees Celsius. A conversion formula is then applied to display in degrees Fahrenheit). 5.2. SCHEDULE 1) The temperature measurement/control should be calibrated at 6 monthly intervals. 5.3. PROCEDURE Insert a small amount of thermoconductive paste into the Thermometer Aperture. Insert a 0 - 110°C calibrated reference thermometer (Seta 13751-0 recommended) as far into the Thermometer Aperture as it will go. Press hold down the Set and Set Timer Temperature Buttons and ….. Press & Hold Down 23 Issue A 10 Jun 2007 Pubn No: 33200H2A ….. switch the Setaflash Series 3 ON at the ON/OFF Power Switch on the rear of the instrument. 1 0 Switch ON The display will show the software version ….. Version N.NN N.NN = software version ….. then change to show the current status. Calibrate Mode Please wait … Release the Set Temperature and Set Timer Buttons. Release °C The Sample Cup will start to heat up to 55°C as measured by the Setaflash Series 3 Flash Point Tester. When the instrument measures the Sample Cup temperature as 55°C the display will countdown from 300 seconds while the temperature stabilises. Issue A 10 Jun 2007 Calibrate Mode Please wait 300 24 55°C Pubn No: 33200H2A When the countdown reaches 0 a warning beep will sound ….. ….. and the display will change to request the temperature as shown on the thermometer. Thermometer T? > 55.0°C Wait until the temperature shown on the thermometer is stable. This may take a few more minutes. XX.X°C Rotate the control knob clockwise or anti clockwise until the temperature as measured by the thermometer is shown in the second line of the display. One "click" of the knob will change the temperature of the cup/heating block assembly by approximately 0.1°C Thermometer T? > XX.X°C Rotate Press then release the Set Timer Button ….. Press & Release SWITCH OFF ….. and the display will change to show ‘SWITCH OFF’.. 25 Issue A 10 Jun 2007 Pubn No: 33200H2A Switch the instrument OFF at the ON/OFF Power Switch on the rear of the instrument. The calibration is stored. Switch OFF 1 0 5.4. CALIBRATION CHECK Press hold down the Set and Set Timer Temperature Buttons and ….. Press & Hold Down ….. switch the Setaflash Series 3 ON at the ON/OFF Power Switch on the rear of the instrument. 1 0 Switch ON The display will show the software version ….. Version N.NN N.NN = software version ….. then change to show the current status. Issue A 10 Jun 2007 Calibrate Mode Please wait … 26 Pubn No: 33200H2A Release the Set Temperature and Set Timer Buttons. Release °C The Sample Cup will start to heat up to 55°C as measured by the Setaflash Series 3 Flash Point Tester. When the instrument measures the Sample Cup temperature as 55°C the display will countdown from 300 seconds while the temperature stabilises. 55°C Calibrate Mode Please wait 300 When the countdown reaches 0 a warning beep will sound ….. ….. and the display will change to request the temperature as shown on the thermometer. Thermometer T? > 55.0°C 27 Issue A 10 Jun 2007 Pubn No: 33200H2A Wait until the temperature shown on the thermometer is stable. This may take a few more minutes. 54.9°C If the thermometer shows 54.9 to 55.1°C the calibration is correct. Otherwise repeat the calibration procedure. Switch the instrument OFF at the ON/OFF Power Switch on the rear of the instrument. The calibration is stored. 55.1°C Switch OFF 1 0 Remove and clean the Thermometer. Issue A 10 Jun 2007 28 Pubn No: 33200H2A 6. VERIFICATION 1) It is recommended that flash point instruments are checked for operation on a regular basis. In addition, the latest versions of IP, ASTM and ISO methods will make the yearly testing of instruments using Certified Reference Materials (CRM) mandatory. More regular tests will utilise Secondary Working Standards (SWS). Note: Stanhope-Seta recommends using Setaflash Certified Flash Point Material, part number Seta 99878-3. 2) Secondary Working Standards may be generated by the company carrying out the tests. The procedure for making SWS is included in the standard method of test. 3) Validation requires that the measured flash point is within 0.7R of the certified value of the CRM, where R is the reproducibility of the Test Method. 4) The following table gives guidance on materials and their flash points in closed cup testers: Substance n-Octane o-xylene n-Nonane n-Decane n-Undecane n-Dodecane Note: Approximate Flash Point °C 15 32 31 46 66 71 The certified flash point supplied with a CRM will be method-specific. methods will have a different certified flash point for a similar fluid. 29 Different test Issue A 10 Jun 2007 Pubn No: 33200H2A 7. MAINTENANCE CAUTION: DO NOT LUBRICATE THE DIPPING MECHANISM. CAUTION: DO NOT LUBRICATE THE SHUTTER. CAUTION: TAKE CARE WHEN CLEANING THE LID OR SHUTTER NOT TO DAMAGE THE TIP OF THE FLASH DETECTOR PROBE. 1) After each test: a) Wipe the Sample Cup clean. b) Wipe the Lid and Shutter clean. 2) After each test session: a) Carry out the actions detailed in 1) above. b) Wipe the exterior of the Instrument clean of spillages, splashes and residues. 3) Every six months: a) Carry out the actions detailed in 2) above. b) Thouroughly clean the Lid and Sample Cup with a solvent soaked rag, and allow to air dry. 4) Every 12 months: a) Carry out the actions detailed in 3) above. b) Check the power supply and leads for any signs of wear or damage. c) Check the general condition of all wiring and cable assemblies. d) Check all subassemblies are securely attached to the instrument chassis. e) Ensure that all screw connections are tight. f) Check the earth bonding and insulation resistance. g) Check the illuminated display. h) Check that the shutter operates smoothly: Do not lubricate the shutter slide. i) Check that when the shutter aperture is fully open, the test jet is dipped to the correct depth, i.e. the centre of the test jet intersects the plane of the underside of the cover. When the shutter is released all apertures should be closed. j) Inspect the sample cup O-ring seal regularly by checking that it is smooth. Lightly smear it with light oil and close the lid. Re-open the lid and check that the oil trace from the O-ring is continuous on the underside of the lid. Check that the lid is flat and that the hinge is not strained. Remove all traces of the oil from the lid, seal and cup. CAUTION: CHECK THAT THE APPROPRIATE SAMPLE WELL ‘O’ RING SEAL IS FITTED:THE RED SILICONE 'O' RING (SETA 13770-004) MUST BE USED FOR ALL SAMPLES EXCEPT JET A1/AVIATION FUELS AND KEROSINES. THE BLACK VITON 'O' RING (SETA 13740-004) MUST ONLY BE USED FOR JET A1/AVIATION FUELS AND KEROSINES. k) Check that the flash detector probe does not foul the shutter or protrude below the lower edge of the lid. l) Check the sample cup, lid and shutter for cleanliness. Issue A 10 Jun 2007 30 Pubn No: 33200H2A 8. FAULT FINDING FAULT Erroneous temperature display or other visible operating fault POSSIBLE CAUSE Random program error USER REMEDY Try switching off unit for 5 seconds and switching back on again No illumination on panel display when power is switched on No power to the Tester Check that the power supply is connected and switched on LED on panel remains off when cup temperature exceeds 55°C LED failed Return to factory for repair Circuit board failed Return to factory for repair Safety cut-outs have tripped Switch off for 60 seconds then switch back on circuit board failed Gas flow rate erratic Return to factory for repair Adjust control valve on gas canister Unable to adjust flame size sufficiently Adjust inner castellated wheel on gas canister, then re-adjust control valve Gas leaking from tube Inspect silicone rubber tubing and replace if necessary Gas canister low or empty (flame very small) Refill gas canister Sample contaminated Check sample for contamination and clean sample cup, filler orifice, lid and shutter where appropriate Test flame incorrect size Check that test jet is set correctly (compare with flame size mark engraved on top of cup/heating block assembly/shutter) Poor sample preparation Prepare fresh sample Vapour leakage Inspect lid and shutter for slide wear Cup/heating block assembly fails to heat/cool Difficult to light gas supply Flash point value too low Flash point value too high Check condition of O-ring seal and replace if necessary Gas supply fails to turn off Flash detector probe does not detect a flash Display shows message 'O/C' Test flame incorrect size Check that test jet is set correctly (compare with flame size mark engraved on top of cup/heating block assembly/shutter) On/off gas valve obstructed Replace gas canister assembly On/off gas valve broken Replace gas canister assembly Halo effect and/or “popping” Close to flash point but NOT a true flash. Repeat test at slightly higher temperature Probe incorrectly positioned Centralise probe in square cut-out in lid Faulty probe Replace probe Faulty circuit board Return to factory for repair Probe not plugged into socket at rear Plug in probe Faulty probe Replace probe Display shows psu fault message and/or a Incorrect or faulty power supply unit PSU voltage NOT between 18 and 22V connected Use correct power supply unit (20Vdc) Unable to calibrate, temperature unstable Faulty circuit board Return to factory for repair Faulty heater Return to factory for repair 31 Issue A 10 Jun 2007 Pubn No: 33200H2A 9. REPAIR 1) If the instrument is to be returned to our factory for repair, ensure that it is adequately packed for the intended method of transport. Inadequate packing may cause returned instruments to be damaged in transit, resulting in additional cost and time to rectify. Please contact our Repairs Administration for any help or advice you may need. 2) In all correspondence concerning the instrument the full serial number and electrical supply information should be quoted (shown on the identification plate on the rear of the instrument). 9.1. Note: REPLACING A FLASH DETECTOR PROBE The flash detector has a high degree of immunity to short pulses of electromagnetic interference. Extremely high and/or prolonged electromagnetic radiation close to the instrument may cause the flash detector to trigger. 1) Disconnect the flash detector probe lead from the socket on the back of the instrument. 2) Loosen the retaining nut and clip. 3) Slide the flash detector from the cup/heating block assembly. 4) Insert a new flash detector probe in the top of the cup/heating block assembly. 5) Position the tip of the flash detector centrally in the square cut-out in the lid. 6) Position the retaining clip over the flash detector and tighten the retaining nut firmly. 7) Connect the lead into the socket at the rear of the Tester. SQUARE CUT-OUT Figure 4 9.2. Flash Detector Probe Replacement REPLACING THE "O" RING SEAL CAUTION: CHECK THAT THE APPROPRIATE SAMPLE WELL ‘O’ RING SEAL IS FITTED:THE RED SILICONE 'O' RING (SETA 13770-004) MUST BE USED FOR ALL SAMPLES EXCEPT JET A1/AVIATION FUELS AND KEROSINES. THE BLACK VITON 'O' RING (SETA 13740-004) MUST ONLY BE USED FOR JET A1/AVIATION FUELS AND KEROSINES. DO NOT USE VITON ‘O’ RINGS FOR TEMPERATURES ABOVE 110°C 1) Open the lid. 2) Thoroughly clean the sample cup and lid. 3) Using a fine pointed instrument, pick the old "O" ring from the groove around the sample cup. 4) Clean any residue from the groove. 5) Insert the new "O" ring into the groove. 6) Close and lock the lid. Issue A 10 Jun 2007 32 Pubn No: 33200H2A ‘O’ Ring Seal Figure 5 9.3. Sample Well 'O' Ring Seal Replacement REPLACING THE GAS CANISTER AND TUBING 1) Check that the on/off gas valve is in the off (down) position. 2) Pull the silicone rubber tubing from the brass fitting on the top of the gas canister and the lid shutter assembly. 3) Remove the gas canister by lifting it out of the holder on the rear of the Tester. 4) Invert the replacement gas canister so that the transparent section is uppermost. 5) Charge the canister with butane through the filler valve, situated in the base of the transparent section, until the liquid level is within a few millimetres of the filler valve. 6) Check that the brass insert in the top of the canister is screwed in fully. 7) Insert the filled gas canister into the holder with the brass insert to the top. 8) Re-connect the silicon rubber tubing to the brass insert (push fit). 9) Re-connect the silicone rubber tubing to the lid/shutter assembly (push fit). SILICONE RUBBER TUBE BRASS INSERT ON/OFF GAS VALVE ON DECREASE OFF CONTROL VALVE INCREASE 1 TRANSPARENT SECTION 0 BUTANE GAS CANISTER Figure 6 FILLER VALVE Gas Canister Replacement 33 Issue A 10 Jun 2007 Pubn No: 33200H2A 9.4. REPLACING THE LID/SHUTTER ASSEMBLY 1) Disconnect the silicone rubber tubing that connects the gas canister to the lid/shutter assembly at the lid/shutter assembly. 2) Remove the flash detector; a) Disconnect the flash detector probe lead from the socket on the back of the instrument. b) Loosen the flash detector retaining nut and clip. c) Slide the flash detector from the cup/heating block assembly. 3) Unlock the lid. 4) Loosen the hexagon socket head screw that attaches the lid/shutter assembly to the hinge pin (2mm hex head key supplied). 5) Open the lid/shutter assembly and slide it to the left, off the hinge pin. 6) Slide the new lid/shutter assembly onto the hinge pin. 7) Close the lid/shutter assembly. 8) Tighten the hexagon socket head screw to secure the lid/shutter assembly to the hinge pin. 9) Check that the lid/shutter assembly compresses the ‘O’ Ring Seal all round. If necessary loosen the two lid screws and adjust the lid/shutter assembly position, then re-tighten the lid screws. 10) Check that the lid opens, closes, and latches smoothly. 11) Re-fit the flash detector; a) Insert the flash detector probe in the top of the cup/heating block assembly. b) Position the retaining clip over the flash detector and tighten the retaining nut firmly. c) Connect the lead into the socket at the rear of the Tester. 12) Connect the silicone rubber tubing to the lid/shutter assembly (push fit). Lid/Shutter Assembly Hexagonal Socket Head Screw Hinge Pin Lid Screws Figure 7 Issue A 10 Jun 2007 Lid/Shutter Assembly Replacement 34 Pubn No: 33200H2A 10. SPECIFICATION Flash point temperature range: 10 to 130°C (50 to 266°F) @ 20°C Ambient Unit of Temperature: User selectable °C, °F Sample size: 2ml for flash points up to 100°C (212°F) 4ml for flash points above 100°C (212°F) 2ml for FAME products at all temperatures. Test time: 1 minute for flash points up to 100°C (212°F) 2 minutes for flash points above 100°C (212°F) 1 minute for FAME products at all temperatures Timing: Integral timer for standard 1 and 2 minute tests, and up to 30 minutes Audible and visual indication Temperature Ramp Rate: 2°C/minute Temperature Ramp Range: 40°C above the start temperature Temperature measurement: 0.5°C resolution (calibrated platinum resistance thermometer) 0.5°C accuracy Flash detection: Automatic Sample Cup material Aluminium (Model 33200-2) Stainless Steel (Model 33250-2) Operational ambient temperature range: 5 - 40°C Supply voltage: 20Vdc via external power supply (supplied) requiring 100 to 250V 50/60Hz mains input. Power consumption: 80W Dimensions (H x W x D): 260 x 280 x 260mm Weight: 5kg 35 Issue A 10 Jun 2007 Pubn No: 33200H2A 11. ACCESSORIES Part No. Description 13666-0 BUTANE REFILL CONTAINER, pack of 10. 13746-0 SETAFLASH DRAUGHT SCREEN 13747-0 SOLID SAMPLE DISPENSER 13751-0 REFERENCE THERMOMETER, 0-110°C, with NAMAS calibration certificate. 13770-311 SYRINGE, 4ml, for tests above 100°C. 13775-0 REFERENCE THERMOMETER, 100-300°C, with NAMAS calibration certificate. 26000-0 SAMPLE REMOVAL KIT, with pump and trap. To extract and collect hot sample from the cup. 30006-0 CARRYING CASE, 315mm x 400mm x 300mm). 30007-0 TOWN/LABORATORY GAS ADAPTOR, converts Series 3 Setaflash from gas cylinder to piped supply operation . 99878-3 SETAFLASH CERTIFIED FLASH POINT REFERENCE MATERIAL, 50ml. 99928-0 SETATHERM, digital thermometer, -20 to 150°C, with Works calibration certificate. 13747-0 26000-0 30006-0 Issue A 10 Jun 2007 36 Pubn No: 33200H2A 12. SPARES 12.1. SPARES AVAILABLE Part No. Description 13666-0 BUTANE REFILL CONTAINER, pack of 10 13730-005 SILICONE RUBBER TUBING, 4 metres 13740-004 SAMPLE WELL ‘O’ RING SEAL, VITON, for kerosene based applications, pack of 5 13470-009 SYRINGE, 2ml 13740-425 FLASH DETECTOR ASSEMBLY 13770-004 SAMPLE WELL ‘O’ RING SEAL, SILICONE, pack of 5 13770-311 SYRINGE, 4ml 30000-002 GAS CANISTER 70000-001 LID AND SHUTTER ASSEMBLY 12.2. SUGGESTED SPARES FOR 2 YEARS (2000 TESTS) Part No. Description Qty 13666-0 BUTANE REFILL CONTAINER, pack of 10 1 Pack 13730-005 SILICONE RUBBER TUBING, 4 metres 2 13740-004 SAMPLE WELL ‘O’ RING SEAL, VITON, pack of 5 2 Packs 13470-009 SYRINGE, 2ml 1 13740-425 FLASH DETECTOR ASSEMBLY 1 13770-004 SAMPLE WELL ‘O’ RING SEAL, SILICONE, pack of 5 4 Packs 13770-311 SYRINGE, 4ml 1 37 Issue A 10 Jun 2007 Pubn No: 33200H2A 13. FREQUENTLY ASKED QUESTIONS The following brief list may assist in answering some basic questions that may arise when using the Setaflash Flash Point Testers. 1) What should I do if there is a power failure during a test? Repeat the test using a new sample 2) What happens if the HOT indicator lights up? This shows that the cup temperature exceeds 55°C 3) What should I do if a result on a Certified Reference Material (CRM) is outside the permitted tolerance band? Check (as applicable) the cleanliness of the cup and lid/shutter assembly, and the condition of the O-ring. Check also the operation of the flash detector and verify the cup temperature 4) How do I verify the correct operation of the instrument? Run a test using a certified flash point reference material 5) What should I do if the shutter assembly sticks? Clean the shutter with a suitable solvent. Remove all traces of the solvent 6) Should I use this equipment in a fume cupboard? Yes, it is advisable if there are likely to be any hazardous fumes, but the fume cupboard should be free of excessive draughts 7) Which model should I use for Jet A1 and Aviation Fuels? Models 30000-0, 33000-0, or 33200-2 8) Which model should I use for corrosive samples? Model 32000-0 9) Which closed cup model should I use for tests at close to ambient temperature? Model 33200-2 because it has a peltier cell cooling system built in. 10) Where can I obtain CRMs? These are available from Stanhope-Seta 11) Should I turn the instrument off at the end of a day's use? Yes, it is recommended when the equipment is not being used for an extended period 12) Is the instrument made of flame-retardant materials? Yes 13) How do I know when the gas canister needs refilling? When the test flame size cannot be set correctly or there is no liquid visible in the transparent part of the gas canister 14) How many tests can I do with a full gas canister ? Approximately 90 one-minute tests Issue A 10 Jun 2007 38 Pubn No: 33200H2A APPENDIX A: SETA SOLIDS DISPENSER 13747-0 1) Fit the knurled base into the Setaflash cup. 2) Generously load the sample into the dispenser. 3) Level off the sample. 4) Fit the dispenser into the knurled base. 5) Whilst holding the knob, rotate the knurled base. 39 Issue A 10 Jun 2007 Pubn No: 33200H2A 6) Remove the dispenser and base. This dispenses a 2ml sample. 7) To dispense a 4ml sample, remove the spacer ring as shown and carry out steps (1) to (6) above. Issue A 10 Jun 2007 40