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Air Server user manual

1. Air Server amp Multi Channel Samplers MCSO6 amp MCSO8 Operators Manual AuGcust 2006 QUI 0004 VERSION 6 1 MARKES international ional Ltd T 44 0 1443 230935 F 44 0 1443 231531 E enquiries markes com WIOD SOoyIePUW MMM Air Server MCS User Manual Markes International This page left intentionally blank QUI 0004 V6 1 Aug 06 Z z 3 pi p 7 Oo e 3 Markes International Ltd T 44 0 1443 230935 F 44 0 1443 231531 E enquiries markes com Air Server MCS User Manual Markes International Table of Contents 1 0 Introduction to the Air Server Accessory for UNITY 7 1 1 Summary of Operation 7 2 0 Installation of the Air Server accessory onto UNITY 10 2 1 Unpacking procedure 10 2 2 Packing list for Air Server U AIRSV 10 3 0 Installation 11 3 1 Tools required 12 3 2 Pneumatic connections 12 3 2 1 Installation of PEEK link tube assembly 12 3 2 2 Connection of the Mass Flow Controller 14 3 2 3 Connecting UNITY e to Air Server Link tube SERASU 5021 when no dryer is fitted 15 3 2 4 Requirement for sample pump U ASPMP1 U ASPMP2 16 3 2 5 Sample line connection 17 3 3 Electrical and PC connections 17 3 4 Configuring the pump optional 17 3 5 Configuring the dryer optional 17 3 6 Installing the UNITY e to Air Server Link tube in UNITY e 19 3 7 Loading system software 20 3 8 Disconnecting Air Server in order to run tube based methods 22 z z 3 e
2. C UlbATD Manual Ultr Load Unload T emperatres LoadT emp UnLoadT emp Blank Tubes Sampling Ultr 3e collection Ultr v AitServer Channels External Valve Pi t Number Of Channels 3 l x Bee ia ee FM Use Unity with Flow Control Module 7 Operate Direct Mode with HP7694 OK Figure 21 Configuration for Air Server methods This tube will be permanently loaded within ULTRA to complete the flow path while operating Air Server methods 6 2 2 Pneumatics set up Figure 20 shows how the UNITY pneumatics should be configured i e just as if UNITY were connected directly to an Air Server as in section 3 2 figure 4 above Figure 22 UNITY pneumatics connections for running Air Server methods 6 3 Running ULTRA methods QUI 0004 V6 1 2 a Aug 06 37 Markes International Ltd T 44 0 1443 230935 F 44 0 1443 231531 E enquiries markes com z z 3 Q t O 3 Air Server MCS User Manual Markes International 6 3 1 Configuration changes The configuration should be changed via the Options menu Select Options on the software menu select the Configurations tab and set up as shown in figure 23 Options Methods Gas Sequence Ports Configuration Reporting Miscellaneous Automation Samping Ce RR collection AiServer and Ultr AirServer Autosecure 2nd UltATD UltATD 50 50 Same UltrATD Manual Manua
3. QUI 0004 V6 1 E Aug 06 28 Markes International Ltd T 44 0 1443 230935 F 44 0 1443 231531 E enquiries markes com z z 3 pi o 7 oO e 3 Air Server MCS User Manual Markes International Sequences are made up of sets with each set being a series of analyses When a set is first created it is a rapid and convenient tool for associating a defined number of analyses with a specific method and sample channel However once created sets may be modified to contain any combination of methods and or sample channels Sequences containing complex sets may be saved for use at a later date Sequences and sets are created and or amended via the Automation Window which appears by default in Air Server mode see figure 9 When the software is set up to run in Air Server mode for the first time a default sequence with one set of ten runs is created Right clicking with the mouse anywhere within the Sequence Builder section of the Automation Window will bring up the contextual menu for the sequence builder figure 14 Note These options can also be accessed by selecting the Automation menu via the main tool bar c Program Files Unity methods Example seq Controlling Sequence I Recycle Sequence Builder Sequence Viewer Sequence Reporter ne Lan hE nn E A A E a Taefu T immeciate New Sequence Open Sequence Add Sequence Add OLA Set dd OLA Sample Delete Item Figure 14 Right clicking withi
4. 8 1 8 union a 1 87 T a hw Vd ord ay T 1 16 PEEK tubing fed to rear of UNITY e through conduit here 5 as i am J Fh Figure 4 Air Server connections to the front of UNITY e It is not necessary to cut the long length of PEEK tubing just pass it QUI 0004 V6 1 T Aug 06 13 Markes International Ltd T 44 0 1443 230935 F 44 0 1443 231531 E enquiries markes com Z 3 ei oO A el 3 Air Server MCS User Manual Markes International through the bulkhead as shown in Figure 3 as this will later be attached to the inlet of the MFC e Connect the 1 8 brass T to the copper tube of the split flow vent and the 1 8 1 8 union to the copper tube of the desorb flow vent Figure 4 Note Hold the desorb pneumatics assembly firmly in position during installation of the union onto the desorb flow vent to avoid placing any strain on the cold trap link If in any doubt about this disconnect the pneumatic assembly from the cold trap see UNITY e Operators manual Section 4 2 before attaching the union Ensure all connections are firm but not over tightened The completed installation of the PEEK link tube assembly to the UNITY e pneumatics is illustrated in Figure 4 e In order to minimise risk of moving the desorb pneumatics chassis and thus placing undue strain on the cold trap link it is recommended that the PEEK link tube assembly be left connected
5. version 2 2 0 or earlier the Pump On check box has no function For Air Server systems with serial number GBO0 A 1xxxx using software version 2 2 0 or earlier the Pump On check box will switch the Air Server pump on or off assuming the appropriate option is selected It is strongly recommended that the box is left checked i e Pump On at all times Note Selection of or Dryer On for humid samples by checking the appropriate box will only be effective if the appropriate option has been installed 4 2 Setting the carrier gas type e Under the View menu select Options and then Gas e Access the carrier gas selection by clicking on the box with the small arrow to the right of the gas type e The three carrier gas options He H3 and N will then be displayed e Click on the desired gas and then click on the OK button to select and set the carrier gas type 4 3 Parameters for on line mode methods QUI 0004 V6 1 2 z Aug 06 24 z z J pi p Mf e e 3 Markes International Ltd T 44 0 1443 230935 F 44 0 1443 231531 E enquiries markes com Air Server MCS User Manual Markes International All on line method parameters except Sample Gas and Sample Channel are accessed and changed in the same way as tube desorption method parameters in other method modes see Section 22 of the main UNITY operators manual This section of the manual only covers those paramete
6. Minimising analytical interference from water during the analysis of sorbent tubes If the dryer is required see above refer to figures 7 and 8 e attach the mounting bracket of the dryer to the back panel of the Air Server using the two screws and washers provided QUI 0004 V6 1 z a Aug 06 17 Markes International Ltd T 44 0 1443 230935 F 44 0 1443 231531 E enquiries markes com z z 3 pi o 7 oO e 3 Air Server MCS User Manual Markes International e Orientate the dryer such that the knob of the needle valve is pointing upwards e Plug in the circular electrical fitting to the circular socket labeled DRYER on the Air Server back panel needle valve orientated upwards Sample out port on dryer Dryer exhaust lectrical itting m v_p i a Figure 7 Mounting bracket attached to the back panel of the Air Server QUI 0004 V6 1 z Aug 06 18 Markes International Ltd T 44 0 1443 230935 F 44 0 1443 231531 E enquiries markes com Z z 3 pi p 7 Oo e 3 Air Server MCS User Manual Markes International Figure 8 Mounting bracket attached to the back panel of the Air Server opposite view e The dryer requires a pressure regulated supply 15 psi of around 200 ml min dry air or nitrogen e The dry gas supply should be connected in to the dryer as shown in figure 8 using the 1 8 copper tubing provided e The dry air or nitrogen exha
7. alignment tool inside the cold trap box Having checked all of the above switch both UNITY e and the Air Server on using the switch located on the back panel of each instrument 3 7 4 Downloading the operating software to UNITY Air Server Download the software to UNITY e as described in Section 6 2 of the main UNITY e user manual Once this download is complete the UNITY LED will turn green while that of the Air Server will remain red The software displayed on the PC at that point is for a standalone manual version of UNITY only Use the mouse to click on the View menu of the software click on Options and then select the Configurations tab In the sampling options check the Air Server box see Section 16 of the main UNITY e operators manual A Change of System Configuration warning message will be displayed click OK a Configurations Options dialogue box then appears click OK Now select the Ports tab and select the correct Com port for the Air Server MCS if known The default port is Com2 Click OK on the Options page a Software is shutting down message will be displayed telling you that the software is closing in order to effect the changes just made Recycle the power on the Air Server and then restart the UNITY e software by double clicking on the UNITY e icon on the Desk top Wait as the software is downloaded to the Air Server unit Note that
8. as described in the ULTRA Operators Manual The Air Server should then be connected to the UltrA as shown in figures 19 and 20 This hardware configuration can be set up permanently and then depending on whether you wish to run ULTRA or Air Server methods the configuration pneumatics can be changed as appropriate see below Figure 19 Air Server connections to ULTRA see also ULTRA Operators Manual QUI 0004 V6 1 3 Aug 06 35 Markes International Ltd T 44 0 1443 230935 F 44 0 1443 231531 E enquiries markes com z z 3 Q t Q O 3 Air Server MCS User Manual Markes International Purge In from ULTRA Sample Out to ULTRA Figure 20 ULTRA to Air Server connections 6 2 Running Air Server Methods 6 2 1 Configuration changes The configuration should be changed via the Options menu Select Options on the software menu and then select the Configurations tab Select the blank tube position as shown in figure 21 the default is position 1 and then place an empty tube in this position in the ULTRA trays z z 3 Q t O 3 QUI 0004 V6 1 Aug 06 36 Markes International Ltd T 44 0 1443 230935 F 44 0 1443 231531 E enquiries markes com Air Server MCS User Manual Markes International Options Methods Gas Sequence Ports Configuration Reporting Miscellaneous Automation Sampling C AjServer and Ultr AiServer C UlbATD Manual
9. from the PC the new software should be installed from the CD as described in Section 6 1 of the main UNITY operators manual 3 7 3 Switching on Ensure that the UNITY e installation as described in Section 4 of the main UNITY QUI 0004 V6 1 2 Aug 06 20 Markes International Ltd T 44 0 1443 230935 F 44 0 1443 231531 E enquiries markes com z z 3 pi p 7 e e 3 Air Server MCS User Manual Markes International operators manual and the Air Server installation as described above have both been completed in full before switching on either instrument Also ensure that the gas supplies to the system especially the dry air or nitrogen used for UNITY e valve actuation and purging the cold trap box are on Note As with any UNITY e installation switching on UNITY e without a supply of dry gas to purge the cold trap box will lead to icing of the Peltier cell and possible damage to UNITY e It is for this reason that UNITY e has a built in sensor that will detect the lack of dry gas and stop the trap from heating If a run is initiated under such circumstances the UNITY e status bar see Section 14 3 of the main UNITY operators manual will read EQUILIBRATING and the trap will not reach its trap low temperature The user should then switch on the dry gas supply and restart the run Ensure that the PC is switched on Note UNITY e must never be switched on with the stainless steel trap
10. injection of this sample this will stop the sequence after it has finished sampling and injected the sample row that is currently running e Stop after all injections of this sample this will stop the sequence after it has finished all of the sampling steps and injections defined in the current sample row e Stop at the end of this set will stop when the current set has completed e Stop at the end of this cycle will complete all the sets in a sequence and then stop this is useful for interrupting a sequence when cycle indefinitely has been chosen QUI 0004 V6 1 2 z Aug 06 34 z z 3 pi o 7 oO e 3 Markes International Ltd T 44 0 1443 230935 F 44 0 1443 231531 E enquiries markes com Air Server MCS User Manual Markes International e Stop immediate this will stop the UNITY Air Server immediately even if it is half way through a sampling step using stop immediate could mean that the cold trap is loaded with sample when you come to start the next sequence 6 0 Using the Air Server with an ULTRA UNITY system A UNITY thermal desorber may be installed with both an on line Air Server and a 100 tube ULTRA autosampler See ULTRA Operators Manual QUI 0006 Note although both autosamplers are connected to the UNITY they cannot both be operated in the same sequence 6 1 Installation of the ULTRA UNITY Air Server system The system should be installed by first completing an ULTRA UNITY installation
11. or liquid samples are weighed for direct desorption The Air Server accessory connects to UNITY Figure 1 and extends the compatible sample range to include whole air gas samples e g continuous monitoring of air gas streams or samples collected in whole air containers such as canisters or Tedlar bags Tubes can still be desorbed using a UNITY configured with the Air Server accessory Figure 1 UNITY Air Server The Air Server contains an electronic mass flow controller appropriate inert switching valves and link tubing to interface the accessory to UNITY The Air Server is controlled via an extended version of UNITY software It features selection between three inlet ports as standard using inert PTFE body solenoids and is compatible with gas phase samples ranging in pressure from sub atmospheric to 50 psig The three ports are commonly used for sample calibrant and zero gas streams but could just as easily be used for three different samples QUI 0004 V6 1 27s Aug 06 Markes International Ltd T 44 0 1443 230935 F 44 0 1443 231531 E enquiries markes com z z 3 Q t O 3 Air Server MCS User Manual Markes International 1 1 Summary of Operation The gas stream selected is directed out of the Air Server accessory via the dryer if one is fitted and into the UNITY cold trap via the Link tube During this sampling phase UNITY s cold trap is electrically cooled and volatiles from ac
12. sample The cycle time should equal the sum of times of all the different phases of analyser operation for example GC run time cool down and equilibration In the case of on line mode operation UNITY e software uses the cycle time parameter to calculate when collection of the next sample can begin such that the cold trap QUI 0004 V6 1 E z Aug 06 27 z z 3 ei o 7 e 3 Markes International Ltd T 44 0 1443 230935 F 44 0 1443 231531 E enquiries markes com Air Server MCS User Manual Markes International will be ready to desorb just after the analyser is ready for the next injection Note If sampling delays and intervals are set in the Automation Window then the GC cycle time should be set to 0 1 minutes to avoid any interference with automated sampling times Further Notes e Splitting is not available during the on line sampling phase e As with tube desorption methods the status of the flow path in on line mode can be displayed schematically on the PC screen at all times This facility is accessed as described in Section 18 of the main UNITY e users manual e As in the case of tube desorption carrier gas is continually supplied to the GC or other analyser during standby and throughout all the pre trap desorption processes Carrier gas is supplied to the transfer line s connecting UNITY e to the analyser s via the desorber s carrier by pass line As with conventional UNITY e installatio
13. the Air Server LED will turn amber while the download is in progress and will turn green when it is complete If any problems are encountered when communicating with the Air Server a Dialogue box containing the message OLA unit not detected will appear Under such circumstances the user should check that the correct serial port has been selected by selecting the option select serial port from the Dialogue box and changing the port in the drop down list which appears QUI 0004 V6 1 z z Aug 06 21 Markes International Ltd T 44 0 1443 230935 F 44 0 1443 231531 E enquiries markes com z z 3 ei i 7 oO e 3 Air Server MCS User Manual Markes International 3 8 Disconnecting Air Server in order to run tube based methods In order to run tube based methods on UNITY e the Air Server link tube must be disconnected from UNITY e however the carrier gas continues to be directed through the Air Server which acts as a mass flow controller for the split flows e Lift the left hand lever mechanism of the UNITY e tube oven to unseal the link tube from the flow path e Remove the link tube and position out of the way e Re configure the software configuration to remove Air Server from the sampling options Select View Options and click on the Configurations tab In the sampling options check the Manual box then click OK The software will shut down to effect the changes as descri
14. to the desorb and split flow vents at all times The assembly offers sufficient flexibility to allow removal of the desorb pneumatic chassis and access to the cold trap when required However if it ever becomes necessary to disconnect the assembly loosen the nuts on the PEEK tubing itself which contain Graphite Vespel ferrules rather than those attached to the copper vent tubes which contain metal ferrules e If the main UNITY e desorb pneumatics assembly was withdrawn from the cold trap before installing the PEEK link tube assembly this should be replaced following the instructions given in Section 4 2 of the main UNITY e operators manual e Carefully replace the back cover again taking care not to strain the transfer line connection e Replace and tighten the black plastic knob and reconnect the UNITY e gas supplies ensuring that the two lines are connected the right way round e Once the PEEK link tube assembly has been installed and tightened open up the needle valves on both UNITY e pneumatic assemblies until they provide almost no restriction e It is important to remember to reset the desorb flow needle valve when reverting to standard tube desorption See Section 3 8 below 3 2 2 Connection of the Mass Flow Controller e Connect the end of the long piece of PEEK tubing that was passed through the rear bulkhead of UNITY e to the 1 8 fitting on the Air Server labeled FLOW IN top left as you look at the back o
15. Figure 22 UNITY pneumatics connections for running Air Server methods QUI 0004 V6 1 Aug 06 Markes International Ltd T 44 0 1443 230935 F 44 0 1443 231531 E enquiries markes com Markes International 41 42 43 13 13 15 16 18 19 22 23 24 26 27 29 30 32 33 34 35 36 37 37 z z 3 ei o 7 e 3 Air Server MCS User Manual Markes International Figure 23 Configuration set up for running ULTRA methods 38 Figure 24 UNITY pneumatic connection when running tube methods via ULTRA 39 Figure 25 MCSO06 and Air Server 40 Figure 26 Sample and pneumatic interface ports on a Multi Channel Sampler from above 41 Figure 27 Dryer and interface tube installed on Multi Channel Sampler 42 Figure 28 Multi Channel Sampler back panel 42 Figure 29 Configuration tab 43 QUI 0004 V6 1 6 Aug 06 Markes International Ltd T 44 0 1443 230935 F 44 0 1443 231531 E enquiries markes com Z z 3 pi p 7 Oo e 3 Air Server MCS User Manual Markes International The main section of this operators manual refers to the Air Server accessory The Multi Channel Samplers MCSO06 08 are detailed in Appendix One 1 0 Introduction to the Air Server Accessory for UNITY The UNITY Thermal Desorber normally requires sample introduction by means of a standard sample tube This could be a sorbent tube used for diffusive or pumped sampling or an empty tube into which solid
16. TRA is installed it is possible to re collect up to 99 on line air samples automatically onto tubes for sample archiving and method validation purposes ist When re collect is available see above this defines the first tube onto which sample will be recollected Gas Sets the sample gas type so that the correct calibration factor is applied to the mass flow controller Available options are Nj CO Air He or H gt Sample base name The base name given to all the samples within a set to which an automatically incremented number is appended Sample Interval Allows a timed interval to be specified between consecutive samples 0 9 days 00 23 hours 00 59 minutes Note Ifthe sum of the times set within a given method leak test pressure release prepurge sample trap purge and trap fire time exceeds the interval specified here then the interval will not be taken into account In this case consecutive runs will take place one after another at a frequency determined by the overall method duration Set delay Allows an inter set delay to be set between the last sample of a given set and the first sample of the next set The total delay will be equal to the delay time plus the sample interval time therefore if the sample interval is set to 20 minutes and the set delay is set to 40 minutes then the total delay will be 60 minutes between the last sample of a given set and the first sample of the subsequent set The example sh
17. ass 1 16 nut to the brass 1 16 union on the Air Server back plate labeled PURGE IN top right as you look at the back of the Air Server unit Figure 5 e Connect the stainless steel 1 16 nut to the stainless steel union on the Air Server back plate labelled SAMPLE OUT middle second row top as you look at the back of the Air Server unit Figure 5 3 2 4 Requirement for sample pump U ASPMP1 U ASPMP2 If any of the air gas samples are at low or sub atmospheric pressure lt 10psi a pump will be required for UNITY Air Server operation e If a pump is to be used attach the Copper tube adapter SERASU 5025 QUI 0004 V6 1 Aug 06 16 Z z 3 pi p 7 e e 3 Markes International Ltd T 44 0 1443 230935 F 44 0 1443 231531 E enquiries markes com Air Server MCS User Manual Markes International supplied in the pump shipping kit to the 1 8 top middle fitting on the Air Server back plate labeled FLOW OUT see Figure 5 3 2 5 Sample line connection e Sample lines are connected to the fittings at the bottom of the Air Server back plate labelled 3 2 and 1 Figure 5 e They refer to reference blank and sample respectively e The lengths of 1 8 PTFE tubing included in the Air Server shipping kit can be used for sample connection cut to required lengths Note The UNITY Air Server accessory is only rated to 50 psig Standards or samples at pressures higher than th
18. bed in section 3 7 4 above e Re configure the pneumatics from the set up in figure 9 to that shown in figure 10 Figure 9 Pneumatics configured for Air Server operation with T piece on split vent and union on desorb vent QUI 0004 V6 1 2 2 Aug 06 22 Markes International Ltd T 44 0 1443 230935 F 44 0 1443 231531 E enquiries markes com z z 3 Q t O 3 Air Server MCS User Manual Markes International Figure 10 Pneumatics configured for running tube based methods with straight through union on split vent Air Server acts as a mass flow controller for the split flows e Reset the desorb flow to a suitable flow rate for tube based methods see UNITY operators manual section 25 4 0 Developing a UNITY Air Server method for whole air gas analysis 4 1 UNITY Air Server method Once the software has been downloaded to the Air Server the only operating mode available will be On Line Air and an on line sampling method is displayed See figure 11 The system is now ready for use with whole air samples or for continuous on line monitoring of air or gas streams QUI 0004 V6 1 E Aug 06 23 Markes International Ltd T 44 0 1443 230935 F 44 0 1443 231531 E enquiries markes com z z 3 Q t O 3 Air Server MCS User Manual Markes International Figure 11 On line Air Method Screen Note For Air Server systems with serial number GB0O0 A 2xxxx using software
19. e before desorption see Section 21 of the main UNITY e operators manual The Air Server and UNITY e sweep the internal sample flow path including the dryer if fitted out of the split for the first 12 seconds thus ensuring that the metered volume of sample collected on the cold trap is not added to After the 12 second purge to split the carrier gas is switched to flow entirely through the cold trap and eliminate air before the trap is heated Note By careful adjustment of the cold trap sorbents purge volume and cold trap temperature it is also often possible to use the trap purge to QUI 0004 V6 1 2 S Aug 06 26 z z 3 pi o 7 oO e 3 Markes International Ltd T 44 0 1443 230935 F 44 0 1443 231531 E enquiries markes com Air Server MCS User Manual Markes International selectively eliminate water and or solvents without losing compounds of interest The Trap purge time parameter determines the length of time that the carrier gas is purging through the cold trap and includes by default the initial 12 second purge to split Trap purge flow Range 5 100 ml min This determines the flow rate of carrier gas during the trap purge procedure above Check boxes for pump Serial number GBO0 A 1xxxx and software version 2 2 0 or earlier If the pump is fitted and switched on it is possible to select for it to be on or off for any particular method using the Pump On check box Note It is
20. e created your new Air Server method and saved it you are ready to create your first sequence Right click in the sequence builder to bring up the contextual menu and select New Sequence and a new empty Automation Window will appear It is good practice at this point to save this new sequence under a suitable file name in the example given in figure 11 the name chosen was Example seq to do this use the File Save As function in the main software window Having saved your new sequence the next step is to create your first set As before right click to bring up the contextual menu and select Add OLA Set This will bring up the Select Method to be used with Sample or Set dialogue which allows you to select the saved method you wish to use Once the method has been selected the Add New Set dialogue box will appear as shown on the left hand side in figure 15 with the selected method entered in the Method box HF Add New Set x fF Add New Set x Set Name Set Name Bet_02 24 hr round the clock sampling Method Method C Program Files UnitySMethods 400 ml mth C Program Files Unity Methods 400 ml mth Channel Samples No of Injection Channel Samples No of Injection fi fi x f fi gt 24 x fi 7 Recollect 1st Gas Recollect 1st Gas None 1 N2 IN ne fi z AIR 7 Sample base Name Cancel _ Sample base Name Cancel S ample02_ OK 400ml 10min 40min _ OK Sample Interval day
21. erver MCS User Manual Markes International Note it is good practice to save your sequence prior to running it 5 3 Running the sequence Before starting the run you will need to make the sequence you have created into the controlling sequence This is easily achieved by clicking the x icon on the menu bar The next step is to set the sequence going by clicking on the Run button in the UNITY e Toolbar see Section 30 of the main UNITY e operators manual Once Run is clicked then you will be prompted to start immediately e Yes triggers the UNITY Air Server system to start straight away e No opens the Start Time Dialogue box see below e Cancel takes the system back into standby to allow further editing of the newly created sequence If the sequence is set to run immediately then the start time column in the sequence builder will be filled with the relevant start times for each of the samples Note if recycle is chosen then only the start times for the first run through the set are shown these start times are updated each time a full cycle is completed Once running progress through the sequence may be monitored via the sequence reporter tab in the Automation Window figure 17 Figure 17 Sequence Reporter during a run The parameters reported in the sequence reporter may be changed by going to View then selecting Options and then selecting the Reporting Tab figure 18 Click on the paramete
22. etylene to n C 4 can be quantitatively sampled and retained The sample standard gas once stripped of its target VOCs exits through the desorb flow vent and is directed to the flow in port of the electronic mass flow controller on the Air Server It is not possible to split during sampling Set and actual sampling flows are displayed via the UNITY software If the sample standard gas is pressurised gt 10 psi the flow through the entire UNITY Air Server system is driven by this pressure However if the sample is at low lt 10 psi atmospheric or just below atmospheric pressure a pump U ASPM1 U ASPM2 is required to pull the gas phase sample through the system Figure 2 shows the UNITY Air Server system in standby mode Note that the flow controller and the optional pump are located downstream of the cold trap and thus do not come into contact with the sample prior to trapping At the end of sampling and after a purge of carrier gas to eliminate air from the trap the UNITY focusing trap heats in the normal way transferring compounds of interest to the analytical system and triggering the measurement cycle The outlet split at this point may be entered in the software and is controlled by the mass flow controller Collection of the next sample can begin if required as soon as the cold trap has re equilibrated at its trapping temperature The UNITY Air Server sequence of operation is as follows Standby Leak test o
23. f the Air Server unit see Figure 5 QUI 0004 V6 1 z Aug 06 14 z z 3 pi p 7 e e 3 Markes International Ltd T 44 0 1443 230935 F 44 0 1443 231531 E enquiries markes com Air Server MCS User Manual Markes International Figure 5 Connections on the back of the Air Server Unit This connection controls the flow through the UNITY e cold trap during sampling via the downstream mass flow controller inside the Air Server which also controls the split flow during trap heat 3 2 3 Connecting UNITY e to Air Server Link tube SERASU 5021 when no dryer is fitted Note the Air Server Link tube is connected differently whenever the Air Server is configured with a dryer see section 3 5 on dryer installation below e The UNITY e to Air Server Link tube comprises a sample tube with two lengths of 1 16 stainless steel tubing attached figure 6 QUI 0004 V6 1 Aug 06 15 Markes International Ltd T 44 0 1443 230935 F 44 0 1443 231531 E enquiries markes com z z 3 Q t O 3 Air Server MCS User Manual Markes International Figure 6 Air Server Link tube connecting UNITY e and Air Server e One end of the link tube terminates with a brass nut this carries the inert purge gas supply from UNITY e to the Air Server and the other end terminates in a stainless steel nut this carries the sample or purge gas from the Air Server to UNITY e e Connect the br
24. for dryer Optional Required for monitoring ultra volatile compounds in humid atmospheres SERASU 5023_ Nafion Dryer Assembly 1 SERZ 0036 PTFE tubing 1 8 for Air inlet 2m Note that the Air Server Nafion dryer requires a pressure regulated 15 psi supply of around 200 ml min dry gas air or nitrogen with a dew point below 35 C as required for UNITY Note also that appropriate fittings will be required to connect the regulated dry gas supply to the 1 8 PTFE Air Inlet tubing provided 3 0 Installation Note It is strongly recommended that the installation of the Air Server is carried out by a qualified fully trained engineer If the Air Server has been purchased as part of a complete UNITY Air Server system it is recommended that the UNITY e system is installed and tested first see UNITY Operators Manual Section Section 4 0 After successful completion of the UNITY system the Air Server should be installed as detailed below The Air Server must sit to the immediate left of UNITY e as you look at the system from the front see Figure 1 At least 15 cm of free bench space is QUI 0004 V6 1 z Aug 06 11 Markes International Ltd T 44 0 1443 230935 F 44 0 1443 231531 E enquiries markes com z z 3 pi o 7 oO e 3 Air Server MCS User Manual Markes International required in addition to that required for UNITY e itself Note the UNITY e Thermal Desorber must be switched
25. he instructions in UNITY e user manual Appendix 1 to remove any previous version of software Download the software to UNITY as described in Section 6 2 of the main UNITY user manual Once the download is complete access the configuration tab under View Options and select the Air Server from the list of sampling options as described in section 3 7 above see figure 29 Methods Gas Sequence Ports Configuration Reporting Miscellaneous m Automation r Sampling m Re collection AiServer and Ult AiServer Autosecure 2nd UltATD C UltATD 50 50 Same UItATD Manual Manual m Ultr Load Unload Temperatres LoadT emp J UnLoadT emp J r Blank Tubes Sampling UltrA Y Re collection Ulti Y sirserver Channels Number Of Channels 3 v C I External Valve Present J StandbyFlowOn I Use Ultr with AirServer F Use Unity with Flow Control Module J Use Unity with OMB Sensor Figure 29 Configuration tab Next select the number of channels required either 6 MCS06 or 8 MCSO8 N B the default value is 3 which corresponds to an Air Server installation The number of channels configured determines the number that can be programmed from within the UNITY software QUI 0004 V6 1 z Aug 06 43 Markes International Ltd T 44 0 1443 230935 F 44 0 1443 231531 E enquiries markes com z z 3 pi o 7 oO e 3
26. i i 7 oO e 3 QUI 0004 V6 1 Aug 06 Markes International Ltd T 44 0 1443 230935 F 44 0 1443 231531 E enquiries markes com Air Server MCS User Manual Markes International 4 0 Developing a UNITY Air Server method for whole air gas analysis 4 1 UNITY Air Server method 4 2 Setting the carrier gas type 4 3 Parameters for on line mode methods 4 4 On line methods 5 0 Automatic sequencing of whole air gas analyses 5 1 Performing analyses 5 1 1 Using the sequence builder and creating sequences of runs 5 2 Setting up your first sequence 5 3 Running the sequence 5 4 Starting at a predefined date and time 5 5 Stopping a sequence 6 0 Using the Air Server with an ULTRA UNITY system 6 1 Installation of the ULTRA UNITY Air Server system 6 2 Running Air Server Methods 6 2 1 Configuration changes 6 2 2 Pneumatics set up 6 3 Running ULTRA methods 6 3 1 Configuration changes 6 3 2 Pneumatics set up Appendix 1 Multi channel samplers MCSO6 and MCSO8 QUI 0004 V6 1 sae Aug 06 Markes International Ltd T 44 0 1443 230935 F 44 0 1443 231531 E enquiries markes com 23 23 24 24 28 28 28 28 30 33 34 34 35 35 36 36 37 37 38 38 40 z z 3 ei i 7 oO e 3 Air Server MCS User Manual A1 2 Attaching the optional in line dryer A1 3 Identifying connections on the back panel A1 4 Configuring the MITD software for the MCS variants of Ai
27. ion Reporting Miscellaneous Sequence AirServer wait for external ready before prepurge M Use Dry Purge F DryPurge Standard I Turn on Unty Tube Heater with AirServer PT Tur on Ultr Tube Heater F Turn on Re collection Tube Heater Pre Trap Fire Purge Time AirServer Post Leak Test Pressure Release Time Post Tube Desorb Pressure Release Time Figure 12 Pressure release settings within the Options menu Note The default value is 0 3 values greater than this may be required particularly if sampling from very low pressure source such as tedlar bags Prepurge time Range 0 0 to 99 9 minutes selectable in 0 1 minute increments This ensures that the UNITY Air Server flow path and individual sample lines leading up to the Air Server are swept with the current sample before sample collection This allows accurate metering of a volume of sample during the sample collection phase without either contamination from previous samples or dilution by carrier gas The mass flow controller controls the pre sample purge flow to that set for sampling The pre sample purge flow is all directed down the split line None of the gas is allowed to pass into the cold trap Trap purge time Range 0 2 to 99 9 minutes selectable in 0 1 minute increments This relates to the post sampling purge of the sampling lines and cold trap with carrier gas before the trap is desorbed It is analogous to the ambient temperature purge of the tub
28. is must be regulated to lower pressures using appropriate pneumatic controls before they are connected to an inlet on the Air Server 3 3 Electrical and PC connections e Attach the power lead to the POWER IN ON OFF switch socket on the back of the Air Server e Attach the PC to Air Server cable SERZ 0189 to the 9 pin D connector on the back of the Air Server labeled IN see Figure 5 3 4 Configuring the pump optional If the pump is required see above e attach the power cord from the pump to the socket labeled PUMP SUPPLY on the back of the Air Server e Connect one length of silicon rubber tubing to the outlet of the pump and use the other to link the pump inlet to the Copper tube adapter installed onto the FLOW OUT fitting on the back of the Air Server See Figure 5 3 5 Configuring the dryer optional The Markes International dryer incorporates a semi permeable membrane which selectively eliminates water and polar organic compounds from a gas or air stream The selectivity of the dryer is sometimes an advantage for example when monitoring multiple trace level hydrocarbons in real time in ambient air using GC and FID However note that alternative less selective drying options e g use of hydrophobic sorbents high split ratios etc can be applied for higher boiling less volatile than ethane or higher concentration samples See Markes Thermal Desorption Technical Support Note TDTS26
29. l Ultr Load Unload Temperatres LoadTemp 50 0 UnLoadT emp i 00 0 Blank Tubes Sampling Ultra v Re collection Ultr X irServer Channels Number Of Channels z F Use Ultr with AirServer F Use Unity with OMB Sensor OK Figure 23 Configuration set up for running ULTRA methods This will allow you to run tube methods via ULTRA and to use the Air Server as a Mass Flow Controller for the split vent 6 3 2 Pneumatics set up The UNITY pneumatics should be configured as shown in figure 24 to allow mass control from the Air Server of the UNITY split vent Z z 3 pi p 7 Oo e 3 QUI 0004 V6 1 z Aug 06 38 Markes International Ltd T 44 0 1443 230935 F 44 0 1443 231531 E enquiries markes com Air Server MCS User Manual Markes International Figure 24 UNITY pneumatic connection when running tube methods via ULTRA z z 3 Q t O 3 QUI 0004 V6 1 2 Aug 06 39 Markes International Ltd T 44 0 1443 230935 F 44 0 1443 231531 E enquiries markes com Air Server MCS User Manual Markes International Appendix 1 Multi channel samplers MCSO6 and MCSO8 The standard Air Server described in the manual comes with three sampling ports typically designated as sample reference and blank channels When a multi channel sampler is used it extends the number of sampling ports to either six MCSO6 or eight MCSO8 Figure 25
30. n the Sequence Builder section of the Automation Window brings up the contextual menu shown The contextual menu contains six items New Sequence Creates a new blank sequence in a new Automation Window Open Sequence Opens the File Open dialogue to allow a previously saved sequence to be opened in a new Automation Window Add Sequence Opens the File Open dialogue to allow a previously saved sequence to be appended to the end of the current sequence Add New Set Opens the Add New Set dialogue see section 6 2 and once the new set has been defined it is appended to the next available row in the sequence Add Sample Adds a single sample to a set within a sequence only available once a Set has been expanded by clicking on the plus sign located to the left of the Set name QUI 0004 V6 1 z 2 Aug 06 29 Markes International Ltd T 44 0 1443 230935 F 44 0 1443 231531 E enquiries markes com Z z 3 pi o 7 oO e 3 Air Server MCS User Manual Markes International Delete Item Deletes the selected row this may also be performed by pressing the Delete button on your keyboard 5 2 Setting up your first sequence The first stage to setting up a single analysis or series of analyses is to edit and save an Air Server method with convenient parameters In the example shown in figure 11 a method has been set up to take 400 ml of sample in 10 minutes and saved under the name 400 mli mth Once you hav
31. ns the flow of carrier gas to the analyser s is determined by the head pressure of the gas and impedence of the analytical system e g GC column sensor restrictor etc Split flow during trap heat Range 5 100 ml min It is possible to split the sample as it desorbs during trap heat In this case the carrier gas head pressure drives the flow of carrier gas through the hot trap and determines the flow to the analyser s The flow to the split vent and consequently the split ratio is determined by the split flow setting and is controlled by the mass flow controller Note Other cold trap parameters are as described for tube desorption methods see Section 22 2 1 of the main UNITY e operators manual 4 4 On line methods Once an on line mode method has been generated it is treated in the same way as one of the tube desorption methods with respect to controlling system operation storage recall and method linking see Section 17 of the main UNITY e operators manual 5 0 Automatic sequencing of whole air gas analyses 5 1 Performing analyses The UNITY Air Server system runs in a fashion analogous to that of the automated UNITY ULTRA system in that the Automation Window provides the top level control for running the instrument The Automation Window allows the user the freedom to run a single method or a complex sequence of timed analyses with minimal effort 5 1 1 Using the sequence builder and creating sequences of runs
32. off before installing the Air Server accessory 3 1 Tools required To complete the installation you will need the following tools 7 16 wrench spanner 5 16 wrench spanner e Small posidrive screwdriver required for the optional dryer only 3 2 Pneumatic connections 3 2 1 Installation of PEEK link tube assembly The installation procedure for this item is as follows e Ensure UNITY e is switched off e Turn off the supplies of carrier gas and air to UNITY e e Disconnect the carrier gas and air supplies from the top back panel of UNITY e e Undo the black plastic knob on the top back UNITY e panel and carefully slide back the top rear painted cover Take care not to put any strain on the transfer line connection e Install the bulkhead connector into the slot on the inner back top plate of UNITY e Figure 3 e Working from the front thread the long length of 1 16 PEEK tubing through the conduit located to the right between the analyser and base see Figure 4 out of the back and up and through the bulkhead connector shown in Figure 3 QUI 0004 V6 1 z P Aug 06 12 Markes International Ltd T 44 0 1443 230935 F 44 0 1443 231531 E enquiries markes com z z 3 pi o 7 oO e 3 Air Server MCS User Manual Markes International Uncut PEEK tubing fed through bulkhead connector Figure 3 Bulkhead connector located at the rear of UNITY e with uncut PEEK tubing fed through
33. own on the right hand side of Figure 15 shows the Add Set dialogue with typical parameters filled in for creating a round the clock sampling sequence The set that will be created will have the following characteristics It will be called 24 hr round clock sampling All the runs will be associated with the 400ml sample volume method set up earlier All samples will be taken down sample channel 1 the Sample channel The total number of samples within the set is 24 Each sample row will only be run once note that here if the number of samples was set to one but the number of injections set to 24 then this would achieve the same overall result but make later editing of the set more QUI 0004 V6 1 Aug 06 31 Markes International Ltd T 44 0 1443 230935 F 44 0 1443 231531 E enquiries markes com z z 3 pi o 7 oO e 3 Air Server MCS User Manual Markes International difficult e Re collection is not available so it is greyed out as is the first tube number e The sample gas type is defined as air e The sample base name is 400ml 10min 40mI min _ a very descriptive name is useful as the report tables may be imported into GC acquisition software e The inter sample interval is set to 1 hour Note in this case the sampling time set in the method is ten minutes and therefore the UNITY Air Server will sample for the first ten minutes of every hour e There is no inter set delay e Clicking on OK p
34. ptional Pressure release Pre purge Sampling Line purge Trap purge Trap fire Further information is given in Section 5 3 QUI 0004 V6 1 8 Aug 06 Markes International Ltd T 44 0 1443 230935 F 44 0 1443 231531 E enquiries markes com z z 3 pi p 7 Oo e 3 Air Server MCS User Manual Markes International To GC Optional veers Pressure Tao EPC Heated Valve ie SLL Optional N Recollection y Split tube ths If SAMPLE Always Gas flowing MFC Optional in AS Gas flow Pressure no No pressure iy S To Vent No flow i Carrier gas RED carrier optionally BLUE sample from EPC Figure 2 Standby Mode Key Air Server applications include e Continuous on line measurement of C to Cio hydrocarbons in ambient air using UNITY Air Server with GC FID e Process monitoring of trace level volatiles in CO using UNITY Air Server with process MS e Process monitoring of aroma during food and beverage production using UNITY Air Server combined with electronic nose technology z z 3 pi o 7 oO e 3 QUI 0004 V6 1 9 Aug 06 Markes International Ltd T 44 0 1443 230935 F 44 0 1443 231531 E enquiries markes com Air Server MCS User Manual Markes International 2 0 Installation of the Air Server accessory onto UNITY Note that if the Air Server has been ordered as part of a complete UNITY Air Server package it is best to complete the UNITY installa
35. r Server Table of Figures Figure 1 UNITY Air Server Figure 2 Standby Mode Figure 3 Bulkhead connector located at the rear of UNITY e with uncut PEEK tubing fed through Figure 4 Air Server connections to the front of UNITY e Figure 5 Connections on the back of the Air Server Unit Figure 6 Air Server Link tube connecting UNITY e and Air Server Figure 7 Mounting bracket attached to the back panel of the Air Server Figure 8 Mounting bracket attached to the back panel of the Air Server opposite view Figure 9 Pneumatics configured for Air Server operation with T piece on split vent and union on desorb vent Figure 10 Pneumatics configured for running tube based methods with straight through union on split vent Air Server acts as a mass flow controller for the split flows Figure 11 On line Air Method Screen Figure 12 Pressure release settings within the Options menu Figure 13 UNITY Air Server status bar Figure 14 Right clicking within the Sequence Builder section of the Automation Window brings up the contextual menu shown Figure 15 Add New Set dialogue box before left and after right editing Figure 16 Sequence created using the set defined in Figure 13 Figure 17 Sequence Reporter during a run Figure 18 Options Reporting tab Figure 19 Air Server connections to ULTRA see also ULTRA Operators Manual Figure 20 ULTRA to Air Server connections Figure 21 Configuration for Air Server methods
36. roduces the Sequence shown in Figure 16 to view the expanded version of a set click on the plus sign next to the set name a ie Saree Sange oe iroe Snote Sepe ce Soe ce Saco beoe Soe cee 1ce Saroe Joe ce Saree ioe Se See ee ee ee ee EE Figure 16 Sequence created using the set defined in Figure 13 In a true air monitoring scenario it would be convenient to include in this set a run of zero gas to check the instrument blank and a run of calibration gas to check retention times and response factors Close scrutiny of the sequence shown in Figure 16 will reveal that lines 23 calibration standard run and 24 blank run have already been edited to do this This can be done quite simply by double clicking on any of the parameters to change them note that the gas for the blank and calibration has been changed from Air to Nitrogen It will also be common in an Air monitoring scenario to want to run the same set of runs again and again This may be achieved simply by clicking the recycle check box top left in the automation window where you will be prompted to define a number of re cycles e g If Stop after 1 re cycle is selected then the sequence is run through twice If nothing is entered then this set of runs will run indefinitely QUI 0004 V6 1 z Aug 06 32 Markes International Ltd T 44 0 1443 230935 F 44 0 1443 231531 E enquiries markes com lt 3 ey o 4 A e 3 Air S
37. rs that you wish to view in the Sequence Report Note a spreadsheet view of this Sequence Report csv file can be created from this Reporting Tab by clicking Create Report File and saving the file QUI 0004 V6 1 2 Aug 06 33 Markes International Ltd T 44 0 1443 230935 F 44 0 1443 231531 E enquiries markes com Z z 3 pi o 7 oO e 3 Air Server MCS User Manual Markes International Methods Gas Sequence Ports Configuration Reporting Miscellaneous Reporting Sample Name Sample Channel JV Sample Gas Method Name Sampling Start Time V Sampling End Time V Sample Type Sample Volume Maximum Flow IV Minimum Flow Trap Fire Time Unity Deviation IV Air Server Deviations Injection Count I Cycle Count OK Figure 18 Options Reporting tab 5 4 Starting at a predefined date and time If the start of the sequence needs to be delayed until a very specific date and time then clicking No when prompted to start immediately will bring up the Start Time dialogue box Here it is possible to define the start date and time down to the nearest minute and as far in advance as wished 5 5 Stopping a sequence Clicking the stop icon see Section 31 of the main UNITY operators manual when in Air Server mode will present you with several options e Continue Running this will allow you to continue uninterrupted if you have clicked stop by accident e Stop after next
38. rs which differ from those used in standard tube desorption methods For common parameters such as the flow path temperature reference is made to the relevant sections of the main UNITY operators manual Split on in standby This is the same parameter used in tube desorption methods see Section 19 of the main UNITY operators manual except that in on line mode the flow through the split in standby is controlled by the electronic mass flow controller The flow range is from 5 100 ml min and may be set as required Standby split flow Type in the standby split flow Range 5 100 ml min as required Leak test Given that UNITY Air Server systems are commonly used in a continuous or semi continuous sequence by recycling or linking methods and given that there is no need to break into the sample flow path by using the lever mechanism to change a tube between samples the leak test is optional in on line mode However if a sequence of air analyses is to be run in on line mode and with the leak test de selected it is recommended that an initial leak test be carried out to check system integrity before initiating the series of runs To do this first set up the run with leak test selected i e check the appropriate box Ensure that the UNITY e to Air Server Link tube is properly located in the desorption oven with the lever mechanism fully down as described above Initiate the run using the Start run command see Section 30 of
39. s hours minutes 0 00 00 Sample Interval days hours minutes 0 01 00 Set Delay days hours minutes 0 00 00 Set Delay days hours minutes 9 00 00 Figure 15 Add New Set dialogue box before left and after right editing The parameters within the Add New Set dialogue are the following Set Name Alphanumeric name given to a set to describe its contents it is the only name that will be visible when a set is collapsed Method The UNITY Air Server method that will initially be attributed to all the members of this set By default the software automatically inserts here the most recently modified method Alternatively double clicking in QUI 0004 V6 1 Aug 06 30 Markes International Ltd T 44 0 1443 230935 F 44 0 1443 231531 E enquiries markes com Z z 3 a D 7 Oo e 3 Air Server MCS User Manual Markes International this box with the left hand mouse button opens the File Open dialogue allowing selection of an existing UNITY method Channel The channel that will initially be attributed to all the members of this set 1 Sample channel 2 Blank channel 3 Reference channel The channel number set here corresponds to the numbers shown on the back panel of the Air Server see Figure 5 Samples The number of separate sample rows to be included within a set Injections The number of times each sample row will be repeated Recollect When an optional re collection UL
40. shows a comparison between a 6 port multi channel sampler and the standard Air Server Figure 25 MCS0O6 and Air Server Besides the number of sampling ports the big difference between the two systems is the positioning of the pneumatics connections On a standard Air Server the pneumatics connections are all made on the back panel see section 3 2 on the multi channel system all of the pneumatics connections apart from the inlet to and outlet from the mass flow controller are situated on the top of the instrument A1 1 Installing and configuring the multi channel sampler The installation of a multi channel sampler does not differ greatly from the installation of a standard Air Server see section 2 with the exception of the position of the sample and pneumatic interface ports see figure 26 QUI 0004 V6 1 2 Aug 06 40 Markes International Ltd T 44 0 1443 230935 F 44 0 1443 231531 E enquiries markes com z z 3 Q t O 3 Air Server MCS User Manual Markes International Tapped holes to attach optional dryer bracket Sample OUT to UNITY stainless via dryer if present Purge IN from UNITY brass Sampling ports to 6 Figure 26 Sample and pneumatic interface ports on a Multi Channel Sampler from above A1 2 Attaching the optional in line dryer Where the optional in line Nafion dryer has been supplied with the multi channel sampler it should be mounted as shown in figure 27 u
41. sing the screws supplied further details on dry gas type flow and pressure are given in section 3 5 QUI 0004 V6 1 E z Aug 06 41 Z z 3 pi o 7 oO e 3 Markes International Ltd T 44 0 1443 230935 F 44 0 1443 231531 E enquiries markes com Air Server MCS User Manual Markes International Figure 27 Dryer and interface tube installed on Multi Channel Sampler A1 3 Identifying connections on the back panel Inlet to mass flow controller stainless from UNITY vents Outlet from mass flow controller brass Attach optional pump here Power in fuse and switch Power out to optional dryer RS232 COM port Figure 28 Multi Channel Sampler back panel Please note that unlike Air Server there is no provision for a power out socket to supply the optional pump If a pump is required to draw a low pressure sample through the system then it will require a separate mains supply Pneumatically QUI 0004 V6 1 2 E Aug 06 42 z z 3 Q A Q O 3 Markes International Ltd T 44 0 1443 230935 F 44 0 1443 231531 E enquiries markes com Air Server MCS User Manual Markes International the pump should be attached as with Air Server to the outlet from the mass flow controller on the back panel of the instrument see section 3 2 4 A1 4 Configuring the MITD software for the MCS variants of Air Server The MCSO6 and MCSO8 samplers require MITD software version 2 0 0 or later Follow t
42. strongly recommended that the pump is left on all the time i e the check box is always ticked Serial number GBO0 A 2xxxx and software version 2 2 0 or earlier The check box has no function Check boxes for dryer If a dryer is installed on the back of the Air Server Dryer On must be selected in the method by checking the appropriate box Note Failure to do this will lead to sample passing into the membrane dryer without the counter flow of dry air nitrogen being actuated This can cause contamination of the dryer The dryer will not function without the appropriate hardware being installed Sample time Range 0 0 to 999 9 minutes selectable in 0 1 increments After the leak test if selected and after the pre sample purge the flow of sample air gas is directed to the electrically cooled trap of UNITY e for the time set as sample time Flow rate Range 5 100 ml min This determines the flow of sample air gas into the cold trap for the sampling time It is controlled by the mass flow controller inside the Air Server and is independent of the pressure of the sample During sampling the actual flow will be displayed in the System Status box of UNITY e software see figure 13 Propane O Bt psi 5 Unity Unity Popup AR Nefesi AuServer Hitlers 1510C Figure 13 UNITY Air Server status bar GC Cycle time Entry of GC cycle time allows collection of the next sample to overlap the analysis of the previous
43. the left of the instrument at the far side of the desorption oven cover see figure 6 e Adjust the position of the Air Server unit until this can be achieved without placing undue strain on any part of system hardware 3 7 Loading system software The minimum PC specifications required for UNITY Air Server operation are the same as those required for UNITY e alone UNITY e Operators manual Section 2 1 plus one additional free serial port Note If sufficient serial ports are not available on the PC then a USB hub system may be used as described in UNITY e Operators manual Appendix Four 3 7 1 Installing UNITY Air Server software onto a PC that has never before been used for UNITY control Follow the instructions given for UNITY e software in the UNITY e Operators Manual Section 6 1 3 7 2 Installing UNITY Air Server software onto a PC that has previously been used for UNITY control If your Air Server is to be added to an existing UNITY installation the accessory will have been shipped with a new set of UNITY Air Server software This software will replace the software you have been using to operate UNITY as a standalone device Before installing the software upgrade the old UNITY software must be completely uninstalled from the PC This should be done following the method given in Appendix One of the main UNITY operators manual Uninstalling UNITY software from the computer Once the old software has been completely removed
44. the main UNITY operators manual Watch as the instrument performs the complete leak test If the leak test is successful stop the run immediately as described in Section 31 of the main UNITY e operators manual The on line mode method can then be modified to de select the leak test before running the sequence of samples Save the method at this stage If the leak test is not successful re check the seal of the UASL link tube and all the connections between UNITY e and the Air Server Pressure release The Air Server can be used to sample using a pump or directly from a pressurised container In standby figure 2 the UNITY e trap and internal flow path is at the pressure of the column In the case of a pressurised source if the carrier gas pressure is greater then the pressure of the sample then carrier gas will flow into the container when the sequence enters pre purge In order to avoid dilution of the sample with carrier gas the pressure of the UNITY e flow path is first reduced by venting carrier gas through the split line prior to opening any sampling valves The duration of this vent is set in the View gt option gt sequence section of the UNITY e software figure 12 QUI 0004 V6 1 2 Aug 06 25 z z 3 pi o 7 oO e 3 Markes International Ltd T 44 0 1443 230935 F 44 0 1443 231531 E enquiries markes com Air Server MCS User Manual Markes International Methods Gas Sequence Ports Configurat
45. tion first as described in Section 4 of this manual Instructions for installing Air Server onto an existing UNITY should then be followed see below 2 1 Unpacking procedure Remove the contents from the Air Server shipping box and associated pump and dryer accessories as appropriate Inspect and check every item against the packing lists below 2 2 Packing list for Air Server U AIRSV Documentation pack containing Operators manual QUI 0004 Installation engineer feedback form 1 Brochure pack Certificate of Conformity 1 with unit Union brass 1 8 x 1 8 1 Mains cable Type ea Pk 10 Ferrule 1 8 x 1 16 Graphitised vespel c i Union brass 1 8 tee peter nee PEEK 1 16 OD x 0 03 bore fama ua PEEK 1 16 OD x 0 03 bore These items constitute the connection kit for the UNITY e FLOW OUT vents desorb and split to the Mass Flow controller FLOW IN port on the Air Server 1 1 m QUI 0004 V6 1 E Aug 06 10 Markes International Ltd T 44 0 1443 230935 F 44 0 1443 231531 E enquiries markes com z z 3 ei T o 7 e e 3 Air Server MCS User Manual Markes International 2 3 Packing list for pump Optional Required where the gas or air sample is below 10 psi 1 U ASPMP1 Pump 115V or or U ASPMP2 Pump 230V SERASU 5025 Copper Tube Adaptor SERZ 0206 Tubing Silicone Rubber x 500 mm SERZ 0207 Pump Power Cord connects to Air Server 2 4 Packing list
46. usts from the dryer as shown in figure 7 e Connect the 1 16 stainless steel nut of the UNITY to Air Server Link tube SERASU 5021 to the SAMPLE OUT point of the dryer see figure 7 e Connect the 1 16 sample inlet to the dryer to the 1 16 SAMPLE OUT union on the back of the Air Server see figures 5 and 7 e The purge arm of the UNITY to Air Server Link tube which ends with a brass nut connects into the 1 16 brass union labeled PURGE IN on the back of the Air Server as usual 3 6 Installing the UNITY e to Air Server Link tube in UNITY e QUI 0004 V6 1 Aug 06 19 Z z 3 pi o 7 oO e 3 Markes International Ltd T 44 0 1443 230935 F 44 0 1443 231531 E enquiries markes com Air Server MCS User Manual Markes International Once all the pneumatic and electrical connections have been made e position the Air Server immediately to the left of UNITY e as you look at the front of the system Figure 1 e Bend the sample tube of the UNITY e to Air Server Link tube downwards keeping the end to which the two 1 16 tubes are attached pointing to the rear of the instrument e Locate the link tube in the UNITY e tube desorption oven as if it was a standard tube Move the left hand lever mechanism of UNITY e to seal the link tube into the UNITY e flow path Note when the lever is fully down the two 1 16 tubes connected into the link tube should be protruding to

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