UNITY 2 TM Air Server Series 2 Installation Manual Version 1.12 September 2012 1. Installation...2 1.1. Tools required...2 1.2. Procedure...2 1.3. Requirement for a sample pump (U-ASPMP1 / U-ASPMP2)...8 1.4. Sample line connection...8 1.5. Configuring the dryer (optional)...9 2. Loading the UNITY 2 Air Server software...10 2.1. Switching on...11 2.2. Configuring UNITY 2-Air Server and MFC...Error! Bookmark not defined. 2.3. MFC setup...11 3. Calibrating the MFC...12 4. Disconnecting Air Server (to run tube based methods)...14 QUI-1049 Air Server Series 2 Installation Manual 1
1. Installation Caution: It is strongly recommended that the installation of the Air Server is carried out by a qualified (fully trained) engineer. Note: The below procedure only applies to Air Server instruments from serial number (GB00)A30125 onwards. For earlier instruments please refer to the hard copy manual included with the instrument. The Air Server sits to the immediate left of UNITY 2 (as you look at the system from the front). At least 10 cm of free bench space is required in addition to that required for UNITY 2 itself. 1.1. Tools required To complete the installation you will need the following tools: 7/16 wrench / spanner x2 5/16 wrench / spanner Posidrive screwdriver Small flat head screwdriver 1.2. Procedure Ensure UNITY 2 is switched off and any supplies of carrier gas and air are disconnected. Remove the front cover on UNITY 2 by pulling back and lifting. Unscrew the 2 screws securing the front panel. 3. Remove the front panel. Slide the side panels towards the front of the instrument then lift away to remove. 1. 2. QUI-1049 Air Server Series 2 Installation Manual 2
Remove the 6 screws highlighted. Remove the side panel from the Air Server. Remove the 2 screws securing the MFC and move to one side. Secure the Air Server to the UNITY 2 with 6 M4 x 10 mm screws supplied. Note: The UNITY 2 frame will need to be lifted to locate the first screw. The final 2 screw holes can be accessed by loosening off the 2 screws securing the valve retention plate (blue circles) and sliding the plate to one side Re-secure the MFC. QUI-1049 Air Server Series 2 Installation Manual 3
Connect the blue Air Server solenoid valve drivers into PL6 on the main control PCB. Note: On UNITY 2 instruments with serial number greater than (GB00)U21085 this step is not required Insert the 2 loose white wires in the positions shown on PL5. The wires should be inserted with the barbs facing the outside of the block. Check the wires are secure. Route the wires through to the Air Server. Connect the nafion power as shown. Note: On UNITY 2 instruments with serial number greater than (GB00)U21085 the nafion power wires are secured to the chassis The valves connect into the black connector in the order shown. 1 2 3 4 5 6 7 8 1 2 3 QUI-1049 Air Server Series 2 Installation Manual 4
Unplug the green patch cable from the main control PCB (which routes to the top of the instrument). Route and connect the green patch cable from the flow board on Air Server to the connector on the main control PCB. Using the supplied PEEK tubing T the desorb and split outputs together and run the tubing in through the frame to the flow input of the MFC. Connect the Air Server Link Tube to Air Server: One end of the link tube terminates with a 1/16 brass nut which connects to the brass 1/16 union labeled PURGE IN. The other end terminates in a stainless steel nut and connects to the stainless steel 1/16 union labeled SAMPLE OUT. DRYER SAMPLE OUT PURGE IN Note: If a dryer is to be fitted, see Section 1.5 QUI-1049 Air Server Series 2 Installation Manual 5
Fit the modified UNITY 2 side panel and secure with a screw at the front of UNITY 2. Replace the Air Server side cover and secure with one screw at the front and 2 at the back. Modify the UNITY 2 tube oven cover by unscrewing the black knob, removing the 2 metal extension piece then reattaching the black knob. QUI-1049 Air Server Series 2 Installation Manual 6
Fully raise the modified tube oven cover on UNITY 2. Carefully position the sample tube horizontally into the tube oven / cradle on UNITY 2. Gently but firmly lower the tube oven cover on UNITY 2. The oven cover must be lowered completely to ensure a good seal. Replace all covers on UNITY 2 and attach all power, communication and gas supplies. Note: Air Server needs no extra power or communication cables. QUI-1049 Air Server Series 2 Installation Manual 7
1.3. Requirement for a sample pump (U-ASPMP1 / U-ASPMP2) If any of the air / gas samples are at low or sub-atmospheric pressure (<10 psi), a pump will be required for UNITY-Air Server operation. If a pump is to be used, attach the Copper tube adapter (SERASU-5025) to the flow out side of the MFC on Air Server. If using 2 MFCs the pump must be connected to the outlet of both MFCs. 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 fitting on the Air Server. Attach Pump Here FLOW OUT 1.4. Sample line connection Sample lines are connected to the 1/8 fittings on the Air Server (3 channel model shown below). 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 Air Server accessory is only rated to 50 psig. Standards or samples at pressures higher than this must be regulated to lower pressures using appropriate pneumatic controls before they are connected to an inlet on the Air Server. QUI-1049 Air Server Series 2 Installation Manual 8
1.5. 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. Note that on newer systems the DRYER connection may be a two pin molex connector. The nafion dryer assembly comes with two types of fittings (as shown) to accommodate all systems. Attach the mounting bracket of the dryer to the top panel of the Air Server using the two screws and washers provided. Orientate the dryer such that the knob of the needle valve is pointing forwards. Plug in the circular electrical fitting to the circular socket labeled DRYER on the Air Server top panel. Connect the 1/16 sample inlet to the dryer to the 1/16 SAMPLE OUT union on the top of the Air Server. Connect the 1/16 stainless steel nut of the Air Server Link Tube to the SAMPLE OUT point of the dryer. Secure the 1/8 fitting with a 7/16 spanner while tightening. Warning: Rotating the 1/8 fitting on the Nafion dryer will damage the membrane and cause leaks damage caused by ignoring this warning will not be covered by warranty Note: the Purge In connection remains unaffected by the installation of the dryer. The dryer requires a pressure regulated supply (~15 psi) of around 200 ml/min dry air or nitrogen (can be adjusted once the software is loaded by clicking the dryer checkbox). The dry gas supply should be connected to the dryer as shown using the 1/8 copper tubing provided. SAMPLE OUT Attach dry air / nitrogen here DRYER Adjust flow here QUI-1049 Air Server Series 2 Installation Manual 9
2. Loading the UNITY 2 Air Server software The minimum PC specifications required for UNITY 2 - Air Server operation are the same as those required for UNITY 2 alone (see the UNITY 2 installation manual Section 1.1). The software should be installed from the CD, see UNITY 2 installation manual Section 2.5. 2.1. Configuring the Software With the UNITY-Air Server switched off, start the software either by double clicking the shortcut icon placed on the desktop or from Start > Programs. When the UNITY is not detected choose Select Options? This will bring up the Configuration page. Set the Instrument Configuration to Air Server (Series 2)-UNITY and the number of channels to 3 or 8 depending upon the Air Server configuration. Having setup the instrument configuration click OK, and when prompted by the following message choose Yes to close the software allowing any changes to take effect. QUI-1049 Air Server Series 2 Installation Manual 10
2.2. Switching on Ensure that the gas supplies to the system - especially the dry air or nitrogen purge gas used for UNITY valve actuation and purging the cold trap box - are on. Switch on the UNITY and CIA 8, using the switches located on the back panels of UNITY and CIA 8 respectively. Re-start the software. If communications between the PC and the instruments are established successfully the software will open. 2.3. MFC setup Upon first start-up of the software the following MFC configuration message will be displayed. Click Yes to go through to the Gas Flow tab to configure the MFCs following the procedure set out below. QUI-1049 Air Server Series 2 Installation Manual 11
Click Scan for Flow Controllers. Designate the flows to the MFC(s). One MFC UNITY Split & Trap Two MFCs UNITY Split & UNITY Trap Note: When 2 MFCs are present the MFC located inside the Air Server should be assigned to UNITY Trap. Restart the software. Setting Needle Valves It is important to adjust the needle valves to allow the correct flow to the MFC(s). This can be done once the software is downloaded. Ideally this should be at least 10 20 ml/min above the maximum flow used during the UNITY 2 run. 3. Calibrating the MFC The MFC must be calibrated prior to use to ensure the correct flow is reported. This should be carried out by a trained engineer. NOTE: If the Air Server module was factory installed the MFC will already be calibrated. QUI-1049 Air Server Series 2 Installation Manual 12
Enter diagnostics using the appropriate password and go to the Flow Calibrate tab. The MFC(s) detected and assigned in Section 2.3 will have values present in the Zone Offset and Scale Factor box. The correct Zone Offset and Scale Factor for the MFC is provided on a label attached to the MFC. To enter the values click on Mode to highlight the Zone Offset and Scale Factor boxes and type in the values. QUI-1049 Air Server Series 2 Installation Manual 13
4. Disconnecting Air Server (to run tube based methods) In order to run tube based methods on UNITY 2 the Air Server Link Tube must be disconnected from UNITY 2 Lift the left hand lever mechanism of the UNITY 2 tube oven to unseal the link tube from the flow path. Disconnect the link tube from Air Server and store in a safe place. Re-configure the software configuration to remove Air Server from the sampling options by selecting View, Options and click on the Configurations tab. In the Instrument Configuration change from Air Server (Series 2)-UNITY to UNITY (Manual), then click OK. The software will shut down to effect the changes Re-configure the physical MFC setup as shown below (if the system has 2 MFCs on UNITY 2 then no re-configuration is required). MFC in AS MFC in AS One MFC with Air Server connected One MFC with Air Server disconnected QUI-1049 Air Server Series 2 Installation Manual 14