Carrier Gas Refill assembly manual
Contents
1. ELY HAZARDOUS Filling the tank can be done safely if the following steps are followed Refill procedure 1 Install Refill Assembly onto gas supply cylinder 2 Check and make sure that the valve on the Refill Assembly is closed 3 At the back of the Micro GC remove the 1 nut at the carrier gas refill port refer to the appropriate user manual 4 Connect the 1 tube from Refill Assembly to the refill port Finger tighten and loosen the nut 1 4 turn 5 First open the valve on gas supply cylinder then slightly open valve on Refill Assembly just a tiny little bit and listen for gas leaking through the nut This purges Refill Assembly so that no air enters the gas carrier gas cylinder 6 When refill assembly has been sufficiently purged tighten the refill port nut 7 While watching pressure gauge on refill assembly slightly open valve a little more When pressure on gauge reads 2009 Varian Inc All Rights Reserved Printed in the Netherlands 10000 to 12000 kPa close both valves on refill assembly and gas supply cylinder By that time it is possible that the relief valve may have started to blow this is normal The relief valve is meant to limit the pressure in the carrier gas cylinder 8 Disconnect tube from the refill nut Now escaping gas comes from the Refill assembly letting off pressure Cap off the refill port The carrier gas cylinder can only be filled to the maximum when the pressure in2. NOTICE This document contains references to Varian Please note that Varian Inc is now part of Agilent Technologies For more information go to www agilent com chem gy Agilent Technologies Carrier Gas Refill Assembly manual Micro GC field case CP 200X portable version and Quad systems Your Micro GC Field Case CP 200X portable version or Quad system is equipped with a refillable high pressure carrier supply tank s which has been approved to 12000 kPa and has an internal volume of 300 cc When the instrument is in use the pressure should not drop in the red area since all systems need at least 550 10 kPa 80 2 psi to working properly Refilling is done by means of a Carrier Gas Refill Assembly This special tool is connected directly to the valve on the gas supply cylinder Because this connection differs from country to country Varian Inc offers a range of Refill Assembly s to meet all major standards If the connector of this device despite a careful choice does not match your supply unit ask your local gas supplier for the right part It should have NPT male thread at the other end Exchanging is easy ae cen ini Connection to gas supply cylinder Connection to carrier fill port idi High pressure gas stores an incredible amount of energy and is dangerous in its own right even if the gas is inert like He or N2 However if caution is not practiced WARNING filling your tank can be EXTREM
3. at least twice don t close valve the last time but reconnect the removed tubing 12 While watching pressure gauge on refill assembly slightly open valve a little more When pressure on gauge reads 10000 to 12000 kPa close both valves on refill assembly and gas supply cylinder By that time it is possible that the relief valve may have started to blow this is normal The relief valve is meant to limit the pressure in the carrier gas cylinder 13 Disconnect 1 4 tube from the refill port Now escaping gas comes from the Refill assembly letting off pressure Cap off the refill port CP505278 Rev 04 November 2009
4. the gas supply cylinder has sufficient pressure to allow that If the gas supply pressure has WARNING dropped below the set point of the relief valve the gauge on the refill assembly will indicate this pressure when both valves are open Additional refill information In case the carrier supply cylinder depressurized completely and is possible contaminated with air proceed with the next steps 1 Install Refill Assembly onto gas supply cylinder 2 Check and make sure that the valve on Refill Assembly is closed 3 Close the carrier pressure valve at the Micro GC 4 Disconnect at the back of the Micro GC the tubing connecting the internal gas cylinder to the Micro GC carrier gas in port refer to the appropriate user manual 5 At the back of the Micro GC remove the nut at the refill port refer to the appropriate user manual 6 Connect the 1 tube from Refill Assembly to the refill port Finger tighten and loosen the nut 1 4 turn 7 First open the valve on gas supply cylinder then slightly open valve on Refill Assembly just a tiny little bit and listen for gas leaking through the nut This purges Refill Assembly so that no air enters the gas carrier gas cylinder 8 When refill assembly has been sufficiently purged tighten the refill port nut 9 Fill the carrier gas cylinder to about 1500 kPa 10 Turn carrier gas valve open relieve pressure in carrier gas cylinder and close valve 11 Purge this way
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