https://community.agilent.com/technical/gc/Support documents, technical questions, and discussions about the Agilent GC products.en-USTelligent Community 11https://community.agilent.com/technical/gc/f/forum/2406/recomended-flow-on-a-gc/12851#12851Tue, 20 Apr 2021 12:00:00 GMT91a5bd7e-f9af-4501-be6a-1b8760d0ca30:fa5acfc4-2a93-45fb-96ec-34b6e49868bcjames_jenkins Hi Michael1993, Deans switch can be a little more complicated. Take a look at this presentation and you will see healthy flows in all states of use. https://www.agilent.com/cs/library/eseminars/Public/Deans%20Switch%20060711.pdf Regards James https://community.agilent.com/technical/gc/f/forum/3542/gc-transfer-line-high-temperature-alarm/12820#12820Mon, 19 Apr 2021 00:48:00 GMT91a5bd7e-f9af-4501-be6a-1b8760d0ca30:fc0b6c43-b2fa-41ee-9378-1e18ca60ef30ishtiyaq Hi Either there is leak or loop is not filling properly with sample for low area. And for too hot transferline, may be PC board or sensor is malfunctioning or faulty of headspace. You can change column or trim the column from inlet and detector side. If you are using FID then you can clean jet or do FID maintenance. After this do injection and see area. If still problem persist then problem is from headspace side and has to check complete sample flow path of headspace to see which part is faulty. Like after equilibrium of vial, sample goes in loop and then by switching of valve, helium took sample from loop and goes to GC through transferline. So all these need to check. https://community.agilent.com/technical/gc/f/forum/3542/gc-transfer-line-high-temperature-alarmSat, 17 Apr 2021 19:55:00 GMT91a5bd7e-f9af-4501-be6a-1b8760d0ca30:a907cca8-b39b-4d1e-9846-10fb0d416a8bHanadyz Hello there. I encountered a problem in my GC HS 7964E twice. The instrument was on and ready for injection, but the transfer line was hot than usual, even more than the set temp. The actual temperature was reading ''--------'' (blank) and an error message was displayed; "High temperature alarm". It was extremely hot to the touch, and I disconnected it from the instrument and waited till it was cool, then I reconnected it. After that, I was trying to inject my samples, no peaks appeared at all, but peaks who are supposed to be of large areas appeared but with rather smaller areas. For example, DMSO whose area is supposed to be ''20000'' was found to be only ''300''! All other methods that I have in my lab were tried, but all of them were of the same results. My opinion is that there is a doubt that when the transfer line got too hot, some part melted or broken and it was plugged due to that extreme high temperature. Please advise. Thank you for your time. gc troubleshootinghttps://community.agilent.com/technical/gc/f/forum/3540/7697a-vials-leaking-error-using-empower-3/12817#12817Fri, 16 Apr 2021 19:27:00 GMT91a5bd7e-f9af-4501-be6a-1b8760d0ca30:6cbd01c8-8047-4279-bace-b0f93b438edeishtiyaq Hi You are using openlab chemstation or empower 3 for 7697a headspace. If empwer3 then you have to contact waters. https://community.agilent.com/technical/gc/f/forum/3540/7697a-vials-leaking-error-using-empower-3Fri, 16 Apr 2021 19:00:00 GMT91a5bd7e-f9af-4501-be6a-1b8760d0ca30:87a3d262-7d4c-4594-8ee9-d14188793656Seb99 I am having an issue regarding the pressurization of my vials. I am using 10 ml vial and cap from Agilent. Leak rate always higher than my limit. Seems to be a known driver error when reading in Waters forums. To fix that problem without drivers upgrade, they propose to set the Fill modes of my vials to Constant Volume. Any idea what volume should I use to perform pressurize my vials? https://community.agilent.com/technical/gc/f/forum/2406/recomended-flow-on-a-gc/12795#12795Thu, 15 Apr 2021 19:48:00 GMT91a5bd7e-f9af-4501-be6a-1b8760d0ca30:a339b16f-b133-4c8d-8c5a-56b306442f71Michael1993 appreciate this is 3 years old, but if youre still here, is this true for MSD with a deans switch? https://community.agilent.com/technical/gc/w/wiki/9958/collection-of-agilent-micro-gc-resourcesThu, 15 Apr 2021 14:03:00 GMT91a5bd7e-f9af-4501-be6a-1b8760d0ca30:a269a5b0-8041-43c9-827c-c00f5806c12fcduvekot Here is a collection of Agilent Micro GC Resources. Links to applications, manuals and tools on Agilent.com . Application References Agilent P/N Title 5994-1039EN Rapid analysis of mud logging well gas using the Agilent 990 Micro GC 5994-1040EN Fast Analysis of Natural Gas Using the Agilent 990 Micro GC Natural Gas Analyzer 5994-1041EN One-Minute Natural Gas Analysis Using the Agilent 990 Micro GC Backflush-to-Detector Option 5994-1042EN Analysis of Tetrahydrothiophene (THT) in Natural Gas Using the Agilent 990 Micro GC 5994-1043EN Refinery Gas Analysis Using the Agilent 990 Micro GC 5994-1044EN Sulfur Dioxide Analysis Using the Agilent 990 Micro GC 5994-1374EN Calculation of Natural Gas Calorific Value with the Agilent 990 PRO Micro GC System 5994-1375EN BTEX Analysis with the Agilent 990 Micro GC System 5994-1376EN Biogas Analyzer Based on the Agilent 990 Micro GC 5994-2138EN Hydrogen Impurity Analysis Using the Agilent 990 Micro GC 5994-2139EN Argon and Oxygen Analysis Using the Agilent 990 Micro GC 5994-2140EN Analysis of Impurities in Helium Using the Agilent 990 Micro GC 5994-2320EN CO2 Reduction Gas Products Analysis Using the Agilent 990 Micro GC 5994-2321EN The Analysis of Swelling Gas in Lithium-Ion Batteries with an Agilent 990 Micro GC 5994-2624EN Determination of Hydrocarbon Composition in Liquefied Petroleum Gas Using the Agilent GC Gasifier and the Agilent 990 Micro GC Manuals Agilent P/N Title Type G3588-90010 Agilent 990 Micro Gas Chromatograph User Manual G3588-90015 Agilent 990 Mobile Micro GC User Manual G3535-90000 Agilent 8860, 8890 and 990 Micro Gas Chromatograph Gasifier User Manual G3588-90000 Agilent 990 Micro GC and 990 Mobile Micro GC Safety Manual G3588-90012 Agilent Prostation Software for 990 Micro GC User Manual G3588-90029 Agilent 990 Micro GC PRO Extension Boards User Manual G3588-90002 Agilent 990 Micro Gas Chromatograph Site Prep Guide G3588-90011 Web User Interface for the Agilent 990 Micro GC including PRO and Mobile Licenses User Manual micro gcMicro GC User ManualsAgilent 990 Micro GCMicro GC Applications990 Micro GChttps://community.agilent.com/technical/gc/f/forum/3457/8355-scd-high-output/12776#12776Thu, 15 Apr 2021 07:57:00 GMT91a5bd7e-f9af-4501-be6a-1b8760d0ca30:4baede96-a0fd-4577-8a96-b1145cbbd1e0ishtiyaq Hi How old is column. SCD is very sensitive towards column bleed. Install any other column after conditioning then see baseline. https://community.agilent.com/technical/gc/f/forum/3527/als-on-8890---configuration/12764#12764Wed, 14 Apr 2021 19:13:00 GMT91a5bd7e-f9af-4501-be6a-1b8760d0ca30:562f7343-95dd-43ae-be4b-4ce0250c12f1Ting ALS works fine as Front Injector - wire and connection is not the issue. thanks https://community.agilent.com/technical/gc/f/forum/3527/als-on-8890---configuration/12763#12763Wed, 14 Apr 2021 19:11:00 GMT91a5bd7e-f9af-4501-be6a-1b8760d0ca30:00f85649-a978-4849-b572-33be3d8ef94eishtiyaq And also share pic of led light of ALS to understand the problem.. https://community.agilent.com/technical/gc/w/wikiWed, 14 Apr 2021 19:08:00 GMT91a5bd7e-f9af-4501-be6a-1b8760d0ca30:fbda0888-2e3e-441d-b745-10ee16a5f2cahttps://community.agilent.com/technical/gc/f/forum/3527/als-on-8890---configuration/12762#12762Wed, 14 Apr 2021 19:08:00 GMT91a5bd7e-f9af-4501-be6a-1b8760d0ca30:0440cf2f-b5f9-4109-9e22-62f9d5e1079bishtiyaq What you are finding in inlet in above pic..can you share pic after clicking inlet.. https://community.agilent.com/technical/gc/f/forum/3527/als-on-8890---configuration/12761#12761Wed, 14 Apr 2021 18:58:00 GMT91a5bd7e-f9af-4501-be6a-1b8760d0ca30:03d91c98-318a-421b-9d9d-1d6781b49172Ting ALS is stuck on Front Injector on the panel and on the GC. I need it to register as the Back Injector. Have tried both connections in the back, have rebooted multiple times - no success. In the 6890 - we were able to have the flexibility to choose Inj1 or Inj2 as front or back . I can't seem to find a way on these new fancy touch screens :) https://community.agilent.com/technical/gc/f/forum/3527/als-on-8890---configuration/12760#12760Wed, 14 Apr 2021 18:53:00 GMT91a5bd7e-f9af-4501-be6a-1b8760d0ca30:4dfb5d93-e134-42b4-a6b8-5470c2647d7eishtiyaq Can you check ALS Led is light up or not.If wire of ALS is connected properly with GC from back side then after restarting the instrument, ALS should show in setting then service mode then set up.. https://community.agilent.com/technical/gc/f/forum/3527/als-on-8890---configuration/12759#12759Wed, 14 Apr 2021 18:47:00 GMT91a5bd7e-f9af-4501-be6a-1b8760d0ca30:266b4998-7892-4b3d-9a92-a8422e34f221Ting Hi - thanks but there is no ALS option at the set up https://community.agilent.com/technical/gc/f/forum/2834/hi-i-m-having-trouble-with-a-signal-buffer-overflow-it-s-complicated-so-please-see-the-details/12756#12756Wed, 14 Apr 2021 18:19:00 GMT91a5bd7e-f9af-4501-be6a-1b8760d0ca30:e933c3a2-6e72-4332-a959-f9ecc30b3b62gcbill James, I hope this works, as I'm having trouble getting back in to the community. The problem ended up being a printer. It was printing sometimes and not others, and something about the printer buffer not accepting more information was the GC buffer to become full. All I had to do was remove the printer as the default, and everything worked fine. Best Regards Bill (Personal details removed by Moderator) "james_jenkins" ---04/14/2021 02:08:12 PM---[ http://www.agilent.com/ ] Agilent Community https://community.agilent.com/technical/gc/f/forum/2521/what-range-of-carrier-gases-is-possible/12755#12755Wed, 14 Apr 2021 18:14:00 GMT91a5bd7e-f9af-4501-be6a-1b8760d0ca30:1383a27c-02fb-4e5a-af57-ef103eca2d31james_jenkins Hi memfarmer, The inlet electronic pressure control (EPC) modules are calibrated for up to 4 carrier gases: Split/Splitless capillary (SS), Purged packed (PP), Programmable temperature vaporization (PTV), Multi-Mode (MM), and cool on-column (COC) are calibrated for Helium, Hydrogen, Nitrogen, and Argon methane 5%. Volatiles inlet VI is calibrated for only Helium and Hydrogen. The issues with non standard gases is complex, in GCMSD, anything with a mass higher than helium can block ionization, effectively a roadblock for signal. Regards James https://community.agilent.com/technical/gc/f/forum/3457/8355-scd-high-output/12754#12754Wed, 14 Apr 2021 17:55:00 GMT91a5bd7e-f9af-4501-be6a-1b8760d0ca30:160ccb3d-4c0e-4881-8ef3-2fea7bb1a707jmbrummett No, not yet. I called Agilent service for assistance but they never called me back. I thinking part of it has to do with the temperature program I have for my analysis method but the output is still high even when not running. I've changed the hydrogen and oxygen recently (the tanks last a long time) and that did not fix the issue. I've also changed the inner ceramic tube and that did not fix the issue either. There isn't much troubleshooting information available out there for this instrument which is kind of a bummer. https://community.agilent.com/technical/gc/f/forum/3457/8355-scd-high-output/12753#12753Wed, 14 Apr 2021 17:48:00 GMT91a5bd7e-f9af-4501-be6a-1b8760d0ca30:1b8f7254-9792-418a-834e-a3c606843ceejames_jenkins Hi jmbrummett, Were you able to resolve the issue? Regards James https://community.agilent.com/technical/gc/f/forum/3527/als-on-8890---configuration/12747#12747Wed, 14 Apr 2021 06:01:00 GMT91a5bd7e-f9af-4501-be6a-1b8760d0ca30:500ea776-8479-4f8b-bbac-f691b392c0abishtiyaq Hi, You can configure from touch screen by going in setting option.