Agilent 7890 Gas Chromatograph - Site Preparation Checklist

Agilent CrossLab Start-Up Services 
Agilent 7890 Gas Chromatograph 
Site Preparation Checklist 

Thank you for purchasing an instrument from Agilent Technologies. CrossLab Start-Up is focused on 
helping customers shorten the time it takes to start realizing the full value of their instrument investment. 
Installation, Introduction, and First Run Assist are service engagements to get your new instrument and 
lab productive. Success starts here. 
 
Correct site preparation is the key first step in ensuring that your instruments and software systems 
operate reliably over an extended lifetime. This document is an information guide and checklist prepared 
for you and outlines the supplies, space, and utility requirements for your equipment.   
 

Agilent 7890 GC Site Preparation Checklist 

Revision: 2.00, Issued: December 30, 2020   
Agile Document Number: D0007064 
DE number: 44166.7581597222                                                       Page    ____    of    ____      
© Agilent Technologies, Inc. 2020 
 

Introduction 

Customer Responsibilities 

Ensure that your site meets the following specifications before the installation date. For details, see specific 
sections within this checklist, including: 



The necessary laboratory or bench space is available. 



The environmental conditions for the site as well as laboratory gases, plumbing and extraction. 



The power requirements related to the product (e.g. number and location of electrical outlets). 



The required operating supplies necessary for the product and installation. 



If Agilent is delivering Installation and Introduction services, users of the instrument should be present 
throughout these services. Otherwise, they will miss important operational, maintenance, and safety 
information. 



For more detailed Site Preparation information Consult the Agilent 7890 Gas Chromatograph Site 
Preparation Guide. 



Please consult the Special Requirements section for other product-specific information. 



When using hydrogen (H2) as the carrier gas or fuel gas, be aware that hydrogen gas can flow into the GC oven 
and create an explosion hazard. Therefore, be sure that the supply is turned off until all connections are made 
and ensure that the inlet and detector column fittings are always either connected to a column or capped when 
hydrogen gas is supplied to the instrument.  

 
Hydrogen is flammable. Leaks, when confined in an enclosed space, may create a fire or explosion hazard. In any 
application using hydrogen, leak test all connections, lines, and valves before operating the instrument. Always turn 
off the hydrogen supply at its source before working on the instrument.  

Please refer to the Hydrogen Safety Guide which is shipped with the Instrument.  
 
 
 

Customer Information 



If you have questions or problems in providing anything described as a Customer Responsibility, please 
contact your local Agilent or partner support service organization for assistance before the scheduled 
installation. In addition, Agilent and/or its partners reserve the right to reschedule the installation 
dependent upon the readiness of your site. 



Should your site not be ready for whatever reasons, please contact Agilent as soon as possible to re-
arrange any services that have been purchased. 



Other optional services such as extra training, compliance services and consultation for user-specific 
applications may also be provided at the time of installation. Please discuss with your Agilent Sales 
representative before the installation is scheduled. 



Please refer to the other products (i.e.; GC, ALS, CTC, etc.) for site preparation requirements. 

Agilent 7890 GC Site Preparation Checklist 

Revision: 2.00, Issued: December 30, 2020   
Agile Document Number: D0007064 
DE number: 44166.7581597222                                                       Page    ____    of    ____      
© Agilent Technologies, Inc. 2020 
 

Important Customer Web Links 

  For more information about Agilent Technologies Services, please visit our website using the following URL: 

http://www.agilent.com/en-us/products/crosslab-instrument-services/service-repair 

  The Agilent Community is an excellent place to get answers, collaborate with others about applications and 

Agilent products, and find in-depth documents and videos relevant to Agilent technologies. Visit 
https://community.agilent.com/welcome 

  To access Agilent University, visit http://www.agilent.com/crosslab/university/ to learn about training options, 

which include online, classroom and onsite delivery. A training specialist can work directly with you to help 
determine your best options. Please visit Agilent University Learning Paths for education options for your GC 
and GC/MS instrumentation.     

https://inter.viewcentral.com/events/cust/cust_tracks.aspx?cid=agilent&pid=1&lid=1&track_id=34 
 

  A useful Agilent Resource Center web page is available, which includes short videos on maintenance, quick 

lists of consumables for new instruments, and other valuable information. Check out the Resource Page here: 
https://www.agilent.com/en-us/agilentresources 

  Need technical support, FAQs, supplies? – visit our Support Home page 

http://www.agilent.com/search/support 

  Videos about specific preparation requirements for your instrument can be found by searching the Agilent 

YouTube channel at https://www.youtube.com/user/agilent 

  7890B Manuals are also available on Agilent.com: 

o

Safety 
https://www.agilent.com/cs/library/usermanuals/public/7890B_Safety.pdf 

o

Installation and First Startup 
https://www.agilent.com/cs/library/usermanuals/Public/7890B_Installation.pdf 

o

Operation Manual 
https://www.agilent.com/cs/library/usermanuals/Public/7890B_Operation.pdf 

o

Maintaining Your GC 
https://www.agilent.com/cs/library/usermanuals/public/G3430-
90052%207890B_Maintaining%20Guide.pdf 

Special notes

Download the Essential Chromatography and Spectroscopy Supplies Catalogs for a complete overview 
about available supplies for your new and existing Agilent Instruments https://www.agilent.com/en-
us/products/lab-supplies 

Agilent 7890 GC Site Preparation Checklist 

Revision: 2.00, Issued: December 30, 2020   
Agile Document Number: D0007064 
DE number: 44166.7581597222                                                       Page    ____    of    ____      
© Agilent Technologies, Inc. 2020 
 

Site Preparation 

Dimensions and Weight 

Identify the laboratory bench space before your instrument arrives based on the following table. 

Pay special attention to the total height and total weight requirements for all system components you have 
ordered and avoid bench space with overhanging shelves. 

Special notes 



Allow at least 25 cm clearance between back of GC and wall to dissipate heated air. See picture 
below. A simple system that includes a GC and a computer requires about 86 cm of bench space. 



Avoid bench space with overhanging shelves. A 7683 or 7693 automatic liquid sampler will add to the 
height of the instrument as shown below. 



G1888A Headspace, 5977 GCMS and QQQ MS are installed to the left of the 7890 and the 7697 
Headspace and 220/240 Ion Trap MS are installed to the right. Refer to the "Dimensions and 
Weight" section of the "Agilent GC, GC/MS, and ALS Site Preparation Guide" for more detail. 
 

Instrument Dimensions 
 

        Component 

Height cm (in) 

Width cm (in) 

Depth cm (in) 

Weight kg (lb) 

Agilent 7890 GC 

50 cm (19 in) 

59 cm (23 in) 

54 cm (21 in) 

50 kg (112 lb) 

7890 with 3rd detector 

50 cm (19 in) 

68 cm (27 in) 

54 cm (21 in) 

57 kg (125 lb) 

7683 Auto-injector 

42 cm above GC 

(16.5 in) 

3.1 kg (7 lb) 

7683 Tray 

30 cm Left of GC 

(12 in) 

3.0 kg (7 lb) 

7693 Auto-injector 

50 cm above GC 

(20 in) 

3.9 kg (9 lb) 

7693 Tray 

45 cm Left of GC 

(18 in) 

2 cm (1 in) in front of 

GC 

6.8 kg (15 lb) 

Agilent 7890 GC Site Preparation Checklist 

Revision: 2.00, Issued: December 30, 2020   
Agile Document Number: D0007064 
DE number: 44166.7581597222                                                       Page    ____    of    ____      
© Agilent Technologies, Inc. 2020 
 

Environmental Conditions 

Operating your instrument within the recommended temperature ranges ensures optimum instrument 
performance and lifetime. 

  Performance can be affected by sources of heat & cold e.g. direct sunlight, heating/cooling from air 

conditioning outlets, drafts and/or vibrations. 

  The site’s ambient temperature conditions must be stable for optimum performance. 
  For storage or shipping, the allowable temperature range is -40 to 70 C and the allowable humidity 

range is 5-95%, non-condensing. After exposing the GC to extremes of temperature or humidity, 
allow 2 hours for it to return to the recommended ranges. 

  Refer to the "Environmental Conditions" section of the "Agilent GC, GC/MS, and ALS Site 

Preparation Guide" for more detail. 

Instrument description 

Operating temperature 

range °C (F) 

Operating humidity 

range (%) 

Heat dissipation 

(BTU) 

7890 Series GC 

15 to 35 °C (59 to 95 °F) 

5 to 95% 

7681 

7890 Series GC (Fast ramp 
oven) 

15 to 35 °C 

5 to 95% 

10,071 

Agilent 7890 GC Site Preparation Checklist 

Revision: 2.00, Issued: December 30, 2020   
Agile Document Number: D0007064 
DE number: 44166.7581597222                                                       Page    ____    of    ____      
© Agilent Technologies, Inc. 2020 
 

Heat Dissipation 

Your facilities manager may wish to know the amount of heat that the system generates in order to 
establish its contribution to the overall room ventilation requirements. 

The following table may help you calculate the additional BTU’s of heat dissipation from this new 
equipment. Maximums represent the heat given off when heated zones are set for maximum 
temperatures. 

Refer to the "Heat Dissipation" section of the " Agilent 7890 Gas Chromatograph Site Preparation Guide " for 
more detail. 

Oven type 

Heat dissipation 

Standard oven ramp 

7,681 BTU / hour maximum 

Fast oven ramp (options 002 and 003) 

10,071 BTU / hour maximum 

 
Venting the Oven - Oven Heat Deflector Option 306 or Part Number G1530-80650 
 

Below is a picture that shows the back view of an installed 7890 GC - with the Oven Heat Deflector installed. 
The exhaust duct is 10 cm (4 inches) in diameter and adds 14 cm (5.5 inches) to the back of the GC. 

The connecting duct should provide unrestricted flow for the oven air and be as short and straight as 
possible. 

With the exhaust deflector installed the exhaust is about 65 CFM (ft3/min /1.840 m3/min). Without the 
deflector, the exhaust rate is about 99 CFM (ft3/min /2.8 m3/min). 

Refer to the "Exhaust Venting" section of the "Agilent GC, GC/MS, and ALS Site Preparation Guide" for more 
detail. 

Agilent 7890 GC Site Preparation Checklist 

Revision: 2.00, Issued: December 30, 2020   
Agile Document Number: D0007064 
DE number: 44166.7581597222                                                       Page    ____    of    ____      
© Agilent Technologies, Inc. 2020 
 

Venting the uECD, TCD or Split-Splitless Inlet Vent gas flows to a Fume Hood or 
venting manifold

If using hydrogen carrier gas with either a micro Electron Capture (uECD) or Thermal Conductivity (TCD) 
Detector the GC will vent uncombusted hydrogen from the detector exit. In addition, if a Split/Splitless or 
Multimode Inlet is used, hydrogen will dissipate from both the inlet split and septum purge vents. In both 
cases you must either safely vent the exhaust gas or operate the GC inside a fume hood. 

The uECD exhaust vents through a stainless-steel tube, connected to a length of large I.D. tubing that exits the 
back panel. This should be routed to a fume hood or appropriate venting system. Agilent Technologies 
recommends a vent line internal diameter of 6 mm (1/4-inch) or greater. With a line of this diameter, the length is 
not critical. Make sure that the venting system does not put a direct negative pressure on the vent tube from the 
GC. 

Below is a picture that shows the back view of a 7890 GC with the micro Electron Capture Detector vent tube 
exiting the back of the instrument. 

Agilent 7890 GC Site Preparation Checklist 

Revision: 2.00, Issued: December 30, 2020   
Agile Document Number: D0007064 
DE number: 44166.7581597222                                                       Page    ____    of    ____      
© Agilent Technologies, Inc. 2020 
 

 
Power Requirements 

The GC power consumption and requirements depend on the type of oven that you ordered and the country the 
unit is shipping to. 

The following table Lists the AC Power requirements for various 7890 GC configurations: 

      Instrument Description 

Line Voltage and 

Frequency (V, Hz) 

Maximum Power 
Consumption (VA) 

Power Outlet Current 
Rating 

7890 Series GC (Standard Oven) 

Americas: 120 VAC single 
phase (+/–10%) 48 - 63 Hz 

2250 

20 amp dedicated 

7890 Series GC (Standard Oven) 

220/230/240 VAC 

single/split phase  
(+/–10%) 48 - 63 Hz 

2250 

10 amp dedicated 

7890 Series GC (Fast ramp oven) 

220/230/240 VAC 

single/split phase  
(+/–10%) 48 - 63 Hz 

2950 

15 amp dedicated 

7890 Series GC (Fast ramp oven) 

North America 240 VAC – 
Instrument option #002 

208 VAC requires 220 VAC 
Instrument option # 003 

2950 

15 amp dedicated 

 
 7890 Series GC (Fast ramp oven) 

Japan 200 VAC split phase 
(+/–10%) 48 - 63 Hz 

2950 

15 amp dedicated 

 
Notes 

  The number and type of electrical outlets depends on the size and complexity of your system. For 

example, in addition to the dedicated outlet for the GC, a system with a computer, monitor, printer, and 
HUB/Switch requires 4 additional  outlets on a separate circuit. 

  The outlet for the GC must be dedicated to the GC with a dedicated ground. 
  The GC will have a label next to the power cord connector that describes the line voltage requirements. 

  Option 003 is for any Country with standard 120/240 VAC to accommodate 208 VAC Power. 
  Power line conditioners that contribute any power line distortion should not be used with the Agilent 

7890 GC. 

  Refer to the "Power Consumption" section of the "Agilent GC, GC/MS, and ALS Site Preparation Guide" 

for more detail. 

  It is important to measure the line voltage at the receptacle for the GC to insure compatibility with 

the power configuration of the GC. 

Agilent 7890 GC Site Preparation Checklist 

Revision: 2.00, Issued: December 30, 2020   
Agile Document Number: D0007064 
DE number: 44166.7581597222                                                       Page    ____    of    ____      
© Agilent Technologies, Inc. 2020 
 

25B 

7890 Power Cords 

Refer to the "Power Consumption" section - "Common Instrument Power Cord Plugs" - of the 
"Agilent GC, GC/MS, and ALS Site Preparation Guide" for more detail. 

Part 
Number 

Country 

Voltage Amps Length-m  Type 

Wall 
Termination 

Plug Termination 

8121‐0675 Argentina 

240  16  4.5  C19  AS 

3112 

8120‐1369 

Australia, 
New Zealand 

240 10  2.5  C13  AS 

3112 

8120‐8619 Australia 

240  16  2.5  C19  AS 

3112 

8121‐1787 Brazil 

240  16  2.5  C19  IEC 

60906‐1  

8121‐1809 Brazil 

240  10  2.5  C13  IEC 

60906‐1  

8120‐6978 Chile 

240  10  2.5  C13  CEI 

23‐16  

8121‐0070 China 

220  16  2.5  C19  GB 1002 

8121‐0723 China 

220  10  2.5  C13  GB 1002 

Agilent 7890 GC Site Preparation Checklist 

Revision: 2.00, Issued: December 30, 2020   
Agile Document Number: D0007064 
DE number: 44166.7581597222                                                       Page    ____    of    ____      
© Agilent Technologies, Inc. 2020 
 

Part 
Number 

Country 

Voltage Amps Length-m  Type 

Wall 
Termination 

Plug Termination 

8120‐3997 Denmark, 

Greenland 

230 10  2.5  C13  AFSNIT 

107-2-

01 

8120-8622 

Denmark, 
Switzerland 

230 16  2.5  C19  Swiss/Denmark 

1302 

8120‐8621 Europe 

220/ 16  2.5  C19 
230/ 
240 

CEE/7/V11  

8121‐1222 Korea 

220/ 16  2.5  C19 
230/ 
240 

CEE/7/V11  

8121‐1226 Korea 

220/ 16  2.5  C13 
230/ 
240 

CEE/7/V11  

8121‐0710 India, 

South Africa 

240 15  2.5  C19  AS 

3112 

8120‐5182 Israel 

230  10  2.5  C13  Israeli 

SI32 

8120‐0161 Israel 

230  16,16 2.5  C19 
               AWG 
 

Israeli SI32 

8120‐6903 Japan 

200  20  4.5  C19  NEMA L6‐20P 

Agilent 7890 GC Site Preparation Checklist 

Revision: 2.00, Issued: December 30, 2020   
Agile Document Number: D0007064 
DE number: 44166.7581597222                                                       Page    ____    of    ____      
© Agilent Technologies, Inc. 2020 
 

Part 
Number 

Country 

Voltage Amps Length-m  Type 

Wall 
Termination 

Plug Termination 

8120‐8620 

United Kingdom, 

Hong Kong, 

Singapore, 

Malaysia 

240 13  2.5  C19  BS1363/A 

8120‐8705 

United Kingdom, 

Hong Kong, 

Singapore, 

Malaysia 

240 10  2.3  C19  BS1363/A 

8120‐6894 North 

America 

Canada, Mexico, 
Untied States 

120 20  2.5  C19  NEMA 5‐20P 

8121‐0075 North 

America 

Canada, Mexico, 
Untied States 

240 15  2.5  C19 
(Option 002) 
Also for 208 VAC Power – the 
GC is configured for 220 VAC 
(Option 003) 

NEMA L6‐15P 
 

8120‐6360 

Taiwan,  
South America 
 

120 20  2.5  C19  NEMA 5‐20P 

8121‐1301 Thailand 

220  15  1.8  C19   

Agilent 7890 GC Site Preparation Checklist 

Revision: 2.00, Issued: December 30, 2020   
Agile Document Number: D0007064 
DE number: 44166.7581597222                                                       Page    ____    of    ____      
© Agilent Technologies, Inc. 2020 
 

        Gas Selection 

  Refer to the "Gas and Reagent Selection" section in the "Agilent GC, GC/MS and ALS Site 

Preparation Guide" for more detail. 

  Agilent recommends a carrier and detector gas purity of 99.9995% or better. Air for flame detectors 

should be zero grade. Agilent also recommends using traps to remove hydrocarbons, water, and 
oxygen. 

  When used with capillary columns, GC detectors require a separate makeup gas for optimum sensitivity. 

This table lists gas recommendations for capillary columns and the preferred makeup gas types. 

  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%. 

o

Volatiles inlet VI is calibrated for only Helium and Hydrogen. 

  For GC/MS requirements, refer to the "GC/MS Gas and Reagent Requirements" section in the 

"Agilent GC, GC/MS and ALS Site Preparation Guide" 

Detector 

Carrier gas 

Make up 

1st choice 

Make up 

2nd choice 

Purge or reference 

Electron capture 

Hydrogen 
Helium Nitrogen 
Argon/methane 
5% 

Nitrogen 
Nitrogen 
Nitrogen 
Argon/methane 5% 

Argon/methane 5%  

Argon/methane 5% 

Anode purge is 
automatically the 
same as the makeup-
no gas connection at 
the back of the GC 

Flame 
ionization 

Hydrogen Helium 
Nitrogen 

Nitrogen 
Nitrogen 
Nitrogen 

Helium 
Helium  

Hydrogen and air for 

detector 

Flame 
photometric 

Hydrogen 
Helium 
Nitrogen  

Nitrogen 
Nitrogen 
Nitrogen 
 

None 

Hydrogen and air for 

detector 

Nitrogen 
phosphorous 

Helium Nitrogen 

Nitrogen Nitrogen 

Helium  

Hydrogen and air for 

detector 

Thermal 
conductivity 

Hydrogen Helium 
Nitrogen 

Must be same as 
carrier and reference 

Must be same as carrier 
and reference 

Reference must be 
same as carrier and 
makeup 

Agilent 7890 GC Site Preparation Checklist 

Revision: 2.00, Issued: December 30, 2020   
Agile Document Number: D0007064 
DE number: 44166.7581597222                                                       Page    ____    of    ____      
© Agilent Technologies, Inc. 2020 
 

 
Gas Supply Pressures 
 

  Refer to the "General Requirements" section under "Gas Supplies" in the "Agilent GC, GC/MS and ALS 

Site Preparation Guide" for more detail. 

  The following tables list minimum and maximum pressures in psi for each electronic pneumatic 

control module (EPC). These requirements are for the input to the EPC module located at the back of 
the gas chromatograph. Conversions: 1 psi = 6.8947 kPa = 0.068947 Bar = 0.068 ATM. 

Detectors 

FID 

NPD 

TCD 

ECD 

FPD 

Hydrogen pressure (psi) 

35-100 

35-100 

45-100 

Air pressure (psi) 

55-100 

55-100 

100-120 

Make up pressure (psi) 

55-100 

55-100 

55-100 

55-100 

55-100 

Reference pressure (psi) 

55-100 

Auxiliary EPC and Pneumatic control Channels 

The minimum supply pressure for AUX and PCM modules is 20 psi greater than pressure used in your 
method. For example, if you need a pressure of 20 psi for the method, the supply pressure must be at least 40 
psi. 

AUX EPC 

PCM 1 

PCM 2 or PCM Aux 

Maximum 
pressure (psi) 

120 120 

120 with Forward pressure control  

50 with Back pressure control 

Inlets 

The minimum supply pressure for inlet modules is 20 psi greater than pressure used in your method. For 
example, if you need a pressure of 40 psi for the method, the supply pressure must be at least 60 psi. 

SSL 150 

SSL 100 

MMI 

PPIP 

PCOC 

PTV 

Carrier max (psi) 

170 

120 

170 

120 

120 

120 

Agilent 7890 GC Site Preparation Checklist 

Revision: 2.00, Issued: December 30, 2020   
Agile Document Number: D0007064 
DE number: 44166.7581597222                                                       Page    ____    of    ____      
© Agilent Technologies, Inc. 2020 
 

      Gas and Plumbing Supplies 

1.  Refer to the "Gas Plumbing" section in the "Agilent GC, GC/MS and ALS Site Preparation Guide" for 

more detail. 

2.  Gases are supplied by tanks, internal distribution system, or gas generators. Tank supplies require two 

stage, pressure regulation. To connect tubing to the supply, it must have one 1/8-inch Swagelok  female 
connector for each gas. Make sure that your regulator has the appropriately sized adapter to end with a 
1/8-inch Swagelok  female connector. 

3.  If your order did NOT include parts to connect the gas supply to your 7890 GC, you must supply pre-

cleaned, 1/8-inch copper tubing and a variety of 1/8-inch Swagelok  fittings to connect the gas 
supply(s). Refer to the "GC Installation Kits" and "GC Plumbing" sections of this checklist for Part 
Numbers. 

4.  Never use liquid thread sealer to connect fittings. Never use chlorinated solvents to clean tubing 

or fittings. 

5.  Agilent also recommends using traps to remove water, hydrocarbons, and oxygen or a 

combination trap such as the "Gas Clean" Filter System that removes all three. 

Special Notes 

1.  Shutoff Valves are recommended at both front and back Inlet Carrier Connections 
2.  FID, FPD and NPD need dedicated detector air supply 
3.  For Gas supply runs longer than 15 feet, use 1/4-inch tubing to prevent pressure drop 
4.  Do not reuse old copper tubing which can become brittle and break 

Gas Clean Filter Configurations 

Agilent 7890 GC Site Preparation Checklist 

Revision: 2.00, Issued: December 30, 2020   
Agile Document Number: D0007064 
DE number: 44166.7581597222                                                       Page    ____    of    ____      
© Agilent Technologies, Inc. 2020 
 

Refer to the "Gas Plumbing/Filters and Traps" section of the "Agilent GC, GC/MS, and ALS Site Preparation Guide" 
for more detail. Another good resource is the "Agilent Gas Clean Filter System User Manual" - 
http://www.chem.agilent.com/Library/usermanuals/Public/GasCleanFilter_5973-1528.pdf 

Available GC Pressure regulators:  
 
All Agilent regulators are supplied with the 1/8-inch SwagelokÒ female connector. 

Gas Type 

CGA Number 

Pressure Range 

Part Number 

Air (medical grade) 

346 

0-125 PSIG (8.6 Bar) 

5183-4641 

Hydrogen, Argon/Methane 

350 

0-125 PSIG (8.6 Bar) 

5183-4642 

Oxygen 

540 

0-125 PSIG (8.6 Bar) 

5183-4643 

Helium, Argon, Nitrogen 

580 

0-125 PSIG (8.6 Bar) 

5183-4644 

Air (Zero grade, for GC 
applications) 

590 

0-125 PSIG (8.6 Bar) 

5183-4645 

Common Plumbing Supplies 

Recommended Supplies to make the GC system installation go smoother. 

Description 

Part Number 

1/8-inch Copper Tubing - pre-washed - 50 feet 

5180-4196 

1/8-inch thick wall Stainless Steel Tubing - 20 Feet 

7157-0210 

1/8-inch Ball Shutoff Valve for Carrier Gas Supplies (order 1 for each inlet system) 

0100-2144 

PTFE tape (Never use liquid thread sealer to connect fittings.) 

0460-1266 

Miscellaneous Gas Plumbing Information 

1.  Cryogenic cooling with Liquid N2 requires 1/4-inch insulated copper tubing – 25-30 PSI supply. 
2.  Cryogenic cooling with Liquid CO2 requires 1/8-inch heavy-walled, stainless steel tubing – 750-

1000 PSI supply – tank with dip (syphon) tube. 

3.  Cryogenic Liquid CO2 coolant must be free of particulate material, oil, and other contaminants - A 2 

micron particulate filter is provided with the Liquid CO2 Cryogenic cooling accessories. 

4.  Internal Valco  rotary Valve actuation requires a separate pressurized, dry air at 55 psi. 
5.  If you have not requested option 305 (pre-plumbed GC), you must supply pre-cleaned, 1/8-inch copper 

tubing and a variety of 1/8-inch Swagelok  fittings to connect the GC to inlet and detector gas supplies. 

 
 
Considerations for Hydrogen Carrier Gas 

Agilent 7890 GC Site Preparation Checklist 

Revision: 2.00, Issued: December 30, 2020   
Agile Document Number: D0007064 
DE number: 44166.7581597222                                                       Page    ____    of    ____      
© Agilent Technologies, Inc. 2020 
 

If planning to use hydrogen carrier gas, note that special considerations apply due to hydrogen’s flammability and 
chromatographic properties. Refer to the to the "Gas Supplies/Requirements for Hydrogen as a Carrier Gas" section 
in the "Agilent GC, GC/MS and ALS Site Preparation Guide" for more detail. 

Hydrogen Safety 
When using hydrogen as the carrier gas or fuel gas, be aware that hydrogen gas can flow into the GC oven and 
create an explosion hazard. Therefore, be sure that the Hydrogen gas supply is turned off until all connections are 
made and ensure the inlet and detector column fittings are either connected to a column or capped at all times 
when hydrogen gas is supplied to the instrument. 
In any application using hydrogen, leak test all connections, lines, and valves before operating the instrument. 
Agilent highly recommends the G3388B Leak Detector or equivalent to safely check for leaks. 

Supply tubing for Hydrogen Gas 

Agilent recommends using NEW, chromatographic quality copper or stainless steel tubing and fittings when 
using hydrogen. 

Do not re-use old tubing when installing or switching to hydrogen carrier gas. Hydrogen gas tends to remove 
contaminants left on old tubing by previous gases (by helium, for example). 

These contaminants can appear in detector output as high background noise or hydrocarbon 
contamination for several weeks. 

Do not use old copper tubing with hydrogen gas. Old copper tubing can become brittle and create a safety 
hazard. 

Hydrogen Gas Supplies 

Hydrogen can be supplied from a gas generator or from a cylinder. 

Agilent recommends use of a high-quality hydrogen gas generator. A high-quality generator can consistently 
produce purity > 99.9999%, and the generator can include built-in safety features such as limited flow rates, 
and auto-shutdown. 

If using a hydrogen gas cylinder, Agilent recommends use of Gas Clean Filters to purify the gas. Consider 
additional safety equipment as recommended by your company safety personnel. 

Agilent 7890 GC Site Preparation Checklist 

Revision: 2.00, Issued: December 30, 2020   
Agile Document Number: D0007064 
DE number: 44166.7581597222                                                       Page    ____    of    ____      
© Agilent Technologies, Inc. 2020 
 

GC Installation Kits 
Pre-configured kits to make the GC system installation go smoother. 
All kits include two shutoff valves – one for each inlet carrier supply. 
 

Description

Part Number 

Installation Kit for FID/NPD/FPD (Includes Gas Clean Filter Kit CP736538) for 
Moisture, O2 and Hydrocarbon removal.

19199N 

Installation Kit for TCD/ECD/MSD - no Gas Filters Included - order separately for 

ECD - Gas Clean Filter is included with MSD.

19199M 

Available Kits for 7890 GC system installation: 
 

Kit 

Part number 

Gas Clean carrier gas filter kit, 1/8-inch 

           CP17974 

Agilent 7890 GC Site Preparation Checklist 

Revision: 2.00, Issued: December 30, 2020   
Agile Document Number: D0007064 
DE number: 44166.7581597222                                                       Page    ____    of    ____      
© Agilent Technologies, Inc. 2020 
 

Other Requirements 

Your Agilent 7890 GC comes with an analytical column: 19091J-413 (HP5, 30 meter, 0.32mm x 0.25µm). Our 
checkout standards are designed to work with this column. In many cases, you will need to select a different 
column for your application. For information on GC Column Selection, refer to:  

http://www.agilent.com/cs/library/catalogs/Public/5990-9867EN_GC_CSG.pdf 

Tools and Consumables Supplied with your GC 
 

Tool or consumable 

Used For 

Inlet wrench for Turn Top - Split/Splitless and 
Multimode Inlets only 

Replacing inlet septa and liners 

¼-inch nut driver - FID Only 

FID/NPD jet replacement 

¼-inch X 5/16 inch wrenches 

Column Installation 

FID flow measuring insert 

FID troubleshooting 

Ceramic wafer column cutter 

Column installation 

1/8-inch nuts & ferrules, Swagelok, brass 

Connect gas supplies 

Inlet septa appropriate for type 

Injection port seal 

Inlet insert or liner 

Injection port 

Capillary Column Ferrules - Graphite 

Column installation 

2 Capillary Column Nuts 

Column installation 

2 Column Hangers 

Column installation 

Gas ID Labels 

For Labeling Gas Supply Tubing to Inlets and 
Detectors 

LAN Cable 

Communication to the GC 

Agilent 7890 GC Site Preparation Checklist 

Revision: 2.00, Issued: December 30, 2020   
Agile Document Number: D0007064 
DE number: 44166.7581597222                                                       Page    ____    of    ____      
© Agilent Technologies, Inc. 2020 
 

Recommended Tools for Maintenance 
 

Tool 

Used For 

GC Tool Kit - 5182-3456 

Basic Tools in a zipper tool bag 
(Included with the Installation Kit Part Number 
19199M) 

ECD/TCD Detector plug, 5060-9055 

Inlet pressure decay test 

Digital flow meter 220-1170 

Verifying flows, checking for leaks and plugs 

Electronic gas leak detector - G3388B 

Pin pointing gas leaks. Safety checks when using 
Hydrogen. 

T10 Torx driver - 5182- 3466 

Remove FID Collector. Remove covers to access 
EPC modules, traps 

T20 Torx driver - 5182- 3465 

Replace NPD Bead. 

Tubing cutter for 1/8-inch Copper and 1/16-inch 
Stainless Steel. - 5190-1442 

Cut gas supply tubing 

Assorted wrenches: ¼, 3/8, 7/16, 9/16 inch 

Gas supply and plumbing fittings. 

Electric vial crimper - 5190-3188 

Assure consistently airtight vial closure no matter 
who does the crimping. 

Recommended Supplies for GC Maintenance 
 

First time GC users should consider stocking the following supplies to maintain their system. Please refer to the 
Agilent Consumables and Supplies Catalog for part numbers and recommended maintenance periods or visit  

http://www.chem.agilent.com/en-US/Promotions/pages/catalog.aspx 

Supply 

Used For 

Inlet supplies 

Septa, O-rings, liners, adapter and seals 

Inlet PM kits 

Kits with individual parts needed to maintain an inlet 

Column supplies 

Nuts, ferrules, adapters, guard columns, retention gaps 

Detector supplies 

Jets, beads, liners, adapters, cleaning kits 

Application supplies 

Standards, columns, syringes 

Sampler supplies 

Vials, caps, electronic crimpers, and syringes. 

Agilent 7890 GC Site Preparation Checklist 

Revision: 2.00, Issued: December 30, 2020   
Agile Document Number: D0007064 
DE number: 44166.7581597222                                                       Page    ____    of    ____      
© Agilent Technologies, Inc. 2020 
 

Autosampler Hardware from Older Systems 

If you previously purchased samplers and would like to use these on your new GC, the samplers may need 
firmware updates. Sampler models that are compatible include: 7683A and 7693A ALS; and 7694B and 
7697A Headspace Samplers. 

This information is subject to change. For more details on software and hardware compatibility, please 
contact your sales representative. 

 
Summary Checklist 
 
 

Use the following checklist to ensure that the site is properly prepared for GC system installation. 
 



Ensure that the appropriate installation hardware has been acquired. 



Ensure that the location in which the GC system is being installed meets the requirements for 
environmental conditions. 



Prepare bench space for the GC system. Ensure that the bench has the size and weight 
capacity to accommodate the GC and associated components. 



Ensure that system components are oriented so that they can be connected properly. 



If the system being installed includes an MSD, ensure that the bench allows for proper 
installation and connection of the fore-line pump. 



Ensure that appropriate venting is provided for the GC system. 



Ensure that a dedicated power circuit is available for each device in the system. 



Ensure that appropriate gas and reagent supplies are provided for the GC system. 



Ensure that appropriate gas plumbing is provided for the GC system. 



If the GC uses cryogenic cooling, ensure that appropriate cryogenic cooling supplies are provided 
for the GC. 



If the GC system being installed includes a data system, ensure that the PC meets the requirements 
necessary to properly support the GC system. For more information, see the site prep guide for your 
data system. 



If the GC being installed is to be connected to a site LAN, ensure that the appropriate cabling is 
available. 

Agilent 7890 GC Site Preparation Checklist 

Revision: 2.00, Issued: December 30, 2020   
Agile Document Number: D0007064 
DE number: 44166.7581597222                                                       Page    ____    of    ____      
© Agilent Technologies, Inc. 2020 
 

Service Engineer Review (Optional) 

Use this page to document a review of the Site Preparation requirements between the Customer and the Service 
Engineer. 

Service Engineer Comments  

Site Preparation Verification 

Service Order Number  _________________________________ 

Date of Site Prep Review _______________________________ 

Service Engineer Name ________________________________ 

If there are any specific points that should be noted as part of performing the site preparation review 
or other items of interest for the customer, please write in this box.