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Agilent Technologies 990 User Manual

Micro gas chromatograph
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Micro Gas Chromatograph
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Summary of Contents for Agilent Technologies 990

  • Page 1 Agilent 990 Micro Gas Chromatograph User Manual...
  • Page 2 Notices Warranty Safety Notices © Agilent Technologies, Inc. 2022 No part of this manual may be reproduced in The material contained in this document is any form or by any means (including electronic provided “as is,” and is subject to being...

  • Page 3: Table Of Contents

    Power requirements Disposal Specifications Ambient Pressure Ambient Temperature Maximum Operation Altitude Storage requirements Micro GC Cycle with Constant Pressure Micro GC Cycle with Ramped Pressure 3 Installation and Use Pre-Installation Requirements Inspect the Shipping Packages Agilent 990 Micro GC User Manual...
  • Page 4 Step 4: Connect to computer or local network Step 5: Install the Chromatography Data System Step 6: Assign an IP address Step 7: Complete Agilent 990 Micro GC configuration in the Chromatography Data System Create the Test Method Perform a Series of Runs...
  • Page 5 Channel installation procedure 7 Replacement Procedures Removing the Covers Removing the front cover Removing the rear covers Sample Line Replacement Tools required Replacement procedure for Micro GC sample line RTS Filter Replacement Tools required Agilent 990 Micro GC User Manual...
  • Page 6 CP-Molsieve channel CP-PoraPLOT U channel CP Sil 5 CB channel Certificate of the Universal Gas Calibration Standard The Biogas Analyzer Method 11 Micro GC Natural Gas Analyzer Agilent 990 Micro GC - Natural Gas Analyzers Agilent 990 Micro GC User Manual...
  • Page 7 Introduction Types of Agilent 990 Micro GC - Natural Gas Analyzers Agilent 990 Micro GC - Natural Gas Analyzer A and the Extended Version Agilent 990 Micro GC - Natural Gas Analyzer B and the Extended Version Checkout Information Introduction...
  • Page 8 Agilent 990 Micro GC User Manual...

  • Page 9: Introduction

    Cleaning Instrument Disposal This chapter provides important information about using the Agilent 990 Micro Gas Chromatograph, Micro GC, safely. To prevent any injury to you or any damage to the instrument, it is essential that you read the information in this chapter.

  • Page 10: Safety Information

    Hydrogen has a very low ignition energy. • Hydrogen that is allowed to expand rapidly from high pressure into the atmosphere can self-ignite. • Hydrogen burns with a nonluminous flame which can be invisible under bright light. Agilent 990 Micro GC User Manual...

  • Page 11: Safety Symbols

    Warnings in the manual or on the instrument must be observed during all phases of operation, service, and repair of this instrument. Failure to comply with these precautions violates safety standards of design and the intended use of the instrument. Agilent Technologies assumes no liability for the customer’s failure to comply with these requirements.

  • Page 12: Safety And Regulatory Information

    Replace faulty or frayed power cords immediately with the same type and rating. • Place this instrument in a location with sufficient ventilation to remove gases and vapors. • Ensure there is enough space around the instrument for it to cool off sufficiently. Agilent 990 Micro GC User Manual...
  • Page 13 Substituting parts or performing any unauthorized modification to the instrument may result in a safety hazard. • Changes or modifications not expressly approved by the responsible party for compliance could void the user's authority to operate the equipment. Agilent 990 Micro GC User Manual...

  • Page 14: Shipping Instructions Cleaning

    Do not use compressed air to clean the instrument. Instrument Disposal When the Micro GC or its parts have reached the end of their useful life, dispose of them in accordance with the environmental regulations that are applicable in your country. Agilent 990 Micro GC User Manual...

  • Page 15: Instrument Overview

    Micro GC Cycle with Constant Pressure Micro GC Cycle with Ramped Pressure The Agilent 990 Micro GC uses GC channels, each of which consists of a Dynamic Electronic Gas Control (DEGC) injector, column, and detector. The Micro GC is a self-contained package with all of the normal GC components. It is a dual channel cabinet (one or two GC channels).

  • Page 16: Principle Of Operation

    Principle of Operation Principle of Operation The Agilent 990 Micro GC can be equipped with one or two independent column channels. Each column channel is a complete, miniaturized GC with dynamic electronic gas control, micro-machined injector, narrow-bore analytical column, and micro thermal conductivity detector (µ...

  • Page 17: Front View

    Optional secondary front sample inlet (covered) Power button with LED light Figure 2. Front view of the Agilent 990 Micro GC The LED indicator light has color states as described in Table Table 1 LED state definitions LED state Indication Red - solid Recoverable error.

  • Page 18: Front Inside View

    Sample inlet Sample inlet manifold Pump box Second sample manifold mount Sample inlet Channel locking tabs Lock bar Channel 2 Channel 2 Bottom assembly Figure 3. Front inside view of the Agilent 990 Micro GC Agilent 990 Micro GC User Manual...

  • Page 19: Rear View

    Channel Extension Cabinet Power connectors Figure 4. Rear view of the Agilent 990 Micro GC RS-232 Ethernet Digital and Analog I/O (COM-1) (LAN) Figure 5. Rear communication ports of the Agilent 990 Micro GC top assembly Agilent 990 Micro GC User Manual...
  • Page 20 Instrument Overview Rear View Carrier 1 Backflush vent Upper channel vent Carrier 2 Lower channel Sample vent vent Figure 6. Combined carrier gas and vent plate Agilent 990 Micro GC User Manual...

  • Page 21: Rear Inside View

    Gas connection adapter Combined carrier gas and vent plate Gas connection adapter CAN connection between the GC and Channel Extension Cabinet Power connectors Figure 7. Rear inside view of the Agilent 990 Micro GC Agilent 990 Micro GC User Manual...
  • Page 22 Combined carrier gas and vent plate, exposed view LCD cable COM 2 and COM 3 ports connector (inside the breakaway) Figure 9. Top assembly LCD cable connector and port connection for COM 2 and COM 3 Agilent 990 Micro GC User Manual...

  • Page 23: Communication Ports

    ‡ Standard and 990 Micro GC (Express) supports extension board only by working with Agilent OpenLab software. 990 Micro GC (PRO) supports more advanced usage of extension boards (refer to the 990 PROstation User Manual). ** Optional accessory (P/N G3588-68862).

  • Page 24: Connecting A Channel Extension Cabinet

    Connecting a Channel Extension Cabinet Connecting a Channel Extension Cabinet Two cabinets can be connected for an instrument equipped with up to four GC channels. For detailed information, see the “Agilent 990 Micro GC Channel Extension Cabinet Installation Manual” (p/n G3588-90017). Figure 10.
  • Page 25 Instrument Overview Connecting a Channel Extension Cabinet Figure 11. Rear view of two GC channel cabinets connected Agilent 990 Micro GC User Manual...

  • Page 26: Carrier Gas Connection

    Hydrogen is flammable. If you are using hydrogen as a carrier gas, pay particular attention to WAR N IN G possible leaks at connections inside and outside of the Micro GC. Use an electronic leak tester. Agilent 990 Micro GC User Manual...

  • Page 27: Power

    C AU T I O N This Power Supply, see Figure 12, is tailored to meet the power needs of your Micro GC. See Table 4 on page 28 for specifications. Figure 12. Model GST220A12-AG2 (p/n G3588-67024) Agilent 990 Micro GC User Manual...

  • Page 28: Disposal

    In compliance with CISPR22 (EN55022) Class B and FCC Part 15/CISPR 22 class B, CNS13438 class B, GB9254, EN61000-3-2, EN61000-3-3, EN61000-4-2, EN61000-4-3, EN61000-4-4, EN61000-4-5, EN61000-4-6, EN61000-4-8, EN61000-4-11 (light industry level, criteria A) Dimensions 210 × 85 × 46 mm (L×W×H) Weight 1.1 kg approximately Agilent 990 Micro GC User Manual...

  • Page 29: Ambient Pressure

    70 °C. Maximum Operation Altitude Certified up to 2,000 meters above sea level. Storage requirements • Humidity: 10 % to 95 % RH (noncondensing) • Temperature: –40 to +70 °C Agilent 990 Micro GC User Manual...

  • Page 30: Micro Gc Cycle With Constant Pressure

    LED is lit). The allows the starts. is finished. downloaded data system will sample to through the wait until data is settle in the data system. received from sample loop. the Micro GC. Agilent 990 Micro GC User Manual...

  • Page 31: Micro Gc Cycle With Ramped Pressure

    The pressure from the returned to the pressure remains final pressure to initial pressure. the same. the initial Fixed at 500 mS. pressure. Agilent 990 Micro GC User Manual...
  • Page 32 Instrument Overview Micro GC Cycle with Ramped Pressure Agilent 990 Micro GC User Manual...

  • Page 33: Installation And Use

    This chapter describes how to install and use the instrument. For an initial installation, an example of a typical packing list is also included. The actual packing list and included parts depend on the options ordered. Agilent 990 Micro GC User Manual...

  • Page 34: Pre-Installation Requirements

    Inspect the instrument and accessories carefully for damage or signs of rough handling. Report damage to the carrier and to your local Agilent office. Avoid back strain or injury by following all safety precautions when lifting heavy objects. WAR N IN G Agilent 990 Micro GC User Manual...

  • Page 35: Review The Packing List

    Ethernet cross Cable yellow 2.8 mtr CP736879 Capil. Ext. Filter CP736729 External Sample Filter Kit G3588-90001 990 Micro GC User Information CD * See Figure Figure 13. Contents of the Agilent 990 Micro GC shipping kit. Agilent 990 Micro GC User Manual...

  • Page 36: Agilent 990 Micro Gc Installation

    Agilent 990 Micro GC Installation Agilent 990 Micro GC Installation If you are installing the Agilent 990 Micro GC for the first time, follow the steps as described below. If you are performing a reinstallation, see Long Storage Recovery Procedure on page 41.

  • Page 37: Step 4: Connect To Computer Or Local Network

    Step 6: Assign an IP address The Agilent 990 Micro GC has a default static IP address assigned when first delivered. The default IP address is specified on the sticker together with the MAC address and the mainboard...
  • Page 38 7 To save the IP configuration, click Save. 8 This IP address is now the active IP address. Because the IP address of the Agilent 990 Micro GC has changed as intended, communication with the Agilent 990 Micro GC will be lost until the new IP address is accessed.

  • Page 39: System

    Create the Test Method Create the Test Method Use a test method to perform a checkout at first startup to ensure the Agilent 990 Micro GC is functioning properly. A test method for each standard column type has been provided in the sections listed in Table If your system contains one or more Molesieve columns, ensure it is conditioned before use.

  • Page 40: Perform A Series Of Runs

    1 Create a short sequence of at least three runs using the test sample and method. 2 Run the sequence. 3 After the first run, the results for each channel should become similar to the example chromatograms. Agilent 990 Micro GC User Manual...

  • Page 41: Shut Down Procedure

    6 Condition the GC column, preferably overnight. This will ensure that all the water has been removed from the column module, and no damage will occur to the TCD filaments. For more information, see Column conditioning on page 73. Agilent 990 Micro GC User Manual...
  • Page 42 Installation and Use Long Storage Recovery Procedure Agilent 990 Micro GC User Manual...

  • Page 43: Sample Gas Handling

    Installing Sample Inlets Using the External Filter Unit Heated Zones Connecting a Sample to the 990 Micro GC 990 Micro GC Optional Pressure Regulators Manual Injection The Micro GC is built for the analysis of gases and vapors only. You are advised to prepare a noncondensing gaseous standard sample for routine checkup of the instrument.

  • Page 44: Installing Sample Inlets

    Sample Gas Handling Installing Sample Inlets Installing Sample Inlets Each Agilent 990 Micro GC can be outfitted with two sample inlets for up to two types of sample. Each hexagonal sample inlet mainfold has one inlet port and four output ports. •...
  • Page 45 2 Connect sample inlet tubing to the Hexagonal Sample Inlet Manifold (p/n G3588-60662). 3 Using two Torx T-10 screws, attach the Hexagonal Sample Inlet Manifold to the front of the Pump Assembly in the position shown below. 4 Connect sample inlet tubing to the GC Channel. Agilent 990 Micro GC User Manual...

  • Page 46: Sample Inlet Configurations

    Sample Gas Handling Sample inlet configurations Sample inlet configurations There are many sample inlet configurations possible with the Agilent 990 Micro GC. The following images include configurations using one and two GC units. Scenario 1 Scenario 2 Scenario 3 Scenario 4...

  • Page 47: Using The External Filter Unit

    To ”Sample In” From Micro GC sample Frit for external filter 1/16-inch nut (CP736735) Figure 16. Heated injector connection Whenever possible, remove moisture from samples introduced to the Micro GC. Agilent 990 Micro GC User Manual...

  • Page 48: Heated Zones

    Heated Zones Heated Zones The heated zones in the 990 Micro GC can be categorized into unit level heated zone and channel related heated zone. Unit level heat zone is for sample inlets heating, and to keep the sample line heated without cold spots between the column module and sample inlet.

  • Page 49: Connecting A Sample To The 990 Micro Gc

    Connecting a Sample to the 990 Micro GC Connecting a Sample to the 990 Micro GC The following sections describe how to connect your sample to the 990 Micro GC depending on the sample inlet configuration. The metal surfaces of the sample inlet heater can be very hot. Before connecting a sample, allow WAR N IN G the sample inlet heater to cool down to ambient temperature.

  • Page 50: 990 Micro Gc Optional Pressure Regulators

    990 Micro GC Optional Pressure Regulators 990 Micro GC Optional Pressure Regulators Agilent offers two optional sample inlet pressure regulator assemblies for the 990 Micro GC. These assemblies are provided fully assembled, and require field installation on the rear of the GC.
  • Page 51 5 Tighten the two Torx T-20 screws to secure the bracket to the GC. 6 Position the G3588-68863 pressure regulator assembly at the side of the GC, and secure using the lower mounting bolt. Agilent 990 Micro GC User Manual...
  • Page 52 9 Connect the Sample IN port on the pressure regulator to the sample input line. 10 Start the GC (see Long Storage Recovery Procedure on page 41). 11 Leak test the system to ensure that all connections are leak free. Agilent 990 Micro GC User Manual...

  • Page 53: G3588-68864

    The metal surfaces of the channel and sample inlet can be very hot. Before connecting a tubing WAR N IN G for sample, allow the GC components to cool to ambient temperature. 2 At the front of the GC, disconnect any existing tubing for sample from the sample inlet. Agilent 990 Micro GC User Manual...
  • Page 54 GC. 4 Slide the bracket onto the GC. 5 Use a 5/16 inch wrench to connect the 1/16 inch tubing to the sample inlet manifold by the 1/16 inch Swagelock fitting. Agilent 990 Micro GC User Manual...
  • Page 55 7 Connect the Sample IN port on the pressure regulator to the sample input line. 8 Start the GC (see Long Storage Recovery Procedure on page 41). 9 Leak test the system to ensure that all connections are leak free. Agilent 990 Micro GC User Manual...

  • Page 56: Manual Injection

    (p/n 5190-1543: syringe 10 mL, PTPE, luer lock valve). There may be unique syringe requirements when performing Septum nut injection. The manual syringe injection would lead to increase the repeatability (RSD%) compared to NOTE automated pump or continuous flow mode. Agilent 990 Micro GC User Manual...
  • Page 57 Sample Gas Handling Injection procedure Figure 20. Septum nut injection port (p/n G3588-68865) installed Figure 21. Luer lock injection port (p/n G3588-68866) installed Agilent 990 Micro GC User Manual...

  • Page 58: Manual Injection Flow Diagram

    Channel 3 Injector Injector Channel 2 Channel 4 Figure 22. Manual injection flow diagram for the 990 Micro GC To replace the septum, see Septum Replacement for Manual Injection on page 103. Manual injection kits Table 11 Manual injection kits...
  • Page 59 SCR-SKT Button-HD T-20 M4X.7 8 SST Zn CP742983 Septum injection port Assy 0100-0053 Stainless Nut 1/16 in CP4625 Vesper Ferrule 1/16 x 0.8mm 10pk CP179463 GLASSSL.ID 1.0 RED * See Figure Figure 23. Septum nut injection port (p/n G3588-68865) Agilent 990 Micro GC User Manual...
  • Page 60 Fitting, ext Luer lock,10-32 thrd,1/pk VLZLA1 Female luer adapter to 1/16 ftgs 2815892301 POLYURETHANE,1/16inx1/8inx25ft,CLEARTUB. 0100-0053 Stainless Nut 1/16 in CP179463 GLASSSL.ID 1.0 RED * See Figure Figure 24. Luer lock injection port (p/n G3588-68866) Agilent 990 Micro GC User Manual...

  • Page 61: Micro Gc Channels

    (up to four GC channels). A GC channel contains a gas regulator, an injector, a column, and a TCD detector. See Figure 25 on page 62. This chapter provides a brief discussion on the major components in the Micro GC and the backflush option. Agilent 990 Micro GC User Manual...

  • Page 62: Carrier Gas

    Dynamic Columns electronic gas (analytical and Gas clean unit control (DEGC) reference) (optional) Injector µTCD Reference vent Column vent Sample in Sample out Carrier gas Figure 25. Gas flow diagram Agilent 990 Micro GC User Manual...

  • Page 63: Dynamic Electronic Gas Control (Degc)

    Inert Sample Path The 990 Micro GC is equipped with an Ultimetal-treated sample path. This deactivation method ensures the integrity of the sample and helps to achieve the best detection limits possible.

  • Page 64: Column

    Micro GC Channels Column Column Altering the GC channels requires a trained Agilent service engineer. Other columns are available by contacting Agilent Technologies. Table 14 shows several standard columns and their selected applications. Table 14 Agilent Micro GC columns and applications...

  • Page 65: Molsieve 5Å Columns

    _________ Oxygen 0.2 % Oxygen 0.2 % Peak 5 _________ Nitrogen 0.2 % Nitrogen 0.2 % Molsieve 5Å 4 m heated Molsieve 5Å 10 m heated Molsieve 5Å 20 m heated Seconds Seconds Seconds Agilent 990 Micro GC User Manual...

  • Page 66: Cp-Sil 5 Cb Columns

    Propane 1.0 % Peak 4 i-Butane 0.14 % i-Butane 0.14 % Peak 5 n-Butane 0.2 % n-Butane 0.2 % CP Sil 5 CB 4 m heated CP Sil 5 CB 6 m heated Seconds Seconds Agilent 990 Micro GC User Manual...

  • Page 67: Cp-Sil 13 Cb And Cp-Sil 19 Cb Columns

    TBM 6.5 ppm THT 4.6 ppm Peak 3 ________ n-Nonane 4.5 ppm CP Sil 13 CB CP Sil 19 CB 12 m heated (TBM) 6 m heated (THT) -0.5 -0.2 -0.4 -1.5 -0.6 -0.8 Seconds Seconds Agilent 990 Micro GC User Manual...

  • Page 68: Poraplot 10 M Column

    Propane 1.0 % Propane 1.0 % Peak 4 i-Butane 0.14 % i-Butane 0.14 % Peak 5 n-Butane 0.2 % n-Butane 0.2 % PoraPlot U 10 m heated PoraPlot Q 10 m heated Seconds Seconds Agilent 990 Micro GC User Manual...

  • Page 69: Hayesep A 40 Cm Heated Column

    Sample time 30 s Injection time 40 ms Run time 60 s Detector sensitivity Auto Peak 1 Nitrogen 0.77 % Peak 2 Methane balance Peak 3 Ethane 8.1 % HayeSep A 40 cm heated Seconds Agilent 990 Micro GC User Manual...

  • Page 70: Co X And Al

    Peak 3 CO 1.0 % Propane 1.0 % Peak 4 Methane 1.0 % i-Butane 0.14 % Peak 5 1.0 % n-Butane 0.2 % Helium balance 1 m heated /KCl 10 m heated -0.5 Seconds Seconds Agilent 990 Micro GC User Manual...

  • Page 71: Volamine Column

    Column pressure 150 kPa (21 psi) Sample time 30 s Injection time 40 ms Run time 60 s Detector sensitivity Auto Peak 1 Nitrogen Balance Peak 2 Ammonia 100 ppm µV 0.55 0.65 Minute Agilent 990 Micro GC User Manual...

  • Page 72: Mes (Nga) And Cp-Wax 52 Cb Columns

    MES 14. 2 ppm Methanol 0.15 % Peak 4 ________ Ethanol 0.30 % Helium Balance MES 10 m heated (NGA) CP-WAX 52 CB 4 m heated 4000 3500 3000 2500 2000 -0.3 1500 1000 -500 Seconds Seconds Agilent 990 Micro GC User Manual...

  • Page 73: Column Conditioning

    Follow this procedure to make sure that any water inside the analytical column is removed before the TCD is switched on. Column conditioning is specifically recommended if the 990 Micro GC has been inactive for a long period of time.

  • Page 74: Replacing Channel Column, Injector Die, And Tcd

    Replacing Channel Column, Injector Die, and TCD The channel column, injector die and micro-TCD can be replaced by service engineers and OEM partners. See the Agilent 990 Micro GC Service Manual (p/n G3588-90020) for detailed information. Agilent 990 Micro GC User Manual...

  • Page 75: Backflush Option

    The sample is injected onto the precolumn where a preseparation takes place; injection takes place in normal mode. See Figure Restriction System Analytical Precolumn Detector pressure column Pressure regulator Pressure point Injector Backflush vent Figure 27. Backflush system normal flows Agilent 990 Micro GC User Manual...
  • Page 76 The standby mode is the backflush configuration (if the instrument is equipped with the optional backflush valve). Backflushing saves the time required to elute high boiling components that are not of interest, and ensures that the precolumn will be in good condition for the next run. Agilent 990 Micro GC User Manual...

  • Page 77: Tuning The Backflush Time (Except On A Hayesep A Channel)

    Figure 29 shows a simple example of tuning the backflush time for the CP-Molsieve 5A channel. Tuning backflush for CP-Molsieve channel Figure 29. Effect of the backflush time on the peak of interest Agilent 990 Micro GC User Manual...

  • Page 78: Tuning The Backflush Time On A Hayesep A Channel

    Seconds Figure 30. Selecting backflush time for a HayeSep A channel To disable backflush To disable backflushing, set the backflush time to 0. This puts the system in normal mode during the entire run. Agilent 990 Micro GC User Manual...

  • Page 79: Backflush To Detector

    The Agilent 990 Micro GC offers two types of backflush to detector channels. A CP-Sil 5 CB for natural gas analysis and Al2O3 for refinery gas analysis. The backflush to detector channel is factory tuned to group the C6+ components.

  • Page 80: Tuning The Backflush Time

    < 3 µV). Set BF time for this channel to that value minus 0.2 seconds. A typical “clean cut” time range of 8m 5CB BF2D channel is approximately 0.3-0.5 seconds. (See Figure 32.) n-pentane Figure 32. 8m 5CB Column for natural gas analysis Agilent 990 Micro GC User Manual...

  • Page 81: To Disable Backflush

    33.) cis-2-pentene Figure 33. 10m Al2O3 Column for refinery gas analysis To disable backflush To disable backflushing, set the Backflush Time to 0. This puts the system in normal mode during the entire run. Agilent 990 Micro GC User Manual...

  • Page 82: Set Invert Signal Time

    See Figure 34 for the OpenLAB CDS configuration and Figure 35 for the PROstation SW configuration. Method configuration in OpenLAB CDS Figure 34. Figure 35. Method configuration in PROstation SW Agilent 990 Micro GC User Manual...

  • Page 83: Checkout Information

    0.104 % Peak 13 1,3-Butadiene 0.311 % Peak 14 n-Pentane 0.097 % Peak 15 trans-2-Pentene 0.098 % Peak 16 2-Methyl-2-butene 0.046 % Peak 17 i-Pentene 0.097 % Peak 18 cis-2-Pentene 0.094 % Peak 19 Agilent 990 Micro GC User Manual...

  • Page 84: C6+ Calorific Value Calculation

    C6+ Calorific value calculation For calorific value calculation and application setup, please refer to the “calorific power” section from the 990-PRO Micro GC Manual or designated energy meter software. TCD Detector Each GC channel is equipped with a thermal conductivity detector (TCD). This detector responds to the difference in thermal conductivity between a reference cell (carrier gas only) and a measurement cell (carrier gas containing sample components).

  • Page 85: Channel Exchange And Installation

    Channel Exchange and Installation Replacement Procedure for Micro GC Channel The Agilent 990 Micro GC is designed for fast and easy installation and connection of analytical channels. This chapter describes how to install and remove GC channels. Before removing the Micro GC covers, allow all heated zones to cool down. Turn off the power, WAR N ING then disconnect the power cord at the source.

  • Page 86: Replacement Procedure For Micro Gc Channel

    Channel removal procedure 1 Remove power cord. 2 Remove sample-in and carrier gas connections. 3 Remove the main rear cover by removing the two Torx T-10 screws. Torx T-10 screw Main rear cover Torx T-10 screw Agilent 990 Micro GC User Manual...
  • Page 87 Channel removal procedure 4 Carefully lift and remove main rear cover. 5 Loosen (do not remove) the Torx T-20 screw attaching the Gas Connection Adapter to the channel you are removing. Torx T-20 screw Agilent 990 Micro GC User Manual...
  • Page 88 Channel Exchange and Installation Channel removal procedure 6 At the front of the device, unscrew and remove the front cover. 7 Use a 3/16 inch open-end wrench to remove the sample line tubing from the channels. Agilent 990 Micro GC User Manual...
  • Page 89 Channel removal procedure 8 Press the spring sheet to remove the lock bar. Lock bar Spring sheet Lock bar Spring sheet 9 Lift both channel locking tabs to unlock the channel from the cabinet. Agilent 990 Micro GC User Manual...
  • Page 90 Channel Exchange and Installation Channel removal procedure 10 Pull the handle to slide the channel out of the cabinet. Agilent 990 Micro GC User Manual...

  • Page 91: Channel Installation Procedure

    Channel Exchange and Installation Channel installation procedure Channel installation procedure 1 Push both tabs down. 2 Carefully slide the channel into the cabinet, until it clicks into place. Agilent 990 Micro GC User Manual...
  • Page 92 3 Insert the lock bar into the square hole on the left side, then press the lock bar on the right until a click is heard. 4 The remaining steps are the reverse of the Channel removal procedure on page 86. Agilent 990 Micro GC User Manual...

  • Page 93: Replacement Procedures

    Replacement Procedures Removing the Covers Sample Line Replacement RTS Filter Replacement Septum Replacement for Manual Injection Genie Filter Membrane Replacement Connecting the External LCD Agilent 990 Micro GC User Manual...

  • Page 94: Removing The Covers

    Removing the front cover 1 Unscrew the Torx T-10 screw at the top of the front cover, and gently pull forward from the top edge to remove the cover. 2 Installation is the reverse of removal. Agilent 990 Micro GC User Manual...

  • Page 95: Removing The Rear Covers

    1 Remove power cord. 2 Remove sample-in and carrier gas connections. 3 Remove the rear covers by removing the four Torx T-10 screws, two for each cover. Torx T-10 screw Main rear cover Torx T-10 screw Agilent 990 Micro GC User Manual...
  • Page 96 Replacement Procedures Removing the rear covers 4 Carefully lift and remove main and secondary rear covers. 5 Installation is the reverse of removal. Agilent 990 Micro GC User Manual...

  • Page 97: Sample Line Replacement

    3 Disconnect any sample gas feed lines attached to the inlet port. 4 Remove the front cover as described in Removing the front cover on page 94. 5 Use a 3/16 inch wrench to unscrew the sample line nut from the front of the channels. Agilent 990 Micro GC User Manual...
  • Page 98 Replacement procedure for Micro GC sample line 6 Remove the two Torx T-10 screws from the inlet manifold. 7 Use a 3/16 inch wrench to unscrew the sample line nuts from the inlet manifold. Agilent 990 Micro GC User Manual...
  • Page 99 10 Use a 3/16 inch wrench to screw the new sample line nut to the front of the channel. 11 Tuck the sample line into the GC cabinet so that the line does not interfere with replacement of the front cover. 12 Replace the front cover. Agilent 990 Micro GC User Manual...

  • Page 100: Rts Filter Replacement

    Removing the rear covers on page 95. 3 Remove the channel using the procedure in Channel Exchange and Installation on page 85. 4 Unscrew the two Torx T-10 screws and remove the DEGC cover. Agilent 990 Micro GC User Manual...
  • Page 101 Replacement Procedures Replacement procedure for Micro GC RTS filter 5 Remove the two Torx T-20 screws. 6 Remove the Torx T-20 screw in the center. Agilent 990 Micro GC User Manual...
  • Page 102 Replacement Procedures Replacement procedure for Micro GC RTS filter 7 Carefully remove the RTS filter. 8 Installing is the reverse of removing. Agilent 990 Micro GC User Manual...

  • Page 103: Septum Replacement For Manual Injection

    Septum Replacement for Manual Injection Septum Replacement for Manual Injection Septum injection port Figure 38. Manual injection septum replacement CP742984 Septa low bleed CP742990 Support ZF2SI Figure 39. Disassembled septum injection port Figure 40. Septum injector assembly (CP742985) Agilent 990 Micro GC User Manual...

  • Page 104: Genie Filter Membrane Replacement

    • Torx T-20 screwdriver • Tweezers Replacement procedure for Genie Filter membrane 1 Remove all tubing. 2 Remove the two screws with a T-20 screwdriver. Wear gloves to prevent contamination of the filter. NOTE Agilent 990 Micro GC User Manual...
  • Page 105 4 Use tweezers to remove the attached white membrane. 5 Place a new membrane at the center of the part, and replace the top. 6 Replace the two screws, and tighten with a T-20 screwdriver. Agilent 990 Micro GC User Manual...

  • Page 106: Connecting The External Lcd

    Connecting the External LCD Connecting the External LCD The Agilent 990 Micro GC comes with an optional LCD (p/n G3588-68862). The display is a 4.7 inch touch screen. The LCD is fixed at the top of main unit and controlled by the mainboard.
  • Page 107 Replacement Procedures LCD touch screen Overview You can see how many channels are installed, the instrument status, column actual temperature, injector actual temperature and actual pressure, as well as other information. Figure 41. Overview Agilent 990 Micro GC User Manual...
  • Page 108 This page displays instrument status and setpoints. Figure 42. Method & Status Method editing is not supported by LCD UI. The only exception is the 990 Mobile Micro GC, NOTE which allows the user to switch the gas source through this LCD UI.
  • Page 109 Actual operating conditions • Instrument and run status • Calculated values • Instrument errors This feature needs a PRO license. See PROstation for 990 Micro GC User Manual (p/n G3588-90012) Figure 44. Customized Display Agilent 990 Micro GC User Manual...
  • Page 110 Replacement Procedures LCD touch screen Agilent 990 Micro GC User Manual...

  • Page 111: Communications

    This chapter describes the input and output ports of the Micro GC for interfacing with external devices. Also included is an overview of the constant pressure cycle and the ramped (programmed) pressure cycle of the Micro GC. Agilent 990 Micro GC User Manual...

  • Page 112: Access The Connection Ports

    Access the Connection Ports Access the Connection Ports The external device connection ports on the 990 Micro GC are located in the top assembly. The connectors at the rear of the top assembly, from left to right, are RS-232 (COM-1), USB, Ethernet (LAN), and multiconnector (for digital and analog I/O).
  • Page 113 Access the Connection Ports Table 27 COM 1 PINs Comment COM 1 no connection received data transmit data no connection signal ground no connection request to send clear to send no connection Figure 48. COM 1 detail Agilent 990 Micro GC User Manual...
  • Page 114 Table 28 COM 2 and COM 3 PINs Com port PIN No. RS 232 RS 422/485 RS485 2-wire COM2 Data- Data+ not used not used COM3 Data- Data+ not used not used Figure 49. COM 2 and COM 3 detail Agilent 990 Micro GC User Manual...

  • Page 115: 990 Chromatography Data Systems

    990 Chromatography Data Systems 990 Chromatography Data Systems The 990 Micro GC requires an Agilent chromatography data system (CDS) for control, peak identification, integration, data analysis, reporting, and so forth. The CDS requires a LAN (Ethernet) connection or Wi-Fi. Multiple Micro GCs can be controlled using an Agilent data system such as OpenLAB EZChrom, OpenLAB ChemStation, or OpenLAB 2.x.

  • Page 116: Ethernet Networks

    Isolated LANs must use IP addresses in the “private” ranges shown in Table Table 29 Private (isolated) LAN IP address ranges Starting IP Ending IP Subnet mask Type 0.0.0.0 255.255.255.255 Public 10.0.0.0 10.255.255.255 255.0.0.0 Private 172.16.0.0 172.31.255.255 255.255.0.0 Private 192.168.0.0 192.168.255.255 255.255.0.0 Private Agilent 990 Micro GC User Manual...

  • Page 117: Example Network Configurations

    Data system PC Micro GC ddress allowed Any IP a with mainboard Single 990 connected to a local ation. IP address in the same workst subnet range as the computer subnet range. Figure 50. Peer-to-peer (single instrument) Peer-to-peer communication requires IP addresses in the same subnet range for the computer and the Micro GC.
  • Page 118 IP address in the same subnet range as the workstation subnet range. Figure 51. Local network (multiple instruments) OpenLAB CDS maximum connections are limited by the computer speed, license, and network performance. Agilent 990 Micro GC User Manual...

  • Page 119: Subnet 1

    Data system PC range as Subnet 2 IP address in subnet range of Subnet 2. Can also control Micro GC in Subnet 1. Figure 52. Global network with multiple instruments Agilent 990 Micro GC User Manual...

  • Page 120: Usb Wi-Fi

    2 On your PC desktop, open the wireless connection panel. Find the instrument WIFI hotspot. Note the name ' A P-990' is the default SSID name of USB NIC attached to micro GC. You are able to change this name through the GC web page later.

  • Page 121: Frequently Asked Questions (Faq)

    Without the IP Address, communications would be bogged down trying to establish connections to Ethernet addresses at unknown locations. Patch cable A cable that is used to connect Ethernet devices to hubs, switches, or your company network. Agilent 990 Micro GC User Manual...
  • Page 122 TCP/IP An international standard protocol used by the Internet. We use this protocol for communication to the Micro GC. You may find several network protocols, such as IPX/SPX and NetBEUI, installed on your computer. Agilent 990 Micro GC User Manual...

  • Page 123: External I/O

    Digital IN 2 DGND Digital OUT 1 Digital OUT 2 Not used Not used Not used EXT START IN EXT READY IN EXT system reset IN Not used RELAY 1 COM Figure 53. External connections Agilent 990 Micro GC User Manual...
  • Page 124 Analog I/O (see Figure 55), with an extension Y Cable (p/n G3588-60825) shown in Figure 56 page 125. Note the I/O definition of adapted ports are compatible with those of the 990 Micro GC. Figure 54. External digital I/O Figure 55.
  • Page 125 Communications External I/O Figure 56. Extension Y Cable (p/n G3588-60825) Figure 57. Analog and digital I/O for Extension Y Cable (p/n G3588-60825) Agilent 990 Micro GC User Manual...
  • Page 126 Communications External I/O Agilent 990 Micro GC User Manual...

  • Page 127: Errors

    Errors Error Handling Error List Agilent 990 Micro GC User Manual...

  • Page 128: Error Handling

    All errors, regardless of class, are available to the data system under instrument status (for troubleshooting). All Class 1 and higher errors are also logged in the instrument's flash memory. All errors are identified by numbers built from the error class and a number. Events are not numbered. Agilent 990 Micro GC User Manual...

  • Page 129: Error List

    Injector temperature fault, chan = <n> CRITICAL Injector heater sensor fault, chan = <n> CRITICAL Injector heater is open, chan = <n> CRITICAL Injector heater is short, chan = <n> RECOVERABLE Injector heating too slow, chan = <n> Agilent 990 Micro GC User Manual...
  • Page 130 Spare heater 2 temperature is restored INFO Self-testing cycle start INFO Self-testing cycle end RECOVERABLE License lost due to key detached INFO License restored INFO Wait for preconditions of flush cycle INFO Start one flush cycle Agilent 990 Micro GC User Manual...
  • Page 131 Internal power failure restored. chan = s<n> INFO Loading mainboard EDS INFO Loading channel controller <n> EDS INFO Loading analytical module <n> EDS WARN Mainboard EDS logging error WARN CCB EDS logging error, chan = <n> Agilent 990 Micro GC User Manual...
  • Page 132 Anyapp report generated! Run #<n> WARN Anyapp report store failed INFO Automation starts WARN Automation is aborted INFO Sequence started INFO Sequence quit INFO Calibration block started INFO Calibration block quit INFO Verification block started Agilent 990 Micro GC User Manual...
  • Page 133 Field case battery <n> over voltage WARN Field case battery <n> cell short WARN Field case battery <n> cell open WARN Field case battery <n> NTC open WARN Field case battery <n> gauge communication failure Agilent 990 Micro GC User Manual...
  • Page 134 Gasifier vaporizer heating too slow WARN Gasifier communication lost INFO Gasifier is detected WARN Field case battery <n> cannot start charging due to over temperature WARN Field case battery <n> stops charging due to over temperature Agilent 990 Micro GC User Manual...

  • Page 135: Micro Gc Biogas Analyzers

    Biogas Analyzer The Agilent 990 Micro GC Biogas Analyzer is used to analyze pure biogas including analysis of permanent gases, hydrogen sulfide and hydrocarbons up to n-propane. This is a basic cabinet equipped with a CP-Molsieve 5A channel and a CP-PoraPLOT U channel with dual carrier gas option.

  • Page 136: Checkout Information

    The Biogas Analyzer is factory tuned including appropriate settings for backflush times for the CP- Molsieve 5A and CP-PoraPLOT U channel. Final checkout of the Agilent 990 Micro GC Biogas Analyzers is performed with a Universal Gas Calibration standard. This contains helium, neon, hydrogen, oxygen, nitrogen, methane, ethane, ethylene, carbon dioxide, carbon monoxide, acetylene, n-propane, methyl acetylene and n-butane.

  • Page 137: Cp-Molsieve Channel

    Figure 58 is a chromatogram of the Universal gas Calibration Standard analyzed on the CP-Molsieve 5A channel. Seconds Figure 58. The Universal Gas Calibration Standard analyzed on the CP-Molsieve channel Agilent 990 Micro GC User Manual...

  • Page 138: Cp-Poraplot U Channel

    If a sample contains hydrogen sulfide, the chromatogram resembles Figure Seconds Figure 59. The Universal Gas Calibration Standard analyzed on the CP-PoraPLOT U channel Seconds Figure 60. A mixture with hydrogen sulfide analyzed on the CP-PoraPLOT U channel Agilent 990 Micro GC User Manual...

  • Page 139: Cp Sil 5 Cb Channel

    Figure 62. A hydrocarbon mixture up to Hexane analyzed on the CP-Sil 5 CB channel For tuning the backflush time, please refer to “Tuning the backflush time on a HayeSep A channel” on page 78. Agilent 990 Micro GC User Manual...

  • Page 140: Certificate Of The Universal Gas Calibration Standard

    10 Micro GC Biogas Analyzers Certificate of the Universal Gas Calibration Standard Certificate of the Universal Gas Calibration Standard Part No: 5184-3541 Part No. Kit: 5184-3546 Agilent 990 Micro GC User Manual...

  • Page 141: The Biogas Analyzer Method

    Sample inlet temperature (°C) Invert signal For more details of the method see the PDF method file available on the analyzer CD. The backflush time must be tuned for each new CP-Molsieve and CP-PoraPLOT channel. Agilent 990 Micro GC User Manual...
  • Page 142 10 Micro GC Biogas Analyzers The Biogas Analyzer Method Agilent 990 Micro GC User Manual...

  • Page 143: Micro Gc Natural Gas Analyzer

    Micro GC Natural Gas Analyzer Agilent 990 Micro GC - Natural Gas Analyzers Checkout Information Certificate of the NGA Gas Calibration Standard Certificate of the Universal Gas Calibration Standard Typical Method Settings for Natural Gas Analyzers Carrier Gas Type Configuration...

  • Page 144: Agilent 990 Micro Gc - Natural Gas Analyzers

    The Agilent 990 Micro GC - Natural Gas Analyzer A is used to analyze natural gas samples containing methane, carbon dioxide, and hydrocarbons up to n-nonane. The Agilent 990 Micro GC - Natural Gas Analyzer A is a basic cabinet micro GC equipped with two channels: •...

  • Page 145: Agilent 990 Micro Gc - Natural Gas Analyzer B And The Extended Version

    The Agilent 990 Micro GC - Natural Gas Analyzer B is used to analyze methane, carbon dioxide, hydrogen sulfide, and light hydrocarbons up to n-nonane in natural gas. The Agilent 990 Micro GC - Natural Gas Analyzer B is a basic cabinet micro GC equipped with two channels: •...

  • Page 146: Checkout Information

    CP-Molsieve 5A • PoraPLOT U The final checkout of the Agilent 990 Micro GC - Natural Gas Analyzer is performed with a NGA Gas Calibration standard and a Universal Gas Calibration standard. • The NGA Gas Calibration standard contains nitrogen, methane, ethane, carbon dioxide, propane, iso-butane, n-butane, iso-pentane, n-pentane, and n-hexane.

  • Page 147: Natural Gas Analyzer A And The A Extended Version

    Analysis of the Universal Gas Calibration standard results in a chromatogram similar to Figure Seconds Figure 63. NGA Gas Calibration standard analyzed with the HayeSep A channel on Analyzer A Seconds Figure 64. Universal Gas Calibration standard analyzed with the HayeSep A channel on Analyzer A Agilent 990 Micro GC User Manual...
  • Page 148 15.0 17.5 20.0 22.5 25.0 27.5 30.0 32.5 35.0 37.5 40.0 42.5 45.0 47.5 50.0 52.5 Seconds Figure 66. Sample containing neo-pentane analyzed with the 6 meter CP-Sil 5 CB channel on Analyzer A Agilent 990 Micro GC User Manual...
  • Page 149 Universal Gas Calibration standard analyzed with the 6 meter CP-Sil 5 CB channel on Analyzer A Seconds Figure 68. Sample containing hydrocarbons up to nonane analyzed with the 6 meter CP-Sil 5 CB channel on Analyzer A Agilent 990 Micro GC User Manual...
  • Page 150 Seconds Figure 69. NGA Gas Calibration standard analyzed with the HayeSep A channel on Analyzer A Extended Seconds Figure 70. Universal Gas Calibration standard analyzed with the HayeSep A channel on Analyzer A Extended Agilent 990 Micro GC User Manual...
  • Page 151 Analysis of the Universal Gas Calibration standard results in the chromatogram shown in Figure 15.0 12.5 10.0 Seconds Figure 73. Universal Gas Calibration standard analyzed with the 4 meter CP-Sil 5 CB channel on Analyzer A Extended Agilent 990 Micro GC User Manual...
  • Page 152 NGA Gas Calibration standard analyzed with the 8 meter CP-Sil 5 CB channel on Analyzer A Extended Seconds Figure 75. Universal Gas Calibration standard analyzed with the 8 meter CP-Sil 5 CB channel on Analyzer A Extended Agilent 990 Micro GC User Manual...
  • Page 153 Hydrocarbon gas mix containing n-heptane to n-decane analyzed with the 8 meter CP-Sil 5 CB channel on Analyzer A Extended Seconds Figure 77. Hydrocarbon gas mix containing n-hexane to n-dodecane analyzed with the 8 meter CP-Sil 5 CB channel on Analyzer A Extended Agilent 990 Micro GC User Manual...

  • Page 154: Natural Gas Analyzer B And B Extended Version

    Natural Gas Analyzer B and B Extended Version PoraPLOT U The PoraPLOT U channel of the Agilent 990 Micro GC - Natural Gas Analyzer B and Extended version is specified for the analysis of methane, carbon dioxide, ethane, hydrogen sulfide, and propane in natural gas samples.
  • Page 155 Analysis of a sample containing hydrogen sulfide results in a chromatogram similar to Figure Seconds Figure 79. Universal Gas Calibration standard analyzed with the PoraPLOT U channel on Analyzer B Seconds Figure 80. Sample containing hydrogen sulfide analyzed with the PoraPLOT U channel on Analyzer B Agilent 990 Micro GC User Manual...
  • Page 156 NGA Gas Calibration standard analyzed with the 6 meter CP-Sil 5 CB channel on Analyzer B 10.0 Seconds Figure 82. Universal Gas Calibration standard analyzed with the 6 meter CP-Sil 5 CB channel on Analyzer B Agilent 990 Micro GC User Manual...
  • Page 157 Sample containing neo-pentane analyzed with the 6 meter CP-Sil 5 CB channel on Analyzer B Seconds Figure 84. Sample containing hydrocarbons up to n-nonane analyzed with the 6 meter CP-Sil 5 CB channel on Analyzer B Agilent 990 Micro GC User Manual...
  • Page 158 Figure 85. NGA Gas Calibration standard analyzed with the CP-Molsieve 5A channel on Analyzer B Extended 12.5 10.0 Seconds Figure 86. Universal Gas Calibration standard analyzed with the CP-Molsieve 5A channel on Analyzer B Extended Agilent 990 Micro GC User Manual...
  • Page 159 Universal Gas Calibration standard analyzed with the CP-Molsieve 5A channel on Analyzer B Extended For tuning the backflush time, please refer to Tuning the backflush time on a HayeSep A channel on page 78. Agilent 990 Micro GC User Manual...

  • Page 160: Certificate Of The Nga Gas Calibration Standard

    11 Micro GC Natural Gas Analyzer Certificate of the NGA Gas Calibration Standard Certificate of the NGA Gas Calibration Standard Part number: 5184-3544 Agilent 990 Micro GC User Manual...

  • Page 161: Certificate Of The Universal Gas Calibration Standard

    11 Micro GC Natural Gas Analyzer Certificate of the Universal Gas Calibration Standard Certificate of the Universal Gas Calibration Standard Part number 5184-3546 Agilent 990 Micro GC User Manual...

  • Page 162: Typical Method Settings For Natural Gas Analyzers

    Sample inlet temperature (°C) * For more details of the method, see the pdf-method file available on the Natural Gas Analyzer CD. Table 34 Method for Agilent 990 Micro GC - Natural Gas Analyzer A Extended Method settings HayeSep A...
  • Page 163 * For more details of the method, see the pdf-method file available on the Natural Gas Analyzer CD. † The backflush time must be tuned for each new CP-Molsieve 5A, PoraPLOT U, 4 meter CP-Sil 5 CB, and HayeSep A channel. Table 36 Method for Agilent 990 Micro GC - Natural Gas Analyzer B Extended Method settings...

  • Page 164: Carrier Gas Type Configuration

    Carrier Gas Type Configuration Carrier Gas Type Configuration The Agilent 990 Micro GC - Natural Gas Analyzers are factory tuned using the carrier gas helium. When analysis of helium is required, the carrier gas must be changed to argon. Instruments with the dual carrier option are typically configured as shown below.

  • Page 165: Procedure To Change The Carrier Gas Type

    If you are using Agilent OpenLAB CDS edition, use the following procedure to change the carrier gas type. 1 In the Agilent OpenLAB Control Panel Navigation pane, select the instrument. 2 In the Actions toolbar, select Configure Instrument. 3 Double-click Agilent 990 Micro GC. Agilent 990 Micro GC User Manual...
  • Page 166 4 In the Configuration dialog box, select the Instrument configuration tab. 5 In the Carrier gas list, select Argon. 6 Select Apply Configuration. The new configuration is sent to the instrument as shown below. Agilent 990 Micro GC User Manual...
  • Page 167 8 Turn off the instrument. 9 Change the carrier gas on the instrument. 10 Restart the Agilent 990 Micro GC - Natural Gas Analyzer. The Agilent 990 Micro GC is now configured for carrier gas Argon. Agilent 990 Micro GC User Manual...

  • Page 168: Method For Cp-Molsieve 5A Channel With Carrier Gas Argon

    Argon Injector temperature (°C) Injection time (ms) Backflush time (s) Column temperature (°C) Pressure (kPa) Sample inlet temperature (°C) Invert signal * The backflush time must be tuned for each new CP-Molsieve 5A channel. Agilent 990 Micro GC User Manual...
  • Page 169 This page intentionally left blank. Agilent 990 Micro GC User Manual...
  • Page 170 © Agilent Technologies, Inc. 2022 Third edition, August 2022 *G3588-90010* G3588-90010...

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