Agilent 6890 Accessories-Installation Guides (G1532-90337 TCD)
Contents
1. Installation Guide Thermal Conductivity Detector on a 6890 GC Accessories G1563A G1592A Agilent Technologies Agilent Technologies 2001 All Rights Reserved Reproduction adaptation or translation without permission is prohibited except as allowed under the copyright laws Part number G1532 90337 First Edition AUG 2001 Printed in USA Safety Information The Agilent Technologies 6890 Gas Chromatograph meets the following IEC International Electrotechnical Commission classifications Safety Class 1 Transient Overvoltage Category Il and Pollution Degree 2 This unit has been designed and tested in accordance with recognized safety standards and designed for use indoors If the instrument is used in a manner not specified by the manufacturer the protection provided by the instrument may be impaired Whenever the safety protection of the Agilent 6890 has been compromised disconnect the unit from all power sources and secure the unit against unintended operation Refer servicing to qualified service personnel Substituting parts or performing any unauthorized modification to the instrument may result in a safety hazard Disconnect the AC power cord before removing covers The customer should not attempt to replace the battery or fuses in this instrument The battery contained in this instrument is recyclable Safety Symbols Warnings in the manual or on the instrument must be observed during al2. Front detector Ridges Troughs Flow manifold 4 Route the switching valve leads from the flow manifold to the opening in the PC board If you re installing a front detector tuck the leads underneath the connectors on the PC board as shown Gently insert the leads into the opening Leads from front detector 23 Appendix Installing the pneumatics module early version 5 Plug the ribbon cable into the front or back connector Make certain the connector is firmly seated and locked If the flow manifold is installed and plugged into the correct position the ribbon cable will retain its fold as shown in the diagram If you unplugged an inlet ribbon cable in Step 2 replace it LZ BoA 7 FN Open connector Folded ribbon cable k Locked connector 6 From the front of the GC secure the flow manifold to the carrier by tightening the captive screw until snug using a T 20 Torx screwdriver Front captive screw Back captive screw 24 25 Agilent Technologies Printed on recycled paper This product is recyclable Agilent Technologies Inc Printed in USA AUG 2001 G1532 90337
3. area Front detector tubing Back detector tubing Restoring the GC to operating condition Restoring the GC to operating condition 1 Reinstall the electronics side panel 2 Reinstall the top rear panel 3 Reinstall the detector cover 4 Reinstall the electronics top cover 5 Plugin the GC and turn it on 6 Press Front Det or Back Det If the detector has been properly installed you will see the following display EPC NonEPC FRONT DET TCD FRONT DET TCD Temp 24 Off Temp 24 Off Ref flow 0 xt off Ref flow Off Mkup He 0 xt Off Mkup He Off Filament Off Filament Off Output off 0 0 Output off 0 0 Neg polarity Off Neg polarity Off f An actual flow value is displayed when the gases are off or not connected This is not an error After the gases are connected and the detector is operational the actual flow values will be equal to the setpoint values 20 Caution Zeroing your detector EPC only Zeroing your detector EPC only Your detector s flow manifold contains a pressure sensor that may be zeroed after it is installed on your GC This zero procedure ensures an accurate detector display Do not connect the detector and makeup gases to your flow manifold until you have zeroed your detector s pressure sensor 1 Plugin your GC and turn it on if you haven t already done so Wait 15 minutes This allows your GC to reach thermal equilibriu
4. chassis and through the slots to the detector location Connect the ribbon cable to the mating connector on the pneumatics board Arrange the cable to keep it away from the valves and keep it from being pinched between board components and the manifold For the back detector you may want to loosen the manifold and slide it out of the carrier a few centimeters to connect the cable to the pneumatics board Then reinstall the manifold Using a pair of needle nosed pliers remove the appropriate top rear panel detector cutout for the TCD Also remove any cutouts needed to access other manifolds or accessories installed in the GC See Figure 3 Installing the flow manifold Insert tip of pliers here Back inlet Front inlet Front detector Auxiliary Left most screw slot Back detector Figure 3 Top rear panel cutouts 7 Place the top rear panel on its left most mounting screw Use the screw as a hinge and angle the panel while sliding each manifold ID tag through its cutout in the panel working from left to right When all the tags are through the panel finish installing the panel on the GC 8 Install the RFI cover the pneumatics cover and the detector top cover Connect the source gas lines to the manifold See Figure 4 TCD ENEE E A PROGRAMMABLE 4300G100N Figure 4 Gas line connections 10 Restore gas pressures and leak check all fittings Installing the makeup and ref
5. e only the insulation within the scribed circle 3 Carefully remove the scribed circle of insulation from the oven top to create an opening into the oven Positioning and securing the detector Method 1 Use a sharp knife to cut out the insulation using the scribed circle as a guide Method 2 Pierce the insulation with a screwdriver Rotate the screwdriver around the circumference of the scribed circle to remove excess insulation Clean up any pieces of insulation that fall inside the oven Place the bottom insulation in the detector cavity 13 Positioning and securing the detector 5 Place the top insulation in the detector cavity Machine screws Captive screws Pallet Top insulation Bottom insulation 6 Place the detector pallet in the insulated cavity Partially tighten the two captive screws with a T 20 Torx screwdriver Install the two machine screws and partially tighten Tighten all the screws to snugness Connecting the detector Connecting the detector Caution Board components can be damaged by static electricity use a properly grounded static control wrist strap when handling the TCD board 1 Remove the TCD board from its static control bag and slide into the front or back slot on the main circuit board until it is plugged in The top of the board should be lined up with the slot on the TCD pallet Plugs into main board Fr
6. erence regulators nonEPC detectors Installing the makeup and reference regulators nonEPC detectors 1 Install a screw in the front or back position of the pneumatics carrier Do not tighten the screw Install a screw in the regulator bracket Do not tighten the screw 2 Place the regulators in the front or back position of the pneumatics carrier Tighten the screws with a T 20 Torx screwdriver 3 Connect the tube on the makeup gas regulator to the fitting labeled MU on the flow manifold Tighten the nut fingertight then use the 7 16 inch wrench to tighten it 3 4 of a turn Follow the same procedure for connecting the reference gas regulator to the fitting labeled Reference on the flow manifold Installing the makeup and reference regulators nonEPC detectors 4 Locate the RFI and pneumatics covers that you removed in Preparing the GC Cut here RFI cover Positioning and securing the detector Positioning and securing the detector 1 Remove the round metal cutout on the oven top and the square plastic cutout in the electronics carrier in the front or back detector position if necessary Cut the metal circle with diagonal cutters so that the nibs are connected to the piece removed Cut the plastic in six places with diagonal cutters Discard the cutouts 2 Lift out the die cut insulation plug from the front or back detector position if necessary Caution Be careful to remov
7. ewdriver slide the cover to the left until it disengages from the top rear panel and remove it 4 Ifyou are installing a nonEPC detector remove the detector cover plate from the front or back position by loosening the two screws with a T 20 Torx screwdriver and sliding the plate up and off Preparing the GC 5 Loosen the five screws in the top rear panel with a T 20 Torx screwdriver Grasp the panel at each end and gently lift it up and then away from the GC Be careful not to disrupt the supply tubing Pneumatics cover RFI cover Detector cover plate Loosen five screws of 8 m y Penni Ed one ber Iu 6 Raise the gray plastic top cover with the holes and ventilation slots to the vertical position Examine the hinge in the right rear corner e Early 6890 models The hinge is a metal bracket attached to the oven top Pull the clip at its top toward you to release the hinge pin Push the pin to the left to release the cover Raise the right side of the cover and remove it Preparing the GC e Current 6890 models Raise the right side of the cover and lift to remove it Caution Board components can be damaged by static electricity use a properly grounded static control wrist strap when removing the electronics covers 7 Remove the electronics side and top covers Side cover Press rear tab under Top cover K cover and
8. f lift off Loosen screws Installing the flow manifold Installing the flow manifold This section describes installation of the current version of the pneumatics module For information on the earlier version see the Appendix Caution It is not necessary and not advisable to separate detectors from their pneumatics modules Doing so can cause leaks Although handling the detector and pneumatics module as a unit is awkward it can be managed 1 Locate the correct slot for the pneumatics module e Detector in the front position Use the second slot from the left as viewed from the back of the GC e Detector in the back position Use the third slot from the left as viewed from the back of the GC Caution Hold the manifold by its support bracket to avoid damaging the components 2 Route the ribbon cable behind the manifold assembly as shown in Figure 1 Slide the manifold and bracket assembly into the slot until the bracket seats flush against the end of the rails See Figure 2 TAO SMO A 4301 OG100N Back view of manifold Manifold installed with cable routed to left Figure 1 Routing the ribbon cable Installing the flow manifold Bracket is flush with carrier rails Route tubing along this path Figure 2 Manifold after installation 3 Secure the manifold in place using a Torx T 20 screw from the front of the pneumatics chassis Route the gas tubing over the top of the
9. l 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 WARNING A warning calls attention to a condition or possible situation that could cause injury to the user CAUTION A caution calls attention to a condition or possible situation that could damage or destroy the product or the user s work A Indicates a hot surface Indicates earth ground terminal Sound Emission Certification for Federal Republic of Germany Sound pressure Lp lt 68 dB A During normal operation At the operator position According to ISO 7779 Type Test Schallemission Schalldruckpegel LP lt 68 dB A Am Arbeitsplatz Normaler Betrieb Nach DIN 45635 T 19 Typpriifung Agilent Technologies Inc 2850 Centerville Road Wilmington DE 19808 1610 USA Overview Overview This document contains the procedure for installing a thermal conductivity detector TCD on an Agilent 6890 Gas Chromatograph hereafter referred to as the GC Review the safety information on the inside front cover before following this procedure Parts list EPC TCD Two screws for attaching the detector to the oven top Top insulation Bottom insulation NonEPC TCD Two screws for attaching the detector to the oven top Makeup a
10. m Zero the detector s pressure sensors a b c d Press Options scroll to Calibration and press Enter Scroll to Front detector or Back detector and press Enter Scroll to Reference zero and press On Scroll to Makeup zero and press On 4 Turn off your GC and unplug the power cord Plumb the reference makeup gas to your detector See the 6890 Site Preparation and Installation Manual for instructions Reinstall the RFI cover Replace the pneumatics top cover Plug in the GC again and turn it on 21 Appendix Installing the pneumatics module early version Appendix Installing the pneumatics module early version Caution Board components can be damaged by static electricity use a properly grounded static control wrist strap when removing the electronics covers 1 From the back of the GC locate the pneumatics carrier Pneumatics carrier 2 Ifyou are installing a detector in the front position and an inlet is installed in the back position unplug the back inlet ribbon cable Unlock the connector by pushing the tabs away from the center Connector locations Back detector Front detector Back inlet Front inlet 22 Appendix Installing the pneumatics module early version 3 Locate the troughs in the flow manifold and the ridges in the pneumatics carrier Slide the flow manifold into the carrier lining up the ridges and troughs Back detector
11. nd reference gas regulator Two screws for installing the makeup and reference gas regulator Top insulation Bottom insulation Tools Electrostatic protection such as a grounded wrist strap part no 9300 0969 for large wrists or part no 9300 0970 for small wrists T 20 Torx screwdriver Diagonal cutters Small flat blade screwdriver 7 16 inch wrench nonEPC detectors only Overview Steps Preparing the GC Installing the flow manifold Installing the regulator nonEPC detectors only Positioning and securing the detector Connecting the detector Routing the tubing Restoring the GC to operating condition CO AG OF Re OO NM oe Calibrating your detector EPC detectors only Overview Makeup and reference gas regulators nonEPC only Switching valve leads Printed circuit board Thermal conductivity detector Power switch Preparing the GC WARNING Preparing the GC Hazardous voltages are present in the mainframe when the GC is plugged in Avoid a potentially dangerous shock hazard by unplugging the power cord before removing the side panels 1 Turn off the GC and unplug the power cord Allow time for all heated zones to cool and then turn off supply gases at their sources From the back of the GC see the figure on the next page 2 Unsnap and lift off the pneumatics top cover 3 Remove the RFI cover Remove the screw with a T 20 Torx scr
12. ont detector slot TCD board Rear detector slot Connecting the detector 2 Attach the filament leads to the TCD board in the two left most positions of the connector block Insert a small flat blade screwdriver in the rectangular slot and depress it while you insert the filament lead in the round hole Polarity does not matter Filament leads APRT leads thick black thin with pins Connect Filament Connect APRT Connector block TCD board Caution If the APRT is not properly connected to the detector interface card filament burnout can occur 3 Similarly connect the APRT leads to the two right most positions in the connector block Polarity does not matter 4 Connecting the detector Connect the heater sensor wire to the square connector closest to the front or back detector Heater sensor wire Heater sensor connector back position Heater sensor connector front position 17 Connecting the detector From the right side of the GC locate the switching valve leads Route the leads across the main board and connect them to the TC board 5 EN l Switching valve leads N Vv sg ee ae EAA TCD board 18 Routing the tubing Routing the tubing Route the tubing from the flow manifold over the top of the pneumatics carrier through one of the slots to the detector
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Agilent 6890 Accessories Installation Guides (G1532 90337 TCD)