Installation Guide
Thermal Conductivity Detector on a 6890 GC
Accessories G1563A, G1592A
Page 1: ...Installation Guide Thermal Conductivity Detector on a 6890 GC Accessories G1563A G1592A...
Page 2: ...ing 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...
Page 3: ...ing the detector to the oven top Top insulation Bottom insulation NonEPC TCD Two screws for attaching the detector to the oven top Makeup and reference gas regulator Two screws for installing the make...
Page 4: ...ng the flow manifold 3 Installing the regulator nonEPC detectors only 4 Positioning and securing the detector 5 Connecting the detector 6 Routing the tubing 7 Restoring the GC to operating condition 8...
Page 5: ...Overview 3 Thermal conductivity detector Makeup and reference gas regulators nonEPC only Switching valve leads Printed circuit board Power switch...
Page 6: ...l 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...
Page 7: ...he gray plastic top cover with the holes and ventilation slots to the vertical position Examine the hinge in the right rear corner Early 6890 models The hinge is a metal bracket attached to the oven t...
Page 8: ...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...
Page 9: ...the correct slot for the pneumatics module Detector in the front position Use the second slot from the left as viewed from the back of the GC Detector in the back position Use the third slot from the...
Page 10: ...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 c...
Page 11: ...el 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 9 Connect the source...
Page 12: ...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 t...
Page 13: ...Installing the makeup and reference regulators nonEPC detectors 11 4 Locate the RFI and pneumatics covers that you removed in Preparing the GC Cut here Back Front RFI cover Pneumatics cover Back Front...
Page 14: ...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 f...
Page 15: ...sing 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 piec...
Page 16: ...avity 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 scr...
Page 17: ...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 to...
Page 18: ...while you insert the filament lead in the round hole Polarity does not matter Caution If the PRT is not properly connected to the detector interface card filament burnout can occur 3 Similarly connec...
Page 19: ...g the detector 17 4 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...
Page 20: ...Connecting the detector 18 5 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 Switching valve leads TCD board...
Page 21: ...ing the tubing 19 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 area Back detector tubing Front detector tu...
Page 22: ...ctor has been properly installed you will see the following display 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...
Page 23: ...if you haven t already done so 2 Wait 15 minutes This allows your GC to reach thermal equilibrium 3 Zero the detector s pressure sensors a Press Options scroll to Calibration and press Enter b Scroll...
Page 24: ...c control wrist strap when removing the electronics covers 1 From the back of the GC locate the pneumatics carrier 2 If you are installing a detector in the front position and an inlet is installed in...
Page 25: ...up the ridges and troughs 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...
Page 26: ...talled 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 6 From the front of the GC secure...
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Page 28: ...Printed on recycled paper This product is recyclable Agilent Technologies Inc Printed in USA AUG 2001 G1532 90337...
