Agilent Technologies NPD Installation Manual Download Page 3

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Overview

This section reviews the procedure for installing a nitrogen-phosphorus

detector (NPD) on an Agilent 6890 Gas Chromatograph (hereafter referred

to as the GC.) Before following this procedure, refer to the safety

information on the inside back cover.

Parts List

EPC

•

NPD assembly: capillary optimized or adaptable

•

Top and bottom insulation

•

Nutwarmer cup and insulation (for adaptable NPD only)

NonEPC

•

NPD assembly: capillary optimized or adaptable

•

Top and bottom insulation

•

Nutwarmer cup and insulation (for adaptable NPD only)

•

Makeup gas regulator

•

Two machine screws

Required Tools

•

Electrostatic protection such as a grounded wrist strap (part no.
9300-0969, large or part no. 9300-0970, small)

•

T-20 Torx screwdriver

•

Diagonal cutters

•

7/16-inch wrench (nonEPC detectors only)

Summary of Contents for NPD

Page 1: ...Installation Guide Nitrogen Phosphorus Detector on 6890 GC Accessories G1575A G1576A G1594A G1599A ...

Page 2: ...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 recycl...

Page 3: ...embly capillary optimized or adaptable Top and bottom insulation Nutwarmer cup and insulation for adaptable NPD only NonEPC NPD assembly capillary optimized or adaptable Top and bottom insulation Nutwarmer cup and insulation for adaptable NPD only Makeup gas regulator Two machine screws Required Tools Electrostatic protection such as a grounded wrist strap part no 9300 0969 large or part no 9300 0...

Page 4: ...ling the makeup gas regulator nonEPC detectors only 4 Positioning and securing the detector 5 Connecting the detector 6 Routing the tubing 7 Installing the nutwarmer cup adaptable NPD only 8 Restoring the GC to operating condition 9 Calibrating your detector EPC detectors only ...

Page 5: ...Overview 3 Nitrogen phosphorus detector Power switch Makeup gas regulator nonEPC only Flow manifold Printed circuit board early version ...

Page 6: ... to cool and then turn off supply gases at their sources From the back of the GC see the next figure 2 Unsnap and lift off the pneumatics top cover 3 Remove the RFI cover Remove the screw with a T 20 Torx screwdriver slide the cover to the left until it disengages from the top rear panel and remove it 4 If you are installing a nonEPC detector remove the detector cover plate from the front or back ...

Page 7: ...d 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 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 Current 6890 models Raise the right side of the cover and remove it Pneumatics cover ...

Page 8: ...nics side cover Loosen the two captive screws at the top slide the panel to the rear and lift it off 8 Remove the electronics top cover Push in on the tab underneath the back of the cover and lift it off Captive screws Push clip under cover ...

Page 9: ...Caution Always hold the manifold by its support bracket to avoid damaging board components 1 Route the ribbon cable behind the manifold assembly as shown in Figure 1 Then slide the manifold and bracket assembly into the slot until the bracket seats flush against the end of the rails See Figure 2 Figure 1 Routing the ribbon cable Back view of manifold Manifold installed with cable routed to left ...

Page 10: ... valves and keep it from being pinched against 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 4 From the front secure the manifold to the chassis using the Torx T 20 screw Figure 3 Captive screws and tubing Bracket is flush with carrier rails Front capt...

Page 11: ...ther manifolds or accessories installed in the GC See Figure 4 Figure 4 Top rear panel cutouts 6 Place the top rear panel on its left most mounting screw Work from left to right and use the screw as a hinge slide each manifold ID tag through its cutout in the panel When all the tags are through the panel finish installing the panel on the GC 7 Install the RFI shield the pneumatics cover and the de...

Page 12: ...Installing the flow manifold 10 8 Connect the source gas lines to the manifold Figure 5 Gas line connections 9 Restore gas pressures and leak test the fittings ...

Page 13: ...crew in the makeup gas regulator Do not tighten the screw 2 Place the makeup gas regulator 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...

Page 14: ...at you removed in Preparing the GC Remove the front or back rectangular cutout on the cover Use diagonal cutters to cut the metal or work the cutout back and forth until it breaks free from the cover 5 Locate the pneumatics cover that you removed in Preparing the GC Remove the appropriate oval label from the cover Makeup gas regulator Air Hydrogen Cut here Back Front Back Front ...

Page 15: ...e 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 remove only the insulation within the scribed circle 3 Carefully remove the scribed circle of insulation from the oven top t...

Page 16: ...a screwdriver Rotate the screwdriver around the scribed circle to remove excess insulation Clean up any pieces of insulation that fall inside the oven 4 Lower the detector pallet into the cavity Be sure that the insulation is in place Partially tighten the four screws with a T 20 Torx screwdriver Retighten all the screws to snugness Captive screws Insulation Pallet ...

Page 17: ... electricity use a properly grounded static control wrist strap when handling the board 1 Remove the PC board from its static control bag slide it into the front or back slot on the main circuit board and plug it into the main board Back detector slot Front detector slot Plugs into main board PC board ...

Page 18: ...Connecting the detector 16 2 Attach the bead and signal cables to the PC board Signal cable Bead cable Signal connector Bead connector PC board ...

Page 19: ...g the detector 17 3 Connect the heater sensor cable to the square connector closest to the front or back detector Heater sensor cable Heater sensor connector back position Heater sensor connector front position ...

Page 20: ...Routing the tubing 18 Routing the tubing Route the tubing from the flow manifold through the slots in the top of the carrier to the detector area Front detector tubing Back detector tubing ...

Page 21: ...ation in the cup 2 Push the wire spring lever at the bottom of the cup to the right to uncover the hole 3 From inside the oven place the cup over the detector fitting so that the top of the cup touches the top of the oven 4 Release the spring Make certain the spring fits in the groove of the detector fitting ...

Page 22: ... to the setpoint values 7 If you have an EPC detector zero the pressure sensors a Make certain that your detector and makeup gases are not connected to your detector b Press Options and scroll to Calibration Front detector or Back detector c Scroll to Oxidizer zero and press On d Scroll to H2 zero and press On e Scroll to Makeup zero and press On 8 Turn the GC off and unplug the power cord Plumb t...

Page 23: ... did not detect the new NPD check the following connections Detector card to main board Manifold to pneumatics board Heater sensor connector Bead cable to detector card Signal cable to detector card If you installed an EPC NPD but you have only temperature control for the detector check the connection between the flow manifold and the pneumatics board ...

Page 24: ...ic 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 the back position unplug the back inlet ribbon cable Unlock the connector by pushing the tabs away from the center Pneumatics carrier Connector locations Back detector Front detector Back inlet Fron...

Page 25: ... 4 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 Back detector Front detector Ridges Troughs Flow manifold Folded ribbon cable Open connector ...

Page 26: ...g the pneumatics module early version 24 5 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 ...

Page 27: ......

Page 28: ...Printed on recycled paper This product is recyclable Agilent Technologies Inc Printed in USA AUG 2001 G1534 90347 ...

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