agilent g3486a cft modulator · pdf file4 installation instructions agilent g3486a cft...

Agilent G3486A CFT Modulator

For the Agilent 7890A Gas Chromatograph

Installation Instructions

Parts Supplied

Table 1 CFT Modulator accessory parts

Description Quantity

Oven bracket, half-wide 1

T-screw for oven bracket retainer 1

Screw-machine assembly M3 × 0.5 10 mm long (mounting CFT devices to oven bracket) 8

Capillary column spring clip 4

CFT modulator flow assembly 1

Sensor tube insulation (for sealing modulator tubing through oven sidewall) 1

CFT modulator printer circuit board (PCB) 1

Switching valve 1

Switching valve clamp 1

Switching valve bracket 1

Cap screw M3 × 10 mm long (modulator valve flange to switching valve bracket) 2

Screw T-20, M4 × 8 mm long (switching valve bracket to GC sidewall) 1

Switching valve actuator cable 1

Screw-machine M3 × 0.5 12-mm long pan head (Switching valve clamp) 1

Primary column 30 m × 0.25 mm × 0.25 µm DB-5ms 1

Secondary column 5 m × 0.25 mm × 0.15 µm INNOWAX 1

Parafilm 1

CFT Accessories CD 1

Ship Kit

Ferrule graphite 320 µm 0.15 mm id 10-pack 1

Capillary tubing cutter, 4/pk 1

Siltite ferrules, X 0.4 mm ID 2

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Ship Kit (continued)

Plug for CFT manifold or unions 3

Internal column nut for CFT products 6

Column storage fitting 4

10-pk, ss wire 0.01-inch diameter × 40 mm 1

Magnifier, 3x, 6x, paddle, plastic 1

Ferrule pre-swage tool, capillary flow 1

5 µL syringe 1

6-pack O-rings 1

Low boiling point calibration sample no. 2 1

Table 1 CFT Modulator accessory parts (continued)

Description Quantity

Parts Identification

Figure 1 CFT modulator flow assembly

Switching valve flange

PCM channel 1 flange

CFT modulator



Installation Instructio

Figure 2 Switching valve, switching valve clamp, switching valve bracket, switching valve actuator cable, and PCB.

Switching valve bracket

Switching valve

Switching valve clamp

PCB

Switching valve actuator cable

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Figure 3 Half-wide oven bracket, primary and secondary columns, and column clips

Half-wide oven bracket

Primary column

Column clips

Secondary column

CFT modulator attachment screws

T-screw

Tools Required

• T-10 and T-20 Torx driver

• Open-end wrenches

Installation Procedure

This procedure explains how to install the CFT modulator accessory on the Agilent 7890A Gas Chromatograph (GC). This kit requires that the Agilent G3471A Pneumatic Control Module (PCM) is installed on the 7890A GC and that channel 1 of the PCM is available exclusively for CFT modulator use.

Prepare the GC

1 Turn off the GC and unplug the power cord.

2 Allow time for the oven and heated zones to cool.

Installatio
n Instructions



3 Turn off all gas supplies.

4 Remove the detector cover.

5 Remove the pneumatics cover.

6 Remove the top right electronics cover by loosening one screw located in the left front side. Open the cover 90 degrees and lift up on the right side. Slide the cover off the pin on the left side.

7 Remove the electronics side cover by unscrewing the single top screw. Slide the cover to the right and lift off.

8 Remove the left side GC cover by unscrewing and then sliding it back and lifting it off.

9 Put on the ESD wrist strap and attach the ground to the GC sheet metal frame for electrostatic protection.

Install the modulator control board

1 Remove the modulators PCB board from its static control bag.

2 Position the modulators PCB board in the rightmost frame position if available. Any available frame in one of the 3 locations is permitted for locating the PCB.

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3 Align the board with the frame so that the captive thumbscrew is in the upper right-hand corner and the circuits are facing out.

4 Starting with the board notches below the retaining hooks on the GC frame, slide the board up so that all slots engage all hooks, the board lies flat and evenly on the frame, and the captive thumbscrew aligns directly over the screw hole.

5 Tighten the captive thumbscrew to complete the PCB installation. See Figure 4 for correct board orientation.

6 Attach the communications cable labeled AUX DET2 to the PCB as shown in Figure 5.

Figure 4 Installing the CFT modulator PCB

Thumbscrew

Ins
tallation Instructions



7 Attach the switching valve actuator cable to the PCB as shown in Figure 5.

8 Route the switching valve actuator cable from the PCB to the left side GC location shown in Figure 6. Follow the same path and secure the wire using the same grommets that the communication cable uses. See Figure 7.

Figure 5 CFT modulator PCB cables

Communications cable

Switching valve actuator cable

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9 Replace the top and right side electronics covers.

Figure 6 Routing the actuator cable

Figure 7 Secure the actuator cable with existing grommets

Route for cable

Grommet

Installa
tion Instructions


Create an opening in the oven sidewall


1 Press in on the indicated area shown in Figure 8 until the cutout tilts inward slightly.

Figure 8 CFT modulator oven wall cutout tilted

Press here

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2 Using a screwdriver, clear a hole through the insulation where indicated in Figure 9. The hole passes at a sharp rearward and upward angle as it passes from the inside oven wall to the outside as shown in Figure 10.

Figure 9 CFT modulator oven wall cutout

Figure 10 CFT modulator oven wall cutout

Clear insulation

Screwdriver exit hole

In
stallation Instructions


Install the modulator


1 Install the oven bracket to the left-rear side oven wall using the T-screw.

2 Cover the tubing connector flanges for the switching valve and PCM module on the new modulator assembly with Parafilm. This prevents contamination with insulation as the line is pulled through the oven sidewall.

Figure 11 Oven bracket installation

Oven bracket

T-screw

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3 Ensure the two open ports on the modulator plate are plugged with the supplied CFT plugs before installing in the oven.

Figure 12 Covering the tubing connector flanges with Parafilm

Figure 13 Modulator plate with plugged ports

Plugged ports




4 Starting with the PCM attachment flange, put the modulator’s tubing lines through the side wall opening.

5 Attach the switching valve bracket to the left side of the GC. The tab on the bracket fits in the oval slot and the bracket is held by the single screw.

Figure 14 Putting the CFT modulator tubing through the oven sidewall

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6 Attach the CFT modulator to the oven bracket using the 4 M3 × 10 mm-long screws. The tubing lines welded to the modulator must face the front of the GC.

Figure 15 CFT modulator attachment with column connections plugged

M3 × 10 mm screws

Lines must face this direction




7 Attach the switching valve to the switching valve manifold using the M3 × 12 mm-long screw and switching valve clamp.

8 Secure the switching valve manifold to the GC bracket using two M3 × 10mm-long screws.

Figure 16 Switching valve bracket attachment

Figure 17 Switching valve attachment to modulator tubing

Tab on bracket

Screw

Switching valve bracket

M3 × 12 mm screw

Switching valve clamp

Switching valve

Switching valve manifold

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9 Tilt the cutout used to pass the modulator tubing and make it flat again with the left side of the GC. Pack the hole created for the modulator tubing with insulation inside and outside the oven wall.

10 Connect the switching valve cable to the EPC module switching valve connector.

11 Remove the EPC module brackets by loosening the captive screws and lifting the brackets off.

Figure 18 Switching valve attachment to bracket

Figure 19 Bracket locations

M3 × 10mm-long screws

Brackets

Insta
llation Instructions



12 Raise the PCM module from its mounting slot, disconnect the communications cable, and lay the module on top of the GC.

13 Route the PCM tubing line from the switching valve to the modulator’s PCM module in the slotted passage through the EPC module area.

Figure 20 Channel 1 attachment flange

Attachment flange

Communications cable

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14 Attach the tubing supply line run to the modulator’s switching valve to the PCM channel 1 attachment flange using a new O-ring. See Figure 20.

15 Place the PCM module near its mounting slot, attach the previously removed communications cable, and lower the module into its slot.

16 Finish routing the modulator tubing in the slotted channels to clear the EPC module brackets. See Figure 21.

17 Install the EPC module brackets with the previously removed screws.

18 Plug in the GC and turn it on.

Figure 21 Modulator tubing route

Tubing route

Configure the GC for CFT modulator

Configuration is done in the field for the CFT modulator accessory. These procedures only cover the specifics required for a CFT Modulator using a PCM located in the front right mounting slot, a front mounted split/splitless inlet, and front mounted FID. For configuration topics not covered here, see the Agilent 7890A GC Advanced User Guide.

To configure the PCM

1 Unlock the GC configuration. Press the [Options] key, select Keyboard & Display and press the [Enter] key. Scroll down to Hard Configuration Lock and press the [off] button.

2 Press [Config] [Aux EPC #] and select PCM C. If not mounted in the front right slot it will be identified as PCM A or PCM B.




3 With Unconfigured: selected, press the [Mode/Type] key on the GC keypad and with Install PCM C selected, press [Enter].

If this PCM is already configured, skip to step 6.

4 When the GC prompts to power cycle the GC, press the [Options] key and select Communications. From this option scroll down and select the reboot option and press [Enter] on the GC keypad. This soft reboot keeps the GC configuration unlocked for subsequent steps. Power cycling the GC forces you to unlock the GC configuration on power-up.

5 Press [Config] [Aux EPC #] and select PCM C.

6 Scroll to Gas type, press [Mode/Type] and select H2.

To configure the inlet

1 Press [Config] [Front Inlet].

2 Scroll to Gas type, press [Mode/Type] and select H2.

To configure the detector

1 Press [Config] [Front Detector].

2 Scroll to Makeup gas type, press [Mode/Type] and select N2.

To configure the CFT modulator controller

1 Unlock the GC configuration. Press the [Options] key, select Keyboard & Display and press the [Enter] key. Scroll down to Hard Configuration Lock and press the [off] button.

2 On the GC keypad press [Config] and from the displayed list, scroll to the 2 Dimensional GC Valve and press [Enter] to select it.

3 With Unconfigured: selected, press the [Mode/Type] key on the GC keypad and with Install 2D GC Valve selected, press [Enter].

4 When the GC prompts to power cycle the GC, press the [Options] key and select Communications. From this option scroll down and select the reboot option and press [Enter] on the GC keypad. This soft reboot keeps the GC configuration unlocked for subsequent steps. Power cycling the GC forces you to unlock the GC configuration on power-up.

5 Press the [Valve #] key to display the parameter settings of the 2D GC Valve. If another valve is configured on the GC, its on/off control is displayed before the 2D GC Valve parameters. See the operation section for an explanation of the parameter settings.

To configure the oven

1 Press [Config] [Oven].

2 Scroll to Maximum temperature and enter a value of 275 °C.

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To configure the columns

This procedure assumes a factory installation with a S/SL inlet and FID in the front mounted location, and a PCM mounted in the right rear slot (slot 6) making its ID PCM C. The column types and lengths are as installed at the factory. If a column has been trimmed in length, enter the correct actual length.

1 Press [Config] [Column 1].

2 Enter a length of 30 M, a diameter of 250 µ, and a film thickness of 0.5.

3 Scroll to Inlet, press [Mode/Type] and select Front Inlet.

4 Scroll to Outlet, press [Mode/Type] and select PCM C.

5 Scroll to Thermal zone, press [Mode/Type] and select GC Oven.

6 Press [Config] [Column 2].

7 Enter a length of 5 M, a diameter of 250 µ, and a film thickness of 0.15.

8 Scroll to Inlet, press [Mode/Type] and select PCM C.

9 Scroll to Outlet, press [Mode/Type] and select Front Detector.

10 Scroll to Thermal zone, press [Mode/Type] and select GC Oven.

Leak testing the installed modulator

Leak test the pneumatic system for the modulator before installing the columns.

Ensure the two open ports on the modulator plate are plugged with the supplied Siltite plugs. See Figure 13 on page 12.

1 With the H2 supply line disconnected from the PCM, zero the pressure sensor. On the keypad press [Options], select Calibration, and press [Enter]. Scroll to the modulator’s PCM and press [Enter]. Scroll to the Zero Pressure line and press [On/Yes] to zero the pressure.

2 Attach the H2 supply line to the PCM channel 1 supply connector (¼-inch NPT).

3 Open the H2 supply gas line to the modulator’s PCM.

4 Press [Aux EPC #], scroll to the modulator’s PCM and press [Enter].

5 Enter a pressure of 25 PSIG and press [On/Yes] to activate the PCM.

6 Zero the flow sensor. On the keypad press [Options], select Calibration, and press [Enter]. Scroll to the modulator’s PCM and press [Enter]. Scroll to the Zero Flow line and press [On/Yes] to zero the flow sensor.

7 Press [Aux EPC #], scroll to the modulator’s PCM and press [Enter]. Press [Off/No] to turn off the PCM, then manually close the H2 supply line valve.

8 Observe the PCM pressure for 10 minutes or until the pressure drops by more than 0.7 PSI. If the pressure does not drop by more than 0.7 PSI the




modulator assembly passes the leak check. If it does not pass, check for and repair leaks, then run the leak test again to confirm a leak free modulator.

9 Replace the top cover over the EPC module area.

10 Remove the large plastic knockout cover for the MSD transfer line on the left side GC cover panel and replace the left side GC panel.

Install the columns

WARNING When using hydrogen as a carrier gas, remove the large round cover for the MSD transfer line located on the GC left side panel. In the unlikely event of an explosion, this cover may dislodge.

Parts required

Column 1 - 30 m × 0.25 mm × 0.25 µm DB-5 ms

Column 2 - 5 m × 0.25 mm × 0.15 µm INNOWAX

Column hanger clip kit

Universal column nut (SSL inlet)

Ferrule for universal column nut

Column nut (for FID)

Ferrule for FID column nut

Internal column nuts (for flow modulator)

Siltite metal ferrules (for flow modulator)

To install the CFT Modulator columns

1 If necessary, install the 4 column clips to the oven heater shroud by first loosening the four screws located in the corners of the heater shroud, slide the clips under the screw heads and snug (but not tighten) the screws.

2 If necessary, remove the CFT plugs from the modulator.

3 Install column 1 (the longer column) using the 4 column clips. Center the column basket with the fan opening in the heater shroud and tighten the 4 clip screws. Uncoil sufficient length of column from one end to reach the inlet and from the other end to reach the flow modulator.

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4 Attach column 1 (the longer column) to the assigned split/splitless inlet using a universal column nut and ferrule. See the maintenance manual.

5 Attach the other end of column 1 to the load connection (Figure 23 top port) on the modulator using a internal nut and Siltite ferrule. Use the supplied pre-swage tool and see the maintenance manual for instructions on making Siltite connections.

Figure 22 Column 1 attached to heater shroud




6 Install Column 2 using column clips on the column 1 basket to attach to column 2 basket. Uncoil sufficient length of column from one end to reach the FID and from the other end to reach the flow modulator.

Figure 23 CFT modulator plate column attachments

Figure 24 Column 2 attached to column 1 basket

Column 1 attachment

Column 2 attachment

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7 Attach column 2 to the assigned FID using a column nut and ferrule. See the maintenance manual.

8 Attach the other end of column 2 to the injection connection (Figure 23 bottom port) on the modulator using a internal nut and Siltite ferrule. Use the supplied pre-swage tool and see the maintenance manual for instructions on making Siltite connections.

To Complete the modulator installation

Follow the instructions in the Checkout Procedure of the CFT Modulator User Guide to verify the correct operation of the modulator system.

Warranty

The material contained in this document is provided “as is,” and is subject to being changed, without notice, in future editions. Further, to the maximum extent permitted by applicable law, Agilent disclaims all warran-ties, either express or implied, with regard to this manual and any information contained herein, including but not limited to the implied warranties of merchantability and fitness for a particular purpose. Agilent shall not be liable for errors or for incidental or consequential damages in connection with the furnishing, use, or performance of this document or of any information contained herein. Should Agilent and the user have a separate written agreement with warranty terms covering the material in this document that conflict with these terms, the warranty terms in the separate agreement shall control.

© Agilent Technologies, Inc. 2008Printed in USA and China

First edition, November 2007Second edition, March 2008

Agilent Technologies, Inc.2850 Centerville Road

Wilmington, DE 19808-1610 USA

G3486-90015

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