Inspection of FID Collector and Replacement of Jet

Required devices

No.
Parts name
Category
Required number
Note
①
Tweezers
Other
1
②
Box Driver For FID Nozzles
Hydrogen Flame Ionization Detector (FID)
1
Options
③
FID Collector ASSY
Hydrogen Flame Ionization Detector (FID)
1
④
High-voltage electrode
Hydrogen Flame Ionization Detector (FID)
1
⑤
FID Nozzle ASSY STD 0.3
Hydrogen Flame Ionization Detector (FID)
1
φ0.3, standard
(for capillary column)
⑥
FID Nozzle ASSY 0.8
Hydrogen Flame Ionization Detector (FID)
1
φ0.8, for analysis of aqueous solution
(for capillary column)
⑦
FID Nozzle ASSY for packed column
Hydrogen Flame Ionization Detector (FID)
1
φ0.5, for packed column
⑧
Screwdriver
Other
1
⑨
Spanner
Other
1
⑩
Stylet Wire (0.1ｍｍｘ150ｍｍ)
Other
1

Procedures

Step 1

On the instrument monitor or workstation, check that the temperature of the column oven is lower than 40 °C, and check that the temperatures of the injection port and detector are 50 °C or lower.
After checking the temperatures, turn OFF the main power to the instrument.

Step 2

Remove the column installed on FID.

Step 3

Open INJ/DET cover.

Step 4

Remove the screw fixing the clamp for high voltage cable, and remove the clamp.

Step 5

Loosen the screw on the near side of the collector holding hardware.

Hint

You do not need to remove the screws.

Step 6

Remove the screw on the far side of the collector holding hardware.

Step 7

Slide the collector holding hardware clockwise.

Step 8

Raise the collector (③) to remove it.

Step 9

Turn the collector upside down and inspect the inside.

If the inside of the collector is contaminated, clean it. For cleaning, use a cotton swab or a soft brush moistened with organic solvent (acetone, hexane, etc.). Damage on the inside of the collector may cause noise.
When there is terrible dirt or rust, replace the collector.

Then, proceed to inspection and replacement of the jet.

Step 10

Remove the connector of the signal code.

Step 11

Raise the sheet metal fixing the high voltage electrode to remove it.

Step 12

Pull out the high voltage electrode (④).

If the high voltage electrode is contaminated, clean it. For cleaning, use a cotton swab or a soft brush moistened with organic solvent (acetone, hexane, etc.).
When there is terrible dirt or rust, replace the high voltage electrode.

Note

To replace the high voltage electrode, remove the connector (on the front of the instrument) of the high voltage cable (white).

Step 13

Loosen FID jet with a hexnut screwdriver (②).

Step 14

Remove FID jet with a tweezer.

Avoid applying an impact to the jet.
This may damage the quartz part.

Step 15

Inspect the jet on the tip of FID jet.

Hint

Use a jet with a large inner diameter in the following cases:

  • When using a capillary column with an inner diameter of 0.53 mm (inner diameter: 0.5 mm)

  • When measuring wide range concentration (inner diameter: 0.5 mm)

  • When the hydrogen flame is likely to be extinguished in analysis of substances such as aqueous solutions (inner diameter: 0.8 mm)

  • When the jet is blocked, such as during analysis of compounds with a high boiling point (inner diameter: 0.8 mm)

Step 16

Install FID jet.

Step 17

Tighten it until it is fixed securely with a hexnut screwdriver (②).

Step 18

Install the high voltage electrode (④).

Step 19

Install the sheet metal fixing the high voltage electrode.

Hook the sheet metal on the end of the spring, and push it for installation.

Step 20

Install the connector of the signal code.

Step 21

Install the collector (③).

Step 22

Return the collector holding hardware to the original position and install 2 screws.


Step 23

Install the clamp for high voltage cable, and fix the high voltage cable.

Step 24

Close INJ/DET cover.