Replacement of FPD Interference Filter

Required devices

No.
Parts name
Category
Required number
Note
①
FPD FILTER ASSY, S (Blue)
Flame Photometric Detector (FPD)
1
②
FPD FILTER ASSY, P (Yellow)
Flame Photometric Detector (FPD)
1
③
FPD FILTER ASSY, Sn (Black)
Flame Photometric Detector (FPD)
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

Open INJ/DET cover.

 

Step 3

When using the photomul purge kit, disconnect the photomultiplier and the flow controller connector.

Step 4

Loosen 2 screws which connect the photomultiplier and the igniter.

Step 5

Remove photomultiplier.

Provide light shielding (aluminum foil, etc.) for photoreceptor of photomultiplier to prevent strong light from reaching it as possible.

Step 6

Remove O-ring.

Step 7

Remove interference filter.

Step 8

Check filter surface for dirt.

When filter surface is dirty, wipe it with a soft cloth, etc.

　FILTER ASSY,S (For sulfur)

　ILTER ASSY,P (For phosphorus)

　FILTER ASSY,SN (For tin)

Step 9

Install interference filter and then O-ring on photomultiplier.

There is a step height on the filter housing. Install it placing the side with the smaller diameter on the photomultiplier case.

Step 10

Fix 2 screws on photomultiplier temporarily.

Step 11

Connect photomultiplier with igniter, fix it securely with screws.

Step 12

When using the photomul purge kit, install the photomultiplier and the flow controller connector.

Step 13

Close INJ/DET cover.