User's Manual

SE-9639 Franck-Hertz Experiment

012-14264A

Replace the Argon Tube

• Use a flat-blade screwdriver to remove the two small screws that hold the back

plate onto the argon tube enclosure.

• Use a small flat-blade screwdriver to pry the back panel off of the enclosure.

• Pull up on the elastic pressing spring and rotate it off the argon tube.

• Gently pull out the argon tube.

• Then, install a new tube and replace the elastic pressing spring.

• Finally, close the case and replace the two small screws.

Fuse Replacement

• Disconnect the power cord from the instrument.

• Open the fuse cover and remove the fuse. (The fuse is inside a tray. Use a small

screwdriver or other tool to pry the tray open.)

• Replace the fuse(s). Use the same type of fuse (250 V T2A).

• Reconnect the power cord and turn on the instrument.

• If the problem persists, contact Brolight Corporation for service.

Argon Tube Specifications

Filling gas argon

Filament voltage  6.3 V DC

Accelerating voltage  100 V DC

Wave crest (or trough) number 6

Life span  2000 hours

• Note: The tube is a thin-walled, evacuated glass bulb. Handle with

care! Do not expose the tube to mechanical stress or strain.

Note: Replace the argon tube with the same type: Model SE-9645 Franck-Hertz Ar-Tube.

The fuse is inside a

tray. Open the

cover to remove

the fuse.

WARNING

To reduce the risk of electric shock or

damage to the instrument, turn the

power switch OFF and disconnect the

power cord before replacing a fuse.

Fuse Cover Tray

Pry

here

Note: Replace the burned fuses with new fuses of the same type. (One spare fuse is included.)