THORLABS vytran PTR308 User Manual page 28

PTR308 Automatic Recoater with Linear Proof Tester
8.4. Proof Test System
Check Proof Test Calibration/Recalibration
The proof test calibration must be periodically checked to ensure that the correct load is being applied to the fiber.
If the proof tester is applying a greater load than expected, the process yield may be adversary affected due to
excessive proof test failures. If the proof tester is applying a load less than expected, the proof tested section of the
fiber may be weaker than required and could fail at a later time.
Checking and re-calibrating the proof tester requires special equipment and training. Contact an authorized
Thorlabs representative to learn more about calibration options.
Replace FHB Inserts
Replace the top or bottom insert by loosening the four (4) set screws securing them in place with a 0.035" hex key.
(One full turn counter-clockwise should be sufficient.) Remove the insert and clean the slot of the fiber holding block.
Install the new insert into the slot and center it within the fiber holding block. Lightly tighten the set screws while
applying downward pressure on the insert. Excessive force is not required to hold the inserts in place - DO NOT
OVERTIGHTEN.
8.5. Fuse Replacement
To replace a blown fuse, use a flat head screwdriver to open the fuse door by twisting it counter-clockwise. Pull out
the fuse drawer, replace the fuse, then push the fuse drawer back in place and twist it clockwise using the
screwdriver.
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Figure 17 Replace FHB Inserts
Chapter 8: Maintenance
TTN123729-D02