35,0(6Supplement to the Operating Manual
FocusMonitor FM+ HPD
1Operation of the device with a conventional measuring tip

The device can optionally be operated with a conventional measuring tip with pinhole aperture as used in theFM+ device.
X Read the information in this document before operating the device with a conventional measuring tip:
••
•
•

2

Chapter 2 „Suitable conventional measuring tips“ on page 1
Chapter 3 „Changing the rotating disk and inserting the conventional measuring tip“ on page 2
Chapter 4 „Measuring with the LaserDiagnosticsSoftware LDS“ on page 7
Chapter 5 „Distance of the pinhole aperture to the reference plane“ on page 8

Suitable conventional measuring tips

NOTICE
Damage / destruction of the device or the measuring tips
The DFIG-PS+HPD detector is permanently installed in the device and must not be changed.
The conventional measuring tips suitable for this detector can be exposed to lower power
densities than the FS³.
X Operate the device only with the detector installed at the factory.
X Use only the suitable conventional measuring tips and observe their limit values.
The following conventional measuring tips are suitable for use in the FM+ HPD:
• NIR high div• DiodeThe specifications of the suitable measuring tips are included in the operating manual of the FocusMonitor FM+
measuring device (revision 03/2019 EN).
1. Go to the download section of the PRIMES website:
https://www.primes.de/en/support/downloads/operating-manuals.html
2. Read chapters 18.2 to 18.4 (p. 47 – 51).

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FocusMonitor FM+ HPD
3Changing the rotating disk and inserting the conventional measuring tip

CAUTION
Burns due to hot components
Parts near the rotating unit can be hot due to scattered radiation.
X Do not change the rotating disk directly after a measurement.
X Let the device cool down for an adequate period of time. The cooling time varies dependingon the laser power and the irradiation time.

NOTICEDamage / destruction of the measuring tip
Touching the glass measuring tip of the FS³ can lead to burn-in by the laser radiation at thepoints of contact. Burn-in lead to damage or cracking of the glass measuring tip.
The very small pinhole of the measuring tip can quickly become blocked by dirt particles orwhen touched with the bare hands.
X Do not touch the glass measuring tip of the FS³ / the pinhole.
X Wear powder-free latex gloves during assembly and ensure that the environment is free ofdirt and dust.

NOTICE
Damage / Destruction of the rotating unit
The rotation characteristics may change if screws other than those installed at the factory /supplied are used to fasten the rotating disk. This will affect the functionality of the device
and lead to damage.
X Store a rotating disk and the associated screws carefully after removal. It must always beevident that the disk and screws belong together.
X When mounting a rotating disk, only use the screws installed at the factory / supplied.
Even when operating with a conventional measuring tip, the device can only be used in standard
installation and not in upside down installation. Therefore, observe the correct mounting position of
the conventional measuring tip.

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35,0(6Supplement to the Operating Manual
FocusMonitor FM+ HPD
1.
••
••

Have the following ready:Device with FS³ installed (device switched off, connections removed)
Torx T8 and T10 screwdrivers (hexalobular internal profile)
Conventional measuring tip and associated rotating disk
Powder-free latex gloves

2.

Put on the latex gloves.

3.

Turn the device upside down so thatthe base plate of the traversing carrier
is facing upwards.

4.

Base plate

Remove the dust protection.

Dust protection
5.

Remove the 6 T8 countersunk screws
from the base plate.

6.

Remove the base plate.

7.

Carefully identify the squarely arranged 4 T10 countersunk screws onthe FS³.
The other screws must never beopened!

8.

Remove the 4 T10 countersunkscrews.

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35,0(6Supplement to the Operating Manual
FocusMonitor FM+ HPD
9.

Carefully lift the FS³ vertically upwards
out of the rotating unit.

10. Store the rotating disk and the associated screws carefully. If possible,
use the Primes storage tray for thispurpose.

Storage tray

The glass measuring tip of the FS³
must always be protected fromtouch and dirt.
It must always be evident that thedisk and screws belong together.

11. Have the conventional measuring tip
and the corresponding rotating disk
ready. The cover and retaining plate of
the rotating disk must face upwards.

Rotating disk

Bore for retaining plate
The pinhole is placed at thepointed end of the curved side.
Any contact with the pinhole
should be avoided!
12. Remove the 2 T8 countersunk screws
from the retaining plate.

Measuring tip
Cover
Retaining plate,
T8 screws

13. Pull the retaining plate up slightly until
it loosens. Then remove it.
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35,0(6Supplement to the Operating Manual
FocusMonitor FM+ HPD
14. Insert the measuring tip so that theflat side is facing upwards.

The device can only be used if themeasuring tip is mounted the rightway round.
Flat sideupwards
15. Remove the 4 T8 countersunk screws
from the cover of the rotating disk.

T8 screws(cover)16. Remove the cover.
17. Remove the squarely arranged 4 T10
cylinder head screws from the rotating disk.
The other screws must never beopened!

T10 cylinder
head screws

Cover

18. Hold the rotating disk against the rotating unit so that the dowel is above
the bore.
19. Place the rotating disk on the rotating
unit. The dowel must engage so thatthe rotating disk fits tigthly.

Dowel

Bore

20. Insert the 4 T10 cylinder head screws
and fasten them hand-tight.
Only the screws supplied may be
used to fasten the rotating disk!

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FocusMonitor FM+ HPD
21. Insert the cover into the rotating disk.
On the exterior there are conicalbores.

22. Insert the 4 T8 countersunk screws
and fasten them hand-tight.

Exterior:
conical bores

23. Place the guide groove of the retaining plate at a slight angle under thecover of the rotating disk.

Conical bores

On the exterior there are conicalbores.
24. Press the retaining plate down.

Guide groove

T8 countersunk screws

25. Insert the 2 T8 countersunk screws
and fasten them hand-tight.
26. Insert the base plate.
27. Insert the 6 T8 countersunk screws
and fasten them hand-tight.

28. Insert the dust protection.
The top side with the TOP marking must face downwards.

29. Turn the device upside down.

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4

Measuring with the LaserDiagnosticsSoftware LDS

Note the following supplementary information to the operating manual when measuring with the LDS.
Different z-positions of the detected focus
When measuring with a conventional measuring tip, the imaged plane is approx. 2.4 mm lower than when measuring with the FS³. The beam focus is then measured correspondingly higher.
The z-positions determined in different measurements are only directly comparable if the measurements were performed with the same type of measuring tip (conventional or FS³).
In all measuring modes, the Advanced tab contains the Move to focus of selected caustic option. This option can only be used if the selected caustic measurement was performed with the FS³.
Measuring tip selection
After clicking the Connect to device button, the Measuring tip selection dialog opens.
XSelect the mounted measuring tip.

Setting the parameters of the conventional measuring tip
In all measuring modes, the parameters of the conventional measuring tip can be set in the Advanced tab.
1.

Click on the Advanced tab.

2.

In the lower area of the tab, open theMeasuring tip dropdown area.
Enter the properties of the measuring
tip in the input fields.

3.

The information is on the packaging of the measuring tip.

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35,0(6Supplement to the Operating Manual
FocusMonitor FM+ HPDDistance of the pinhole aperture to the reference plane25.8 ±0.3 mm

5Fig. 5.1:

Distance of the pinhole aperture to the reference plane on the traversing carrier

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