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METIS M308 / M309 / M313 / M316 / M318 / M323 / H309 / H316 / H318 (12-pin)
Mechanical Installation
18
INFO:
The camera module is turned off at a device temperature above 55°C.
If the camera module does not turn on, probably the device's internal temperature is too high. In
this case, the place of installation of the pyrometer should be checked (excessive heat radiated
from the measuring object). When temperature falls below 55°C the camera module is working
again.
5.5
Setting the Measuring / Focus Distance
The focal distance is the distance at which the lens has the smallest spot size. In most cases, this dis-
tance is also the required measuring distance.
For fixed focus optics, the focus distance is set to a fixed distance and can not be changed.
With focusable optics the focus distance can be changed continuously within a predetermined range,
so the smallest possible spot size is always achieved.
5.5.1 Manually Focusable Optics
Release optics turn counterclockwise
Move optics in or out until the measured distance is found (see
Alignment onto the measuring object
or via the optics pull-out in
the spot size tables, section
- Pulled optics: short measuring distance
- Inserted optics: long distance measurement
Lock optics turn clockwise (hand-screwed, without tools).
5.5.2 Motorized Focus Optics
(only M3)
Set the measuring distance with the arrow push buttons
on the de-
vice, the set distance is displayed on the device display for a few seconds,
then will return to the measurement temperature.
With PC connection the distance also can be set via software (see
SensorTools Software
).
5.5.3 Manually Focusable Fiber Optic Lenses
Optics OL25:
Just slightly open the lens locking ring for re-
leasing and locking the optics, as rear optics part rotates with
opening of the locking ring.
Optics OL12:
Optics lock screw (allen screw) for releasing
and locking the optics.
Pull the rear optics part out of the tube to focus according to
the required measuring distance (laser beam is focused and
has the smallest diameter).
NOTE:
Never pull on the flexible part of the light
guide to focus!
5.5.4 Fixed Focus Optics
(only M3)
Fixed focus optics are set to a fixed measuring distance. To measure with
the smallest possible spot size, the pyrometer must be installed in the speci-
fied distance to object. Additionally the built-in laser targeting light or view
finder helps aligning the pyrometer to the target exactly.
Lens locking ring
Rear optics part
Optics lock screw
Resistant part of
the optical fiber
Focus
adjustment
Tube
Flexible part of the
optical fiber
1. Release
2. Adjust
3. Lock
1
2
3