METIS M308 / M309 / M313 / M316 / M318 / M323 / H309 / H316 / H318 (12-pin)
Mechanical Installation
16
INFO to avoid overheating of the laser targeting light or camera module:
The laser targeting light is deactivated at an internal device temperature above 65°C (M3 de-
vices) or above 60°C (H3 devices).
The camera module is deactivated at an internal device temperature above 55°C.
Below that temperatures the sighting can be used again.
Operation outside this temperature leads to incorrect measurements and may damage the device.
To comply with the permitted ambient temperature sufficient distance from the (hot) measuring object is
to observe.
The internal housing temperature can be read out via the soft-
ware
SensorTools
).
It is possible to configure one of the switching outputs so that a
corresponding signal is switched when the maximum tempera-
ture is exceeded (see
and under
Accessory:
With radiant heat from the front, the pyrometer can be protected by a cooling plate. The
use of the pyrometer in ambient temperatures outside the permissible pyrometer’s ambient temperature
is possible with an additional cooling housing.
5.4
Alignment onto the Measuring Object
To detect the temperature correctly, the pyrometer
must be aligned properly to the measuring object. In
the focus point of the optics (focused distance) the
spot size diameter is the smallest. Also measurements
in the defocused area can be done to determine the
average temperature of a bigger spot. If the target un-
der measurement is smaller than the spot size pro-
duced by the lens, the colder or warmer border is also
measured and results in a lower or higher temperature
To get a correct measurement result, the following requirements must be observed:
The optical path between pyrometer and the target must be free of interfering objects and vapors,
fumes or dust (if necessary, use air purge or sight tube, see
Accessories
).
A viewing window between pyrometer and the measured object must have constant transmission
properties in the spectral range of the pyrometer (e.g. quartz glass or BK7 crown glass).
The distance to the measured object must be in the range of focusable measurement distance of the
optics, if a precise measurement is to be made.
If the target is smaller than the spot size, there will be
measuring errors because background temperatures
go with the measurement.
If the target is smaller than the spot size, there will be
measuring errors because background temperatures
influence the measurement. If the target is smaller
than the spot size and the background temperature is
cold, a fill factor can be entered that specifies what
percentage is filled in the measuring field (input see
Configure
the
Pyrometer
and
).
5.4.1 Alignment with the Laser Targeting Light
The laser targeting light is a conical red laser beam
with the largest diameter directly at the lens and the
smallest and sharpest in the focused distance, i.e. at
the point where the measuring field is the smallest
(= Measuring distance in the spot size tables).
Focus point
Spot size and
laser point bigger
DT: internal de-
vice temperature
via software
Spot size smaller than meas-
ured object, measurement OK
Measuring object
Spot size larger than measured
object, enter fill factor, observe
background radiation!
Focus point
Spot size bigger