METIS M311 / M322 / H311 / H322 (17-pin)
Mechanical Installation
16
If the target is smaller than the spot size, less signal strength arises to the pyrometer. If this falls be-
low 2%, usually a measurement is no longer possible (also see
Switch-off Level
).
Entering a fill factor that indicates how much percent of the measuring field is filled, has no influence
if using the 2-channel measuring mode. In one channel mode measurements can be performed of
measuring objects that are smaller than the spot size. Requirement is a cold background tempera-
ture, otherwise background temperature will be influenced the measurement result.
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.
The focus distance (=measuring distance at the
smallest spot size) is easy to find where the laser
dot is the smallest.
INFO:
The size of the laser point does not match to the spot size, spot sizes are given in the
CAUTION, Laser Radiation, Laser Class 2:
Never look into the direct or reflected laser beam.
Do not point the laser to anyone.
If laser radiation hits the eye, the eye should be averted immediately.
Turn on / off:
Via the targeting light button on rear panel or via software
SensorTools
(see
Control window
).
(The targeting light will automatically switched off after 3 minutes if it is not
switched off manually. Adjustable via software under
tings
Laser targeting light settings
)
INFO:
The laser targeting light is turned off at a device temper-
ature above 65°C (M3 devices) or 60°C (H3 devices)
If the targeting light 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). If the temperature falls below the switch-off val-
ue, the laser will work again.
5.4.2 Alignment with the Through Lens Sighting / View Finder
The view finder provides upright imagery so that the target under
measurement can be viewed visually. A target circle shows the
measuring spot when the target is in focus.
Devices with temperature range above 1400°C are equipped with a
continuously adjustable eye protection filter in the eyepiece to reduce
glare at high measurement temperatures. Rotating the eyepiece will
change the brightness.
INFO:
The size of the target circle does not match to the spot
size, spot sizes are given in the measuring field tables (see
CAUTION, Danger of eye damage at measuring temperatures above 1400°C!
To protect the eyes at high measuring temperatures, first, before alignment, the eyepiece
must be adjusted to the darkest position, a safe method is the adjustment by looking at a
replacement light source, e.g. a lamp.
Laser target-
ing button
Software
Focus point
Spot bigger
View finder