Maintenance; Cleaning; Change Protection Window / Lens At Manual Focusable Optics - KPM PROCESS SENSORS METIS M308 User Manual

METIS M308 / M309 / M313 / M316 / M318 / H309 / H316 / H318 (12-pin)
10

Maintenance

CAUTION|
|
Before beginning any maintenance, switch off power supply or pull connector on the pyrometer to prevent in-
jury by accidentally activated laser targeting light!

10.1 Cleaning

Clean the lens with a soft cloth and a little acetone. Use only high-purity acetone to avoid residues.
Do not
▪ clean the optics with solvents that contain acid
▪ immerse the optics in water or other liquids to clean

10.2 Change Protection window / Lens at Manual Focusable Optics

The lens or the protective window in pyrometers with manually focusable optics can be changed, e.g. for differ-
ent measuring tasks or if it is scratched. The lenses are interchangeable without recalibration.
Preparation / Procedure:
▪ Perform work in a clean and dust-free environ-
ment to prevent the ingress of contaminant and
dirt into the pyrometer.
▪ Hold the pyrometer with the lens upwards so that
the parts do not fall out after loosening the screw
rings. To remove the parts, rotate the pyrometer
with the lens downwards and carefully drop parts
down into the hand.
Protective window change:
▪ To replace the protective window, only the pro-
tective window screw ring (from the protective
window holder) must be removed, then the win-
dow can be removed.
▪ Install the new protective window, observing the
order of the other parts, and tighten the screw
ring of the protective window unit.
Lens change:
▪ The protection window unit can be removed by
unscrewing the outer screw ring (from the pro-
tective window holder).
▪ Now the lens and the other parts shown in the picture can be removed.
▪ Install the new lens according to the order of the other parts, and tighten the screw ring of the protective win-
dow unit (from the protective window holder).
Note the installation direction for plano-convex lenses: 2 different lens designs are used. For plano-
convex lenses, the installation direction is with the curvature in the direction to the measurement object. Bi-
convex lenses are equal on both sides and therefore have no mounting direction.
switch off supply voltage.
Optics adjustment
Lens holder
Optics lens
Spacer
O-ring 21 x 2 mm
Protective
window unit
Biconvex
Plano-convex
Protective window
holder screw ring
O-ring 20 x 1 mm
Protective window
Protective window screw ring
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