Description; Theory Of Operation - Henkel LOCTITE UVALOC 1000 Bedienungsanleitung

2

Description

2.1

Theory of Operation

UVALOC is a high-performance lamp system for curing UV adhesive. The chamber
version (97055) is a closed system. It is used for applications permitting manual loading
of the cure chamber.
The tunnel version (97056) is the open type designed for integration into semi or fully
automated plants. Both versions offer capability for internal monitoring of the intensity of
UV radiation emitted by the bulb. This function provides additional safety in the
production process as lamp performance is monitored for each exposure.
The parabolically shaped reflector is usable for the most applications because the nearly
parallel radiation generates a uniformly illuminated radiation area.
In contrast the elliptical shaped reflector generates a line of radiation with high intensity
and is more suitable for the use in conveyer systems. The basis is here the tunnel
version 97056.
Radiation spectrum and performance provided by the lamp are especially matched to the
®
requirements of Loctite UV curing adhesives and coating materials. Completely dry,
non-tacky surfaces can be achieved rapidly. Exposure times can be preset in 1 s steps to
ensure precise repeatability of curing results. Exposure time must be determined by
testing to ensure precise results.
As with all UV bulbs of this type, the intensity of light will decline with time as the
electrodes deteriorate and burnt tungsten is deposited on the lamp housing.
The UV minimum output –which is necessary to cure and triggers a warning message
when this value is reached – can be set in the "UV MINIMUM" menu as percentage
value.
The condition for it is a calibration of the integrated UV meter with the bulb. The
"UV CALIBRATION" menu indicates the measured value in terms of percent, e.g. 105%.
This is an absolute value showing the intensity of the bulb. Do not calibrate after
replacing the bulb, to guarantee that the output of the new bulb can be compared with
the old one.
During the installation a measurement should take place with a separate UV measuring
instrument. The measuring should be made at the same position where the work piece
will be inserted into the chamber. An exact relation is received between the %-indication
and absolute intensity (in mW/cm²), for example 100% corresponds to 100 mW/cm²
UV intensity on this position.
However, if you should find out during production that the "FELL BELOW UV MINIMUM"
warning message is displayed too early or too late, you can adjust the setting on the "UV
MINIMUM" menu.
For better bulb control, the number of ignitions is recorded for each bulb. When the bulb
is replaced, the count should and the associated bulb operating hours should be reset.
The XS 2 interface (only tunnel version) is used for exchanging the actual system
statuses with a higher-ranking controller, see Section 9.2.
11