KBF P + KBF LQC + KBWF (E6) 11/2016 page 50/189
7. Function of light measurement, and integration: Light Quantum
Control – KBF LQC
The chamber is equipped with fluorescent tubes for UVA and the visible spectral range. These fluorescent
tubes can be turned on with the operation lines “Light VIS” and “Light UVA”.
When operation line “LQC On” is activated, the fluorescent tubes can also be turned on in fixed value or
program operation mode by entering a dose target value, which is higher than a dose value already
reached. As long as the operation lines “Light VIS” and “Light UVA” are not activated, the fluorescent
tubes automatically turn off when the respective dose target value is reached. Operation lines “Light VIS”
and “Light UVA” permit turning on the fluorescent tubes independent from automatic turn-off (or to prevent
automatically turning-off) and thus to attain dose target values which are higher than the entered maxi-
mum dose. This permits turning on and off the UVA and the VIS tubes independently.
The intensities of illumination [LUX] and UVA [W/m
2
] are measured by optical sensors in the inner cham-
ber (instantaneous value display) and are integrated temporally (dose value display), i.e. the doses of
illumination [MLUXh] and UVA [Wh/m
2
] increase every minute by the respective actual value. In the chart
recorder display the instantaneous values are shown under “Instantaneous values” and the integrated light
values under “Dose values”. The instantaneous value display serves to help the user find a representative
measuring spot after charging and to control the correct function of the illumination equipment.
In fixed value or program operation mode, you can numerically enter target dose values for UVA and visi-
ble light.
• When the VIS target dose is reached the corresponding line in Normal Display is highlighted in green,
and the message VIS dose reached is displayed in the event list.
• When the UVA target dose is reached the corresponding line in Normal Display is highlighted in
green, and the message UVA dose reached is displayed in the event list.
• As soon as the second target dose is reached as well, in addition the alarm message VIS and UVA
doses reached is displayed, and a buzzer sounds. The alarm can be acknowledged on the controller.
The alarm message is displayed in the event list.
• If the operation lines “Light VIS” and “Light UVA” are not activated, the according fluorescent tubes
turn off to avoid exceeding the selected dose. If the operation lines “Light VIS” and “Light UVA” are ac-
tivated, exposure to illumination and integration continue even after the message until the operation
lines will be deactivated.
7.1 Display of the instantaneous and the integrated values
The instantaneous values and the dose values of VIS and UVA are constantly measured. The dose values
(set-point and actual values) are always shown in Normal Display independent on the controller operation
mode. Additionally in the chart recorder display the instantaneous values (actual values) are shown under
“Instantaneous values” and the integrated light values (set-point and actual values) under “Dose values”,
see chap. 17.
7.2 Measurement of illumination intensity and temporal integration
Operation line “LQC on” serves to start and stop the integrative function and to reset the integrated values
of UVA and VIS. Operation lines “LQC reset VIS” and “LQC reset UVA” serve to reset to zero the integrat-
ed values once in a time.
• Integrative function: Operation line “LQC On” not activated
The LQC symbol in the screen header indicates that the integrative function has been activated via op-
eration line “LQC On”.
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