12 Notes for optimal measurement results
31
12 Notes for optimal measurement results
The UVpad E achieves optimal measurement results, if the measurement range is well adjusted
to the irradiance and thus to the UV system. This is generally taken out automatically.
The following notes are there to support you with the setting of the UVpad E, so that optimal
measurement results can be achieved.
12.1 The UVpad E displays „MAX“
The UVpad E saves the maximum irradiance during the measurement. Due to the individual
lines in the spectrum, the measurement signal can partly exceed the measurement range. In this
case, the UVpad E displays the message “MAX”.
Select low sensitivity or a fixed integration time. Reduce the lamp power, if this is insufficient.
If the measuring range is over modulated in setting “fixed sensitivity” a hint
will be shown after a measurement. Note that measurement data will not be
stored.
12.2 The UVpad E displays too little irradiance values
Check if the sensitivity has been set correctly. Optimal measurement results are achieved, if
the measurement range is used to at least 50%. After a measurement, the value M should be
higher than 50%.
Select a low or automatic sensitivity or set a short integration time.
When "automatic sensitivity" is set, the spectrum and irradiance will be
stored as the optimal measuring range is automatically found.
In the case of band systems, it may happen that a maximum is recorded prior
to the lamp position and that UVpad E is over modulated below the lamp.
In this case the shown irradiance may be too low. However, the dose is cor-
rectly. In this case a fixed integration time may be helpful.
12.3 The UVpad E displays too high or too low UVC Values
The UVpad E measures the entire UV spectrum range and divides it standardized into UV
spectrum ranges (UVA, UVB, UVC).
For comparison:
Broadband radiometers possibly only measure a part of this range, if these do not operate with
standardized spectral ranges. Thus, high deviations can arise especially in the UVC.
Furthermore, the UV lamps generally emit visible light and IR radiation apart from the UV
radiation. Both can generate scattered light in the UVpad E, which is then detected. It is also
possible that the UVpad E heats up during the measurement and thus the reading noise in-
Summary of Contents for UVpad E
Page 37: ...15 Notes 37 15 Notes ...
