DeltaOHM HD2402, Operating Manual

Page: 43 / 58

HD2402
- 43 -
V1.4
6.4.8 Table m.n.o. 380-3000
Table m.n.o. 380-3000 shows the exposure limits for parameters “ m ”, “ n ”, “ o ”.
The displayed values are:
• E
skin
[W/m
2
] irradiance value (corresponding to the instant value if a single
sample is taken into consideration, and to the mean value if several samples
are taken into consideration).
• H
skin
[J/m
2
] dose value regarding the samples taken into consideration.
• Exposure time limit (t_lim) for “ o ” index necessary for exceeding the threshold,
calculated with the following formula:
t_lim = 35600/E
skin
if the found time is > 10s
otherwise:
t_lim = (20000/ E
skin
)
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• Exposure time limit (t_lim) for indexes “ m ” and “ n ”
Limits “ m ” and “ n ” should be calculated in the 780-3000 spectral interval. Since this
spectral range is not available in the instrument, the same channel of the “ o ” limit is
used; in this case, values will be greater than real values and consequently they will
be in favor of worker safety.
As to exposure times greater than 1000 seconds, the “
n ” limit is calculated:
if E
IR
≤ 100 W/m
2
then the “ n ” limit is not satisfied;
if E
IR
> 100 W/m
2
then the exposure time is calculated in order to return back with-
in “ n ” limit, in particular:
t_lim=(18000/ E
IR
)
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If the Include in Report box is selected, the data in the table will be included in the fi-
nal report.