MNL-00007 [3] Proprietary and Confidential Page 25 of 63
19.0 Flex Timer Instructions: UV Series, 7 Series, M Series, and 4
Series
19.1 Determining a Treatment Time
When using time as a dose, there are two treatment methods
that can be used. The simplest is to start at a prescribed time
and then increase treatment times by a specific time increment
or by a percentage. Another method is to use the factory
power output levels (shown on the Power Output Certificate)
to determine estimated “time equivalents” needed to deliver
doses in milliJoules (UVB) or Joules (UVA or visible light).
To determine a “time equivalent”, consult the laminated Time
Chart that is provided and find the power output on the top
row (horizontal axis). The numbers in the left most column
(vertical axis) represent a range of potential treatment doses.
Find the dose then trace that row to the right until it intersects with the column corresponding to
the factory power output of the device. The time equivalent is shown where the two lines
intersect. For example, if the factory power output is 4.0 mW/cm2 and the dose to be delivered is
280 mJ, then the appropriate treatment time will be 01:10. See Table 4 Partial UVB Time Chart
Note: For your convenience, and as an alternative to the UVB time chart, the latest version of
our free iPhone and Android application “Phototherapy Math” is available for download at the
iTunes app store and Android market. It quickly calculates treatment times, backup safety times,
and makes the calculation of dose and time increases simple. If using a PC, visit
www.phototherapymath.com for a web based calculator and additional information.
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