Human Humalyzer 2000 - Filter Label

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Rev. B 29
Filter Label
The filter label located on the photometer cover describes the specific filter wheel configuration for
your particular instrument. Refer to Figure 12.
Filter wheel position (POS) is the physical placement of the filter on the wheel. The filter wheel
position numbers are shown in the drawing.
Each filter position may have several filter elements installed. Filter configuration (WAVELENGTH
column) describes the various screens and filters in that position . Each element is separated by a
slash (/). The first 3 digit value in this column is always the wavelength of the interference filter, in
nanometers. The other values indicate either dot screens, neutral density filters, or transmittance
filters. A "D" indicates a dot screen and the first two digits are the percent wansmittance. For ex-
ample ,"90D" indicates a 90% dot screen. A 3 digit value (other than the first value in the line)
indicates a transmittance filter. The first digit is the quantity; the last two digits are the percent
transmittance. For example, "115" indicates (1) 15% transmittance filter. A 2 digit value separated
by a decimal point indicates a neutral density filter. The value is the absolute absorbance of the
filter. "BLOCKED" indicates an opaque disk is installed in that position.
Manufacturer lot number (LOT) is the interference filter manufacturers' production code. The
percent transmittance of the interference filter is also specified in this column.
The production date (DATE) is the date the filter wheel was assembled.