ANALOG RADIACHROMIC READER
MODEL FWT-91R (THIS
READER HAS BEEN DISCONTINUED - ONLY SERVICING OF UNITS MAY STILL
The model FWT-91R reader is a dual wavelength photometer for readout
of the FWT Radiachromic dosimeters. The meter reads directly in
Optical Density (OD) or percent transmission. The two wavelengths
available are 510 nm and 600 nm and are used to cover the range
of the Radiachromic Dosimeters.
The instrument is simple to use. The front panel controls are used
to setup the instrument for operation. The wavelength is selected
from the front panel switch and the dosimeter is placed in the holder
and lowered into the well. The x10 switch increases the sensitivity
for reading high OD dosimeters.
The instrument uses bandpass filters, which have excellent long
term stability, for wavelength selection. The lamp has a long life
and is easily replaced.
to 1.00 OD 1.00 to 2.00 OD using the X10 switch 0-100% transmission
Controls: Power On/off, Wavelength selection, X 10 button, 0%T and
Selections: 510 or 600 nm.
Scale: 4" Meter W/ 0-2 OD log scale, 0-100%T
Warm Up Time:
0.02 OD/hr near 0 OD
Precision: ± 3% transmission full scale
± 2 nm
nm: 7.7 nm ± 1.5 nm; 600 nm: 10.1nm ± 1.5 nm
110 VAC 60HZ
W x18 D x 18 H cm (10 x 7 x 7 in)
Filter Set: FWT-82S (standard); FWT-82C (Certified)
Operation (Model FWT-91R-220)
the factory for other changes or modifications.