ANALOG RADIACHROMIC READER
MODEL FWT-91R (THIS
READER HAS BEEN DISCONTINUED - ONLY SERVICING OF UNITS MAY STILL
BE AVAILABLE)
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.
Specifications Range:0.01
to 1.00 OD 1.00 to 2.00 OD using the X10 switch 0-100% transmission External
Controls: Power On/off, Wavelength selection, X 10 button, 0%T and
100%T adjustments. Wavelength
Selections: 510 or 600 nm. Meter and
Scale: 4" Meter W/ 0-2 OD log scale, 0-100%T Warm Up Time:
10 minutes Drift: ±
0.02 OD/hr near 0 OD Photometric
Precision: ± 3% transmission full scale Filter Wavelength:
± 2 nm Filter Bandwidth:510
nm: 7.7 nm ± 1.5 nm; 600 nm: 10.1nm ± 1.5 nm Lamp life:
8,000 hours Power Requirements:
110 VAC 60HZ Size: 25
W x18 D x 18 H cm (10 x 7 x 7 in)
Options Neutral Density
Filter Set: FWT-82S (standard); FWT-82C (Certified) 220V 50Hz
Operation (Model FWT-91R-220) Alternate
wavelengths available. Please consult
the factory for other changes or modifications.
Range:0.01
to 1.00 OD 1.00 to 2.00 OD using the X10 switch 0-100% transmission