EG&G ORTEC 474 Manual de funcionamiento y servicio - Página 11

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PUT Aperture Control
Puiser Aperture Control
' 9351 FLUORESCENCE
ORTEC
RCA
9201
8850
PHOTOMULTIPLIER
BASE 8. TUBE
1
456
HIGH-VOLTAGE
POWER SUPPLY
Stop Channel
Linear Channel
474
TIMING
FILTER
AMPLIFIER
SAMPLE COMPARTMENTI
CUVETTE
ABC
C
8 -
A
9290
HIGH-VOLTAGE
POWER SUPPLY
Start Channel
A - Aperture
B - Filter
C - Polarizer
9352
Nanosecond
Light Puiser
473A
CONSTANT-
FRACTION
DISCRIMINATOR
(Used as Ratio Indicator)
DUAL
COUNTER/TIMER
Start
From 473A,
4890, or 457
Data Accumulation Channel
473A
CONSTANT-
425A*
FRACTION
NAraUSECUNO
DISCRIMINATOR
DELAY
Stop
4890
PREAMPLIFIER/
AMP/SCA
457
BIASED TIME-
TO-PULSE-
HEIGHT
CONVERTER
i i Ext. Strobe
DC
6240B
MULTICHANNEL
ANALYZER
"When using the 50-ns time range of the
457, the425A should be used in the
start channel rather than in the stop
channel.
8169a
Rg. 7.2. Nanosecond Decay Time Fluorescence Spectrometer System.
.
r = 19.2n!
lOr
Fig. 7.3. Lifetime Spectrum of Quinine Suifate in Sulfuric Acid.