Quad Single Channel Analyser Type SC 641 is essentially an integration of four individual Single Channel Analysers, a fifth additional channel having only "Integral Mode", with optimisation in electronics. The main objective of this design approach is to have stable four windows with a common reference which otherwise is not possible. Fifth channel is used for counting integral counts and this has only LLD control. Also the electronics is compressed into a 3 bit module. This is designed to serve as an integral part of 4 channel Gamma Ray Spectrometry system, used for counting U, Th & K in a geological sample.
Unit will have for each of the channels, LLD & ULD control settings manually to bracket desired energy. |
Features
- Integrated unit consisting of four independent SCAs in one module
- Each SCA has three modes of INT, NOR & WIN modes of operation
- Fifth SCA is also built-in, but has only LLD control
- Primarily designed to be an integral part of FOUR channel PC based Gammaray Spectrometer system used for Geological prospecting
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| Specifications |
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Input (IN1 to IN5) |
Four [Positive unipolar or bipolar (0–10V) linear range, 0.5-10 micro. Sec pulse width, 12 V max.] |
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Modes |
Integral, Normal and window |
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nput Impedance |
100 K Ohms |
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Outputs |
4 V, 0.5 microsec wide TTL pulse |
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Window or upper level discriminator |
Variable from 0-10V when in NORMAL mode
Variable from 0-1V when in WINDOW mode
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Non-linearity |
Less than 0.3% of full scale (10V) for both the discriminators |
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Window width constancy |
Better than 30mV variation over the linear 0-10V range |
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Maximum Zero offset |
Less than 0.5% of full scale (10V) for both the discriminators |
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Mechanical dimensions |
Three width standard module of 1.35” (W) X 8.75” (H) X 10.9” (D) |
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Module connector |
NIM Standard as per AEC specifications TID 20893 (Rev) Type : AMP 204186-5 or Amphenol Connector Type : 26-159-24P-H (24 Pin Type) |
