Which following is not constant for the calibration factor in Coulter counter?(a) Electrolyte resistivity(b) Amplifier gain setting(c) Given aperture size(d) Setting of the threshold level controlI got this question in an online quiz.My query is from Transmission of Video Images in division Telemedicine Technology of Biomedical Instrumentation

Which following is not constant for the calibration factor in Coulter

1.	Which following is not constant for the calibration factor in Coulter counter?(a) Electrolyte resistivity(b) Amplifier gain setting(c) Given aperture size(d) Setting of the threshold level controlI got this question in an online quiz.My query is from Transmission of Video Images in division Telemedicine Technology of Biomedical Instrumentation
Answer» Right option is (d) Setting of the threshold level control For EXPLANATION: The calibration factor is constant for GIVEN aperture SIZE, electrolyte resistivity and amplifier gain setting. It is USED for the conversion of threshold settings to particle VOLUMES or their cube roots to equivalent spherical diameters.

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