Thermo Scientific DensityPRO NAI Series, Руководство пользователя

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Thermo Scientific DensityPRO User Manual 1
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1
Chapter 1
Product Overview
Introduction
Note: This manual provides user instructions for the DensityPRO,
DensityPRO-T, DensityPRO NAI and DensityPRO NAI+ gauges. For the
purposes of this manual, DensityPRO will refer to the complete family of
gauges, unless otherwise specified.
The Thermo Scientific DensityPRO family of gauges has been designed to provide
reliable, accurate process material density measurements for a wide variety of
challenging applications. The instrument is mounted outside of the process vessel and
never contacts the process material. It can also measure the density of almost any
liquid, slurry (solid material in a carrier fluid), emulsion (two different fluids), or
solution (a solute material dissolved in a solvent fluid).
After the gauge calculates the process material density, it can convert the measurement
into a number of forms. For slurries, the gauge can provide measurements based on the
ratio of solid to carrier. Similar measurements can be made for emulsions and
solutions.
By inputting flow data, the gauge can generate mass flow measurements. It can also
accept a 4–20 mA current output from a magnetic flow sensor. For applications that
require temperature compensation, the gauge accepts a temperature input to
compensate the density measurement for changes in process temperature.
The gauge consists of the source head, which contains the radioisotope source, and the
detector-transmitter, which contains the scintillator detector and electronics. The
radioisotope source emits gamma radiation that passes through the process material.
The detector measures the energy of the radiation arriving at the detector after passing
through the process material (and vessel walls). The gauge determines the density of
the process material by measuring the amount of radiation arriving at the detector,
which varies with the density of the process material.
Figure 1-1 . DensityPRO Measurement System