Conductometer—concentration meter two channel
for nuclear power plants
The analyzer is a two-channel measurement device and consists of
one or two active primary transducers (PT) and one wall-mounted measuring instrument (MI).
The analyzer is developed on the basis of C-3122 and is designed for use in severe environmental conditions,
namely: seismic instability, high-level radiation, unstable electromagnetic compatibility (EMC)..
For use in the radiation zone, PT sensor may be
removed from the electronic part PT with a special cable (split version).
The sensors design allows to use them for measuring
SEC high-temperature liquids, for example, in evaporators.
The instrument can operate in the mode of measuring SEC difference between two channels.
This is needed for controlling deficit of cooling or heating agents.
Primary transducers can be of single-channel and two-channel design.
PT housing is made of stainless steel and allows for its treating with decontamination fluids.
The analyzer provides a digital display of basic measured
SEC temperature parameters, their converting into proportional values of unified DC output signals, data
exchange via digital interface RS-485, adjustable alarm low/high of measured parameters, as well as archiving and
graphic display of measurement results..
Application: nuclear power and other industries, requiring a super reliable measurement of specific electric
conductivity (SEC) in aqueous solutions of salts, alkalis nd acids.
(0...1), (0...10), (0...100), (0...1000) μS/cm
(0...1), (0...10), (0...100), (0...1000) mS/cm
- for conductometers (SEC)
2,0% (typ. 0,5%)
- for concentration meters
Temperature range of the analyzed liquid:
(+5...+120) ºС 2)
Refarence temperature for termocompensation3):
according to the order
Thermocompensation range relatively the reference temperature:
flowing or submersible
Material of sensor:
SS316, SS321, SS904, titanium ВТ1-00, tantalum
PT electronic unit enclosure material:
SS321 or SS316
< 1,6 МПа (under T < +95°С); < 0,6 МПа (under +95°С < T < +120°С);
Viscosity of the analyzed liquid
max 0,2 Pa*sec
Degree of protection against water and dust
Climatic version in accordance with GOST 15150 (Rus):
Т=(-40..+50) °С; PT is resistant to mold fungi
Category II for NP-031-01 (Rus)
Resistanse to electromagnetic influence
IV by GOST 32137 (Rus), criterion A
Resistance to radiation:
- absorbed dose rate of the sensor
max 1,3·105 Gy
- The electronic block of PT is resistant to the effect of the integral absorbed dose
of ionizing radiation
max 150 Gy
Stability to mechanical influences in accordance with GOST 12997 (Rus)
- electronic unit PT
- sensor with a depth of immersion of 400 mm
Quantity of measuring channels
Parameters being measured in every channel
SEC and temperature
Communication line length from the PT to MI
max 800 m
Measuring range (according to analogue output signal)
- direct current analogue, proportional to the measuring ranges of SEC and temperature
galvanically isolated from the input signal
(0...5), (0...20) mА or (4...20) mА (selected programmatically)
- digital interface
RS-485, ModBus RTU data communications protocol
- discrete, programmable, actuation according to SEC or temperature set points
four relay with switching contacts, ~240V, 3A
from 4.4 hours to 55 days
programmable from 1 sec to 5 min
~(100...240) V, (50...60) Hz
max 15 VA
MI enclosure material:
- panel mounted design
- wall mounted design
Dust and water protection:
- wall mount MI enclosures
- panel mount MI enclosures on the front panel
Resistance to mechanical influences in accordance with GOST R 52931 (Rus)