Sodium Analyzer Series 2131 Specifications 70-82-03-60 September 2009 Introduction The 2131 is the most advanced online instrument specifically developed for use in continuous measurement and determination of sodium ion concentration. Common application points in a boiler system for online sodium measurement include: make-up water, condensate, boiler feedwater and saturated steam/main steam. The 2131 sodium analyzer operates automatically and comes complete with true fully automatic calibration. Features Wide Analysis Range (0.01 PPB - 10 PPM) True fully automatic single or 2-point calibration Low maintenance : no change of standards for up to two months (one month for reagent) Grab sample capability No change of diffusion tubing Automatic Range Selection Process calibration-calibrate to sample Two 4-20mA isolated current outputs Protection of electrodes from “Hot sample” Automatic temperature compensation Automatically stores last 10 calibrations and alarm logs No use of highly toxic reagents such as monoethylamine or di-isopropylamine 2131 Sensor Unit The sample flows through the heat exchanger, passes through constant head (used to stabilize minor changes in flow rate) and through the three solenoid valves. A vapor entrainment mechanism adds alkaline buffer vapor to the sample before it enters the sodium measuring flow cell and flows to drain. Calibration and grab sample are controlled automatically by the analyzer. Sodium Analyzer Series 2131 Standard/grab sample liquid is brought into system via the three 3-way solenoid valves. A thermistor is housed in the flowcell and is used to detect the temperature of the sample/standard/ grab sample. Sensor flow diagram
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Sodium Analyzer Series 2131 Specifications 70-82-03-60 September 2009
Introduction
The 2131 is the most advanced online instrument
specifically developed for use in continuous measurement
and determination of sodium ion concentration. Common
application points in a boiler system for online sodium
Single or 2-point calibration Manual and fully automatic calibration. Manual initiated by operator, automatic with programmable frequency in days. No manual changes of standards during calibration.
Current Outputs Two isolated 4-20 mA current (analog) outputs.
Digital Outputs Communication interface via RS-232 & RS-485 using MODBUS RTU protocol
Alarms Three voltage-free contacts, alarm points set from transmitter rated at 2A, 250VAC (non-inductive)
Power Wide range of input power supply 90VAC – 250VAC
CE Certification (on request) Meets low voltage and low electromagnetic compatibility directives