Overview; Navigator 550 Sodium Wet-Section - ABB Navigator 500 Series Operating Instructions Manual

Navigator 500
Sodium analyzer

2 Overview

2.1 Navigator 550 sodium wet-section

The Navigator 550 sodium wet-section has been designed for use with an ABB Navigator 540 transmitter to provide continuous
monitoring and control of power station boiler feed water / steam condensate. Sampling points include mixed bed outlets in water
treatment plants, extraction pump discharge, boiler feed, boiler drum and steam.
The wet-section contains a sodium ion responsive electrode and a silver / silver chloride reference electrode housed in an acrylic
flowcell. The electrode pair measures the sodium concentration in the sample. The flowcell houses a temperature sensor for
temperature compensation, sample stream valves and calibration valves.
The measurement range specification is 0.01 ppb to 10,000 ppb. The correct pH value of the sample is achieved by pre-treatment
with an alkaline vapor*. Calibration is achieved by exposing the sensor to calibration solution* with the low and high calibration valves.
A calibration can be initiated manually when required, or automatically with programmable daily frequency ranges, from 1 to 7 days
and 1 to 8 weeks.
*For information about reagent solutions, contact the local ABB representative.
Reagent tube bottle to entrainment T-piece
Reagent bottle
Calibration solution 2 bottle
Quick-disconnect (QD)
couplings to solution bottles
Reagent tube to entrainment T-piece
Remote reference reservoir (optional)
Calibration solution 2 tubing to
Calibration + Regeneration valve
Entrainment 'T' piece
Calibration + Regeneration valve to stream
switching valve assembly
Sodium electrode
Reference electrode
Pt1000 temperature compensator
Stud terminal (ground)
Fig. 2.1 Sodium wet-section main components (multi-stream version without flowmeters shown)
6
Flowcell
Regeneration solution bottle (optional)
Calibration solution 1 bottle
Bottle carrier
Constant-head unit
Navigator 500
Regeneration solution tubing (optional) to
Calibration + Regeneration valve
Calibration solution 1tubing to
Calibration + Regeneration valve
Calibration + Regeneration valve assembly
Sample outlet (drain) tubing
Manifold valve assembly
(multi-stream wet-sections only)
Stream switching valve assembly
Sample stream inlets (front entry)
Sample stream drain tubing
(rear drain outlet)
2 Overview
OI/ASO550–EN Rev. G