Hydrazine Analyzer Series 2171 Specifications 70-82-03-64 November 2009 Introduction The 2171 is the most advanced hydrazine instrument specifically developed for use in continuous measurement and determination of hydrazine concentration in boiler feedwater. Common application points in a boiler system for online hydrazine measurement include: deaerator, condensate system and boiler feedwater. The 2171 hydrazine analyzer operates automatically and comes complete with true fully automatic calibration. Features Wide Analysis Range (0.01 PPB - 10 PPM) The fully automatic 1-point calibration Low maintenance : Autonomous nstrument for up to two months Grab sample capability No change of diffusion tubing Automatic Range Selection Process calibration-calibrate to sample Two 4-20mA isolated current outputs Protection of sensor from “Hot sample” Automatic temperature compensation Automatically stores last 10 calibrations and alarm logs Rechargeable hydrazine cell 2171 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 controller automatically by the analyzer. 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.
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Hydrazine Analyzer Series 2171 Specifications 70-82-03-64 November 2009
Introduction
The 2171 is the most advanced hydrazine instrument
specifically developed for use in continuous measurement
and determination of hydrazine concentration in boiler
feedwater. Common application points in a boiler system for
online hydrazine measurement include: deaerator,
condensate system and boiler feedwater. The 2171
hydrazine analyzer operates automatically and comes
complete with true fully automatic calibration.
Features
Wide Analysis Range (0.01 PPB - 10 PPM)
The fully automatic 1-point calibration Low
maintenance : Autonomous nstrument for up to two
months
Grab sample capability
No change of diffusion tubing
Automatic Range Selection
Process calibration-calibrate to sample
Two 4-20mA isolated current outputs
Protection of sensor from “Hot sample”
Automatic temperature compensation
Automatically stores last 10 calibrations and alarm logs
Rechargeable hydrazine cell
2171 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
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