Vaisala HPP272 User Manual

Table of Contents
1. About This Document................................................................................... 5
1.1 Version Information.......................................................................................... 5
1.2 Related Manuals................................................................................................5
1.3 Documentation Conventions...........................................................................5
1.4 Trademarks........................................................................................................ 6
1.5 Patent Notice.....................................................................................................6
2. Product Overview........................................................................................... 7
2.1 Introduction to HPP272....................................................................................7
2.2 Basic Features and Options.............................................................................8
2.3 Safety..................................................................................................................8
2.4 ESD Protection.................................................................................................. 9
2.5 Measured Parameters.......................................................................................9
2.5.1 Understanding Relative Humidity and Relative Saturation................10
2.6 Probe Filter........................................................................................................11
2.7 Chemical Purge.................................................................................................11
2.8 Environmental Compensation for Pressure..................................................12
2.9 Measurement Filtering Factor........................................................................12
2.10 Connectivity to Vaisala Insight Software......................................................12
2.11 Additional Features with Indigo Transmitters..............................................13
3. H
2
O
2
Measurement....................................................................................... 14
3.1 Operating Principle of H
2
O
2
Measurement.................................................. 14
3.2 Typical Applications........................................................................................ 16
3.3 Condensation Monitoring...............................................................................18
4. Installation.......................................................................................................20
4.1 Wiring...............................................................................................................22
4.2 Power Supply.................................................................................................. 23
4.3 Setting Probe in Analog or Digital Mode.....................................................23
5. Operation......................................................................................................... 25
5.1 Probe Start-Up................................................................................................25
5.2 Behavior at Exposure to H
2
O
2
.......................................................................25
5.3 H
2
O
2
Concentration Reading When Not Exposed to H
2
O
2
.......................25
5.4 Modbus............................................................................................................ 26
5.5 Operation in Analog Mode............................................................................ 26
5.5.1 Analog Output Overrange Behavior.....................................................26
5.5.2 Triggering Purge in Analog Mode......................................................... 27
6. Vaisala Insight Software............................................................................ 28
6.1 Connecting to Insight Software....................................................................28
Table of Contents
1

Vaisala HPP272 Specifications

General

Brand	Vaisala
Model	HPP272
Category	Measuring Instruments
Language	English