Vaisala GMP252 User Manual

Table of Contents
1. About This Document......................................................................................7
1.1 Version Information.............................................................................................7
1.2 Related Manuals...................................................................................................7
1.3 Documentation Conventions............................................................................. 8
1.4 Trademarks...........................................................................................................8
1.5 Patent Notice....................................................................................................... 9
2. Product Overview............................................................................................. 11
2.1 Introduction to GMP252 .................................................................................... 11
2.2 Basic Features and Options.............................................................................. 12
2.2.1 Connectivity to Vaisala Insight Software..................................................12
2.2.2 Additional Features with Indigo Transmitters..........................................13
2.2.3 Filter Options................................................................................................13
2.3 Operating Principle of CO
2
Measurement.......................................................14
2.4 Environmental Compensation..........................................................................15
2.4.1 Temperature Compensation.......................................................................16
2.4.2 Pressure Compensation.............................................................................. 17
2.4.3 Background Gas Compensation................................................................ 17
2.5 Probe Startup..................................................................................................... 17
2.6 Filtering Factor................................................................................................... 17
2.7 Analog Output Overrange Behavior................................................................18
2.7.1 Analog Output Overrange Example..........................................................18
2.8 Safety...................................................................................................................19
2.8.1 ESD Protection............................................................................................20
2.9 Regulatory Compliances..................................................................................20
3. Installation.......................................................................................................... 21
3.1 GMP252 Probe Dimensions...............................................................................21
3.2 Recommended Installation............................................................................... 21
3.3 Installation Accessories..................................................................................... 21
3.3.1 243261SP Mounting Flange....................................................................... 22
3.3.2 243257SP Mounting Clips..........................................................................23
3.3.3 ASM212017SP Spray Shield........................................................................23
3.3.4 DTR250 Radiation Shield...........................................................................24
3.3.5 DTR250A Pole Mounting Kit..................................................................... 24
3.4 Power Supply.....................................................................................................25
3.5 Wiring................................................................................................................. 25
4. Vaisala Industrial Protocol...........................................................................27
4.1 Vaisala Industrial Protocol Overview.............................................................. 27
4.2 Serial Interface Settings................................................................................... 27
4.3 Physical Interface.............................................................................................. 27
4.4 Connecting with a Computer...........................................................................27
4.4.1 Installing the Driver for the USB Service Cable...................................... 29
4.5 Accessing Serial Commands from Modbus or Analog Mode...................... 30
4.6 Enabling Modbus Mode from Vaisala Industrial Protocol............................30
4.7 Changing From Digital Output to Analog Output......................................... 31
4.8 Serial Commands............................................................................................... 31
4.9 Device Information and Status........................................................................33
4.10 Serial Line Output and Communication.........................................................36
Table of Contents
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Vaisala GMP252 Specifications

General

Brand	Vaisala
Model	GMP252
Category	Measuring Instruments
Language	English