Vaisala hmt120 User Manual

Table of Contents
1. About This Document................................................................................... 7
1.1 Version Information.......................................................................................... 7
1.2 Related Manuals................................................................................................ 7
1.3 Documentation Conventions...........................................................................7
1.4 Trademarks........................................................................................................ 8
1.5 Patent Notice.....................................................................................................8
2. Product Overview........................................................................................... 9
2.1 Introduction to HMT120....................................................................................9
2.2 Accessories........................................................................................................9
2.3 Fixed and Remote Probe Models....................................................................9
2.4 Optional Display..............................................................................................10
2.5 Interchangeable Probe................................................................................... 10
2.6 Constant Output Probe.................................................................................. 10
2.7 Transmitter Parts.............................................................................................. 11
2.8 Safety................................................................................................................ 12
2.8.1 ESD Protection..........................................................................................12
2.9 Regulatory Compliances.................................................................................12
3. Installation........................................................................................................ 13
3.1 Opening the Transmitter Cover..................................................................... 13
3.2 Wall Mounting..................................................................................................14
3.3 Installation with Rain Shield...........................................................................15
3.4 Installation with Radiation Shield..................................................................16
3.5 Duct Installation Kit.........................................................................................17
3.5.1 Probe Assembly with Duct Installation Kit........................................... 18
3.5.2 Drilling Instructions for Duct Installation Kit.........................................19
3.6 Probe Mounting Clamp...................................................................................19
3.7 Probe Mounting Flange.................................................................................20
3.8 Connections......................................................................................................21
3.8.1 Wiring....................................................................................................... 22
4. Serial Line Operation.................................................................................. 23
4.1 Using the Service Port................................................................................... 23
4.2 Serial Interface Settings.................................................................................23
4.3 Installing the Driver for the USB Service Cable.......................................... 23
4.4 Connecting with a Computer........................................................................24
4.5 List of Serial Commands................................................................................26
4.6 Device Information and Status......................................................................27
4.7 Serial Line Output and Communication...................................................... 32
4.8 Calibration Commands.................................................................................. 34
4.9
Configuring Serial Line Operation................................................................37
4.10 Measurement Parameter Configuration Commands................................. 39
4.11 Analog Output Configuration Commands..................................................40
4.12 Other Commands........................................................................................... 42
Table of Contents
1

Vaisala hmt120 Specifications

General

Brand	Vaisala
Model	hmt120
Category	Transmitter
Language	English