Name: Vaisala HUMICAP HMT330 SERIES
Brand: Vaisala
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USER'S GUIDE

Vaisala HUMICAP® Humidity and

Temperature Transmitter Series

HMT330

M210566EN-J

Default Chapter3
- Table of Contents3
- Vaisala3
- Vaisala9
Chapter 1 General Information13
- About this Manual13
  - Contents of this Manual13
Chapter 213
- Version Information14
- Documentation Conventions14
Chapter 2 Product Overview21
- Introduction to HMT33021
Chapter 3 Installation29
- Mounting the Housing29
Optional Modules51
- Power Supply Module51
  - Installation52
  - Warnings53
- Galvanic Isolation for Output56
- Third Analog Output56
- Relays58
  - Installation and Wiring58
  - Selecting the Activation State of the Relay58
- RS-422/485 Interface59
- LAN Interface64
- WLAN Interface65
- Data Logger Module67
- Table 9 Observation Periods and Resolution67
- Figure 41 Data Logger Module68
- 8-Pin Connector69
- Figure 42 Pinout of the Optional 8-Pin Connector69
- Table 10 Wiring of the Optional 8-Pin Connector69
Chapter 4 Operation71
Getting Started71
Display/Keypad (Optional)71
- Basic Display71
- Graphic History72
- Figure 43 Basic Display72
- Figure 44 Graphical Display72
- Figure 45 Graphical Display with Data Logger73
- Table 11 Periods for Trend and Max/Min Calculations73
- Menus and Navigation74
- Display Alarms77
MI70 Link Program for Data Handling80
Serial Line Communication81
- Figure 51 Service Port Connector and User Port Terminal on Motherboard81
  - User Port Connection82
  - Service Port Connection83
LAN Communication84
- Table 14 Communication Settings for the Service Port84
Chapter 5 Modbus ....................................................................................................139141
- Overview of MODBUS Protocol Support141
- Modbus141
Chapter 6 Maintenance ......................................................................................... 149151
- Periodic Maintenance151
Chapter 7 Calibration and Adjustment157
- Figure 77 Adjustment and Purge Buttons158
Chapter 8 Technical Data167
- Figure 80 Accuracy over Temperature Range168
- Optional Temperature Probe168
- Power Supply Module173
  - Analog Output Module173
  - Table 35 Transmitter Weight (in Kg/Lb)173
- LAN Interface Module174
- Relay Module174
  - RS-485 Module174
- WLAN Interface Module174
- ºC175
Options and Accessories175
- Data Logger Module175
- Figure 82 Transmitter Body Dimensions177
- Figure 83 WLAN Antenna Dimensions178
- Figure 84 HMT331 Fixed Probe Dimensions179
- Figure 85 HMT331 Short Cable Probe Dimensions179
- Figure 86 HMT333 Probe Dimensions180
- Figure 87 HMT334 Probe Dimensions180
- Figure 88 HMT335 Probe Dimensions181
- Figure 89 HMT337 Probe Dimensions181
- Temperature Probe182
- Figure 90 HMT338 Probe Dimensions182
- Figure 91 Optional Temperature Probe Dimensions182
Appendix A Probe Installation Kits and Installation Examples183
- Figure 92 Duct Mounting Installation Kit183
- Figure 93 Duct Mounting Installation Kit for T-Probe184
Duct Installation Kits (for HMT333/337/335)183
Pressure Tight Swagelok Installation Kits (for HMT337)185
- Figure 94 Swagelok Installation Kit for RH-Probe185
- Figure 95 Swagelok Installation Kit for T-Probe185
- RH Probe Installation185
- Temperature Probe Installation185
Examples of Vapor Tight Installations with Cable Gland186
- RH-Probe Installations (for HMT333/337)186
- Figure 96 Cable Installation with Cable Gland186
- Figure 97 Probe Installation with Cable Gland186
- T- Probe Installations (HMT337)187
- Figure 98 Vapor Tight Installation187
- Figure 99 Wall Mounting Installation187
- Example of Climate Chamber Installation188
- Figure 100 Climate Chamber Installation (Not Available from Vaisala)188
- Figure 101 Example of Installation through Roof189
Ball Valve Installation Kit for HMT338190
- Figure 102 Installing the HMT338 Probe through a Ball Valve Assembly190
- Figure 103 Meteorological Installation Kit for Outdoor Installation192
Meteorological Installation Kit (for HMT337)192
- Absolute Humidity 0193
Appendix B193
Calculation Formulas193
- Enthalpy -40194
- Water Vapor Pressure 0195
- Mixing Ratio193
Appendix C Modbus Reference197
Register Map198
- Data Encoding198
- Measurement Data (Read-Only)200
- Table 38 Measurement Data Registers200
- Hpa200
- Configuration Registers201
- Table 39 Status Registers201
- Table 40 Configuration Parameter Registers201
- Table 41 Configuration Flag Registers202
- Table 42 HMT330 Exception Status Outputs202
Diagnostic Sub-Functions203
- Table 43 HMT330 MODBUS Diagnostics203
Device Identification Objects204
- Table 44 HMT330 MODBUS Device Identification204
- Table 45 HMT330 MODBUS Exception Responses204

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Vaisala HUMICAP HMT330 SERIES Specifications

General

Humidity Measurement Range	0 ... 100 %RH
Protection Class	IP65
Measurement Parameters	Relative Humidity, Temperature
Temperature Measurement Range	-40 to +60 °C
Humidity Accuracy	±1 %RH (0 ... 90 %RH) ±1.7 %RH (90 ... 100 %RH)
Temperature Accuracy	±0.2 °C
Humidity Sensor	HUMICAP®
Output Signals	Analog
Power Supply	10...35 VDC
Operating Temperature Range	-40 to +60 °C