Vaisala PTU300 User Manual

USER'S GUIDE

Vaisala Combine d Pr ess ur e, Hu mi dit y,

and Temperature Tr an smi tt er

PTU300

M210796EN-G

PUBLISHED BY
Vaisala Oyj Phone (int.): [phone]

P.O. Box 26 Fax: [phone]
FI-00421 Helsinki
Finland

Visit our Internet pages at www.vaisala.com.

© Vaisala 2013
No part of this manual may be reproduced, published or publicly displayed in any form

or by any means, electronic or mechanical (including photocopying), nor may its
contents be modified, translated, adapted, sold or disclosed to a third party without prior
written permission of the copyright holder. Translated manuals and translated portions
of multilingual documents are based on the original English versions. In ambiguous
cases, the English versions are applicable, not the translations.

The contents of this manual are subject to change without prior notice.
This manual does not create any legally binding obligations for Vaisala towards

customers or end users. All legally binding obligations and agreements are included
exclusively in the applicable supply contract or the General Conditions of Sale and
General Conditions of Service of Vaisala.

_________________________________________________________________________________

Table of Contents

CHAPTER 1

GENERAL INFORMATION .......................................................................... 13

About This Manual ................................................................. 13

Contents of This Manual ..................................................... 13

Version Information ............................................................. 14

Related Manuals ................................................................. 14

Documentation Conventions ............................................... 14

Safety ....................................................................................... 15

ESD Protection ....................................................................... 15

Recycling ................................................................................ 16

Regulatory Compliances ....................................................... 16

EU Declaration of Conformity .............................................. 16

DNV Type Approval ............................................................ 17

Transmitters with LAN or WLAN Interface .......................... 17

Transmitters with WLAN Interface ...................................... 18

Patent Notice .......................................................................... 18

Trademarks ............................................................................. 18

Software License .................................................................... 19

Warranty .................................................................................. 19

CHAPTER 2

PRODUCT OVERVIEW ................................................................................ 21

Introduction to PTU300 .......................................................... 21

Basic Features and Options ................................................ 23

New and Improved Features Compared to PTU200 ..... 23

Structure of the Transmitter ................................................ 24

Probe Options ..................................................................... 26

Warmed Probe PTU307 ...................................................... 28

CHAPTER 3

INSTALLATION ............................................................................................ 29

Mounting the Housing ........................................................... 29

Standard Mounting without Moun tin g Pla te ........................ 29

Wall Mounting with Wall Mounting Kit ................................. 30

Mounting with DIN Rail Installation Ki t ................................ 32

Pole Installation with Installation Kit for Pole or Pipeline .... 32

Mounting Rain Shield with Installation Kit ........................... 34

Panel Mounting Frame ........................................................ 35

Wiring ...................................................................................... 37

Cable Bushings ................................................................... 37

Grounding the Cables ......................................................... 38

Grounding the Transmitter Housing .................................... 39

Alternate Wiring Systems ...................................................... 39

VAISALA _________________________________________________________________________ 1

User's Guide _______________________________________________________________________

Signal and Power Supply W iring ......................................... 40

8-Pin Connector ................................................................... 41

D-9 Connector ..................................................................... 42

Connections to a 24 VAC Power Supply ............................. 43

Probe Mounting ...................................................................... 44

General Instructions for Probes with Cable ......................... 44

PTU303 for General Use ..................................................... 46

PTU307 for High Humidities ................................................ 47

Temperature Probe (Optional) ............................................ 47

Optional Modules.................................................................... 48

Power Supply Module.......................................................... 48

Installation ...................................................................... 49

Warnings ........................................................................ 50

Galvanic Isolation of the Power Supply ............................... 53

Third Analog Output ............................................................ 53

Installation and Wiring .................................................... 54

Relays .................................................................................. 55

Installation and Wiring .................................................... 55

Selecting the Activation State of the Relay .................... 55

RS-422/485 Interface .......................................................... 57

Installation and Wiring .................................................... 58

LAN Interface ....................................................................... 61

WLAN Interface ................................................................... 62

Attaching the WLAN Antenna......................................... 63

Data Logger Module ............................................................ 63

CHAPTER 4

OPERATION ................................................................................................. 65

Getting Started ........................................................................ 65

Display/Keypad (Optional) ..................................................... 66

Basic Display ....................................................................... 66

Pressure 3h Trend and Tendency Reading ........................ 67

Using Basic Display ........................................................ 67

Pressure tendency graphics and codes ......................... 67

Using Serial Line ............................................................ 69

Missing Trend ................................................................. 69

Graphic History .................................................................... 70

Information Display .............................................................. 72

Menus and Navigation ......................................................... 73

Changing the Language ................................................. 73

Rounding Setting ............................................................ 74

Display Backlight Setting ................................................ 74

Display Contrast Setting ................................................. 74

Using Display/Keypad ............................................... 74

Using Serial Line ....................................................... 75

Keypad Lock (Keyguard) ................................................ 75

Menu PIN Lock ............................................................... 75

Factory Settings ............................................................. 76

Configuring Display Alarms ................................................. 76

Using Display/Keypad .................................................... 77

Using Serial Line ............................................................ 79

MI70 Link Program for Data Handling .................................. 80

Serial Line Communication ................................................... 81

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User Port Connection .......................................................... 81

User Port Operating Modes ........................................... 82

Service Port Connection ..................................................... 82

Connection Cables ......................................................... 82

Installing the Driver for the USB Cable .......................... 83

Using the Service Port ................................................... 83

LAN Communication .............................................................. 84

IP Configuration .................................................................. 84

Using Display/Keypad .................................................... 85

Using Serial Line ............................................................ 86

Wireless LAN Configuration ................................................ 87

Using Display/Keypad .................................................... 88

Using Serial Line ............................................................ 89

Communication Protoco l ..................................................... 90

Web Configuration for LAN and WLAN ............................... 90

Terminal Program Settings ................................................. 91

Opening a Serial/USB connection ................................. 91

Opening a Telnet Session (LAN/WLAN) ........................ 92

List of Serial Commands ..................................................... 94

Getting Measurement Message from Serial Line ................ 97

Starting Continuous Outputting ...................................... 97

R ................................................................................ 97

Stopping Continuous Outputting .................................... 97

S ................................................................................ 97

Outputting Reading Once .............................................. 97

SEND ........................................................................ 97

Assign an Alias for the SEND Command ...................... 98

Outputting Reading Once From All Transmitters ........... 98

Communicating with a Transmitter in POLL Mode ............. 99

OPEN ............................................................................. 99

CLOSE ........................................................................... 99

Formatting Serial Line Mess age ....................................... 100

FTIME and FDATE....................................................... 100

General Settings ................................................................... 101

Changing Quantities and Units ......................................... 101

Using Display/Keypad .................................................. 101

Using Serial Line .......................................................... 101

FORM...................................................................... 101

UNIT ........................................................................ 104

Limit RH Output Range ..................................................... 105

Date and Time ................................................................... 106

Using Display/Keypad .................................................. 106

Using Serial Line .......................................................... 106

NMEA Data Format ........................................................... 107

GPS Commands ............................................................... 108

Pressure Compensation Settings ....................................... 109

Using Display/Keypad ....................................................... 109

Using Serial Line ............................................................... 110

PRES and XPRES ....................................................... 110

PFIX ............................................................................. 110

PSTAB ......................................................................... 111

Data Filtering for Pressure ................................................ 112

Data Filtering for Humidity and Temperature .................... 113

Using Display/Keypad .................................................. 113

VAISALA _________________________________________________________________________ 3

User's Guide _______________________________________________________________________

Using Serial Line .......................................................... 114

Device Information ............................................................. 115

Using Serial Line .......................................................... 115

? .................................................................................... 115

LIGHT ........................................................................... 116

HELP ............................................................................ 117

ERRS ............................................................................ 117

MODS ........................................................................... 117

VERS ............................................................................ 118

Resetting Transmitter using Serial Line ............................ 118

RESET .......................................................................... 118

Locking Menu/Keypad using Serial Line ........................... 118

LOCK ............................................................................ 118

Serial Output Settings .......................................................... 119

Using Display/Keypad ....................................................... 119

Using Serial Line ............................................................... 120

SERI ............................................................................. 120

SMODE ........................................................................ 121

ADDR ........................................................................... 121

INTV ............................................................................. 122

SDELAY ....................................................................... 122

ECHO ........................................................................... 122

Data Recording ..................................................................... 123

Selecting Data Recording Quantities ................................ 123

DSEL ............................................................................ 123

View Recorded Data .......................................................... 123

DIR ............................................................................... 124

PLAY ............................................................................ 125

Deleting the Recorded Files .............................................. 126

UNDELETE .................................................................. 126

Analog Output Settings ....................................................... 127

Changing Output Mode and Range ................................... 127

Analog Output Quantities .................................................. 128

AMODE/ASEL .............................................................. 129

Analog Output Tests .......................................................... 130

ITEST ........................................................................... 130

Analog Output Fault Ind icat ion Set tin g .............................. 131

AERR ............................................................................ 131

Extend Analog Output Range ............................................ 132

Operation of Relays .............................................................. 132

Quantity for Relay Output .................................................. 132

Measurement-Based Relay Output Modes ....................... 132

Relay Setpoints ............................................................ 132

Hysteresis ..................................................................... 134

Relay Indicating Transmitter Error Status ......................... 134

Enabling/Disabling Re lays ................................................. 137

Setting Relay Outputs........................................................ 137

RSEL ............................................................................ 138

Testing Operation Of Relays ............................................. 140

RTEST .......................................................................... 140

Sensor Functions ................................................................. 141

Chemical Purge (Optional) ................................................ 141

Automatic Chemical Purge (Interval Purge) ................. 142

Manual Chemical Purge ............................................... 142

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Chemical Purge in Power Up ....................................... 142

Starting and Configuring Chemical Purge ......................... 142

Using Buttons On Motherboard ................................... 142

Using Display/Keypad (Optional) ................................. 143

Using Serial Line .......................................................... 143

PURGE ................................................................... 143

PUR......................................................................... 144

RGLIMIT ................................................................. 145

Setting Sensor Heating ..................................................... 145

Setting Humidity Sensor Heating using Display/Keypad

..................................................................................... 146

Using Serial Line .......................................................... 146

XHEAT .................................................................... 146

CHAPTER 5

MODBUS .................................................................................................... 147

Overview of Modbus Protocol Support .............................. 147

Taking Modbus into Use ................................................... 148

Enabling Serial Modbus....................................................... 149

Using Display/Keypad (Optional) ...................................... 149

Using Serial Line ............................................................... 149

Enabling Ethernet Modbus .................................................. 150

Using Display/Keypad (Optional) ...................................... 150

Using Serial Line ............................................................... 152

Diagnostic Modbus Counters ............................................. 153

Viewing Counters using Display/Keypad .......................... 153

Viewing Counters using Service Port ................................ 153

Disabling Modbus ................................................................ 154

CHAPTER 6

MAINTENANCE ......................................................................................... 155

Periodic Maintenance .......................................................... 155

Cleaning ............................................................................ 155

Changing the Probe Filter ................................................. 155

Changing the Sensor ........................................................... 156

Error States ....................................................................... 157

Technical Support ................................................................ 159

Product Returns ................................................................... 159

CHAPTER 7

CALIBRATI O N AND AD JUSTMENT ......................................................... 161

Pressure ................................................................................ 161

Opening and Closing the Adjustment Mode ..................... 162

Pressure Adjustment ........................................................... 163

One-Point Adjustment Using Display/Keypad ................... 163

One-Point Adjustment using Serial Line ........................... 164

LCI........................................................................... 164

LC............................................................................ 164

MPCI ....................................................................... 165

MPC ........................................................................ 166

VAISALA _________________________________________________________________________ 5

User's Guide _______________________________________________________________________

Relative Humidity Adjustment ............................................. 167

Using Push Buttons ........................................................... 167

Using Display/Keypad ....................................................... 168

Using Serial Line ............................................................... 169

Multipoint Relative Humidity Adjustment Using Serial Line

........................................................................................... 171

MPC RH Command Syntax .......................................... 171

Example Multipoint Adjustment Procedure .................. 172

Relative Humidity Adjustment After Se n sor Change........ 174

Using Display/Keypad ....................................................... 174

Using Serial Line ............................................................... 174

FCRH ............................................................................ 174

Temperature Adjustment ..................................................... 175

Using Display/Keypad ....................................................... 175

Using Serial Line ............................................................... 176

Analog Output Adjustment (Ch1 and Ch2) ........................ 177

Using Display/Keypad ....................................................... 177

Using Serial Line ............................................................... 177

ACAL ............................................................................ 177

Feeding Adjustment Information ........................................ 178

Using Display/Keypad ....................................................... 178

Using Serial Line ............................................................... 178

CTEXT .......................................................................... 178

CDATE ......................................................................... 178

CHAPTER 8

TECHNICAL DATA .................................................................................... 179

Specifications ....................................................................... 179

Performance ...................................................................... 179

Barometric Pressure ..................................................... 179

Relative Humidity ......................................................... 180

Temperature (+ Operating Pressure Ranges) ............. 181

Optional Temperature Probe ........................................ 181

Calculated Variables .................................................... 182

Accuracies of Calculated Variables ................................... 182

Accuracy of Dewpoint Temperature °C ........................ 182

Accuracy of Mixing Ratio g/kg (Ambient Pressure

1013 mbar) ................................................................... 183

Accuracy of Wet Bulb Temperature °C ........................ 183

Accuracy of Absolute Humidity g/m³ ............................ 183

Dewpoint Temperature (PTU307 Warmed Probe Option) 184

Operating Conditions .................................................... 184

Inputs and Outputs ....................................................... 185

Mechanics .................................................................... 186

Technical Specifications of Optional Modules ................... 187

Power Supply Module .................................................. 187

Analog Output Module .................................................. 187

Relay Module ............................................................... 187

RS-485 Module ............................................................ 188

LAN Interface Module ................................................... 188

WLAN Interface Module ............................................... 188

Data Logger Module ..................................................... 188

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Spare Parts and Accessories .............................................. 189

Dimensions (mm/inch) ......................................................... 191

PTU301 ............................................................................. 192

PTU303 ............................................................................. 194

PTU307 ............................................................................. 194

Temperature Probe ........................................................... 194

APPENDIX A

PROBE INSTALLATION KITS AND INSTALLATION EXAMPLES ......... 195

Duct installation kits (for PTU303/307) ............................... 195

Duct Installation Kit for Temperature Probe (for PTU307)196

Pressure Tight Swagelok Install ation Kits (For PTU307) . 196

RH Probe Installation ........................................................ 196

Temperature Probe Installation ......................................... 198

Examples of Vapor Tight Installations with Cable Gland . 199

RH-Probe Installations (for PTU303/307) ......................... 199

T- Probe Installations (PTU307)........................................ 201

Meteorological Installa tion Kit (for PTU307)...................... 202

APPENDIX B

CALCULATION FORMULAS .................................................................... 203

APPENDIX C

MODBUS REFERENCE ............................................................................. 207

Function Codes .................................................................... 207

Register Map ......................................................................... 208

Data Encoding ................................................................... 208

32-Bit Floating Point Format ........................................ 208

16-Bit Integer Format ................................................... 209

Measurement Data (Read-Only) ....................................... 210

Status Registers (Read-Only) ........................................... 211

Configuration Registers ..................................................... 211

Exception Status Outputs ................................................... 212

Diagnostic Sub-Functions ................................................... 213

Device Identification Objects .............................................. 214

Exception Responses .......................................................... 214

VAISALA _________________________________________________________________________ 7

User's Guide _______________________________________________________________________

List of Figures

Figure 1 Transmitter Body ...................................................................... 24

Figure 2 Inside the Transmitter ............................................................... 25

Figure 3 PTU301 Fixed Probe ................................................................ 26

Figure 4 PTU301 Short Cable Probe ...................................................... 26

Figure 5 Probe Options ........................................................................... 27

Figure 6 Standard Mounting ................................................................... 29

Figure 7 Mounting with Wall Mounting Kit .............................................. 30

Figure 8 Dimensions of the Plastic Mounting Plate (mm/inch) ............... 30

Figure 9 Dimensions of the Probe Holder Plate (mm/inch) .................... 31

Figure 10 Mounting with DIN Rail Installation Ki t ..................................... 32

Figure 11 Vertical Pole .............................................................................. 32

Figure 12 Horizontal Pole ......................................................................... 33

Figure 13 Mounting with Metal Wall Mounting Plate ................................ 33

Figure 14 Dimensions of Metal Mounting Plate (mm/inch) ....................... 34

Figure 15 Mounting Rain Shield with Installation Kit ................................ 34

Figure 16 Panel Mounting Frame ............................................................. 35

Figure 17 Panel Mounting Dimensions (mm/inch) .................................... 36

Figure 18 Cable Bushings......................................................................... 37

Figure 19 Grounding the Screen of Electrical Cable ................................ 38

Figure 20 Screw Terminal Block on Motherboard .................................... 40

Figure 21 Pinout of the Optional 8-Pin Connector .................................... 41

Figure 22 Wiring of Optional D-9 Connector............................................. 42

Figure 23 Connections to 24 VAC Power Supply ..................................... 43

Figure 24 Measurement Error at 100 %RH .............................................. 44

Figure 25 Horizontal Mounting of Probe ................................................... 45

Figure 26 Vertical Mounting of Probe ....................................................... 45

Figure 27 Power Supply Module ............................................................... 48

Figure 28 Galvanic Isolation Module ........................................................ 53

Figure 29 Third Analog Output ................................................................. 53

Figure 30 Third Analog Output Selection .................................................. 54

Figure 31 Relay Module ............................................................................ 56

Figure 32 RS-485 Module ......................................................................... 57

Figure 33 4-Wire RS-485 Bus ................................................................... 59

Figure 34 2-Wire RS-485 Bus ................................................................... 60

Figure 35 LAN Interface Module ............................................................... 61

Figure 36 WLAN Interface Module ........................................................... 62

Figure 37 Data Logger Module ................................................................. 64

Figure 38 Basic Display ............................................................................ 66

Figure 39 Basic Display with P

Figure 40 Pressure Tendency Description ............................................... 68

Figure 41 Graphical Display...................................................................... 70

Figure 42 Graphical Display with Data Logger ......................................... 71

Figure 43 Device Information on Display .................................................. 72

Figure 44 Main Menu ................................................................................ 73

Figure 45 Alarm Limits Shown on Graph Screen ..................................... 77

Figure 46 Display Alarm Active ................................................................. 77

Figure 47 Display Alarms .......................................................................... 78

Figure 48 Modifying an Alarm Limit .......................................................... 78

Figure 49 Service Port Connector and User Port Terminal on

Motherboard ............................................................................. 81

Figure 50 Connection Example between PC Serial Port and User Port .. 82

Trend and Tendency ............................ 67

3H

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Figure 51

Figure 52 IP Configuration Menu .............................................................. 85

Figure 53 Wireless LAN Settings .............................................................. 88

Figure 54 Entering Network SSID ............................................................ 88

Figure 55 Selecting the Wireless Network Type ...................................... 88

Figure 56 Web Configuration Interface for WLAN .................................... 91

Figure 57 Opening a Serial Connection ................................................... 92

Figure 58 Opening a Telnet Connection .................................................. 93

Figure 59 Current/Voltage Switches of Output Modules ........................ 127

Figure 60 Relay Output Modes ............................................................... 133

Figure 61 FAULT/ONLINE STATUS Relay Output Modes .................... 135

Figure 62 Relay Indicators on Display .................................................... 137

Figure 63 Decrease of Sensor Gain ....................................................... 141

Figure 64 Purge Buttons on Mother bo ard .............................................. 142

Figure 65 Chemical Purge Settings ........................................................ 143

Figure 66 Performing Chemical Purge ................................................... 143

Figure 67 Serial Interface Settings ......................................................... 149

Figure 68 IP Configuration ...................................................................... 151

Figure 69 Wireless LAN Settings ............................................................ 151

Figure 70 Communication Protoco l ........................................................ 151

Figure 71 Modbus Counters ................................................................... 153

Figure 72 Changing the Sensor .............................................................. 156

Figure 73 Error Indicator and Error Message ......................................... 157

Figure 74 Adjustment and Purge Buttons .............................................. 162

Figure 75 Adjustment Menu ................................................................... 163

Figure 76 Selecting Point 1 Reference Type .......................................... 168

Figure 77 Accuracy over Temperature Range ....................................... 181

Figure 78 Accuracy in Dewpoint Me a s urement ...................................... 184

Figure 79 Transmitter Body Dimensions ................................................ 191

Figure 80 WLAN Antenna Dimensions ................................................... 192

Figure 81 PTU301 Fixed Probe Dimensions .......................................... 192

Figure 82 PTU301 Short Cable Probe Dimensions................................ 193

Figure 83 PTU303 Probe Dimensions .................................................... 194

Figure 84 PTU307 Probe Dimensions .................................................... 194

Figure 85 Optional Temperature Probe Dimensions .............................. 194

Figure 86 Duct Mounting Installation Kit ................................................. 195

Figure 87 Duct Mounting Installation Kit for T-Probe ............................. 196

Figure 88 Swagelok Installation Kit for RH-probe .................................. 197

Figure 89 Swagelok Installation Kit for T-Probe ..................................... 198

Figure 90 Cable Installation with Cable Gland ....................................... 199

Figure 91 Probe Installation with Cable Gland ....................................... 200

Figure 92 Vapor Tight Installation ........................................................... 201

Figure 93 Wall Mounting Installation ...................................................... 201

Figure 94 Meteorological Installation Kit for Outdoor Installation ........... 202

Network Interface Menu ........................................................... 85

VAISALA _________________________________________________________________________ 9

User's Guide _______________________________________________________________________

List of Tables

Table 1 Manual Revisions ..................................................................... 14

Table 2 Related Manuals ....................................................................... 14

Table 3 Application, Location Classes ................................................... 17

Table 4 Basic Quantities Measured by PTU300 ................................... 22

Table 5 Optional Quantities Measured by PTU300 ............................... 22

Table 6 Optional Pressure Quantities Measured by PTU300 ............... 22

Table 7 Wiring of the Optional 8-Pin Connector .................................... 41

Table 8 Pin Assignments to RS-232/485 Serial Output ........................ 42

Table 9 Connecting the Twisted Pair Wires to the Screw Terminals .... 58

Table 10 4-Wire (Switch 3: On) ............................................................... 59

Table 11 2-Wire (Switch 3: Off) ............................................................... 60

Table 12 Observartion Periods and Resolu tio n ....................................... 63

Table 13 Periods for Trend and Max/Min Calculations ........................... 70

Table 14 Graph Information Messages in Cursor Mode ......................... 71

Table 15 ALSEL Parameters ................................................................... 79

Table 16 Default Serial Communication Settings for the User Port ........ 81

Table 17 Communication Settings for the Service Port ........................... 83

Table 18 IP Settings for the LAN and WLAN Interfaces .......................... 84

Table 19 Wireless LAN Settings .............................................................. 87

Table 20 Measurement Commands ........................................................ 94

Table 21 Formatting Commands ............................................................. 94

Table 22 Data Recording Commands ..................................................... 95

Table 23 Chemical Purge Commands ..................................................... 95

Table 24 Calibration and Adjustment Commands ................................... 95

Table 25 Setting and Testing the Analog Outputs ................................... 95

Table 26 Setting and Testing the Relays ................................................. 96

Table 27 Pressure Commands ................................................................ 96

Table 28 GPS Commands ....................................................................... 96

Table 29 Other Commands ..................................................................... 96

Table 30 FORM Command Modifiers .................................................... 102

Table 31 Conversion Factors for Pressure Units .................................. 110

Table 32 Filtering Levels for Humidity Temperature ............................. 113

Table 33 Selection of Output Modes ..................................................... 121

Table 34 Relay State Examples ............................................................ 136

Table 35 Supported Modbus Variants ................................................... 147

Table 36 Error Messages ...................................................................... 158

Table 37 Adjustment and Calibration Commands ................................. 162

Table 38 Indicator Led Functions .......................................................... 163

Table 39 Example List for Multipoint Correction .................................... 172

Table 40 Calculated Variables (Typical Ranges) .................................. 182

Table 41 Standard Probe Cable Lengths and Approximate

Transmitter Weight (in kg/lb) .................................................. 186

Table 42 Spare Parts and Accessories ................................................. 189

Table 43 Supported Function Codes ..................................................... 207

Table 44 PTU300 Modbus Register Blocks ........................................... 208

Table 45 Measurement Data Registers ................................................. 210

Table 46 Status Registers ..................................................................... 211

Table 47 Configuration Parameter Registers ........................................ 211

Table 48 Configuration Flag Registers .................................................. 212

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Table 49

Table 50 PTU300 Modbus Diagnostics ................................................. 213

Table 51 PTU300 Modbus Device Identification ................................... 214

Table 52 PTU300 Modbus Exception Responses ................................ 214

PTU300 Exception Status Outputs ........................................ 212

VAISALA ________________________________________________________________________ 11

User's Guide _______________________________________________________________________

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12 ___________________________________________________________________ M210796EN-G

Chapter 1 _________________________________________________________ General Information

CHAPTER 1

GENERAL INFORM ATION

About This Manual

This manual provides information for installing, operating, and
maintaining the Vaisala Combined Pressure, Humidity, and Temperature
Transmitter PTU300.

Contents of This Manual

- Chapter 1, General Information, provides general notes for the manual
and the product.

- Chapter 2, Product Overview, introduces the features, advantages, and
the product nomenclature of PTU300.

- Chapter 3, Installation, provides you with information that is intended
to help you install the product.

- Chapter 4, Operation, contains information that is needed to operate
this product.

- Chapter 5, Modbus, contains information that is needed when
operating the transmitter using the Modbus protocol.

- Chapter 6, Maintenance, contains information that is needed in basic
maintenance of the product.

- Chapter 7, Calibration and adjustment, provides information and
instructions concerning calibration and adjustment of PTU300.

- Chapter 8, Technical data, provides the technical data of the product.

- Appendix A, Probe installation kits and installation examples, presents
the installation kits available for PTU300 and provides some
installation examples.

- Appendix B, Calculation Formulas, presents the formulas used for the
calculated output quantities.

- Appendix C, Modbus Reference, describes the Modbus functions and
data of the transmitter.

VAISALA ________________________________________________________________________ 13

User's Guide _______________________________________________________________________

Manual Code

Description

M210796EN-G

December 2013. This manual. Applicable from

Various small corrections.

M210796EN-F

Previous version. Applicable from transmitter

temperature range.

Manual Code

Manual Name

M210195EN

PTU200 Series Transmitters User´s Guide

Warning
instructions very carefully at this point, there is a risk of injury or even
death.

Caution warns you of a potential hazard. If you do not read and follow
instructions carefully at
important data could be lost.

Version Information

Table 1 Manual Revisions

transmitter software version 5.14 onward.
Removed references to HUMICAP ®180L2
sensor. Added new command descriptions:
ALSEL, AOVER, CON, DSEND, MODS,
RGLIMIT, RHLIMIT, and M PC RH (multipoint RH
calibration). Updated FILT command description.

software version 5.10 onwar d.
Added Modbus protocol. Updated serial line
command descriptions. Updated storage

Related Manuals

WARNING

CAUTION

Table 2 Related Manuals

Documentation Conventions

Throughout the manual, important safety considerations are highlighted
as follows:

alerts you to a serious hazard. If you do not read and follow

this point, the product could be damaged or

NOTE

Note highlights important information on using the product.

14 ___________________________________________________________________ M210796EN-G

Chapter 1 _________________________________________________________ General Information

Ground the product, and verify outdoor installation grounding
periodically to minimize shock hazard.

Do not modify the unit. Improper modification can damage the product,
lead to malfunction, or make the product
legislation.

Safety

The PTU300 delivered to you has been tested for safety and approved as
shipped from the factory. Note the following precautions:

WARNING

CAUTION

noncompliant with applicable

ESD Protection

Electrostatic Discharge (ESD) can cause immediate or latent damage to
electronic circuits. Vaisala products are adequately protected against
ESD for their intended use. However, it is possible to damage the product
by delivering electrostatic discharges when touching, removing, or
inserting any objects inside the equipment housing.

To make sure you are not delivering high static voltages yourself:

- Handle ESD sensitive components on a properly grounded and
protected ESD workbench. When this is not possible, ground yourself
to the equipment chassis before touching the boards. Ground yourself
with a wrist strap and a resistive connection cord. When neither of the
above is possible, touch a conductive part of the equipment chassis
with your other hand before touching the boards.

- Always hold the boards by the edges and avoid touching the
component contacts.

VAISALA ________________________________________________________________________ 15

User's Guide _______________________________________________________________________

Recycle all applicable material.

Dispose of the unit according
with regular household refuse.

Recycling

to statutory regulations. Do not dispose of

Regulatory Compliances

EU Declaration of Conformity

Vaisala Combined Pressure, Humidity, and Temperature Transmitter
PTU300 is in conformity with the provisions of the following EU
directives:

- Low Voltage Directive

- EMC-Directive
Conformity is shown by compliance with the following standards:

- EN 60950-1: Information technology equipment – Safety – Part 1:
General requirements.

- EN 61326-1: Electrical equipment for measurement, control, and
laboratory use – EMC requirements – for use in industrial locations.

- EN 550022: Information technology equipment – Radio disturbance
characteristics – Limits and methods of measurement.

- EN 61000-3-2: Limits for harmonic current emissions.

- EN 61000-3-3: Limitation of voltage changes, voltage fluctuations
and flicker in public low-voltage supply systems.

16 ___________________________________________________________________ M210796EN-G

Chapter 1 _________________________________________________________ General Information

Type

PTU300

Temperature

B

Humidity

B

Vibration

A

EMC

B

Enclosure

B/IP65

DNV Type Approval

The Vaisala Combined Pressure, Humidity, and Temperature Transmitter
PTU300 is found to comply with Det Norske Veritas' Rules for
Classification of Ships, High Speed & Light Craft and Det Norske
Veritas' Offshore standards.

Applicable tests carried out according to Standard for Certification
No. 2.4, April 2006.

Table 3 Application, Location Classes

TYPE APPROVED PRODUCT

CERTIFICATE NO.: A-13529

Transmitters with LAN or WLAN Interface

This equipment has been tested and found to comply with the limits for a
Class B digital device, pursuant to Part 15 of the FCC Rules. These limits
are designed to provide reasonable protection against harmful
interference in a residential installation. Operation is subject to the
following two conditions: (1) this device may not cause interference, and
(2) this device must accept any interference, including interference that
may cause undesired operation of the device.

This equipment generates, uses and can radiate radio frequency energy
and, if not installed and used in accordance with the instructions, may
cause harmful interference to radio communications. However, there is
no guarantee that interference will not occur in a particular installation. If
this equipment does cause harmful interference to radio or television

VAISALA ________________________________________________________________________ 17

User's Guide _______________________________________________________________________

reception, which can be determined by turning the equipment off and on,
the user is encouraged to try to correct the interference by one or more of
the following measures:

- Reorient or relocate the receiving antenna.

- Increase the separation between the equipment and receiver.

- Connect the equipment into an outlet on a circuit different from that to
which the receiver is connected.

- Consult the dealer or an experienced radio/TV technician for help.

Transmitters with WLAN Interface

This device has been designed to operate with a 2 dBi half-wave antenna.
Antennas with a gain greater than 2 dBi are prohibited for use with this
device. The antenna impedance is 50 ohms.

To reduce potential radio interference to other users, the antenna type and
its gain should be so chosen that the equivalent isotropically radiated
power (EIRP) is not more than that permitted for successful
communication.

This Class [B] digital apparatus complies with Canadian ICES-003.
Cet appareil numérique de la classe [B] est conforme à la norme NMB-

003 du Canada.

Patent Notic e

The Vaisala HUMICAP® Humidity, and Temperature Transmitter Series
PTU300 is protected by, for example, the following patents and their
corresponding national rights:

Finnish patents 98861 and 99164, French patents 6650303 and 9504397,
German patents 69418174 and 19513274, Japanese patents 3585973 and
2801156, UK patents 0665303 and 2288465, and U.S. patent 5607564.

Trademarks

HUMICAP® and BAROCAP® are registered trademarks of Vaisala Oyj.
All other trademarks are the property of their respective owners.

18 ___________________________________________________________________ M210796EN-G

Chapter 1 _________________________________________________________ General Information

Software License

This product contains software developed by Vaisala. Use of the software
is governed by license terms and conditions included in the applicable
supply contract or, in the absence of separate license terms and
conditions, by the General License Conditions of Vaisala Group.

Warranty

Visit our Internet pages for standard warranty terms and conditions:

www.vaisala.com/warranty.

Please observe that any such warranty may not be valid in case of
damage due to normal wear and tear, exceptional operating conditions,
negligent handling or installation, or unauthorized modifications. Please
see the applicable supply contract or Conditions of Sale for details of the
warranty for each product.

VAISALA ________________________________________________________________________ 19

User's Guide _______________________________________________________________________

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20 ___________________________________________________________________ M210796EN-G

Chapter 2 ___________________________________________________________ Product Overview

CHAPTER 2

PRODUCT OVERVIE W

This chapter introduces the features, advantages, and the product
nomenclature of the Vaisala Combined Pressure, Humidity, and
Temperature Transmitter PTU300.

Introduction to PTU300

The PTU300 transmitter provides reliable pressure measurement in a
wide range of applications. PTU300 series transmitters use a
BAROCAP® silicon capacitive absolute sensor developed by Vaisala for
barometric pressure measurement applications. The measurement
principle of the PTU300 series digital transmitters is based on an
advanced RC oscillator and three reference capacitors against which the
capacitive pressure sensor is continuously measured. The microprocessor
of the transmitter performs compensation for pressure linearity and
temperature dependence.

The applications of the PTU300 range from calibration laboratory
environmental condition monitoring to laser interferometer active
wavelength compensation and GPS meterorological measurements.

The PTU300 transmitter combines three measurement parameters:
pressure, temperature and humidity. The quantities measured and
calculated by PTU300 are presented in Table 4 on page 22. The
quantities available as an option are presented in Table 5 on page 22.

Analog outputs can be chosen between current and voltage signals.
Alternatively, digital outputs RS-232 (standard) or RS-422/485 (optional)
can be selected. A local display is also available.

The PTU300 transmitter is available with one or two pressure
transducers. The PTU301, PTU303 and PTU307 probes are available for
the PTU300 transmitter. A PTU30T model with only the temperature
probe (no humidity measurement) is also available.

In outdoor applications it is recommended to use the HMT330MIK
mounting kit with the PTU300 transmitters.

VAISALA ________________________________________________________________________ 21

User's Guide _______________________________________________________________________

Quantity

Abbreviation

Metric Unit

Non-Metric Unit

Pressure

P

See Table 6 on page 22.

Relative Humidity1)

RH

%RH

%RH

Temperature

T

ºC

ºF

Quantity

Abbreviation

Metric Unit

Non-Metric Unit

Dewpoint /Frostpoint Temperature (T

d/f

)

TDF

ºC

ºF

Dewpoint Temperature (Td)

TD

ºC

ºF

Absolute humidity (a)

A

g/m3

gr/ft3

Mixing ratio (x)

X

g/kg

gr/lb

Wetbulb temperature (Tw)

TW

ºC

ºF

Humid air volume/ dry air volume
(by volume or by weight) (H2O)

H2O

ppmv/ppmw

ppmv/ppmw
Water vapor pressure (Pw)

PW

hPa

lb/in2

Water vapor saturation pressure (Pws)

PWS

hPa

lb/in2

Enthalpy (h)

H

kJ/kg

Btu/lb

Difference of T and T

d/f

(∆T)

DT

ºC

ºF

Quantity

Abbreviation

Units Available

Pressure trend and tendency

P3h

hPa, psia, inHg, torr, bara, barg,

Pressure (measures average pressure
from P1 and P2 if both are connected)

P
Pressure from transducer 1 or 2

P1 and P2

QNH pressure

QNH

QFE pressure

QFE

Height Corrected Pressure

HCP

Table 4 Basic Quantities Measured by PTU300

1) Relative humidity not included on the PTU30T model

Table 5 Optional Quantities Measured by PTU300

Table 6 Optional Pressure Quantities Measured by PTU300

psig, mbar, mmHg, kPa, Pa,

O, inH2O

mmH

2

22 ___________________________________________________________________ M210796EN-G

Chapter 2 ___________________________________________________________ Product Overview

Basic Features an d Options

- Pressure redundancy option: two sensors in one unit

- Two accuracy classes for pressure measurement

- Several probes for various applications

- A 3 h trend and tendency available in pressure measurement

- Calculated output quantities available

- User-friendly display and keypad interface (optional)

- Different probe mounting kits, sensor protection options and probe
cable lengths

- Transmitter mounting kits for multiple installation purposes

- Chemical purge for applications where interfering chemicals in the
measuring environment pose a risk

- Warmed probe and sensor heating for high humidity conditions
(PTU307)

- Support for Modbus serial communications protocol

- Optional temperature sensor for PTU307

- Optional modules:

- Isolated power supply

- Power supply module for AC mains power

- RS-422/485-module

- LAN and WLAN interfaces

- Data logger module with real time clock

- Additional analog output module

- Relay module

New and Improved Features Compared to PTU200

- Improved %RH accuracy

- Graphical display (trend of any parameter)

- Analog outputs (voltage and current)

- Service port for MI70 or PC

- Support for Modbus serial communications protocol

- USB connectivity for service connections via the optional
USB-RJ45 cable

- Isolated RS-485 module (using single barometer module)

- Relay module (using single barometer module)

- LAN and WLAN interfaces (using single barometer module)

- Data logger module with real time clock (using single barometer
module)

VAISALA ________________________________________________________________________ 23

User's Guide _______________________________________________________________________

The numbers refer to Figure 1 above:

1 = Signal + powering cable gland, or WLAN antenna connector

2 = Pressure port

3 = Cable gland for optional module or AC mains cable

4 = Cover screw (4 pcs)

5 = Display with keypad (optional)

6 = Cover LED

Structure of the Transmitter

Figure 1 Transmitter Body

1104-078

24 ___________________________________________________________________ M210796EN-G

Chapter 2 ___________________________________________________________ Product Overview

The following numbers refer to Figure 2 above:

1 = Service port (RS-232)

2 = DIP switches for analog output settings

3 = Power supply and signal wiring screw terminals

4 = Relay, RS-422/485, data logger, LAN, WLAN, or analog
output module (optional)

5 = Grounding connector for power supply module

6 = Adjustment buttons (chemical purge buttons) with indicator
LED

7 = Galvanic isolation module (optional)

8 = Temperature probe cable

9 = Humidity probe cable

10 = BARO-1 module

11 = Pressure port

12 = Power supply module.

Figure 2 Inside the Transmitter

0604-060

VAISALA ________________________________________________________________________ 25

User's Guide _______________________________________________________________________

Probe Options

The PTU301 is intended for wall-mounted applications. The standard
version has a fixed probe.

1104-079

Figure 3 PTU301 Fixed Probe

The PTU301 short cable probe is a special version for use with the
WLAN module, and when LAN module and power supply module are
simultaneously installed. It has the general use PTU303 probe on a short
cable (21 cm), and a mounting plate with a probe holder.

1104-080

Figure 4 PTU301 Short Cable Probe

26 ___________________________________________________________________ M210796EN-G

Chapter 2 ___________________________________________________________ Product Overview

The following numbers refer to Figure 5 above:

1 = PTU303 Probe for general use

2 = PTU307 for demanding processes (optionally warmed probe)

3 = Temperature probe

0911-067

Figure 5 Probe Options

For probe cable lengths, see Table 41 on page 186.

VAISALA ________________________________________________________________________ 27

User's Guide _______________________________________________________________________

Warmed Probe PTU307

Temperature difference between the probe and external environment can
cause a risk of condensation on the sensor. A wet probe cannot observe
the actual humidity in the ambient air. If the condensed water is
contaminated, the life span of the probe may shorten and calibration may
change.

PTU307 probe shall be used in applications where condensation can
occur due to high humidity and rapid humidity changes. The warmed
probe is heated continuously so that its temperature is always higher than
that of the environment. This prevents condensation on the probe. The
power consumption of the warmed probe is slightly higher than that of
the other probes.

28 ___________________________________________________________________ M210796EN-G

Chapter 3 ________________________________________________________________ Installation

CHAPTER 3

INSTALLATION

This chapter provides you with information that is intended to help you
install the product.

Mounting the Housing

The housing can be mounted either without the mounting plate or with
optional mounting plates.

Standard Mounting witho ut Mount ing Plate

Mount the housing by fastening the transmitter to the wall with 4 screws,
for example, M6 (not provided).

0601-011

Figure 6 Standard Mounting

VAISALA ________________________________________________________________________ 29

User's Guide _______________________________________________________________________

The following numbers refer to Figure 7 above:

1 = Plastic mounting plate

2 = Mount the plate to wall with 4 screws M6 (not provided)

3 = Arched side up

4 = Fasten PTU300 to the mounting plate with 4 fixing screws M3
(provided)

5 = Holes for wall/junction box mounting

183 (7.20)

133 (5.24)

116 (4.57)

104 (4.09)

84 (3.30)

59 (2.32)

59 (2.32)

Ø6.2 (0.24)

4.5 (0.18)

10.5 (0.41)

6.5 (0.26)

8.5 (0.33)

Thickness

9.5 (0.37)

Wall Mounting with Wall Mounting Kit

When mounting with wall mounting kit the mounting plate (Vaisala
order code 214829) can be installed directly on wall or onto a standard
wall box (also US junction box). When wiring through back wall, remove
the plastic plug from the wiring hole in the transmitter before mounting.

0503-004

Figure 7 Mounting with Wall Mounting Kit

Figure 8 Dimensions of the Plastic Mounting Plate (mm/inch)

30 ___________________________________________________________________ M210796EN-G

0804-065

Chapter 3 ________________________________________________________________ Installation

The PTU301 short cable probe is designed to be wall mounted with the
probe holder plate (Vaisala order code 226252). The probe holder plate is
similar to the standard mounting plate, except for the probe holder at the
bottom.

0911-061

Figure 9 Dimensions of the Probe Holder Plate (mm/inch)

VAISALA ________________________________________________________________________ 31

User's Guide _______________________________________________________________________

The following numbers refer to Figure 11 above:

1 = U-bolts (2 pcs) M8 (provided) for 30 ... 102 mm poles

2 = Mounting nuts M8 (4 pcs)

Mounting with DIN Rail Installation Kit

DIN rail installation kit includes a wall mounting kit, 2 clip-fasteners and
2 screws M4 x 10 DIN 7985 (Vaisala order code 215094).

1. Attach two spring holders to the plastic mounting plate by using the
screws provided in the installation kit.

2. Fasten PTU300 to the plastic mounting plate with 4 screws
(provided).

3. Press the transmitter onto the DIN rail so that the clip-fasteners
snap into the rail.

0503-002

Figure 10 Mounting with DIN Rail Installation Kit

Pole Installation with Installation Kit for Pole or Pipeline

Installation kit for pole or pipeline (Vaisala order code: 215108) includes
the metal mounting plate and 4 mounting nuts for pole mounting. When
mounting, the arrow in the metal mounting plate must point upward;
see Figure 13 on page 33.

0503-006

Figure 11 Vertical Pole

32 ___________________________________________________________________ M210796EN-G

Chapter 3 ________________________________________________________________ Installation

Number refers to Figure 12 above:

1 = Mounting nuts M8 (4 pcs)

The following numbers refer to Figure 13 above:

1 = Mount the plate to wall with 4 screws M8 (not provided)

2 = Fasten the PTU300 to the mounting plate with 4 fixing screws
M6 (provided)

3 = Note the position of the arrow when mounting. This side must
be up when mounting.

0503-007

Figure 12 Horizontal Pole

Metal mounting plate is included in rain shield with installation kit and
installation kit for pole or pipeline.

0503-041

Figure 13 Mounting with Metal Wall Mounting Plate

VAISALA ________________________________________________________________________ 33

User's Guide _______________________________________________________________________

The following numbers refer to Figure 15 above:

1 = Fasten the rain shield with installation kit (Vaisala order code:

215109) to the metal mounting plate with 2
screws (provided)

2 = Fasten the mounting plate with rain shield with installation kit to
the wall or to the pole (see pole installation)

3 = Fasten the transmitter to the mounting plate with 4 fixing screws
(provided)

0509-151

Figure 14 Dimensions of Metal Mounting Plate (mm/inch)

Mounting Rain Shield with Inst a lla t ion Kit

The rain shield is highly recommended for outdoor installations,
especially for transmitters with the display/keypad option.

0503-008

Figure 15 Mounting Rain Shield with Installation Kit

(M6) mounting

34 ___________________________________________________________________ M210796EN-G

Chapter 3 ________________________________________________________________ Installation

The following numbers refer to Figure 16 above:

1 = Panel (not included)

2 = Panel mounting frame

Panel Mounting Frame

To enable a neat and dirt free embedded installation of the transmitter, a
panel mounting frame is available as an option (Vaisala order code:

216038). The frame is a thin, flexible plastic frame for the transmitter,
with adhesive tape on one side.

The frame is used to hide any rough edges of the installation hole, and
provide a more finished look. Note that the panel mounting frame is not
intended to bear the weight of the transmitter, and does not include any
mounting supports.

Use the panel mounting frame as follows:

1. Use the frame as a template to mark the required size for the

installation hole in the panel.

2. Cut the hole in the panel.

3. Mount the transmitter through the panel with suitable supports.

4. Remove the paper protecting the adhesive tape on the frame, and

attach the frame around the transmitter. Refer to Figure 16 on page

35.

0704-002

Figure 16 Panel Mounting Frame

VAISALA ________________________________________________________________________ 35

User's Guide _______________________________________________________________________

0804-083

Figure 17 Panel Mounting Dimensions (mm/inch)

36 ___________________________________________________________________ M210796EN-G

Chapter 3 ________________________________________________________________ Installation

The following numbers refer to Figure 18 above:

1 = Cable for signal/powering Ø8 ... 11 mm

2 = Pressure port

3 = Cable for optional power supply module Ø8 ... 11 mm

When there is high electric noise level (for example,
electric motor) in the operating environment it is recommended to use
shielded cable or take care that the signal cables are separated from other
cables.

Wiring

Cable Bushings

A single electrical cable with a screen and three to ten wires is
recommended for power and analog/serial connections. The cable
diameter should be 8 ... 11 mm. The number of cable bushings depends
on the transmitter options. See the following recommendations for the
cable bushings:

NOTE

Figure 18 Cable Bushings

0604-059

near powerful

VAISALA ________________________________________________________________________ 37

User's Guide _______________________________________________________________________

Grounding the Cables

Ground the screen of the electrical cable properly to achieve the best
possible EMC performance.

0605-027

Figure 19 Grounding the Screen of Electrical Cable

Refer to Figure 19 above when performing the procedure below.

1. Cut back outer sheath to desired length.

2. Cut back screen braiding or screen foil to dimension X.

3. Push the domed cap nut (item 1) and the seal insert with contact
socket of the gland (item 2+3) onto the cable as shown in the
diagram.

4. Bend over the screen braiding or screen foil by about 90º (item 4).

5. Push the seal insert with the contact socket of the gland (item 2+3)
up to the screen braiding or screen foil.

6. Mount the lower part (item 5) on the housing.

7. Push the seal with the contact socket of the gland (item 2+3)
into the lower part (item 5).

8. Install the domed cap nut (item 1) onto the lower part (item 5).

38 ___________________________________________________________________ M210796EN-G

Chapter 3 ________________________________________________________________ Installation

Grounding the Transmitter Housing

In case you need to ground the transmitter housing, the grounding
connector is found inside the housing; see Figure 2 on page 25. Make
sure that the probe is connected to the same potential as the housing, and
that different groundings are made to the same potential. Otherwise
harmful ground currents may be generated.

If it is needed to have galvanic isolation of the power supply line from
the output signals, PTU300 can be ordered with optional galvanic
isolation module. This module prevents harmful grounding loops.

Alternate Wiring Systems

There are three optional ways to connect the transmitter: using basic
wiring, using 8-Pin connector, or using D-9 connector.

The wiring system is selected when ordering the device. If a connector is
needed for wiring, it is set at the factory.

- When using basic wiring, see section Signal and Power Supply

Wiring.

- When using 8-Pin connector, see section 8-Pin Connector on page 41.

- When using D-9 connector, see section D-9 Connector on page 42.

VAISALA ________________________________________________________________________ 39

User's Guide _______________________________________________________________________

The following numbers refer to Figure 20 above:

1 = Power supply terminals 10 ... 35 VDC, 24 VAC

2 = User port (RS-232 terminals)

3 = Analog signal terminals

Make sure that you connect only de

Signal and Power Supply Wiring

When wiring the power supply module, see section Power Supply
Module on page 48.

0506-028

WARNING

Figure 20 Screw Terminal Block on Motherboard

-energized wires.

1. Open the transmitter cover by taking out the four cover screws.

2. Insert the power supply wires and signal wires through the cable
bushing in the bottom of the transmitter; see the grounding
instructions in the previous sections.

3. Connect the analog output cables to terminals: Ch1 +, Ch1-, Ch2+,
Ch2-. Connect the RS-232 user port cables to terminals RxD, GND
and TxD. For more information about the RS-232 connection refer
to section Serial Line Communication on page 81.

4. When wiring the optional modules, see the corresponding section
for instructions:

- RS-422/485 Interface on page 57

- Relays on page 55

- Third Analog Output on page 53

- LAN Interface on page 61

- WLAN Interface on page 62

40 ___________________________________________________________________ M210796EN-G

Chapter 3 ________________________________________________________________ Installation

Pin

Wire

Serial Signal

Analog Signal

RS-232 (EIA-232)

RS-485 (EIA-485)

1

White

Data out TX

D1+

Ch 3-

2

Brown

(Serial GND)

(Serial GND)

Signal GND (for
channels 1&2)

3

Green

-

-

Ch 2+

4

Yellow

-

-

Ch 1+

5

Grey

Supply -

Supply -

Supply -

6

Pink

Supply +

Supply +

Supply +

7

Blue

Data in RX

D0-

Ch 3+

8

Shield/Red

Cable shield

Cable shield

Cable shield

The 8
module that have AC (mains) power connection.

5. Connect the power supply wires to the connectors: POWER

10...35V+ 24V~ (+) and (-) terminals. If you are using 24 VAC
power supply, see the note below before connecting the supply
wires.

6. Turn on the power. The indicator LED on the cover is lit

continuously during normal operation.

7. Close the cover and replace the cover screws. The transmitter is

ready for use.

8-Pin Connector

NOTE

1104-126

Figure 21 Pinout of the Optional 8-Pin Connector
Table 7 Wiring of the Optional 8-Pin Connector

-pin connector cannot be used with relay modules or power supply

VAISALA ________________________________________________________________________ 41

User's Guide _______________________________________________________________________

Pin

Wire Color

Serial Signal

RS-232 C

RS-485

1

Red

2

White

TX 3

Black

RX 4

Yellow

5

Brown

Ground

6 Green

D0- 7 Blue

Ground for supply voltage

Ground for supply voltage

8

Grey

D1+

9

Orange

Supply voltage

Supply voltage

D-9 Connector

0605-123

Figure 22 Wiring of Optional D-9 Connector
Table 8 Pin Assignments to RS-232/485 Serial Output

42 ___________________________________________________________________ M210796EN-G

Chapter 3 ________________________________________________________________ Installation

24

To prev
connected to a "
must connect the same wire on the "

Connections to a 24 VAC Power Supply

Separate floating supply for each transmitter is recommended (see the
upper part of Figure 23 below). If you have to connect several
transmitters or other instruments to one AC supply, the phase (~) must
always be connected to the (+) connector of each transmitter (see the
lower part of Figure 23).

CAUTION

VAC POWER SUPPLY USE

ent fire and/or damage, if either 24 VAC wire is grounded or

-", "0", or "GND" terminal of any other device, you

-" terminal also on this instrument.

VAISALA ________________________________________________________________________ 43

Figure 23 Connections to 24 VAC Power Supply

0703-041

User's Guide _______________________________________________________________________

Probe Mounting

In humidity measurement and especially in calibration it is essential that
temperature of the probe and measuring environment is the same. Even a
small difference in temperature between the environment and the probe
causes an error. As the curve below shows, if the temperature is +20 °C
and the relative humidity 100 %RH, a difference of ±1 °C between the
environment and the probe causes an error of ±6 %RH.

The graph below illustrates the measurement error at 100 %RH when the
difference between the ambient and sensor temperature is 1 °C.

0507-023

Figure 24 Measurement Error at 100 %RH

General Instruct ions for Probes with Cable

Mount the probes with a cable with the probe horizontally; this way, any
water condensing on the tube cannot flow onto the sensor.

When there is no alternative but to install the probe in the process
vertically, the point of entry must be carefully insulated. The cable must
also be allowed to hang loosely as this prevents any condensed water
from running onto the probe along the cable.

44 ___________________________________________________________________ M210796EN-G

Chapter 3 ________________________________________________________________ Installation

The following numbers refer to Figure 25 above:

1 = To be sealed

2 = To be insulated

3 = Insulate the cable

4 = Let the cable hang loosely. This prevents condensed water
running to the sensor along the cable.

The following numbers refer to Figure 26 above:

1 = To be sealed

2 = Insulate the cable

3 = To be insulated

4 = Let the cable hang loosely. This prevents condensed water
running to the sensor along the cable.

0507-024

Figure 25 Horizontal Mounting of Probe

Figure 26 Vertical Mounting of Probe

VAISALA ________________________________________________________________________ 45

0507-022

User's Guide _______________________________________________________________________

Please do not attach a heated probe (PTU307) to metal structures to
avoid condensation problems caused by heat conduction along the metal.

NOTE

If the process temperature is much higher than that of the environment,
the whole probe and preferably plenty of cable must be inside the
process. This prevents measuring inaccuracy caused by heat conduction
along the cable.

When mounted on the side of a duct or channel, the probe must be
inserted from the side of the duct. If this is not possible and the probe
must be inserted from the top, the point of entry must be carefully
insulated.

For Vaisala probe installation kits and some installation examples see
Appendix A on page 195.

PTU303 for General Use

The PTU303 is a small size (d=12mm) probe for general use, up to
+80 °C (+176 °F). The probe is suitable for weather stations,
environmental compensations, laser interferometers and test benches. It
is suitable for ducts and channels with the installation kit available from
Vaisala.

46 ___________________________________________________________________ M210796EN-G

Chapter 3 ________________________________________________________________ Installation

See Appendix A on page 195 for the following probe installation kits for
PTU303 and installation examples.

- Duct mounting kit

- Cable gland

PTU307 for High Humidi t ies

The PTU307 is for environment where relative humidity is very high,
near saturation. The warmed probe prevents the saturation of the sensor.
An additional temperature probe is also available.

The PTU307 RH+T probe is suitable for temperatures up to +180°C
(+356°F). Note that the operational temperature limit for the PTU307
probe is higher than for the PTU300 transmitter itself. The upper
temperature limit for barometric pressure measurement is +60°C (140°F).

See Appendix A on page 195 for a presentation of the following probe
installation kits for PTU307 with installation examples:

- Duct mounting kit

- Cable gland

- Pressure tight Swagelok connector

- Vaisala's Meteorological Installation kit
The installation kits are available for both humidity and temperature

probe.

Temperature Probe (Optional)

An additional temperature probe is available to measure the ambient
temperature on the PTU307 (with probe warming) and PTU30T
transmitter models. The additional temperature probe allows you to
measure other humidity quantities apart from dewpoint and mixing ratio.
The temperature probe must be connected to the transmitter at the
factory. Do not cut and re-connect the cable yourself.

You must install the additional temperature probe in the same
measurement environment as the PTU307 probe. Make sure that heat
does not transfer from the warmed probe to the temperature probe.

VAISALA ________________________________________________________________________ 47

User's Guide _______________________________________________________________________

The following numbers refer to Figure 27 above:

1 = Connect AC (mains) voltage wires to these terminals

2 = Grounding terminal

3 = In case the module is not installed in the factory: Connect wires
from these terminals to the

terminals of

the motherboard.

4 = + 5 =

-

Optional Modules

Power Supply Module

The AC (mains) power connection may be connected to the power supply
module only by an authorized electrician. A readily accessible disconnect
device shall be incorporated in the fixed wiring.

0506-027

Figure 27 Power Supply Module

POWER 10 ... 35V 24V

48 ___________________________________________________________________ M210796EN-G

Chapter 3 ________________________________________________________________ Installation

Do not detach the power supply module from the transmitter when the
power is on.

Do not connect the mains power to power supply module when it is not
i

Always connect protective ground terminal.

Installation

1. Disconnect the power and open the transmitter cover.

2. Remove the protective plug from the cable gland and thread the

wires. In case the power supply module is installed in the factory,
continue with the step 5.

3. To attach the module fasten the power module to the bottom of the

housing with four screws. See the position Figure 2 on page 25.

4. Connect the wires from the terminals of the power supply module

marked with + and - to the terminals POWER 10 ... 35 V 24V on
the motherboard of the transmitter.

5. Connect the AC mains voltage wires to the power supply module

terminals marked with N and L.

6. Attach the grounding wire to the grounding terminal on the right-

hand side of the transmitter.

7. Connect the power. The LED on the cover of the transmitter is lit

continuously during normal operation.

WARNING

WARNING

WARNING

nstalled in the transmitter.

VAISALA ________________________________________________________________________ 49

User's Guide _______________________________________________________________________

Warnings

Dieses Produkt entspricht der Niederspannungsrichtlinie (2006/95/EWG).

- Das Netzmodul darf nur von einem dazu befugten Elektriker angeschlossen werden.

- Trennen Sie das Netzmodul nicht vom Messwertgeb er , wenn der Strom eingeschaltet ist.

- Verbinden Sie das Netzmodul nur mit der Spannungsquelle, wenn es im Messwertgeber

PTU300 montiert ist.

- Das Erdungskabel muss zum Schutz immer angeschlo s s en sein.

Ce produit est conforme à la Directive relative à la Basse Tension (2006/95/EEC).

- Seul un électricien compétent est habilité à raccorder le module d’alimentation au secteur.

- Ne pas détacher le module d’alimentation du transmetteur lorsqu’il est en ser vi ce.

- Ne pas raccorder le secteu r au module d’alimentatio n lorsque celui-ci n’est pas installé dans le

transmetteur PTU300.

- Toujours raccorder un bornier de protection à la terre.

Tämä tuote on pienjännitedirektiivin (2006/95/EEC) mukain e n .

- Vaihtovirtaliitännän saa kytkeä tehonsyöttömoduuliin ainoastaan valtuutettu sähköasentaja

- Älä irrota tehonsyöttömoduulia lähettimestä, kun virta on kytkettynä.

- Älä kytke verkkovirtaa tehonsyöttömoduuliin, jos kyseistä moduulia ei ole asennettu PTU300

lähettimeen.

- Kytke aina maadoitusliittimet.

Denna produkt uppfyller kraven i direktivet om lågspänning (2006/95/EEC).

- Nätanslutningen (växelströmsanslutningen) får bara anslutas till strömförsörjningsmodulen av

en behörig elektriker.

- Ta inte loss strömförsörjningsmodulen från mätaren när strömmen är på.

- Anslut inte strömförsörjningsmodulen till nätet när den inte är installerad i PTU300-mätaren

- Anslut alltid en skyddande jordningsplint.

Questo prodotto è conforme alla Direttiva sul basso voltaggio (2006/95/CEE).

- La conduttura elettrica può essere collegata al modulo di alimentazione elettrica soltanto da

un elettricista au to r izzato.

- Non staccare l’al imentazione elettrica dal trasmettitore quando è acceso.

- Non collegare la corrente elettrica al modulo di alimentazione elettrica se non è installato nel

trasmettitore PTU300.

- Collegare sempre il morsetto protettivo a terra!

50 ___________________________________________________________________ M210796EN-G

Chapter 3 ________________________________________________________________ Installation

Dette produkt er i overensstemmelse med direktivet om lavspænding
(2006/95/EØS).

- Netstrømskoblingen til må kun tilsluttes strømforsyningsmodulet af en autoriseret elinstallatør

- Strømforsyningsmodulet må ikke løsgøres fra senderen, mens spændingen er sluttet til.

- Slut ikke netspændingen til strømfo rsyningsmodulet, når det ikke er installeret i PTU300-

senderen

- Forbind altid den beskyttende jordklemme!

Dit product voldoet aan de eisen van de richtlijn 2006/95/EEG
(Laagspanningsrichtlijn).

- De stroom kan aan de stroomtoevoer module aangesloten worden alleen door een bevoegde

monteur.

- Het is niet toegestaan de stroomtoevoer module van de transmitter los te koppelen wanneer de

stroom aan is.

- Het is niet toegestaan de stroom aan de stroomtoevoer module aan te sluiten als deze niet in

een PTU300-transmitter is gemonteerd.

- Altijd beschermend aard contact aansluiten!

Este producto cumple con la directiva de bajo voltaje (2006/95/EEC).

- La conexión de la alimentación principal al módulo de alimentación sólo puede realizarla un

electricista autorizado.

- No desenchufe el módulo de alimentación del transmisor cuando esté encendido.

- No conecte la alimentación principal al módulo de alimentación cuando no esté instalado en

el transmisor PTU300.

- Conecte siempre el terminal de protección de conexión a tierra.

See toode vastab madalpinge direktiivile (2006/95/EEC).

- Voolukaabli võib vooluallika mooduli külge ühendada ainult volitatud elektrik.

- Ärge ühendage vooluallika moodulit saatja küljest lahti, kui vool on sisse lülitatud.

- Ärge ühendage voolukaablit vooluallika mooduli külge, kui seda pole PTU300-tüüpi saatjasse

paigaldatud.

- Ühendage alati kaitsev maandusklemm!

Ez a termék megfelel a Kisfeszültségű villamos termékek irányelvnek

(2006/95/EGK).

- A hálózati feszültséget csak feljogosított elektrotechnikus csatlakoztathatja a

tápegységmodulra.

- A bekapcsolt távadóról ne csatolja le a tápegységmodult.

- Ne csatlakoztassa a háló zati feszültséget a tápegységmodulhoz, ha az nincs beépítve a

PTU300 távadóba.

- Feltétlenül csatlakoztasson földelő védőkapcsot!

VAISALA ________________________________________________________________________ 51

User's Guide _______________________________________________________________________

Šis produktas atitinka direktyvą dėl žemos įtampos prietaisų (2006/95/EB).

- Elektros tinklą su energijos tiekimo moduliu sujungti gali tik įgaliotas elektrikas.

- Niekada neišimkite energijos tiekimo modulio iš siųstuvo, kai maitinimas yra įjungtas.

- Jei energijos tiekimo modulis nėra įmontuotas PTU300 siųstuve, nejunkite jo į elektros tinklą.

- Visada prijunkite prie apsauginės įžeminimo jungties!

Šis produkts atbilst Zemsprieguma direktīvai (2006/95/EEC).

- Strāvas pieslēgumu var pieslēgt pie barošanas avota moduļa tikai autorizēts elektriķis.

- Neatvienot barošanas avota moduli no raidītāja, kad pieslēgta strāva.

- Nepievienot strāvu barošanas avota modulim, ja tas nav uzstādēts PTU300 raidītājā

- Vienmēr pievienot aizsargājošu iezemētu terminālu !

Ten produkt spełnia wymogi Dyrektywy niskonapięciowej (2006/95/EEC).

- Napięcie zasilające powinno zostać podłączone do modułu zasilacza tylko przez

wykwalifiko w a nego elektryka .

- Nie wolno odłączać modułu zasilacza od nadajnika, kiedy zasilanie jest włączone.

- Nie wolno podłączać napięcia zasilającego do modułu zasilacza, kiedy nie jest on

zamontowany w nadajniku PTU300.

- Zawsze należy podłączać zabezpieczający zacisk uziemiający!

Tento výrobek vyhovuje Směrnici pro nízké napětí (2006/95/EEC).

- Připojení síťového napájení k napájecímu modulu smí provádět pouze oprávněný elektrikář.

- Neodpojujte napájecí modul od snímače při zapnutém napájení.

- Nepřipojujte síťové napájení k napájecímu modulu, pokud není instalován ve snímači

PTU300.

- Vždy zapojte ochrannou zemnící svorku!

52 ___________________________________________________________________ M210796EN-G

Chapter 3 ________________________________________________________________ Installation

G
supply module.
incompatible to be installed at the same time. If both modules are
installed, there is no room to close the transmitter cover completely.

Number refers to Figure 28 above:

1 = Galvanic isolation module

The following numbers refer to Figure 29 above:

1 = Flat cable pins

2 = Screw terminals for signal line

3 = DIP switches to select the output mode and range

Galvanic Isolation of the Power Supply

If galvanic isolation of the power supply line from the output signals is
needed, PTU300 can be ordered with optional galvanic isolation module.
This module prevents harmful grounding loops.

NOTE

alvanic isolation module is not needed when using the AC power

Note also that these two modules are physically

0506-030

Figure 28 Galvanic Isolation Module

Third Analog Output

Figure 29 Third Analog Output

VAISALA ________________________________________________________________________ 53

0503-030

User's Guide _______________________________________________________________________

Only one of the switches 1
Only one of the switches 3

Installation and Wiring

1. Disconnect the power. In case the analog output module is installed
in the factory, continue with the step 4.

2. To attach the module, open the transmitter cover and fasten the
analog output module to the position for MODULE 1 with four
screws. Refer to Figure 2 on page 25.

3. Connect the flat cable between the analog output module and the
motherboard's connector for MODULE 1.

4. Take out the protective plug from the cable gland and thread the
wires.

5. Connect the wires to the screw terminals marked with Ch+ and
Ch- .

6. Select the current/voltage output by setting ON either of the
switches 1 or 2.

7. Select the range by setting ON one of the switches 3...7.

NOTE

... 2 can be ON at a time.

... 7 can be ON at a time.

0508-029

Figure 30 Third Analog Output Selection

8. Connect the power.

9. Select the quantity and scale the channel via the serial line or
display/keypad, see section Analog Output Quantities on page 128.
For testing the analog output, see section Analog Output Tests on
page 130. For fault indication setting, see section Analog Output
Fault Indication Setting on page 131.

54 ___________________________________________________________________ M210796EN-G

Chapter 3 ________________________________________________________________ Installation

NO

Normally open

C Common relay

NC Normally closed

Relay NOT activated:

C and NC outputs are closed, NO is open

Relay IS activated:

C and NO outputs are closed, NC is open.

Relays

PTU300 can be equipped with one configurable relay module. Each
module contains two configurable relays. See the contact ratings in
section Technical Specifications of Optional Modules on page 187.

Installation and Wiring

1. Disconnect the power and open the transmitter cover. In case the

relay-module is installed in the factory, continue with step 5.

2. To attach the module fasten the relay module to the bottom of the

housing with four screws. See the position in Figure 2 on page 25.

3. When the mains power is in use attach the grounding wire to the

grounding terminal.

4. Connect the flat cable between the relay module and the

MODULE 1 pins of the motherboard.

5. Take out the protective plug from the cable gland and thread the

relay wires.

NOTE

6. Connect the wires to the screw terminals: NO, C, and NC. Refer to

section Selecting the Activation State of the Relay.

7. Connect the power and close the cover.

Selecting the Activation State of the Relay

The middlemost C terminal and either one of the terminals NO/NC must
be connected. The polarity can be freely selected.

For instructions on how to operate the relay (for example, selecting
quantity for the relay output and setting the relay setpoints), see section
Operation of Relays on page 132.

VAISALA ________________________________________________________________________ 55

User's Guide _______________________________________________________________________

The following numbers refer to Figure 31 above:

1 = Indication led for the relay 1 or 3

2 = Relay test buttons

3 = Flat cable pins

4 = Indication led for relay 2 or 4

The relay module may contain dangerous voltages even if the
transmitter power has been disconnected. Before opening the transmitter
you must switch off
the relay

Do not connect the mains power to relay unit without grounding the
transmitter.

WARNING

WARNING

Figure 31 Relay Module

both the transmitter and the voltage connected to

terminals.

0503-037

56 ___________________________________________________________________ M210796EN-G

Chapter 3 ________________________________________________________________ Installation

RS
when RS

The following numbers refer to Figure 32 above:

1 = Flat cable pins

2 = Selection switches

3 = Screw terminals for wiring

The data lines on earlier versions of the RS
A and B instead of D1+ and D0
voltage compared to D0

When connecting the module, be prepared to swap the D1+ and D0
wires if you have a communication problem.

1

2

3

RS-422/485 Interf ace

The RS-422/485 interface enables communication between an RS-485
network and the PTU300 transmitter. The RS-485 interface is isolated
and offers a maximum communications rate of 115 200 bits/s. (For
maximum bus length of 1 km, use bit rate 19200 b/s or less.)

When selecting an RS-232 to RS-485 converter for the network, avoid
self-powered converters, as they do not necessarily support the needed
power consumption.

NOTE

-232 User Port on PTU300 main board cannot be used and connected

-485 module is connected. Service port operates normally.

1102-023

Figure 32 RS-485 Module

NOTE

-.

VAISALA ________________________________________________________________________ 57

-422/485 module are marked

-. When the line is idle, D1+ has positive

-

User's Guide _______________________________________________________________________

Screw Terminal

Data Line
(2-wire RS-485)

Data Line
(4-wire RS-422/485)

1

(not connected)

Rx D0-

2

(not connected)

Rx D1+

3

Common

Common

4

D0-

Tx D0-

5

D1+

Tx D1+

If you use the internal termination of the transmitter at the end of the RS
485 bus (instead of using
will block the bus operation.

Installation and Wiring

1. Disconnect the power. In case the RS-422/485 module is installed
in the factory, continue with the item 4.

2. To attach the module, open the transmitter cover and fasten the
RS-422/485 module to the bottom of the housing with four screws.

3. Connect the flat cable between the RS-422/485 module and the
motherboard's pins MODULE1 (Communications).

4. Pull the network wirings through the cable gland.

5. Connect the twisted pair wires (1 or 2 pairs) to the screw terminals
as presented in Table 9 below:

Table 9 Connecting the Twisted Pair Wires to the Screw

Terminals

NOTE

To avoid problems in the RS-422/485 network, the Common

terminal should be wired to the corresponding terminals of the
other devices.

6. If you use RS-422 or RS-485 to connect just one PTU300 to a
master computer, enable the internal termination of PTU300 by
switching switches 1 and 2 ON. Make sure that the master's end of
the line is also terminated (by using master's internal termination or
with a separate terminator).

If you are connecting many transmitters to the same RS-485 bus,
make sure that switches 1 and 2 are OFF and terminate the bus with
separate terminators at both ends. This allows removing any
transmitter without blocking the bus operation.

-

separate terminators) removing that transmitter

7. Use the bus type (4-wire/2-wire) to select the selection switch 3.

In 4-wire mode RS-485 master sends data to the PTU300 through
terminals Rx D1+ and Rx D0- and receives data from PTU300
through terminals Tx D1+ and Tx D0-.

58 ___________________________________________________________________ M210796EN-G

Chapter 3 ________________________________________________________________ Installation

RS-485 master

Data

PTU300

Tx D1+

→

Rx D1+

Tx D0-

→

Rx D0-

Rx D1+

←

Tx D1+

Rx D0-

←

Tx D0-

Stub

Termination Termination

Termination Termination

Twisted pair

120R

120R

120R

120R

Twisted pair

Stub

Stub

Baud > 19.2K Stub < 10ft, 3m
Baud >112K Stub < 1ft, 0.3m

Rx D0­Rx D1+
Common
Tx D0­Tx D1+

Switch
Te rm o ff
Te rm o ff
2/4 wire on
RS422 off

Tx D0­Tx D1+
Common
Rx D0­Rx D1+

Switch
Te rm o ff
Te rm o ff
2/4 wire on
RS422 off

Tx D0­Tx D1+
Common
Rx D0­Rx D1+

RS485-1

RS485-1

Address MM

Address NN

RS485 bus master

Junction

box

Junction

box

Junction

box

Common

line

Common

line

1102-028

Figure 33 4-Wire RS-485 Bus
Table 10 4-Wire (Switch 3: On)

VAISALA ________________________________________________________________________ 59

User's Guide _______________________________________________________________________

RS-485 master

Data

PTU300

D1+

↔

D1+

D0- ↔ D0-

Termination

Termination

Junction

box

Junction

box

Junction

box

120R
D0­D1+
Common

Switch
Term off
Term off
2/4 wire off
RS422 off

Stub

Stub

Stub

RS485-1

RS485-1

RS485 bus master

Twisted pair Common line

Address NN

Address MM

Common
D0­D1+

Switch
Term off
Term off
2/4 wire off
RS422 off

Common
D0­D1+

120R

Twisted pair Common line

60 ___________________________________________________________________ M210796EN-G

Figure 34 2-Wire RS-485 Bus
Table 11 2-Wire (Switch 3: Off)

8. When operating in communication mode RS-422, set both switches
3 and 4 to ON position (4-wire wiring is required for RS-422
mode).

9. Connect the power and close the cover.

1102-027

Chapter 3 ________________________________________________________________ Installation

The LAN interface is designed to be used
environments (trusted corporate LAN or VPN
internet). Avoid connecting the transmitter directly to a public network
because the device can be attacked by a malicious user through the
network.

1 =

Flat cable connector

2 =

RJ45 connector with
indicator LEDs for
link and activity

LAN Interface

The optional LAN interface enables an Ethernet connection to the
transmitter. The user can establish a virtual terminal session using a
Telnet client program such as PuTTY or by using Modbus TCP protocol.
When the LAN interface is in use, serial communication using the RS­232 User Port is disabled.

The LAN interface module must be installed at the factory (when
ordering the transmitter), or by a Vaisala Service Center. Once installed,
the module is automatically used by the transmitter. The physical
connection to the network is made to the RJ45 connector on the LAN
interface module, using a standard twisted pair Ethernet cable
(10/100Base-T). Transmitters with the optional LAN interface are
delivered pre-installed with a suitable cable and cable gland.

The LAN interface can use both static and dynamic network settings. If
the interface is configured to use dynamic settings, the network where the
LAN interface is connected must have a DHCP server that provides the
settings.

CAUTION

The network configuration can be done using the optional display and
keypad, or by using the service port. For instructions, see section LAN
Communication on page 84. The LAN interface also provides a web
configuration interf ace , whi ch you can acc ess b y entering the IP address
of the LAN interface in the address field of a web browser. See section
Web Configuration for LAN and WLAN on page 90.

in trusted network

-based connection over

0709-003

Figure 35 LAN Interface Module

VAISALA ________________________________________________________________________ 61

User's Guide _______________________________________________________________________

1 =

Flat cable connector

2 =

Connector for antenna
cable (connected to
transmitter cover)

WLAN Interface

The optional WLAN interface enables a wireless Ethernet connection
(IEEE 802.11b) to the transmitter. The user can establish a virtual
terminal session using a Telnet client program such as PuTTY or by
using Modbus TCP protocol. When the WLAN interface is in use, serial
communication using the RS-232 User Port is disabled.

The interface supports Wired Equivalent Privacy (WEP) and Wi-Fi
Protected Access (WPA, WPA2). For WEP, 64 and 128 bit encryption is
supported, with open system or shared key authentication. WPA is used
in the Pre-Shared Key (PSK) mode, with either TKIP or CCMP (also
known as AES) encryption.

Similarly to the LAN interface, the WLAN interface can use both static
and dynamic network settings. If the interface is configured to use
dynamic settings, the network where the WLAN interface is connected
must have a DHCP server that provides the settings.

The WLAN interface also provides a web configuration interface, which
you can access by entering the IP address of the WLAN interface in the
address field of a web browser. See section Web Configuration for LAN
and WLAN on page 90.

CAUTION

NOTE

62 ___________________________________________________________________ M210796EN-G

0802-103

Figure 36 WLAN Interface Module

The WLAN interface is designed to be used in trusted network
environments (trusted corporate LAN or VPN-based connection over
internet). Avoid connecting the transmitter directly to a public network
because the device can be attacked by a malicious user through the
network.

The default country setting for the WLAN interface is United States,
which limits the operation to WLAN channels 1 ... 11. To enable
additional channels (12 ... 14), you can change the country setting using
the web configuration interface.

Chapter 3 ________________________________________________________________ Installation

The WLAN interface is not recommended for use with the
probe model
probe is designed to be used with the WLAN interface.

Observation Period

Period for Trend/Max/Min
Calculations (Resolution)

20 minutes

10 seconds

3 hours

90 seconds

1 day

12 minutes

10 days

2 hours

2 months

12 hours

1 year

3 days

4 years

12 days

NOTE

PTU301 fixed

(for wall-mounted applications). The PTU301 short cable

Attaching the WLAN Antenna

The WLAN interface module must be installed at the factory (when
ordering the transmitter), or by a Vaisala Service Center. Before taking
the transmitter into use, you must attach the antenna of the WLAN
interface into the RP-SMA connector on the transmitter cover. The
location of the antenna is shown in Figure 80 on page 192.

Data Logger Module

The optional data logger module extends the data storage for the
measurement data. When the data logger is present, this storage is
automatically used by the transmitter. The stored data can be browsed
using the optional display module, and accessed through the serial
connections. See sections Graphic History on page 70 and Data
Recording on page 123.

The data logger module contains non-volatile flash memory providing 4
years 5 months of storage for 4 parameters at a 10 second sampling
interval. When the memory is full, the data recording will not stop.
Instead, the oldest data is overwritten. For each parameter and
observation period, the module stores the minimum and maximum values
during the interval, as well a data trend value that is averaged from
samples taken during the interval (see Table 12 below).

Table 12 Observartion Periods and Resolution

The quantities that are logged are the same that have been selected for
measurement using the display/keypad or the serial line. When taking the
transmitter into use, verify that the desired quantities are selected. If you
change the quantities later, the transmitter will start logging the new
quantities, and stop logging the quantities that are no longer selected.
Changing the quantities does not delete any measurement data that is

VAISALA ________________________________________________________________________ 63

User's Guide _______________________________________________________________________

1 =

Flat cable pins

2 =

Battery

already in memory. However, the data of any removed quantity cannot be
accessed unless the quantity is re-activated first.

The data logger module has a real time clock with a battery back-up. The
clock has been set to the Coordinated Universal Time (UTC) at the
factory, and its time cannot be set by the user. The data that is stored in
the logger's memory is timestamped using the logger's clock.

When date and time are set on the transmitter, they are stored to the
transmitter's memory as an offset from the time on the logger's clock.
When browsing the stored data, the time offset is applied to the
timestamps shown in the graphical history, and data outputted from the
serial port. The timestamps in the data logger's memory remain as they
were originally stored.

You can compensate for the clock drift (less than ±2 min/year) by setting
the time on the transmitter. This updates the time offset used on the
display and the serial port. You can set the time by using the
keypad/display or the serial commands.

0706-068

Figure 37 Data Logger Module

After a reset or a power up, it will usually take at least 10 seconds before
the data logger module is initialized. The instrument will not start up
before the data logger module is ready.

The indicator LED on the module will blink green during normal
operation. If the LED is lit in red color, there is a problem with the
module. The transmitter will also indicate the problem by activating the
"Internal error on add-on module" error. If the module is not operating
correctly, the transmitter must be sent to Vaisala for maintenance.

The data logger module must be installed at the factory (when ordering
the transmitter), or by a Vaisala Service Center. Once installed, the
module is automatically used by the transmitter. When the module
requires a new battery, the transmitter must be sent to Vaisala for
maintenance.

64 ___________________________________________________________________ M210796EN-G

Chapter 4 _________________________________________________________________ Operation

CHAPTER 4

OPERATION

This chapter contains information that is needed to operate this product.

Getting Started

Within a few seconds after power-up the led on the cover of the
transmitter is lit continuously indicating normal operation. If the data
logger module is installed, the startup may take up to 18 seconds. When
using the optional display and turning the transmitter on the first time, the
language selection menu window opens. Select the language with the
▼▲ arrow buttons and press the SELECT button (the left-hand
button).

The pressure has an effect on humidity calculations and accuracy.
Therefore, accurate calculations can be achieved only when the ambient
pressure is taken into consideration. PTU300 uses measured pressure for
compensation by default.

See section Pressure Compensation Settings on page 109 for instructions
on how to set the pressure.

VAISALA ________________________________________________________________________ 65

User's Guide _______________________________________________________________________

The following numbers refer to Figure 38 above:

1 = INFO shortcut key; see section Information Display on
page 72.

2 = GRAPH shortcut key; see section Graphic History on page 70.

3 = Quantities selected for display

From any view, even in the absence of an
press on the right
display.

Display/Keypad (Optional)

The optional display and keypad combination enables shortcuts for
viewing current settings and status of the device, current measurement
values, and graph of the recent measurement history. Additionally the
device has user friendly, visible menu system for adjusting settings and
turning functions on or off.

Basic Display

Display shows you the measurement values of the selected quantities in
the selected units. You can select 1 ... 4 quantities for the basic display
(see section Changing Quantities and Units on page 101).

NOTE

0601-014

Figure 38 Basic Display

-hand function button takes you directly to the basic

EXIT button, a four-second

66 ___________________________________________________________________ M210796EN-G

Chapter 4 _________________________________________________________________ Operation

The following numbers refer to Figure 39 above:

1 = Tendency: Increasing/decreasing graph symbol with the code
number (for more information, see Figure 40 on page 68)

2 = P3h symbol

3 = Trend (middlemost numeric value)

Pressure 3h Trend and Tendency Reading

Using Basic Display

0604-056

Figure 39 Basic Display with P

Trend and Tendency

3H

Pressure tendency graphics and codes

The characteristic symbols of pressure tendency during the three hours
preceding the time of observation are described in Figure 40 on page 68.

Source: The World Meteorological Organization (WMO) publication
Manual on Codes Vol. I.1, International Codes, Part A - Alphanumerical
Codes, 1995 Edition, WMO - No. 306. Section C, Code Table 0200: a.

VAISALA ________________________________________________________________________ 67

User's Guide _______________________________________________________________________

The following numbers refer to Figure 40 on page 68:

0 = Increasing, then decreasing; atmospheric pressure the same or
higher than three hours ago

1 = Increasing, then steady; or increasing, then increasing more
slowly; atmospheric pressure now higher than three hours ago

2 = Increasing (steadily or unsteadily); atmospheric pressure now
higher than three hours ago

3 = Decreasing or steady, then increasing; or increasing then
increasing more rapidly; atmospheric pressure now higher than
three hours ago

4 = Steady; atmospheric pressure the same as three hours ago

5 = Decreasing, then increasing; atmospheric pressure the same or
lower than three hours ago

6 = Decreasing, then steady; or decreasing, then decreasing more
slowly; atmospheric pressure now lower than three hours ago

7 = Decreasing (steadily or unsteadily); atmospheric pressure now
lower than three hours ago

8 = Steady or increasing, then decreasing; or decreasing then
decreasing more rapidly; atmospheric pressure now lower than
three hours ago

0604-055

Figure 40 Pressure Tendency Description

68 ___________________________________________________________________ M210796EN-G

Chapter 4 _________________________________________________________________ Operation

When the P

tendency is chosen as a display quantity, the PTU300 logs

actual measured pressure, instead of trend or

Using Serial Line

Pressure 3h trend and tendency reading is also available through serial
line. Key in the lines below:

>form "P=" p "trend=" p3h "tend=" a3h #r#n
OK

>send
P= 1024.7trend= 0.8tend=1

The last line shows the values.
For more information on the Form command, see the section Changing

Quantities and Units, starting on page 101.

Missing Trend

The PTU300 series barometers output a code "*" when the pressure
tendency has not yet been calculated - that is, less than three hours have
elapsed since the power-up of the barometer. The absence of the pressure
trend is indicated in a similar manner, too.

NOTE

3H

tendency value.

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Observation Period

Period for Trend/Max/Min
Calculations (Resolution)

20 minutes

10 seconds

3 hours

90 seconds

1 day

12 minutes

10 days

2 hours

2 months

12 hours

1 year

3 days

4 year*

12 days

Graphic History

The graphical display shows the data trend or min/max graph of the
selected quantities, one at a time. The graph is updated automatically
while measuring.

0706-052

Figure 41 Graphical Display
Trend graph: Shows you a curve of average values. Each value is a

calculated average over a period. See Table 13 below.
Max/min graph: Shows you the minimum and maximum values in a

form of curve. Each point shows the absolute minimum and maximum
observed during the time period represented by the data point. See Table
13 below.

Table 13 Periods for Trend and Max/Min Calculations

* Shows the maximum logging period of the data logger module (available when data
logger module is installed)

Use the following functions in the graphical display:

- Press the NEXT button to change between the trend graph and

max/min graph for the quantities selected for display.

- Press the EXIT button to return to the basic display.

- Press the ▼▲ arrow buttons to zoom in and out in the graph window.

- Press the ◄► arrow buttons move the cursor (vertical bar) along the

time axis. The cursor mode allows you to observe individual
measuring points. The numerical value at the cursor position is shown
at the left upper corner. The right upper corner shows the time from
the present to the chosen moment (without the logger module), or the
date and time at the cursor position (when the logger module is
installed).

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Message

Interpretation

Power outage

Power failure (marked also with dashed
vertical line)

No data

Quantity has not been selected for the display

System error

General device or power supply problem

T meas. error

Temperature measurement/sensor failure

RH meas. error

Humidity measurement/sensor failure

P meas. error

Pressure measurement/sensor failure

Adj. mode active

Adjustment mode active (data recorded in the
adjustment mode is not displayed)

- If the optional data logger module is installed, you can scroll the

cursor off the screen to move to a new point on the time axis. The new
date will be displayed, and the cursor will be centered at the date
where the cursor scrolled off the screen.

0706-030

Figure 42 Graphical Display with Data Logger

If the data logger module is installed, you can move quickly on the time
axis: zoom out, move the cursor, and zoom back in.

The time that is shown below the graph is adjusted with the current time
offset of the transmitter. If you change the transmitter's date and time
setting, the displayed timestamps in the history graph change
accordingly. For an explanation of the effect of changing the date and
time manually, see section Data Logger Module on page 63.

Table 14 Graph Information Messages in Cursor Mode

A question mark after time indicates that at least one power failure
(dashed vertical line) has occurred after the chosen moment. In this case,
the exact time difference between the present and the cursor position is
not exactly known. If the data logger module is installed, the time is
known and the question marks are not present.

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User's Guide _______________________________________________________________________

Information Display

The information display contains current settings and status of the device.
You can open the display by pressing the left function button INFO in
the basic display. The following information will be shown:

- Current sensor operation (for example, chemical purge), if any, in

progress

- Present or past unacknowledged errors, if any

- Device identification; product name, version and serial number

- Adjustment information (the latest date, user made adjustments)

- Measuring settings

- Information on chemical purge settings (when applicable)

- Display Alarm settings

- Serial interface information

- Network settings and status of the LAN or WLAN interface

(when applicable)

- Analog output information

- Relay output information (when applicable)

0706-002

Figure 43 Device Information on Display

Proceed in the information views by pressing the MORE button
repeatedly until you get the desired information. You can also press the
left/right arrow buttons to browse through the information.

To exit the display, press the right function button OK.

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Chapter 4 _________________________________________________________________ Operation

Menus and Navigation

You can change settings and select functions in the menus.

1. Open the Main Menu by pressing any of the arrow buttons

▼▲◄► in the basic display mode.

2. Scroll the list upwards or downwards by pressing the up/down

arrow buttons ▼▲.You can select an option by highlighting it.

3. To open a submenu, press the right arrow button ►.

4. To return to the previous menu level, press the left arrow button ◄.

5. To return to the basic display directly, press the right function

button EXIT.

0706-028, 0706-053, 0802-040

Figure 44 Main Menu

Some menu items, such as Chemical Purge in the Measuring menu, are
only shown if supported by the transmitter and the installed options.

Changing the Language

1. Go back to the basic display by keeping the right-hand button

pressed for four seconds.

2. Open the Main Menu by pressing any of the ▼▲◄► buttons.

3. Scroll to the System menu option, and press the ► button. The

menu option is indicated with the wrench symbol.

4. Scroll to the Language menu option, and press the left-hand

button. The menu option is indicated with the flag symbol.

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User's Guide _______________________________________________________________________

5. Select the language with the ▼▲ buttons, and confirm the
selection by pressing the left-hand button.

6. Press the right-hand button to exit to the basic display.

Rounding Setting

Round off one decimal by using the Rounding function . The default
setting is rounding on. Rounding has no effect on quantities without
decimals.

1. Open the Main Menu by pressin g an y of the arrow buttons.

2. Select Display and press the right arrow button.

3. Select Rounding and press the ON/OFF key.

4. Press the EXIT key to return to the basic display.

Display Backlight Setting

As a default the display backlight is always on. In the automatic mode
the backlight stays on for 30 seconds from the last press of any key.
When pressing any key, the light turns on again.

1. Open the Main Menu by pressing any of the arrow buttons.

2. Select Display, press the right arrow button.

3. Select Backlight, press the CHANGE key.

4. Select On/Off/Automatic, press the SELECT key.

5. Press the EXIT key to return to the basic display.

Display Contrast Sett ing

Display contrast is automatically adjusted based on the ambient
temperature. However, depending on the installation location and
viewing direction, it may be necessary to fine-tune the contrast manually.

Using Display/Keypad

1. Open the Main Menu by pressing any of the arrow buttons.

2. Select Display, press the right arrow button.

3. Select Contrast, press the ADJUST key.

4. Adjust the contrast by pressing the left/right arrow buttons.

5. Press the OK key and then EXIT to return to the basic display

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Chapter 4 _________________________________________________________________ Operation

where

xxx

=

Contrast value for display. Recommended range -9 ... 9,
default 0. Negative values make screen lighter, positive
values make it darker.

Using Serial Line

Use the serial line command CON to view or set the display contrast.
CON [xxx]<cr>

Example (view current contrast setting):

>con
Contrast : 0
>

Example (set contrast to 5):

>con 5
Contrast : 5

>

Keypad Lock (Keyguard)

This function locks the keypad and prevents unintentional key presses.

1. Press and hold down the left function button for 4 seconds to lock

the keypad (at any display).

2. To unlock the keypad, press and hold down the same key for 4

seconds.

Menu PIN Lock

You can prevent unauthorized changes of the device settings by
activating the menu PIN lock. When this function is activated, the basic
display, graphical view, and device information displays are available,
but access to the menus is locked. The key symbol indicates the
activation of this feature.

1. Open the Main Menu by pressing any of the arrow buttons.

2. Select System, press the right arrow button.

3. Select Menu PIN, press the ON key.

4. Enter a PIN code by using the up/down arrow buttons. Move to the

next digit by pressing the left/right arrow buttons. Press the OK
key to confirm the setting. Now the PIN lock is on and a key
symbol is shown in a display.

5. Press the EXIT key to return to the basic display. Returning to the

menu is possible only by entering the correct PIN code.

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User's Guide _______________________________________________________________________

You can also disable the keypad completely with serial command

LOC

118

When you want to turn off the PIN lock, open the menu by entering the
PIN code and select System, Menu PIN, press the OFF key.

In case you have forgotten the PIN code, open the transmitter cover and
press the ADJ button once. Wait for a few seconds and the Adjustment
menu opens. Select Clear menu PIN, press the CLEAR key.

NOTE

K. See section Locking Menu/Keypad using Serial Line on page

.

Factory Settings

Use the display/keypad to restore the factory settings. This operation
does not affect the adjustments. Only settings available in the menus are
restored.

1. Press any of the arrow buttons to open the Main Menu.

2. Select System, press the right arrow button.

3. Select Factory settings and press the REVERT key to confirm
your selection. Press the YES key to reset all settings to the factory
defaults.

In case you change your mind and want to exit the menu without making
any changes, press the NO key.

See section General Settings on page 101 for a description of the other
menu options.

Configuring Display Ala rm s

The Display Alarm feature provides two independently configurable
alarms for transmitters with the display/keypad option. Each alarm tracks
a selected quantity, with freely configurable limit values. Each alarm also
has a configurable hysteresis value to prevent unnecessary triggering
when the measurement fluctuates around an alarm limit. The alarms can
be configured for any quantity supported by the transmitter. The
configuration of the Display Alarms can only be done using the
display/keypad option.

You can have the alarm activate inside or outside the specified range by
setting the limits correctly:

- To have the alarm activate when the measured quantity is outside the

specified range, set the Act. above limit higher than the Act. below
limit.

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Chapter 4 _________________________________________________________________ Operation

- To have the alarm activate when the measured quantity is inside the

range, set the Act. above limit lower than the Act. below limit.

The alarm limits are shown on the graph display as thicker dotted lines.
When a display alarm is activated, the automatic scaling of the graph
display always keeps the limits in view.

1102-012

Figure 45 Alarm Limits Shown on Graph Screen

When an alarm is activated, an alarm note is displayed on the display,
and the lights of the display will blink. If the data logger module is
installed, the alarm note includes the time and date of the alarm.

0802-041

Figure 46 Display Alarm Active

Multiple alarms can be active at the same time; the alarm that was
triggered first will be shown on the display. The next active alarm is
revealed when the currently shown alarm is acknowledged by pressing
the OK button.

Activated alarms are only shown on the screen; there are no alarm
messages output to the serial line. After an alarm has been
acknowledged, you must refer to the data graphs to see when the
measured quantities have exceeded the limits. You may use the optional
relay outputs as alarm outputs by configuring them separately; see
section Setting Relay Outputs on page 137.

Using Display/Keypad

1. Enter the Main Menu by pressing an arrow button on the keypad.

2. Use the arrow keys to select Display, followed by Alarms, to open

the Display Alarms menu. The Display Alarms menu shows the
currently enabled and disabled alarms.

VAISALA ________________________________________________________________________ 77

User's Guide _______________________________________________________________________

Changes you do on the alarm editing page will take effect immediately,
and may cause an alarm to appear on the screen.

0802-069

Figure 47 Display Alarms

3. Use the arrow keys to select an alarm to configure. The alarm
editing page opens.

NOTE

4. To select a quantity for the alarm, press the CHANGE button and
select the quantity from the list.

5. To modify or remove the alarm limit values, move the selection
over the Act. above or Act. below field and press the SET button.
You will be prompted to Modify or Remove the value.

0802-070

Figure 48 Modifying an Alarm Limit

When modifying the value, use the arrow up and down buttons to
change the value under the cursor. Left and right arrow buttons
move the cursor. Select the OK button to accept the modified
value, or Cancel to undo the modification.

6. Set a suitable Hysteresis value to prevent the alarm from being
triggered unnecessarily by small measurement changes that pass
the alarm limit repeatedly.

7. Set or clear the Alarm enable checkbox to enable or disable the
alarm.

8. Press the EXIT button to leave the alarm configuration screen and
return to the basic view.

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Chapter 4 _________________________________________________________________ Operation

where

quantity1

=

Quantity for display alarm 1. You can set any quantity
available on your transmitter; see
addition to quantities, you can als

FAULT
ONLINE
measurement output (for example, chemical purge).

quantity2

=

Quantity for display alarm 2. Options are the same as for
quantity1.

Name

Description

above

If specified, the alarm goes off when the quantity value rises above

Cannot be set for fault and online alarms.

below

If specified, the alarm goes off when the quantity value decreases

Cannot be set for fault and online alarms.

hyst

Distance from setpoint amount of extra retractment needed in order
Cannot be set for fault and online alarms.

enabl

Enable (ON) or disable (OFF) the display alarm.

Using Serial Line

Use the serial line command ALSEL to view or set the display alarms.
ALSEL [quantity1 quantity2]<cr>

tables on page 22. In

o select the following:

– Alarm for device errors

– Alarm for sensor operations that freeze the

Example (view current display alarm settings):

>alsel ?
Al1 P above: - ?
Al1 P below: 1013.00 hPa ?
Al1 P hyst : 10.00 hPa ?
Al1 P enabl: ON ?
Al2 T above: 40.00 'C ?
Al2 T below: - ?
Al2 T hyst : 1.00 'C ?
Al2 T enabl: OFF ?
Warning! One or more alarms disabled.
>

Table 15 ALSEL Parameters

the exact value of this setpoint. However, if above < below, the
alarm goes off at (above + hyst) and (below – hyst) instead.

below the exact value of this setpoint. However, if above < below,
the alarm goes off at (above + hyst) and (below – hyst) instead.

to regenerate alarm on the next crossing of the setpoint.

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User's Guide _______________________________________________________________________

Example (set Tdf and T as display alarm quantities and configure the
alarms as prompted):

>alsel tdf t
Al1 Tdf above: 80.00 'C ? 10
Al1 Tdf below: - ?
Al1 Tdf hyst : 1.00 'C ?
Al1 Tdf enabl: ON ?
Al2 T above: 40.00 'C ? ­Al2 T below: - ? 0
Al2 T hyst : 1.00 'C ?
Al2 T enabl: OFF ? on
>

MI70 Link Program for Data Handling

MI70 Link is a support program that enables you to handle the
measurement data of your Vaisala transmitter using a Windows PC.
Using the MI70 Link you can, for example:

- Monitor the transmitter’s measurement readings directly using the

real-time window function.

- Transfer recorded data from the main transmitter memory in numeric

or graphical format, for further use in a spreadsheet program (such as
Microsoft Excel) or virtually any other application. Note that the
maximum amount of data points that can be downloaded in one
transfer is 65000.

To use the MI70 Link program, you must connect your Windows PC to
the service port of the transmitter with a serial or USB cable. The MI70
Link program, and the optional connection cables, are available from
Vaisala. See section Spare Parts and Accessories on page 189.

Follow the steps below to connect your transmitter to the MI70 Link
program using the serial interface:

1. Connect your PC to the service port of the transmitter. Refer to
section Service Port Connection on page 82.

2. Check that the PTU300 is powered.

3. Start the MI70 Link program.

4. Start using the program. There is usually no need to select a COM
port manually, the MI70 Link software can detect it automatically.

NOTE

For instructions on using the MI70 Link, see the program’s online help.

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Chapter 4 _________________________________________________________________ Operation

The following numbers refer to Figure 49 above:

1 = Service port connector

2 = User port terminals

Parameter

Value

Bits per second

4800

Parity

Even

Data bits

7

Stop bits

1

Flow control

None

Serial Line Communication

Connect the serial interface by using either the user port or the service
port.

For permanent interfacing to host system, use the user port. You can
change the serial settings and operate in RUN, STOP, SEND, POLL, and
MODBUS modes.

For temporary connections use the service port. Service port is always
available with fixed serial settings.

0605-039

Figure 49 Service Port Connector and User Port Terminal on

Motherboard

User Port Connection

Use suitable serial cable between the user port RxD, GND and TxD
screw terminals and the PC serial port, see Figure 50 on page 82.

Table 16 Default Serial Communication Settings for the User

Port

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User's Guide _______________________________________________________________________

RS
(LAN, WLAN, or RS

1

2

3

4

5

6

7

8

9

+

–
RxD
GND
TxD
Ch1+
Ch1–
Ch2+
Ch2–

ANALOG OUTPUTS USER PORT POWER

RS-232 10…36 V=

24 V~

IOIOI

0506-033

Figure 50 Connection Example between PC Serial Port and User

Port

Connections to pins 4,6,7 and 8 on PC serial port are required only if you
are using software requiring hardware handshaking.

User Port Operating Modes

NOTE

When the transmitter is powered up, it will behave according to its
configured operating mode:

- In STOP mode, the transmitter outputs the software version and the
command prompt (if echo is on).

- In RUN mode a measurement output starts immediately.

- In SEND mode one measurement message is printed and command
prompt is displayed (if echo is on).

- In POLL or MODBUS mode, the transmitter does not output anything
after power-up.

For a description of the modes, see section SMODE on page 121.

-232 User Port cannot be used when a communication module

-422/485 interface) has been installed.

Service Port Connection

Connection Cables

82 ___________________________________________________________________ M210796EN-G

To connect to the service port, you need a suitable cable with an RJ45
connector. Depending on the connections of your PC, you can either use
the Serial Connection Cable (optional accessory 19446ZZ) or the
USB-RJ45 Serial Connection Cable (optional accessory 219685). The
USB cable enables you to connect the transmitter to a PC via a standard
type A USB port. Note that the USB cable does not enable high speed

Chapter 4 _________________________________________________________________ Operation

Parameter

Value

Bauds

19200

Parity

None

Data bits

8

Stop bits

1

Flow control

None

data transfer, since the bit rate is limited by the serial interface of the
service port.

Installing the Driver f or t he USB Cable

Before taking the USB cable into use, you must install the provided USB
driver on your PC. When installing the driver, you must acknowledge
any security prompts that may appear.

1. Check that the USB cable is not connected. Disconnect the cable if
you have already connected it.

2. Insert the media that came with the cable, or download the latest
driver from www.vaisala.com.

3. Execute the USB driver installation program (setup.exe), and
accept the installation defaults.

4. After the driver has been installed, connect the USB service cable
to a USB port on your PC. Windows will detect the new device,
and use the driver automatically.

5. The installation has reserved a COM port for the cable. Verify the
port number, and the status of the cable, using the Vaisala USB
Instrument Finder program that has been installed in the
Windows Start menu.

Windows will recognize each individual cable as a different device, and
reserve a new COM port. Remember to use the correct port in the
settings of your terminal program.

Using the Service Port

1. Open the screws on the transmitter cover, and open the cover.

2. Connect the desired cable (serial interface cable or USB cable) to
your PC and the service port connector on the transmitter. For the
location of the service port, refer to Figure 49 on page 81.

3. Open a terminal program and set the communication settings as
follows:

Table 17 Communication Settings for the Service Port

For a detailed explanation of using a terminal program, see section

Terminal Program Settings on page 91.

4. Power-up the PTU300.

VAISALA ________________________________________________________________________ 83

User's Guide _______________________________________________________________________

Parameter

Description

Automatic configuration

If enabled, the transmitter will retrieve its network

are used instead.

Web configuration

If enabled, the settings of the interface can be

address of the transmitter.

IP Address

The four part network ID of the transmitter. Must

Example value: 192.168.0.222

Netmask

Used together with the IP address to determine

A common netmask is 255.255.255.0

Gateway

IP address of the server that enables the

Example value: 192.168.0.1

MAC

The MAC address is the unique hardware address
changed.

LAN Communication

To enable LAN communication, a LAN or WLAN interface must be
physically connected to the network, and the networking settings must be
suitable for your network. For a description of interfaces, see sections
LAN Interface on page 61 and WLAN Interface on page 62.

The LAN and WLAN interfaces both operate by accessing the serial
interface (User Port) of the transmitter. All commands and protocols that
are available using the serial interface are available through the LAN and
WLAN interfaces; refer to section List of Serial Commands on page 94.
For instructions on how to connect using a terminal program, see section
Terminal Program Settings on page 91.

IP Configuration

The IP settings of the LAN and WLAN interfaces are described in Table

18. The current settings can be viewed on the serial line or using the
device information display; see section Information Display on page 72.

Table 18 IP Settings for the LAN and WLAN Interfaces

(DHCP)

settings (including the IP Address) from a server
in the network. If disabled, static network settings

changed using a web browser. The configuration
page can be accessed by browsing to the IP

be set manually if automatic configuration is not
used.

which network the transmitter is a part of. Must be
set manually if automatic configuration is not
used.

transmitter to access other networks. Must be set
manually if automatic configuration is not used.

84 ___________________________________________________________________ M210796EN-G

of the LAN or WLAN interface. Cannot be

Chapter 4 _________________________________________________________________ Operation

Using Display/Keypad

You can configure the IP settings of the LAN and WLAN interfaces
using the display/keypad as follows:

1. Press any of the arrow buttons to open the Main Menu.

2. Press the ► arrow button to select Interfaces.

3. Press the ► arrow button to select Network settings. There will be
a delay as the transmitter refreshes the network information.

4. You are now in the Network Interface menu. Selecting the IP
configuration option opens the IP configuration menu.

1102-015

Figure 51 Network Interface Menu

The Network Interface menu also allows you to configure the

Communication Protocol, enable or disable the Web
configuration option, or Disconnect all users that are currently

accessing the LAN or WLAN interface.

5. In the IP configuration menu, select Automatic configuration
(DHCP), or enter the IP address, Netmask and Gateway
manually. If automatic configuration is enabled, manual
configuration cannot be done.

0709-004

Figure 52 IP Configuration Menu

To enter a value manually, use the ▲▼ arrow buttons to select the

parameter to change, and press CHANGE. A cursor will appear in

the first digit. Move the cursor using the ◄► arrow buttons, and

change the value under the cursor using the ▲▼ arrow buttons.
Confirm the selection by pressing OK.

6. After configuring the desired parameters, press EXIT to apply the
changes and return to the basic display.

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User's Guide _______________________________________________________________________

where

REFRESH

=

Updates the network information and displays it.

DISCONNECT

=

Disconnects all current sessions.

DHCP

=

ON or OFF. Enables or disables the automatic IP
configuration.

WEB

=

ON or OFF. Enables or disables the Web
Configuration page.

IP = The four part network ID of the transmitter. Must
be set manually if automatic configuration is not
used.

SUBNET

=

Used together with the IP address to determine
which network the transmit
set manually if automatic configuration is not used.

GATEWAY

=

IP address of the server that enables the transmitter
to access other networks. Must be set manually if
automatic configuration is not used.

Using Serial Line

Use the serial line command NET to view or set the network settings for
the LAN and WLAN interfaces. You can also refresh the network
information or disconnect all active connections.

NET [REFRESH] [DISCONNECT] [DHCP WEB] [DHCP IP SUBNET
GATEWAY WEB]<cr>

Examples:

>net refresh
OK
DHCP : OFF
IP address : 192.168.0.101
Subnet mask : 255.255.255.0
Default gateway: 192.168.0.1
Web config. : OFF
MAC address : 00:40:9d:2c:d2:05
Status : Not connected
>

>net on off
DHCP : ON
IP address : 192.168.0.104
Subnet mask : 255.255.255.0
Default gateway: 192.168.0.1
Web config. : OFF
MAC address : 00:40:9d:2c:d2:05
Status : Connected
OK
>

ter is a part of. Must be

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Chapter 4 _________________________________________________________________ Operation

Parameter

Description

SSID

The service set identifier (that is, network name) of the
wireless network to connect to. 1 … 32 characters.

Security type

The security type of the wireless network. The options

see below.

Security key

The encryption key or passphrase that is used with an
encrypted network.

>net off 192.168.0.101 255.255.255.0 192.168.0.1 off
DHCP : OFF
IP address : 192.168.0.101
Subnet mask : 255.255.255.0
Default gateway: 192.168.0.1
Web config. : OFF
MAC address : 00:40:9d:2c:d2:05
Status : Not connected
OK
>

Wireless LAN Co nfiguration

The settings of the WLAN interface are described in Table 19. The
current settings can be viewed on the serial line or using the device
information display; see section Information Display on page 72.

- CCMP encryption is called AES in some networking products.

- The WLAN interface supports both WPA and WPA2 (also known as

802.11i) security when either WPA-PSK mode is selected.

- If your WLAN network is using some other security method than

listed below, you must set up a temporary WLAN network with any of
these settings and then use the web configuration to set WLAN
security settings for the actual network. See section Web
Configuration for LAN and WLAN on page 90.

Table 19 Wireless LAN Settings

are:
OPEN

OPEN/WEP
WPA-PSK/TKIP
WPA-PSK/CCMP

All other choices except OPEN require a security key;

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Using Display/Keypad

You can configure the Wireless LAN settings using the display/keypad
as follows:

1. Press any of the arrow buttons to open the Main Menu.

2. Press the ► arrow button to select Interfaces.

3. Press the ► arrow button to select Network settings. There will be

a delay as the transmitter refreshes the network information.

4. Press the ► arrow button to select Wireless LAN settings.

0802-111

Figure 53 Wireless LAN Settings

5. The Name entry on the page shows the SSID of the currently
selected wireless network. To change the SSID, press the SET
button. Use the ▲▼ arrow buttons to change the character under

the cursor, and ◄► arrow buttons to more the cursor. Press the

OK button when done.

0802-110

Figure 54 Entering Network SSID

6. To change the currently selected Network type, select the Type
entry and press the CHANGE button. Select the new type from the
list and press the SELECT button.

0802-112

Figure 55 Selecting the Wireless Network Type

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Chapter 4 _________________________________________________________________ Operation

where

SSID

=

Network name in 1 … 32 characters

TYPE

=

Security type of the wireless network. The options
are:

OPEN
OPEN/WEP
WPA
WPA-PSK/CCMP

7. If you have selected an encrypted network type (WEP or WPA),

you must enter the security key to be used. Select the
Key/passphrase entry and press the SET button. Enter the key in
the same way as the SSID, and press the OK button. With the WEP
encryption you must enter the encryption key in hexadecimal
(10 hexdecimals for 64-bit encryption or 26 hexadecimals for
128-bit encryption). A WPA key must be 8 … 63 ASCII
characters.

8. After setting the wireless network parameters, press the EXIT

button in the Wireless LAN Settings menu. You will be asked to
confirm the new settings. Note that when new settings are saved,
all currently active WLAN connections are disconnected.

Using Serial Line

Use the serial line command WLAN to view or set the wireless network
settings. If you set an encrypted network type, you will be asked to enter
the security key. With the WEP encryption you must enter the encryption
key in hexadecimal (10 hexdecimals for 64-bit encryption or 26
hexadecimals for 128-bit encryption) or with plain ASCII characters (5
characters for 64-bit encryption or 13 characters for 128-bit encryption).
A WPA key must be 8 … 63 ASCII characters.

WLAN [SSID TYPE]<cr>

-PSK/TKIP

Examples:

>wlan ?
Network SSID : WLAN-AP
Type : OPEN
>

>wlan accesspoint wpa-psk/tkip
Network SSID : accesspoint
Type : WPA-PSK/TKIP
WPA-PSK phrase ? thequickbrownfox
Save changes (Y/N) ? y
OK
>

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Communication Protocol

When a Telnet connection is established via the LAN or WLAN
interface, the session has the same communication mode, run interval,
poll address and echo settings as the serial port (user port) session would
have.

These settings can be changed using the display/keypad, using the serial
line (user port or service port), or on-the-fly during the Telnet session.

The display menu path to the Communication Protocol settings is:

Main Menu ► Interfaces ► Network Interface ► Communication
Protocol.

The commands for changing the settings are SMODE, INTV, ADDR,
and ECHO.

Web Configuration for LAN and WLAN

The LAN and WLAN interfaces both have a web configuration page that
is accessible using a browser. If you have not disabled the page from the
network settings, you can access it with a web browser at the IP address
of the interface. You can check the currently assigned IP address of the
interface from the device information screens (see Device Information on
page 115), or from the serial line by issuing the net ? command.

When accessing the web configuration page, you must first log in.

Username: user
Password: vaisala

The web configuration page provides similar network configuration
options as the serial line and the display/keypad. It also has additional
options for advanced users. For example, there are more options for
securing the wireless network.

If these additional options are used, they will appear as custom
configurations when viewed from the serial line or the display/keypad.

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P
the transmitter is configured to use the
can always use PuTTY to access the transmitter through the Service

1102-017

Figure 56 Web Configuration Interface for WLAN

Terminal Program Settings

NOTE

The instructions below describe how to connect to the PTU300 using the
PuTTY terminal application for Windows. Perform the necessary cabling
and configuration of the transmitter before following the instructions.

PuTTY is available for download at www.vaisala.com.

uTTY cannot be used to access the transmitter through the User Port if

Modbus protocol. However, you

Port.

Opening a Serial/USB connection

1. Power up the PTU300 and start the PuTTY application.

2. Select the Serial & USB settings category, and check that the

correct COM port is selected in the Serial or USB line to connect
to field. Change the port if necessary.

If you are using a Vaisala USB cable, you can check the port that it
uses by clicking the USB Finder... button. This opens the Vaisala
USB Instrument Finder program that has been installed along with
the USB drivers.

3. Check that the other serial/USB line settings are correct for your

connection, and change if necessary. The default settings (shown in
Figure 57 on page 92) are used by the Service Port of the PTU300.

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User's Guide _______________________________________________________________________

The instructions below assume that the LAN/WLAN interface on the
transmitter is correctly configured and the network connection is already
done.

NOTE

0810-070

Figure 57 Opening a Serial Connection

4. Click the Open button to open the connection window and start
using the serial line.

If PuTTY is unable to open the serial port you selected, it will show
you an error message instead. If this happens, restart PuTTY and
check the settings.

Opening a Telnet Session (LAN/WLAN)

1. Power up the instrument and start the PuTTY application. If your
transmitter acquires a network address using DHCP, wait for a
minute for this to complete, then verify the address from the
transmitter.

2. In the Session window, select the Telnet connection type.

3. Enter the IP address of your transmitter in the Host Name (or IP
address) field. Use the default Telnet port 23.

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0810-071

Figure 58 Opening a Telnet Connection

4. Click the Open button to open the connection window and start

using the Telnet session.

If PuTTY is unable to connect the IP address you entered, it will
show you an error message instead. If this happens, check the
IP address and the connections, restart PuTTY, and try again.

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Command

Description

R

Start the continuous outputting

S

Stop the continuous outputting

INTV [0 ... 255 S/MIN/H]

Set the continuous output interval
(for RUN mode)

SEND [0 ... 255]

Output the reading once

DSEND

Output the reading once from all connected
transmitters (in STOP or POLL mode)

SCOM

Define a user-specific SEND command for one
message output

SMODE [STOP/SEND/RUN/
POLL/MODBUS]

Set the serial interface mode

SDELAY

View or set user port (RS-232 or RS-485)
answer minimum delay

SERI [baud p d s]

User Port settings (Default: 4800 E 7 1) baud:
300 ... 115200

ADDR [0 ... 255]

Set the transmitter address (for POLL and
MODBUS modes)

NET

View or set networking parameters for LAN and
WLAN interfaces

WLAN

View or set wireless network parameters for
WLAN interface

OPEN [0 ... 255]

Open a temporary connection to a POLL mode
device

CLOSE

Close the temporary connection (back to POLL
mode)

Command

Description

FORM

Set the output format of SEND and R
commands

TIME

Set the time

DATE

Set the date

FTIME [ON/OFF]

Add time to SEND and R outputs

FDATE [ON/OFF]

Add date to SEND and R outputs

FST [ON/OFF]

Add the state of probe heating and chemical
commands

SCOM

Assign a new command name that works like
the SEND command

UNIT

Select the metric or non-metric output units

List of Serial Commands

All commands can be issued either in uppercase or lowercase. In the
command examples, the keyboard input by the user is in bold type.

The notation <cr> refers to pressing the carriage return (Enter) key on
your computer keyboard. Enter a <cr> to clear the command buffer
before starting to enter commands.

In the tables below, the bold text in the brackets is the default setting.

Table 20 Measurement Commands

Table 21 Formatting Commands

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purge in connection with SEND and R

Chapter 4 _________________________________________________________________ Operation

Command

Description

DIR

Display recorded files

PLAY [0 ... 28] [START END]

Output recorded data file. Start and end times

yyyy-mm-dd hh:mm:ss

DSEL

Select data recording and display quantities
(1 ... 4).

DELETE

Delete all data files, including the memory of
the optional data logger module

UNDELETE

Recover the deleted files that have not been
overwritten

Command

Description

PUR

Set the automatic chemical purge

PURGE

Start the manual chemical purge

RGLIMIT [ON/OFF]

Prevent chemical purge if sensor temperature
is below 0 °C

Command

Description

CRH

Relative humidity calibration

CT

Temperature calibration

CTA

Additional temperature probe calibration

FCRH

Relative humidity calibration after sensor
change

CTEXT

Give the text to calibration information field

CDATE

Set the calibration date

ACAL

Analog output calibration

LC

Output the linear corrections in use

LCI [ON/OFF]

Activate or deactivate the linear offset or
offset/gain pressure corrections

LCI

Enter new linear offset and offset/ gain pres sur e
corrections to the transmitter

MPC

Output the multipoint corrections in use for
pressure measurement

MPCI [ON/OFF]

Activate or deactivate the multipoint corrections
for pressure measurement

MPCI

Enter new multipoint corrections for pressure
measurement

MPC RH
[ON/OFF/LIST/INIT/CLEAR]

Multipoint correction for relative humidity
OFFSET

Pressure one-point offset correction

Command

Description

AMODE

View the analog output modes

ASEL

Select the parameters for the analog outputs

ITEST

Test the analog outputs

Table 22 Data Recording Commands

can only be specified if the data logger module
is installed. The times must be given in the
following format:

Table 23 Chemical Purge Commands

Table 24 Calibration and Adjustment Commands

Table 25 Setting and Testing the Analog Outputs

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Command

Description

AERR

Change the analog error output values

AOVER [ON/OFF]

Extend analog output range by 10%

Command

Description

RSEL

Set and view the relays

RTEST

Test the relays

Command

Description

PRES [hPa]

Set the value for pressure compensations

XPRES [hPa]

Set the value for pressure compensations,
temporarily

PFIX

Select pressure compensation using either a
fixed value or using measured value

AVRG

Set pressure average period

HHCP

Set height offset for HCP calculation

HQNH

Set height offset for QNH calculation

HQFE

Set height offset for QFE calculation

PSTAB

Set the pressure stability indicator

PDMAX

Set the pressure difference limit

Command

Description

*0100P9

Data output query

*0200P9

Data output query

*9900P9

Data output query

*9900SN

Serial number query

Command

Description

?

Output information about the device

??

Output information about the device in POLL
mode

ALSEL

Set display alarms

CON

Set display contrast

ECHO [ON/OFF]

Turn the serial interface echo ON/OFF

ERRS

List present transmitter errors

FILT

Set the result filtering

FIND

All devices in POLL mode send their
addresses

HELP

List the currently available commands

LIGHT

Set the display backlight mode

LOCK

Lock the menu or disable the keypad

MODBUS

View Modbus diagnostic counters

MODS

View information about connected modules

RHLIMIT [ON/OFF]

Limit highest value of RH output to 100%

VERS

Display the software version information

XHEAT

Sensor heating

Table 26 Setting and Testing the Relays

Table 27 Pressure Commands

Table 28 GPS Commands

Table 29 Other Commands

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Getting Measurement Message from Serial Line

Starting Continuous Out put t ing

R

Enter the R command to start the continuous output of measurements.
The default output format depends on the quantities your transmitter
supports. You can change the output message format and interval with
the FORM and INTV commands. See sections FORM on page 101 and
INTV on page 122.

Example:

>r
P= 1021.6 hPa T= 23.2 'C RH= 5.8 %RH
>

If a value is too long to fit to the allocated space in the output, or if there
is an error in outputting the quantity, the value is displayed with stars '*'.

Example:

RH=***.* %RH T= 31.0 'C

Stopping Continuous Outputt ing

S

Use the S command to end the RUN mode. After this command all other
commands can be used. You can also press the Esc button or reset the
transmitter to stop the outputting.

See command SMODE to change the default (power-up) operation
mode.

Outputting Reading Once

SEND

Use the SEND command to output the reading once in STOP mode.
Example:

>send
P= 1021.6 hPa T= 23.3 'C RH= 5.7 %RH
>

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Assign an Alias for the SEND Command

Use the SCOM command to assign a new command that works like the
SEND command. The standard SEND command of the transmitter will

always function normally whatever the SCOM definition may be.
Command names are case-insensitive.

SCOM<cr>
Example (assigning the command P as an alias for the SEND command):

>scom
Send command : ? p
>p
P= 1021.4 hPa T= 23.2 'C RH= 5.7 %RH
>

You can remove the SCOM definition by pressing Esc when entering the
command name:

>scom
Send command : p ? <esc>
>

NOTE

Outputting Reading Once Fr om All Trans m it t e rs

Use the DSEND command to output the reading once from all connected
transmitters that are in STOP or POLL modes. In order to avoid data
collisions, the transmitters will send their response after a suitable delay.
The response includes the transmitters’s address, followed by their
measurement message.

The total execution time of the DSEND command depends on the bit rate
of the serial port connection. At slow speeds, it will take a considerable
amount of time for devices with large address number to respond. The
delay will be the same even if there are no other devices at all.

DSEND<cr>
Example (transmitters with addresses 3 and 25 responding):

>dsend
3 P= 1021.4 hPa T= 23.2 'C RH= 5.7 %RH
25 P= 1021.3 hPa T= 21.2 'C RH= 8.2 %RH
>

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