Vaisala PTB330 User Manual

USER'S GUIDE

Vaisala BAROCAP® Digital Barometer

PTB330

M210855EN-D

PUBLISHED BY
Vaisala Oyj	Phone (int.):	+358	9 8949 1
P.O. Box 26	Fax:	+358	9 8949 2227
FI-00421 Helsinki
Finland

Visit our Internet pages at http://www.vaisala.com/

© Vaisala 2012

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............................................................................	9
About This Manual ...................................................................	9
Contents of This Manual .......................................................	9
Version Information .............................................................	10
Documentation Conventions...............................................	10
Safety.......................................................................................	11
ESD Protection .......................................................................	11
Recycling ................................................................................	12
Trademarks .............................................................................	12
License Agreement ................................................................	12
Warranty..................................................................................	12
CHAPTER 2
PRODUCT OVERVIEW................................................................................	13
Introduction to PTB330..........................................................	13
Basic Features and Options................................................	14
Pressure Measurement.......................................................	14
Outer Structure of the Barometer........................................	15
Inner Structure of the Barometer ........................................	16
CHAPTER 3
INSTALLATION............................................................................................	17
Mounting the Housing ...........................................................	17
Standard Mounting without Mounting Plate ........................	17
Wall Mounting with Wall Mounting Kit.................................	18
Mounting with DIN Rail Installation Kit ................................	19
Pole Installation with Installation Kit for Pole or Pipeline ....	19
Mounting Rain Shield with Installation Kit ...........................	22
Panel Mounting Frame........................................................	22
Pressure connections............................................................	24
General about Wiring and Grounding..................................	25
Cable Bushings ...................................................................	25
Grounding the Cables .........................................................	26
Grounding the Barometer Housing .....................................	27
Alternate Wiring Systems......................................................	27
Signal and Power Supply Wiring.........................................	28
M-12 (8-Pin) Connector.......................................................	30
D-9 Connector.....................................................................	31
Optional Modules ...................................................................	32
AC Power Supply Module ...................................................	32
Installation ......................................................................	33
Warnings .............................................................................	34

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Galvanic Isolation for Output ...............................................	37
Analog Output Module AOUT-1T ........................................	38
Installation and Wiring....................................................	38
Relay Module RELAY-1L ....................................................	40
Installation and Wiring....................................................	40
Selecting the Activation State of the Relay .........................	41
RS-422/RS-485 Interface Module (RS485-1) .....................	42
Installation and Wiring....................................................	43
CHAPTER 4
OPERATION.................................................................................................	47
Getting Started........................................................................	47
Display/Keypad (Optional).....................................................	47
Basic Display .......................................................................	47
Menus and Navigation....................................................	48
Pressure 3h Trend and Tendency Reading ........................	49
Using Basic Display........................................................	49
Pressure Tendency Graphics and Codes ......................	49
Using Serial Line ............................................................	51
Missing Trend.................................................................	51
Graphic History....................................................................	51
Information Display..............................................................	53
Display Settings...................................................................	54
Changing Quantities.......................................................	54
Changing Units...............................................................	54
Rounding ........................................................................	55
Backlight.........................................................................	55
Contrast..........................................................................	55
Keypad Lock...................................................................	55
Measuring Settings..............................................................	56
Diagnostic Settings..............................................................	56
Serial Interface Settings ......................................................	57
System Settings...................................................................	58
Language .......................................................................	58
Menu PIN Lock...............................................................	58
Factory Settings .............................................................	59
Clearing Graph Displays ................................................	59
Relay Settings .....................................................................	60
Relay Outputs.................................................................	60
Testing the Operation of Relays.....................................	61
Analog Output Settings .......................................................	62
Analog Output Quantities ...............................................	62
Testing the Operation of Analog Outputs.......................	62
Analog Output Fault Indication.......................................	63
MI70 Link Interface Software for Data Handling..................	63
Serial Line Communication ...................................................	64
User Port Connection ..........................................................	65
Service Port Connection......................................................	66
Terminal Program Settings..................................................	66
Opening a Serial/USB connection..................................	67
List of Serial Commands .......................................................	68
General Settings .....................................................................	70
Changing Quantities and Units............................................	70
FORM.............................................................................	70

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UNIT...............................................................................	73
DATE and TIME.............................................................	75
Measurement Related Commands .....................................	77
TQFE..............................................................................	77
DPMAX ..........................................................................	78
AVRG .............................................................................	79
HHCP .............................................................................	79
HQFE .............................................................................	80
HQNH.............................................................................	80
ICAOQNH ......................................................................	81
PSTAB ...........................................................................	82
User Port Serial Settings.....................................................	84
SDELAY .........................................................................	84
SERI...............................................................................	84
SMODE ..........................................................................	85
INTV ...............................................................................	86
ECHO.............................................................................	86
System Information Commands..........................................	87
? .....................................................................................	87
ERRS .............................................................................	87
VERS .............................................................................	88
Resetting Barometer by Using Serial Line ..........................	88
RESET ...........................................................................	88
Locking Menu/Keypad by Using Serial Line .......................	89
LOCK .............................................................................	89
Data Recording.......................................................................	90
Selecting Data Recording Quantities ..................................	90
DSEL..............................................................................	90
View Recorded Data ...........................................................	91
DIR .................................................................................	91
PLAY ..............................................................................	92
DELETE/UNDELETE.....................................................	93
Operating Relays....................................................................	93
Quantity for Relay Output....................................................	93
Measurement-Based Relay Output Modes.........................	93
Relay Setpoints..............................................................	93
Hysteresis ......................................................................	95
Relay Indicating Barometer Error Status ............................	95
Enabling/Disabling Relays ..................................................	96
Setting Relay Outputs .........................................................	96
RSEL..............................................................................	96
Testing the Operation of Relays..........................................	98
RTEST ...........................................................................	98
Operating RS-485 Module .....................................................	99
Networking Commands.......................................................	99
ADDR ...........................................................................	100
SDELAY .......................................................................	100
SMODE POLL..............................................................	100
SCOM ..........................................................................	100
OPEN ...........................................................................	101
CLOSE .........................................................................	101
SEND ...........................................................................	101
Operating Analog Output ....................................................	102
Changing Output Mode and Range ..................................	102
Analog Output Quantities ..................................................	104

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AMODE/ASEL ..............................................................		104
Analog Output Tests..........................................................		105
ATEST..........................................................................		105
Analog Output Fault Indication Setting..............................		105
AERR............................................................................		105
CHAPTER 5
MAINTENANCE..........................................................................................		107
Periodic Maintenance...........................................................		107
Cleaning ............................................................................		107
Error States ...........................................................................		107
Technical Support ................................................................		110
Product Returns....................................................................		110
CHAPTER 6
CALIBRATION AND ADJUSTMENT.........................................................		111
Pressure ................................................................................		111
Opening and Closing the Adjustment Mode......................		112
Pressure Adjustment ...........................................................		113
Adjustments Using Display/Keypad ..................................		114
Linear/Offset Adjustment Using Serial Line ......................		116
LCP1, LCP2, LCP3 ......................................................		116
Multipoint Adjustment Using Serial Line............................		118
MPCP1, MPCP2, MPCP3 ............................................		118
Analog Output Adjustment (Ch1)........................................		121
Using Display/Keypad .......................................................		121
Using Serial Line ...............................................................		122
ACAL ............................................................................		122
Feeding Adjustment Information ........................................		123
Using Display/Keypad .......................................................		123
Using Serial Line ...............................................................		123
CTEXT..........................................................................		123
CDATE .........................................................................		123
CHAPTER 7
TECHNICAL DATA ....................................................................................		125
Specifications .......................................................................		125
Performance ......................................................................		125
Barometric pressure range 500 ...	1100 hPa ...............	125
Barometric pressure range 50 ...	1100 hPa .................	125
Operating Environment .....................................................		126
Inputs and outputs.............................................................		127
Mechanics .........................................................................		128
Technical Specifications of Optional Modules...................		128
Options and Accessories ....................................................		130
Dimensions (in mm) .............................................................		131

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APPENDIX A
CALCULATION FORMULAS ....................................................................	133
ICAOQNH Mode for QNH and QFE.............................	134
APPENDIX B
UNIT CONVERSION TABLES...................................................................	135
APPENDIX C
PA11A EMULATION MODE ......................................................................	139
Activating the PA11A Emulation Mode..............................	139
PA11A Message Format ......................................................	140

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List of Figures
Figure 1	Barometer Body........................................................................	15
Figure 2	Open Barometer Interior...........................................................	16
Figure 3	Standard Mounting ...................................................................	17
Figure 4	Mounting with Wall Mounting Kit ..............................................	18
Figure 5	Dimensions of Plastic Mounting Plate ......................................	18
Figure 6	Mounting with DIN Rail Installation Kit .....................................	19
Figure 7	Vertical Pole (Side)...................................................................	20
Figure 8	Vertical Pole (Front)..................................................................	20
Figure 9	Horizontal Pole .........................................................................	20
Figure 10	Mounting with Metal Wall Mounting Plate ................................	21
Figure 11	Dimensions of Metal Mounting Plate (mm) ..............................	21
Figure 12	Mounting Rain Shield with Installation Kit ................................	22
Figure 13	Panel Mounting Frame .............................................................	23
Figure 14	Panel Mounting Dimensions.....................................................	23
Figure 15	Cable Bushings.........................................................................	25
Figure 16	Grounding the Screen of Electrical Cable ................................	26
Figure 17	Screw Terminal Block on Motherboard ....................................	28
Figure 18	Wiring of Optional M-12 (8-Pin) Connector ..............................	30
Figure 19	Wiring of Optional D-9 Connector.............................................	31
Figure 20	AC Power Supply Module.........................................................	32
Figure 21	Galvanic Power Isolation ..........................................................	37
Figure 22	Analog Output 1 Module AOUT-1T ..........................................	38
Figure 23	Analog Output Dip Switch Positions.........................................	39
Figure 24	Relay Module............................................................................	41
Figure 25	RS485-1 Module.......................................................................	42
Figure 26	4-Wire RS-485 Bus...................................................................	44
Figure 27	2-Wire RS-485 Bus...................................................................	45
Figure 28	Basic Display ............................................................................	47
Figure 29	Main Menu (Main Level) ...........................................................	48
Figure 30	P3H Tendency............................................................................	49
Figure 31	Pressure Tendency Description ...............................................	50
Figure 32	Graphical Display .....................................................................	51
Figure 33	Device Information on Display..................................................	53
Figure 34	Checking Stability of the Measurement....................................	57
Figure 35	Relay Indicators on Display ......................................................	60
Figure 36	Service Port Connector and User Port Terminal
	on Motherboard ........................................................................	64
Figure 37	Connection Example Between PC Serial Port and User Port ..	65
Figure 38	Opening a Serial Connection....................................................	67
Figure 39	Relay Output Modes.................................................................	94
Figure 40	FAULT STATUS Relay Output Mode.......................................	95
Figure 41	Current/Voltage Switches of Output Module ..........................	102
Figure 42	Dip Switch Selection Example................................................	103
Figure 43	Error Indicator and Error Message .........................................	108
Figure 44	Adjustment Menu....................................................................	112
Figure 45	PTB330 Adjustments..............................................................	113
Figure 46	Barometer Body Dimensions..................................................	131
Figure 47	Pressure Conversion Chart ....................................................	135

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List of Tables

Table 1	Manual Revisions .....................................................................		10
Table 2	Quantities Measured by PTB330	.............................................	15
Table 3	Pin Assignments to RS-232-/485 Serial Output.......................		30
Table 4	Pin Assignments to RS-232/485 Serial Output ........................		31
Table 5	Connecting the Twisted Pair Wires to the Screw Terminals ....		44
Table 6	4-Wire (Switch 3: On)...............................................................		45
Table 7	2-Wire (Switch 3: Off) ...............................................................		45
Table 8	Periods for Trend and Max/Min Calculations ...........................		52
Table 9	Graph Information Messages in Cursor Mode .........................		52
Table 10	Default Serial Communication Settings for the User Port ........		65
Table 11	Fixed Communication Settings for Service Port ......................		66
Table 12	FORM Modifiers .......................................................................		71
Table 13	Symbols Used in FORM Checksum Equations .......................		72
Table 14	Quantity Symbols .....................................................................		72
Table 15	Output Quantities and Units .....................................................		73
Table 16	Selection of Output Modes.......................................................		85
Table 17	ERRS command line parameters	.............................................	88
Table 18	Error Messages ......................................................................		109
Table 19	Adjustment and Calibration Commands for Barometer
	Module P1 ..............................................................................		112
Table 20	Barometric Pressure range 500 ...	1100 hPa at 20°C............	125
Table 21	Barometric pressure range 50 ...	1100 hPa at 20°C ..............	125
Table 22	Temperature Dependence****................................................		126
Table 23	Total Accuracy at -40 ... +60°C (-40 ... +140 °F)....................		126
Table 24	Long Term Stability ................................................................		126
Table 25	Operating Environment ..........................................................		126
Table 26	Inputs and outputs..................................................................		127
Table 27	Mechanics ..............................................................................		128
Table 28	AC Power Supply Module ......................................................		128
Table 29	Analog Output Module AOUT-1 .............................................		128
Table 30	Relay Module .........................................................................		129
Table 31	RS-422/RS-485 Module RS485-1..........................................		129
Table 32	Options and Accessories........................................................		130
Table 33	Symbols used in QNH calculation formulas...........................		134
Table 34	Unit Conversion Table for all Pressure Quantities
	(Excluding Pxx and P3h) ........................................................		136
Table 35	Unit Conversion Table for Difference Pressure Pxx and
	Pressure Trend P3h Quantities ...............................................		136
Table 36	Unit Conversion Table for Settings Pressure Stability
	PSTAB and Maximum Pressure Difference PMAX .............		136
Table 37	Unit Conversion Table for Settings HHCP and HQFE ...........		137
Table 38	Unit Conversion Table for Settings HQNH.............................		137
Table 39	Unit Conversion Table for Setting TQFE................................		137

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Chapter 1 ________________________________________________________ General Information

CHAPTER 1

GENERAL INFORMATION

This chapter provides general notes for the manual and the product.

About This Manual

This manual provides information for installing, operating, and maintaining Vaisala BAROCAP® Digital Barometer PTB330.

Contents of This Manual

This manual consists of the following chapters:

-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 PTB330.

-Chapter 3, Installation, provides you with information about how to install the product.

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

-Chapter 5, Maintenance, contains information that is needed in the basic maintenance of the product.

-Chapter 6, Calibration and Adjustment, contains instructions for performing the calibration and adjustment of the product.

-Chapter 7, Technical Data, provides the technical data of the product.

-Appendix A, Calculation Formulas, contains the calculation formulas used by the product.

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-Appendix B, Unit conversion tables, contains the unit conversion tables.

-Appendix C, PA11A Emulation Mode, describes the PA11A emulation mode of the PTB330 series.

Version Information

Table 1	Manual Revisions
Manual Code		Description
M210855EN-D		December 2012. This version. Command
		descriptions rewritten. Other, more minor
		changes throughout.
M210855EN -C		January 2008. Previous version.

		Documentation Conventions
		Throughout the manual, important safety considerations are
		highlighted as follows:
	WARNING	Warning alerts you to a serious hazard. If you do not read and follow
		instructions very carefully at this point, there is a risk of injury or
		even death.

CAUTION	Caution warns you of a potential hazard. If you do not read and
	follow instructions carefully at this point, the product could be
	damaged or important data could be lost.

NOTE	Note highlights important information on using the product.

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Chapter 1 ________________________________________________________ General Information

Safety

		The product delivered to you has been tested for safety and approved
		as shipped from the factory. Note the following precautions:
	WARNING	Ground the product, and verify outdoor installation grounding
		periodically to minimize shock hazard.

	WARNING	To avoid electric shock, never open the PTB330 enclosure while the
		transmitter is connected to mains power.

CAUTION	Do not modify the unit. Improper modification can damage the
	product or lead to malfunction.

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.

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Recycling

Trademarks

BAROCAP® is a registered trademark of Vaisala. Windows is a registered trademark of Microsoft Corporation.

License Agreement

All rights to any software are held by Vaisala or third parties. The customer is allowed to use the software only to the extent that is provided by the applicable supply contract or Software License Agreement.

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.

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Chapter 2 __________________________________________________________ Product Overview

CHAPTER 2

PRODUCT OVERVIEW

This chapter introduces the features, advantages, and the product nomenclature of PTB330.

Introduction to PTB330

Vaisala BAROCAP® Digital Barometer PTB330 provides reliable pressure measurement in a wide range of applications. Digital outputs RS-232 (standard) or RS-422/485 (optional) can be selected. Alternatively, analog outputs can be chosen between current and optional voltage signals. A local graphical display is available as well. The quantities measured and calculated by PTB330 are presented in Table 2 on page 15.

The PTB330 barometer is available with one, two, or three barometer modules. The barometer can be used successfully both in accurate pressure measurement applications at room temperature and in demanding automatic weather station applications.

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Basic Features and Options

-Applicable in industrial and meteorological areas

-Calculated aviation related output quantities: QFE and QNH

-1 ... 3 BARO-1 barometer modules (sensors)

-Barometer mounting accessories for multiple installation purposes

-Service port for MI70 Link Interface Software or PC

-Four module slots

-IP 65 housing

-Screw terminal, optional M12 connector or D-9 connector

-Optional graphical display showing the measurement trends of the quantities chosen by the user

-Optional modules: power supply module, RS-485 module, analog output module, and relay module

-Optional USB cable for service use or data transfer

Pressure Measurement

The PTB330 series barometers use a BAROCAP® silicon capacitive absolute pressure sensor developed by Vaisala for barometric pressure measurement applications. The BAROCAP® sensor has excellent hysteresis and repeatability characteristics, low temperature dependence, and a very good long-term stability. The BAROCAP® sensor is very robust and resistant to mechanical and thermal shocks.

The measurement principle of the PTB330 series digital barometers is based on an advanced RC oscillator and reference capacitors against which the capacitive pressure sensor is continuously measured. The microprocessor of the barometer performs compensation for pressure linearity and temperature dependence.

Each barometer module in PTB330 has its own adjustment coefficients for different reference pressures across the entire temperature range. This achieves the best possible accuracy needed in barometric pressure measurements.

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Chapter 2 __________________________________________________________ Product Overview

Table 2	Quantities Measured by PTB330
Quantity		Abbreviation
Pressure (measures average		P
pressure from P1, P2, and P3)
Pressure from barometer		P1, P2, and P3
module 1 or 2 or 3
Temperature of barometer		TP1, TP2, and TP3
module 1 or 2 or 3
Pressure trend (includes		P3h
pressure tendency on display)
Pressure difference (P1 -P2)		P12
Pressure difference (P1 -P3)		P13
Pressure difference (P2-P3)		P23 (available on serial port
		only)
QNH pressure		QNH
QFE pressure		QFE
Height Corrected Pressure		HCP
Pressure tendency (available on		A3h
serial port only)

Outer Structure of the Barometer

Figure 1 Barometer Body

Numbers refer to Figure 1 above:

1= Cable for signal/powering Ø 8 ... 11 mm

2= Pressure port

3= Cable for optional power supply/relay module Ø 8 ... 11 mm

4= Cover LED

5= Display with keypad (optional)

6= Cover screw (4 pcs)

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Inner Structure of the Barometer

Figure 2 Open Barometer Interior

Numbers refer to Figure 2 above:

1= Adjustment button with indicator LED

2= Galvanic isolation module (optional)

3= Power supply mode selections

(Do not change the factory settings!)

4= Service port (RS-232)

5= Module 1/Module 3 connectors

6= User port

7= Module 2/Module 4 connectors

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Chapter 3 _______________________________________________________________ Installation

CHAPTER 3

INSTALLATION

This chapter provides you with information about how to install the product.

Mounting the Housing

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

Standard Mounting without

Mounting Plate

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

	169
96
	7Ø
Figure 3	Standard Mounting

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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 barometer before mounting.

Figure 4 Mounting with Wall Mounting Kit

Numbers refer to Figure 4 above:

1= Plastic mounting plate

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

3= The arched side up

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

5= Holes for wall/junction box mounting

Figure 5 Dimensions of Plastic Mounting Plate

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Chapter 3 _______________________________________________________________ Installation

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).

To mount PTB330 using the DIN rail installation kit:

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

2.Fasten the barometer to the plastic mounting plate with 4 screws provided for that purpose.

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

Figure 6 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 upwards; see Figure 10 on page 21.

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Figure 7 Vertical Pole (Side)

Figure 8 Vertical Pole (Front)

Numbers refer to Figure 8 above:

1= Fixing brackets (2 pcs) M8 (provided) for 30 ... 102 mm poles.

2= Mounting nuts M8 (4 pcs)

Figure 9 Horizontal Pole

Number refers to Figure 9 above: 1 = Mounting nuts M8 (4 pcs)

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Chapter 3 _______________________________________________________________ Installation

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

Figure 10 Mounting with Metal Wall Mounting Plate

Numbers refer to Figure 10 above:

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

2= Fasten the barometer 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.

Figure 11

Dimensions of Metal Mounting Plate (mm)

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Mounting Rain Shield with

Installation Kit

Figure 12 Mounting Rain Shield with Installation Kit

Numbers refer to Figure 12 above:

1= Fasten the rain shield with installation kit (Vaisala order code: 215109) to the metal mounting plate with 2 (M6) mounting 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 barometer to the mounting plate with 4 fixing screws (provided).

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.

To use the panel mounting frame:

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 13 on page 23.

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Chapter 3 _______________________________________________________________ Installation

Figure 13 Panel Mounting Frame

Numbers refer to Figure 13 above:

1= Panel (not included)

2= Panel mounting frame

Figure 14 Panel Mounting Dimensions

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Pressure connections

The barometer is equipped with a barbed pressure fitting which is ideal for 3-4mm internal diameter tubing. If you require some other pressure fitting, you can replace the standard barbed fitting. The main pressure connector in the barometer housing has a metric M5 internal thread. It is, however, in practice possible to use pressure fittings with a non-metric 10-32 external thread together with this main pressure connector.

The barbed pressure fitting supplied with the barometer is not a static pressure head and cannot be used in turbulent or high-speed wind conditions. The barometric pressure measurement accuracy quoted for the PTB330 series digital barometers does not include any wind or air conditioning system induced measurement errors.

Protect the pressure fitting from the rain. If water gets into the pressure connector it may cause errors in the pressure measurement. The PTB330 barometers are designed to measure the pressure of clean, non-condensing, non-conducting, and non-corrosive gases only.

If you use Static Pressure Head SPH10/20 with PTB330, make sure the SPH10/20 tube is pointing downwards from PTB330. This way the condensed water does not accumulate inside the tube and cause measurement errors.

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Chapter 3 _______________________________________________________________ Installation

General about Wiring and Grounding

Cable Bushings

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

	Figure 15		Cable Bushings
	Numbers refer to Figure 15 above:
	1	= Cable for signal/powering Ø 8 ... 11 mm
	2	= Pressure port
	3	= Cable for optional power supply/relay module Ø 8 ... 11 mm
NOTE	When there is high electric noise level (for example, near powerful

electric motor) in the operating environment, Vaisala recommends using shielded cables or taking care that the signal cables are separated from other cables.

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USER'S GUIDE____________________________________________________________________

Grounding the Cables

To ensure the best possible EMC performance, you must ground the screen of the electrical cable as shown in 1212-005

Figure 16 below and in the instructions below that.

1212-005

Figure 16 Grounding the Screen of Electrical Cable

To ground the electrical cables:

1.Cut back outer sheath to desired length.

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

1212-005

Figure 16

above).

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 90° (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.

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Chapter 3 _______________________________________________________________ Installation

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

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

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

Grounding the Barometer Housing

If you need to ground the barometer housing, the grounding connector is found inside the housing. Make sure that different groundings are made to the same potential. Otherwise harmful ground currents may be generated.

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

Alternate Wiring Systems

There are four ways of powering the barometer: using basic wiring, the D-9 connector, the M-12 connector, or the optional external ACadapter.

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 on page 28.

-When using 8-pin connector, see section M-12 (8-Pin) Connector on page 30.

-When using D-9 connector, see section D-9 Connector on page 31.

-When using an optional external AC-adapter.

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USER'S GUIDE____________________________________________________________________

Signal and Power Supply Wiring

When wiring the power supply module, see section AC Power Supply

Module on page 32.

Figure 17 Screw Terminal Block on Motherboard

Numbers refer to Figure 17 above:

1= Power control (0VDC = OFF, 5VDC = ON, if feature enabled)

2= User port (RS-232 terminals)

3= Power supply terminals 10 ... 36 V DC

4= Test terminal (not connected, not used in PTB330)

5= Probe cable shield (not used in PTB330)

6= Probe bus (not used in PTB330)

7= Probe power (not used in PTB330)

WARNING Make sure that you connect only de-energized wires.

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