Vaisala PTB330TS User Manual

USER'S GUIDE

Vaisala Barometric Pressure Transfer

Standard

PTB330TS

M210983EN-A

PUBLISHED BY

Vaisala Oyj Phone (int.): [phone]
P.O. Box 26 Fax: [phone]
FI-00421 Helsinki
Finland

Visit our Internet pages at http://www.vaisala.com/
© Vaisala 2009
No part of this manual may be reproduced in any form or by any means,

electronic or mechanical (including photocopying), nor may its contents
be communicated to a third party without prior written permission of the
copyright holder.

The contents are subject to change without prior notice.
Please observe that this manual does not create any legally binding

obligations for Vaisala towards the customer or end user. All legally
binding commitments and agreements are included exclusively in the
applicable supply contract or Conditions of Sale.

________________________________________________________________________________

Table of Contents

CHAPTER 1

GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

About This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Contents of This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Version Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Related Manuals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

General Safety Considerations . . . . . . . . . . . . . . . . . . . . .10

Feedback . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Product Related Safety Precautions . . . . . . . . . . . . . . . . . .11

ESD Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Regulatory Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Recycling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

License Agreement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

CHAPTER 2

PRODUCT OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Introduction to PTB330TS . . . . . . . . . . . . . . . . . . . . . . . . . .15

Basic Features and Options . . . . . . . . . . . . . . . . . . . . . . .18

Pressure Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

Pressure Measurement Principle . . . . . . . . . . . . . . . . . . . .20

Humidity and Temperature Measurement (Option) . . . . . .21

Additional Temperature Probe (Option) . . . . . . . . . . . . . . .21

Chemical Purge (Option) . . . . . . . . . . . . . . . . . . . . . . . . . .22

CHAPTER 3

OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

Transport . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

Basic Use of the MI70 Indicator . . . . . . . . . . . . . . . . . . . . . .24

Menus and Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

Preparations for Measurement . . . . . . . . . . . . . . . . . . . . . .29

Charging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

Using AA Batteries. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Pressure Input Connectors . . . . . . . . . . . . . . . . . . . . . . . .30

MI70 Indicator Settings . . . . . . . . . . . . . . . . . . . . . . . . . . .31

Measuring Barometric Pressure . . . . . . . . . . . . . . . . . . . . .32

Measuring Humidity and Temperature (Option) . . . . . . . . .33

Graphic History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

VAISALA________________________________________________________________________ 1

________________________________________________________________________________

Recording Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36

Saving Individual Data Points . . . . . . . . . . . . . . . . . . . . . .38

Viewing and Deleting Recorded Files . . . . . . . . . . . . . . . .38

Alarm Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

MI70 Link Interface Software for Data Handling . . . . . . . . .40

CHAPTER 4

MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

Changing the MI70 Battery Pack . . . . . . . . . . . . . . . . . . . . .41

Changing the HMP155 Probe Filter . . . . . . . . . . . . . . . . . . .42

Changing the Sensor in the HMP155 . . . . . . . . . . . . . . . . . .44

Calibration and Adjustment . . . . . . . . . . . . . . . . . . . . . . . . .44

Calibration and Adjustment of PTB330 . . . . . . . . . . . . . . . .45

Opening and Closing the Adjustment Mode . . . . . . . . . . . .46

1-Point Adjustment (LCP1) . . . . . . . . . . . . . . . . . . . . . . . .47

Multipoint Adjustment (MPCP1) . . . . . . . . . . . . . . . . . . . . .48

Entering Adjustment Information . . . . . . . . . . . . . . . . . . . .50

Calibration and Adjustment of HMP155 . . . . . . . . . . . . . . .50

Calibrating and Adjusting Relative Humidity . . . . . . . . . . .51

Calibrating and Adjusting Temperature . . . . . . . . . . . . . . .53

CHAPTER 5

TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55

Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58

Return Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58

Vaisala Service Centers . . . . . . . . . . . . . . . . . . . . . . . . . . . .59

CHAPTER 6

SERIAL LINE COMMUNICATION WITH PTB330 BAROMETER . . . . . . .61

Connecting to the Serial Line . . . . . . . . . . . . . . . . . . . . . . . .61

Service Port Connection . . . . . . . . . . . . . . . . . . . . . . . . . .62

Installing the Driver for the USB Cable . . . . . . . . . . . . 63

User Port Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64

List of PTB330 Serial Commands . . . . . . . . . . . . . . . . . . . .66

Measurement Commands . . . . . . . . . . . . . . . . . . . . . . . . . . .68

INTV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68

R . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68

S . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69

SEND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69

Measurement Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69

AVRG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69

DPMAX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70

TQFE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70

HHCP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71

HQFE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71

HQNH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71

2 _______________________________________________________________________________

________________________________________________________________________________

Formatting Measurement Output . . . . . . . . . . . . . . . . . . . .71

FORM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71

UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73

User Port Serial Settings . . . . . . . . . . . . . . . . . . . . . . . . . . .74

SERI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .74

SMODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75

ECHO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76

Other Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77

? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77

ERRS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77

RESET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78

VERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78

CHAPTER 7

TECHNICAL DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .79

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80

Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .81

Inputs and outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .83

Mechanics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .84

Options and Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . .85

VAISALA________________________________________________________________________ 3

________________________________________________________________________________

4 _______________________________________________________________________________

________________________________________________________________________________

List of Figures

Figure 1 The PTB330TS with Case Open . . . . . . . . . . . . . . . . . . . . . . .17

Figure 2 Typical Connections and Cables . . . . . . . . . . . . . . . . . . . . . . .19

Figure 3 PTB330 Barometer in Tabletop Casing . . . . . . . . . . . . . . . . . .20

Figure 4 HMP155 Probe with Additional T-probe. . . . . . . . . . . . . . . . . .22

Figure 5 Transport Case Pressure Release Valve. . . . . . . . . . . . . . . . .23

Figure 6 Transport Case With Shoulder Strap. . . . . . . . . . . . . . . . . . . .24

Figure 7 MI70 Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

Figure 8 MI70 Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

Figure 9 MI70 Basic View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

Figure 10 Installing the Clip for AA Batteries . . . . . . . . . . . . . . . . . . . . . .30

Figure 11 Pressure Input Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . .31

Figure 12 Ready for Pressure Measurement. . . . . . . . . . . . . . . . . . . . . .33

Figure 13 PTB330 and HMP155 Connected . . . . . . . . . . . . . . . . . . . . . .35

Figure 14 Graphic History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36

Figure 15 Recording in Progress . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37

Figure 16 List of Data Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

Figure 17 Alarm Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

Figure 18 Changing the MI70 Battery Pack . . . . . . . . . . . . . . . . . . . . . . .42

Figure 19 HMP155 Sensor and Filter Structure. . . . . . . . . . . . . . . . . . . .43

Figure 20 PTB330 Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45

Figure 21 Inside of Open Barometer . . . . . . . . . . . . . . . . . . . . . . . . . . . .47

Figure 22 HMP155 Adjustment Buttons. . . . . . . . . . . . . . . . . . . . . . . . . .51

Figure 23 Starting Adjustment Mode for HMP155 . . . . . . . . . . . . . . . . . .52

Figure 24 Select Quantity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52

Figure 25 Service Port on the PTB330 Motherboard. . . . . . . . . . . . . . . .63

Figure 26 Wiring of the M12 (8-Pin) Connector . . . . . . . . . . . . . . . . . . . .65

Figure 27 Female M12 Connector with Screw Terminals . . . . . . . . . . . .66

Figure 28 Accuracy Over Temperature Range . . . . . . . . . . . . . . . . . . . .83

VAISALA________________________________________________________________________ 5

________________________________________________________________________________

6 _______________________________________________________________________________

________________________________________________________________________________

List of Tables

Table 1 Manual Revisions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Table 2 Related Manuals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Table 3 Quantities Measured by PTB330TS. . . . . . . . . . . . . . . . . . . . . . .16

Table 4 Quantities Available With Optional HMP155 . . . . . . . . . . . . . . . .16

Table 5 Menu Structure of the MI70 Indicator. . . . . . . . . . . . . . . . . . . . . .28

Table 6 Maximum Recording Times . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37

Table 7 Adjustment and Calibration Com ma nds for Module P1. . . . . . . .46

Table 8 Troubleshooting Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56

Table 9 Serial Communication Settings for the Service Port . . . . . . . . . .62

Table 10 Default Serial Communication Settings for the User Port . . . . . .64

Table 11 M12 Connector Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . .65

Table 12 The modifiers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72

Table 13 Output Quantities and Units. . . . . . . . . . . . . . . . . . . . . . . . . . . . .73

Table 14 Selection of Output Modes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76

Table 15 Options and Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .85

VAISALA________________________________________________________________________ 7

________________________________________________________________________________

8 _______________________________________________________________________________

Chapter 1 ________________________________________________________ General Information

CHAPTER 1

GENERAL INFORMATION

This chapter provides general notes for the manual and the PTB330TS.

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: This chapter provides general
notes for the manual and the PTB330TS.

- Chapter 2, Product Overview: This chapter introduces the features,
advantages, and the product nomenclature of PTB330TS.

- Chapter 3, Operation: This chapter contains information that is
needed to operate the PTB330TS.

- Chapter 4, Maintenance: This chapter contains information that is
needed maintenance of the PTB330TS.

- Chapter 5, Troubleshooting: This chapter contains instructions for
diagnosing problems with the PTB330TS.

VAISALA________________________________________________________________________ 9

User's Guide ______________________________________________________________________

- Chapter 6, Serial Line Communication With PTB330 Barometer:
This chapter contains instructions for serial line use of the PTB330
barometer.

- Chapter 7, Technical Data: This chapter provides the technical data
of the PTB330TS.

Version Information

Table 1 Manual Revisions

Manual Code Description

M210983EN-A March 2009 - First version

Related Manuals

The manuals listed below contain additional information about the
PTB330 barometer and the HMP155 humidity and temperature probe,
including the calculation formulas used by the products. You can
download the manuals from www.vaisala.com.

WARNING

CAUTION

Table 2 Related Manuals

Manual Code Description

M210855EN PTB330 User’s Guide
M210912EN HMP155 User’s Guide

General Safety Considerations

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

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 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

10 ___________________________________________________________________M210983EN-A

Note highlights important information on using the product.

Chapter 1 ________________________________________________________ General Information

Feedback

Vaisala Customer Documentation Team welcomes your comments and
suggestions on the quality and usefulness of this publication. If you find
errors or have other suggestions for improvement, please indicate the
chapter, section, and page number. You can send comments to us by e­mail: [e-mail]

Product Related Safety Precautions

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

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.

VAISALA_______________________________________________________________________ 11

User's Guide ______________________________________________________________________

Recycle all applicable material.

Dispose of batteries and the unit according to statutory regulations.
Do not dispose of with regular household refuse.

Regulatory Compliance

PTB330TS is in conformity with the following EU directives:

- EMC Directive (2004/108/EC)
Complies with the EMC product family standard

EN61326-1, Electrical equipment for measurement control and
laboratory use - Basic immunity test requirements.

- Low Voltage Directive (2006/95/EC)

- ROHS Directive (2002/95/EC)

Recycling

Trademarks

HUMICAP® and BAROCAP® are registered trademarks of Vaisala.
Microsoft®, Windows®, Windows 2000®, Windows XP®, Windows
Server 2003®, and Windows Vista® are are registered trademarks of
Microsoft Corporation in the United States and/or other countries.

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.

12 ___________________________________________________________________M210983EN-A

Chapter 1 ________________________________________________________ General Information

Warranty

Vaisala hereby represents and warrants all Products
manufactured by Vaisala and sold hereunder to be free
from defects in workmanship or material during a
period of twelve (12) months from the date of delivery
save for products for which a special warranty is given.
If any Product proves however to be defective in
workmanship or material within the period herein
provided Vaisala undertakes to the exclusion of any
other remedy to repair or at its own option replace the
defective Product or part thereof free of charge and
otherwise on the same conditions as for the original
Product or part without extension to original warranty
time. Defective parts replaced in accordance with this
clause shall be placed at the disposal of Vaisala.

Vaisala also warrants the quality of all repair and
service works performed by its employees to products
sold by it. In case the repair or service works should
appear inadequate or faulty and should this cause
malfunction or nonfunction of the product to which the
service was performed Vaisala shall at its free option
either repair or have repaired or replace the product in
question. The working hours used by employees of
Vaisala for such repair or replacement shall be free of
charge to the client. This service warranty shall be
valid for a period of six (6) months from the date the
service measures were completed.

This warranty does not however apply when the defect
has been caused through

a) normal wear and tear or accident;

b) misuse or other unsuitable or unauthorized use of
the Product or negligence or error in storing,
maintaining or in handling the Product or any
equipment thereof;

c) wrong installation or assembly or failure to se rv ice
the Product or otherwise follow Vaisala's service
instructions including any repairs or installation or
assembly or service made by unauthorized personnel
not approved by Vaisala or replacements with parts not
manufactured or supplied by Vaisala;

d) modifications or changes of the Product as well as
any adding to it without Vaisala's prior authorization;

e) other factors depending on the Customer or a third
party.

Notwithstanding the aforesaid Vaisala's liability under
this clause shall not apply to any defects arising out of
materials, designs or instructions provided by the
Customer.

This warranty is however subject to following
conditions:

a) A substantiated written claim as to any alleged
defects shall have been received by Vaisala within
thirty (30) days after the defect or fault became known
or occurred, and

b) The allegedly defective Product or part shall, should
Vaisala so require, be sent to the works of Vaisala or to
such other place as Vaisala may indicate in writing,
freight and insurance prepaid and properly packed and
labelled, unless Vaisala agrees to inspect and repair the
Product or replace it on site.

This warranty is expressly in lieu of and excludes all
other conditions, warranties and liabilities, express or
implied, whether under law, statute or otherwise,
including without limitation any implied warranties of
merchantability or fitness for a particular purpose and
all other obligations and liabilities of Vaisala or its
representatives with respect to any defect or deficiency
applicable to or resulting directly or indirectly from the
Products supplied hereunder, which obligations and
liabilities are hereby expressly cancelled and waived.
Vaisala's liability shall under no circumstances exceed
the invoice price of any Product for which a warranty
claim is made, nor shall Vaisala in any circumstances
be liable for lost profits or other consequential loss
whether direct or indirect or for special damages.

VAISALA_______________________________________________________________________ 13

User's Guide ______________________________________________________________________

14 ___________________________________________________________________M210983EN-A

Chapter 2 __________________________________________________________ Product Overview

CHAPTER 2

PRODUCT OVERVIEW

This chapter introduces the features, advantages, and the product
nomenclature of PTB330TS.

Introduction to PTB330TS

Barometric Pressure Transfer Standard PTB330TS combines a PTB330
digital barometer with a handheld MI70 indicator into a portable unit
that can be used as a transfer standard. Optional HMP155 probe is
available for accurate humidity and temperature measurement. The
PTB330TS is suitable for reference measurements in industrial and
meteorological areas.

The PTB330TS is housed in a durable and weatherproof transport case
that can be easily carried and shipped. The components of the
PTB330TS are placed in a foam interior, with accessories and user’s
guide placed in the lid organizer. The case includes a shoulder strap.

The quantities measured and calculated by PTB330TS are presented in

Table 3 on page 16. Quantities available using the optional HMP155

probe are presented in Table 4 on page 16.

VAISALA_______________________________________________________________________ 15

User's Guide ______________________________________________________________________

Table 3 Quantities Measured by PTB330TS

Quantity Abbreviation

Pressure (measures average
pressure from P

, P2, and P3)

1

Pressure from barometer

P

P

, P2, and P

1

3

module 1 or 2 or 3
Temperature of barometer

TP1, TP2, and TP

3

module 1 or 2 or 3
Pressure trend and tendency P

Pressure difference (P1 -P2) deltaP
Pressure difference (P1 -P3) deltaP
Pressure difference (P2-P3) deltaP

3h

12
13
23

QNH pressure QNH
QFE pressure QFE
Height Corrected Pressure HCP

Table 4 Quantities Available With Optional HMP155

Quantity Abbreviation

Relative Humidity RH
Temperature T
Additional T- probe temperature T

Dewpoint / Frostpoint

a

T

d/f

temperature
Dewpoint temperature T

d

Mixing ratio x
Wetbulb temperature T

w

16 ___________________________________________________________________M210983EN-A

Chapter 2 __________________________________________________________ Product Overview

0910-031

Figure 1 The PTB330TS with Case Open

where

1 = HMP155 humidity and temperature probe (option)
2 = P TB330 barometer in tabletop case, with room for CDs under

the case
3 = Shoulder strap and documentation
4 = Cables and pressure tubing
5 = Spiral cable and additional T-probe (option)
6 = MI70 indicator
7 = AC adapter and accessories (e.g. quick connector and M12

connector)

VAISALA_______________________________________________________________________ 17

User's Guide ______________________________________________________________________

Basic Features and Options

- PTB330 digital barometer for accurate pressure measurement

- 1 ... 3 barometer modules

- barbed fitting for pressure input installed, quick connector
supplied

- calculated output quantities, QFE and QNH, available

- handheld MI70 indicator with a user friendly, multilingual display

- service port for MI70 Link Interface Software or PC

- weatherproof transport case
Available options:

- ISO/IEC 17025 Accredited calibration for PTB330

- HMP155 humidity and temperature probe

- HMP155 options: additional temperature probe, manually
controlled chemical purge feature

- MI70 Link software and USB or RS232 cable for downloading
measurement data to a PC

- USB service cable for connecting to the service port on the
PTB330 barometer

18 ___________________________________________________________________M210983EN-A

Chapter 2 __________________________________________________________ Product Overview

0901-017

Figure 2 Typical Connections and Cables

Pressure Measurement

The PTB330TS uses a PTB330 series digital barometer that is housed
in a tabletop casing. The barometer does not come with its own display
and keypad; instead, it is designed to be operated using the handheld
MI70 indicator. The MI70 indicator also provides the operation power
for the barometer.

The pressure port, and the M12 connector for the MI70 indicator, are
placed on the side of the casing for easy access. The top of the casing
has a holder for the MI70 indicator for tabletop use. To access the
service port, the barometer can be opened without removing it from the
tabletop casing.

VAISALA_______________________________________________________________________ 19

User's Guide ______________________________________________________________________

0810-032

Figure 3 PTB330 Barometer in Tabletop Casing

Numbers refer to Figure 3 on page 20:

1 = MI70 holder
2 = M12 connector for MI70 connection
3 = Pressure port

Pressure Measurement Principle

PTB330 uses 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 ruggedness of the BAROCAP
outstanding and the sensor is resistant to mechanical and thermal
shocks.

The measurement principle of the PTB330 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.

sensor is

PTB330 can be ordered with 1 ... 3 barometer modules. The use of more
than one module provides increased accuracy and fault tolerance.

20 ___________________________________________________________________M210983EN-A

Chapter 2 __________________________________________________________ Product Overview

Humidity and Temperature Measurement (Option)

An optional HMP155 humidity and temperature probe is available for
the PTB330TS. HMP155 provides reliable humidity and temperature
measurement in a wide range of applications. Humidity measurement is
based on the capacitive thin film polymer sensor HUMICAP®180R.
Temperature measurement is based on resistive platinum sensors
(Pt100). Both the humidity and temperature sensors are located at the
tip of the probe, protected by a sintered Teflon filter.

The MI70 indicator is used as the display, and the MI70 indicator also
provides the operation power for the probe. The PTB330 and HMP155
can be connected to the MI70 indicator simultaneously. The HMP155
version that is offered for the PTB330TS has RS-485 digital output.

Additional Temperature Probe (Option)

The HMP155 can be ordered with an additional temperature probe. The
T-probe is attached to the HMP155 with a two meter cable.

When the HMP155 is equipped with the additional T-probe, it
calculates the relative humidity value based on the dewpoint (Td) value

obtained from the humidity probe and the Ta value obtained from the T­probe. This means that when you measure relative humidity (RH),

mixing ratio (x) or wetbulb temperature (Tw) using HMP155 with T­probe, it is important to make sure that the humidity probe and the T-

probe are placed in the same conditions in order to get accurate
readings.

VAISALA_______________________________________________________________________ 21

User's Guide ______________________________________________________________________

0910-033

Figure 4 HMP155 Probe with Additional T-probe

Chemical Purge (Option)

Chemicals in the measured gas may interfere with the humidity sensor
of the HMP155. The sensor polymer absorbs the interfering chemical,
gradually reducing its ability to absorb water molecules. Consequently
the sensor gain decreases.

The chemical purge function heats humidity sensor to a temperature of
approximately +180 °C for several minutes, which evaporates the
interfering chemical and any moisture on the sensor. The purge function
starts with heating stage, continues with settling and when the
temperature of the sensor has decreased, the probe returns to normal
mode. The entire cycle takes about eight minutes. For the duration of the
purge, the output from the HMP155 is locked to the last measured
values.

If your HMP155 is equipped with the chemical purge function, perform
it always before RH calibration (see section Calibration and Adjustment

of HMP155 on page 50) or when there is a reason to believe that a

sensor has become exposed to an interfering chemical. The purge can
be activated from the Functions menu of the MI70 indicator. Make sure
that the temperature of the sensor has come down to normal temperature
before starting a calibration.

If the chemical purge function is enabled, and the HMP155 is left
continuously powered, it will perform the chemical purge at a very long
interval of approximately 22.7 days (automatic purge). This interval can
be changed using serial line; see the HMP155 User’s Guide.

22 ___________________________________________________________________M210983EN-A

Chapter 3 ________________________________________________________________ Operation

CHAPTER 3

OPERATION

This chapter contains information that is needed to operate the
PTB330TS.

Transport

Before transporting the PTB330TS, make sure that all instruments are
securely placed in the foam interior. The inside of the case should be
clean and dry. If water has entered the case due to operation in the field,
let it dry before closing.

The transport case has an air pressure release valve below the handle.
Close the valve for maximum protection during for transport, and open
it before attempting to open the case. The valve is closed when the
indicator in the valve is red, and open when it is green. Refer to Figure

5 on page 23. It may take some minutes for pressure to equalize after

opening the valve.

0801-001

Figure 5 Transport Case Pressure Release Valve

VAISALA_______________________________________________________________________ 23

User's Guide ______________________________________________________________________

A shoulder strap is included with the transport case. The attachment
holes for the shoulder strap are located on the handle; see Figure 6 on

page 24. The other two holes on the case can be used to lock the case

with a padlock (not supplied).

0902-009

Figure 6 Transport Case With Shoulder Strap

where

1 = Holes for shoulder strap clips
2 = Padlock holes for locking the case (lock not included)

Basic Use of the MI70 Indicator

The MI70 indicator is used as the display and keypad in the PTB330TS.
Connections to the PTB330 barometer and the HMP155 probe are
through the two connection ports at the bottom of the indicator. The
MI70 indicator has a rechargeable battery, which provides the operation
power to the PTB330 and the HMP155.

24 ___________________________________________________________________M210983EN-A

Chapter 3 ________________________________________________________________ Operation

NOTE

The MI70 indicator is also used in other Vaisala products, such as the
Vaisala HUMICAP Hand-Held Humidity and Temperature Meter
HM70. Because of this, the MI70 indicator has some software features
and accessories that are not relevant for the PTB330TS, and are not
described in this manual.

0704-035

Figure 7 MI70 Indicator

Numbers refer to Figure 7 on page 25:

1 = Recharger connection
2 = Power button
3 = Connection ports (2) for cables

VAISALA_______________________________________________________________________ 25