Vaisala PTB210 User`s guide
Vaisala PTB210 SERIES digital barometers with analog output provide accurate pressure measurements for various applications. They feature a rugged, corrosion-resistant housing with IP65 protection, making them ideal for outdoor installations. With different scaling options between 500...1100 hPa for 0...5V or 0...2.5V, these barometers offer versatile analog output capabilities.
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USER'S GUIDE
Digital Barometers with Analog Output
PTB210 Series
M210670EN-B
PUBLISHED BY
Vaisala Oyj
P.O. Box 26
FIN-00421 Helsinki
Finland
Phone (int.): +358 9 8949 1
Fax:
Visit our Internet pages at http://www.vaisala.com/
+358 9 8949 2227
© Vaisala 2006
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............................................................................ 3
Safety......................................................................................... 3
Feedback............................................................................... 3
Recycling .................................................................................. 4
Trademarks ............................................................................... 4
License Agreement .................................................................. 4
Warranty.................................................................................... 5
CHAPTER 2
PRODUCT DESCRIPTION ............................................................................ 7
CHAPTER 3
INSTALLATION.............................................................................................. 9
Mounting ................................................................................... 9
Static Pressure Head .......................................................... 10
Connections............................................................................ 11
CHAPTER 4
CALIBRATION AND ADJUSTMENT........................................................... 13
Wizard Software ..................................................................... 13
Operation............................................................................. 14
CHAPTER 5
TECHNICAL DATA ...................................................................................... 19
Technical Specifications ....................................................... 19
Operating Range................................................................. 19
Accuracy.............................................................................. 19
General................................................................................ 20
Electromagnetic Compatibility............................................. 21
Dimensions in mm (inches) .................................................. 22
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List of Figures
Figure 1 PTB210 and the Standard Accessories .....................................7
Figure 2 The BAROCAP® Pressure Sensor ............................................8
Figure 3 Different Mounting Options of the PTB210.................................9
Figure 4 Recommended Cable Position .................................................10
List of Tables
Table 1 Connections of the PTB210 Barometer with Analog Output ....11
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Chapter 1 _________________________________________________________ General Information
CHAPTER 1
GENERAL INFORMATION
Safety
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
NOTE
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 highlights important information on using the product.
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 e-mail: [email protected]
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Recycling
Recycle all applicable material.
Dispose of batteries and the unit according to statutory regulations.
Do not dispose of with regular household refuse.
Trademarks
BAROCAP ® is a registered trademark of Vaisala.
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.
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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 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 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 service 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 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.
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Chapter 2 _________________________________________________________ Product Description
CHAPTER 2
PRODUCT DESCRIPTION
The PTB210 series digital barometers are designed for various pressure ranges. The barometers with an analog output are available with different scalings between 500 ... 1100 hPa for 0 ... 5V or
0 ... 2.5V. The PTB210 series barometers are also available with a digital output.
The PTB210 series barometers offer an excellent solution for outdoor installations. They operate in a wide temperature range. The housing of the barometer electronics provides an IP65 standardized protection against sprayed water. The rugged corrosion-resistant housing in combination with the small size facilitates easy installation and a long lifetime for the barometer.
All the barometers are digitally adjusted and calibrated by using electronic working standards.
This manual gives the instructions for the use of PTB210 barometers with the analog output.
PTB210 barometer
Fixing screw (2 pcs)
Rail fastening clip
Pressure fitting
Attachment plate
Figure 1 PTB210 and the Standard Accessories
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The PTB210 barometers incorporate the BAROCAP ® silicon capacitive absolute pressure sensor developed by Vaisala. The sensor features excellent hysteresis and repeatability characteristics and has an outstanding temperature and long-term stability.
Silicon diaphragm
Thin film metallization
Silicon
Glass
Vacuum gap
Figure 2 The BAROCAP ® Pressure Sensor
The BAROCAP ® pressure sensor consists of two layers of single crystal silicon having a layer of glass between them. The thinner silicon layer creates an integrated vacuum reference chamber, and forms a pressure-sensitive silicon diaphragm. The thicker silicon layer is the rigid base plate of the sensor, and it is clad with a glass dielectric. Thin film metallization has been deposited to form a capacitor electrode inside the vacuum reference chamber. The other electrode is the pressure-sensitive silicon diaphragm.
Silicon
The coefficients of thermal expansion of silicon and glass materials used in the BAROCAP ® pressure sensor are carefully matched together to minimize the temperature dependence, and to maximize the long-term stability. The BAROCAP ® pressure sensor is designed to achieve zero temperature dependence at 1000 hPa, and its long-term stability has been maximized by thermal ageing at an elevated temperature.
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Chapter 3 ________________________________________________________________ Installation
CHAPTER 3
INSTALLATION
Mounting
Due to the compact design of the PTB210, all you need to do is to mount the instrument, and to connect the wires. Use one of the following three mounting options.
- Remove the pressure fitting, and place the barometer on a desired structure. Then, fix it with the slot headed screws, the O-ring sealing the attachment (A).
- Fix the supplied attachment plate to a desired place with a screw by using the hole on the vertical part of the plate. Then, attach the barometer on the plate with the screws supplied (B).
- The PTB210 can also be placed to a standard rail (DIN 35) by using the attachment plate and clip (B). Fasten the clip and barometer to the plate with the screws supplied. Finally, attach the clip to a suitable rail.
A B
NOTE
Figure 3 Different Mounting Options of the PTB210
Always place the barometer so that the pressure fitting is downwards.
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NOTE Check that the cable is not taken upwards from the barometer. This is to prevent water flowing along the cable, and gathering close to the feed-through.
Figure 4 Recommended Cable Position
The IP65-classified housing enables the barometer to be mounted outdoors without any additional protection. However, please take care that rainwater cannot plug the open pressure fitting. In such conditions, it is recommended to connect a piece of a tube with inner diameter of 4 mm or more to the fitting. It is also possible to use a static pressure head, SPH10/20, which protects the pressure channel from rain, and minimizes the effect of wind.
Static Pressure Head
Please note that the pressure fitting supplied with the transmitter is not a static pressure head, and that the transmitter cannot be used successfully as such in turbulent or high-speed static wind conditions.
In demanding wind conditions, it is recommended to use Vaisala's static pressure head, SPH10/20, to which the PTB210 digital barometers can be directly integrated. This combination provides for accurate measurement in all wind conditions.
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Chapter 3 ________________________________________________________________ Installation
Connections
Connect the wires of the PTB210 barometer according to Table 1. Use the pink wire for the supply voltage (8 ... 18 VDC), and the blue wire for grounding. The output signal is read from the white wire and grounded with the brown wire.
The gray and green wires are used to connect the barometer to PC when using the calibration Wizard software, or to Vaisala PMI20 digital barometer display. As a ground, use the blue wire.
If an external power control is used, its signal wire is connected to the yellow wire.
It is recommended to isolate the free wire ends.
Table 1 Connections of the PTB210 Barometer with Analog
Output
Wire color Signal
Grey RX
Green TX
Blue Ground
Pink Supply voltage (8 ... 18 VDC)
Brown V out
White V out
Yellow ground
External power control
(TTL level: 1 = off, 0 = on)
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Chapter 4 ___________________________________________________ Calibration and Adjustment
CHAPTER 4
CALIBRATION AND ADJUSTMENT
NOTE
The PTB210 series barometers can be fine adjusted and calibrated against pressure standards that have high accuracy and stability as well as known traceability to international standards. By comparing the output to a reference, the user can define the corrections required for readjustment.
Calibration is considered not to involve any adjustments.
It is advisable to write down the previous corrections so that they will not be lost by mistake.
The corrections are given by using the Wizard software; available for download at http://www.vaisala.com/PTB210Wizard/ . Finally, the barometer is calibrated to verify its real accuracy.
Wizard Software
The user-friendly Wizard software is designed to work in WIN3.X,
WIN95, and NT environment. The two-point pressure corrections for the PTB210 barometers are given through the serial line by using this program. The calibration date can also be changed using the Wizard.
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Operation
• To start the Wizard program in NT:
1. Double-click the My Computer icon.
2. Double-click the drive that contains the file.
OR
3. To start the program, double-click the WIZARD .
EXE -file.
• To start a program by using the Run command in NT
1. Click Start, and then click Run.
2. In the Open box, type the location and name of the program you want to start. Alternatively, browse the location, and choose the name of the program ( WIZARD .
EXE ). Then, click OK.
1. Choose the COM port in use from the file menu.
2. To open the connection click the Read PTB210-button.
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Chapter 4 ___________________________________________________ Calibration and Adjustment
NOTE
NOTE
3. Give reference pressure values and the corresponding corrections.
Calculate the corrections according to the equations below.
Because the lower end of voltage output is not exactly 0 V, use as lower calibration point a value approximately 40 mV above the lower end limit. Thus with scale 600…1060 hPa and 0…5V output the lowest calibration point will be 604 hPa.
P measured
= P min
+
U out
* ( P max
U out max
− P min
)
(1) corr new
= ( P reference
− P measured
) + corr previous
(2)
Example to calculate the higher end correction:
Barometer scale 600…1060 hPa with the 0…5V output.
- Output reading 4.8887 V
- P measured
= 600 + [4.8887 * (1060-600)]/5 = 1049.76 hPa
- Reference value 1050 hPa
- Previous correction 0.22 hPa
New correction (1050 - 1049.76) + 0.22 = 0.46 hPa
The previous corrections have to be added to the new ones (see the example above).
The correction at the lower end is calculated in similar way. The new calibration date can also be given.
The values are given in hPa: the reference value as whole number, and the correction with two decimals.
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Reference
Correction
4. To save the new corrections, click the Write PTB210-button.
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Chapter 4 ___________________________________________________ Calibration and Adjustment
5. The program then asks a password. As default, no password exists.
Just click OK. The password can be used to prevent saving of any new corrections without entering it. To give a password, click the
Change-button.
6. Enter a new password and confirm by re-entering it.
NOTE Remember to set the MPC corrections on after given them.
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Chapter 5 _____________________________________________________________ Technical Data
CHAPTER 5
TECHNICAL DATA
Technical Specifications
Operating Range
Pressure range (order specified)
Operating temperature range
Humidity range
500 ... 1100 hPa
800 ... 1060 hPa
600 ... 1060 hPa
900 ... 1100 hPa
-40 ... +60 °C non condensing
Accuracy
Non linearity*
Hysteresis*
Repeatability*
Calibration uncertainty**
Total accuracy (20 °C)***
Temperature dependence
± 0.20 hPa
± 0.05 hPa
± 0.05 hPa
± 0.15 hPa
± 0.30 hPa
(-40 ... +60 °C)****
Total accuracy***
± 0.50 hPa
(-40 ... +60 °C) ± 0.60 hPa
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Long term stability ± 0.10 hPa/year
* Defined as the ±2 standard deviation limits of end-point non-linearity, hysteresis error or repeatability error.
** Defined as ±2 standard deviation limits of inaccuracy of the working standard including traceability to NIST.
*** Defined as the root sum of the squares (RSS) of end-point non-linearity, hysteresis error, repeatability error and calibration uncertainty at room temperature.
**** Defined as ±2 standard deviation limits of temperature dependence over the operating temperature range.
General
Outputs (order specified) 0 ... 5 VDC
0 ... 2.5 VDC
Supply voltage 8 ... 18 VDC reverse polarity protected
Current consumption normal mode shutdown mode
< 8 mA
0.2 mA
Shutdown ON/OFF
Response time 500 ms
μV
Measurement rate
Load resistance
3 measurement/s
>10 kohm (to ground)
Max. pressure
Pressure connector
Pressure fitting
5 000 hPa abs.
M5 (10-32) internal thread barbed fitting for 1/8" I.D. tubing
Housing
electronics IP65
sensor
Housing material
Cable length
IP53
PC plastic
1, 2, 3, 5, or 10 m
Weight
Instrument
Cable
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Chapter 5 _____________________________________________________________ Technical Data
Electromagnetic Compatibility
Electromagnetic compatability EN61326-1:1997+ Am1:1998 +
Am2:2001 Generic environment
[CISPR16/22 class B, EN 61000-
4-2, EN 61000-4-3, EN 61000-4-4,
EN 61000-4-5, EN 61000-4-6]
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Dimensions in mm (inches)
50 (1.97)
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Chapter 5 _____________________________________________________________ Technical Data
2 (0.08)
50.40 (1.98)
14.20
(0.56)
4.50
(0.18)
M3
19
(0.75)
40
(1.57)
37 (1.46)
60 (2.36)
M3
14x45°
(0.55x45°)
ø15 (0.59)
50
(1.97)
21 (0.83)
M3
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*M210670EN*

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