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PTB330 Digital Barometer for Professional

Meteorology, Aviation, and Industrial Users

Vaisala BAROCAP

Digital Barometer

PTB330 is a new generation

barometer, designed for a wide

range of high-end atmospheric

pressure measurement. The pressure

measurement of the PTB330 is based

on the Vaisala in-house, silicon

Vaisala BAROCAP

Digital Barometer PTB330 with a new trend display.

capacitive, absolute pressure sensor

- the Vaisala BAROCAP

Sensor. It

provides high measurement accuracy

and excellent long-term stability.

Highly accurate

The PTB330 series is highly accurate.

The Class A barometers for the

most demanding applications are

ne-tuned and calibrated against a

high-precision pressure calibrator.

Class B barometers are adjusted and

calibrated using electronic working

standard. All the PTB330 barometers

come with a NIST traceable, factory

calibration certicate.

Reliability through

redundancy

According to customers’ choice, the

PTB330 can incorporate one, two

or three BAROCAP

sensors. When

two or three sensors are used, the

barometer continuously compares

the readings of the pressure sensors

Features/Beneﬁts

▪

Vaisala BAROCAP® sensor

▪

Accurate measurement

▪

Excellent long-term stability

▪

Added reliability through

redundancy

▪

Graphical trend display with

1-year history data

▪

Height and altitude corrected

pressure (QFE, QNH)

▪

For professional meteorology

and aviation, laboratories,

demanding industrial

applications

against one another and provides

information on whether these are

within the set internal difference

criteria. This unique feature

provides redundancy in pressure

measurement.

Thus, users also get a stable and

reliable pressure reading at all times

as well as a pre-indication of when to

service or recalibrate the barometer.

QNH and QFE

The PTB330 can be set to

compensate for QNH and QFE

pressure used especially in aviation.

The QNH represents the pressure

reduced to sea level, based on the

altitude and temperature of the

observation site. The QFE represents

the height corrected pressure of

small differences in altitude, for

example, the air pressure at the

aireld elevation.

Graphical display

The PTB330 features a multi-lingual,

graphical display allowing users to

monitor measurement trends. The

graph is updated automatically while

measuring and it provides a one-year

measurement history. In addition to

instant pressure, the PTB330 also

provides the WMO pressure trend

and tendency codes.

Applications

The PTB330 can be used successfully

for aviation, professional

meteorology, and for demanding

industrial pressure measurement

applications such as accurate laser

interferometric measurement and

exhaust gas analysis in engine test

benches.

Technical data

Performance

BAROMETRIC PRESSURE RANGE 500 ... 1100 hPa

Class A Class B

Linearity* ±0.05 hPa ±0.10 hPa

Hysteresis* ±0.03 hPa ±0.03 hPa

Repeatability* ±0.03 hPa ±0.03 hPa

Calibration uncertainty** ±0.07 hPa ±0.15 hPa

Accuracy at +20 °C (+68 °F) *** ±0.10 hPa ±0.20 hPa

BAROMETRIC PRESSURE RANGE 50 ... 1100 hPa

Class B

Linearity* ±0.20 hPa

Hysteresis* ±0.08 hPa

Repeatability* ±0.08 hPa

Calibration uncertainty** ±0.15 hPa

Accuracy at +20 °C *** ±0.20 hPa

TEMPERATURE DEPENDENCE****

500 ... 1100 hPa ±0.1 hPa

50 ... 1100 hPa ±0.3 hPa

TOTAL ACCURACY -40 ... +60 °C (-40 ... +140 °F)

Class A Class B

500 ... 1100 hPa ±0.15 hPa ±0.25 hPa

50 ... 1100 hPa ±0.45 hPa

LONG-TERM STABILITY

500 ... 1100 hPa ±0.1 hPa/year

50 ... 1100 hPa ±0.1 hPa/year

* Deﬁned as ±2 standard deviation limits of endpoint non-linearity,

hysteresis 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 endpoint

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.

Inputs and outputs

Supply voltage 10 ... 35 VDC

Supply voltage sensitivity negligible

Typical power consumption at +20 °C

24 VDC, one pressure sensor)

RS-232 25 mA

RS-485 40 mA

out

25 mA

out

40 mA

display and backlight +20 mA

Serial I/O RS232C, RS485/422

Pressure units hPa, mbar, kPa, Pa inHg, mmH

0, mmHg, torr, psia

Class A Class B

Resolution 0.01 hPa 0.1 hPa

Settling time at power-up (one sensor) 4 s 3 s

Response time (one sensor) 2 s 1 s

Acceleration sensitivity negligible

Pressure connector M5 (10-32) internal thread

Pressure ﬁtting barbed ﬁtting for 1/8” I.D. tubing or quick

connector with shutoff valve for 1/8” hose

Maximum pressure limit 5000 hPa abs.

Compliance EMC standard EN61326-1:1997 + Am1:1998 +

Am2:2001: Industrial Environment

Accessories

Serial interface cable 19446ZZ

USB-RJ45 serial connection cable 219685

Software interface kit 215005

Wall mounting kit 214829

Outdoor installation kit (weather shield) 215109

Installation kit for pole or pipeline 215108

Power supply module POWER-1

Temperature compensated analog output module AOUT-1T

Isolated RS-485 module RS485-1

Analog output (optional)

Current output 0 ... 20 mA, 4 ... 20 mA

Voltage output 0 ... 1 V, 0 ... 5 V, 0 ... 10 V

Accuracy at pressure range 500 ... 1100 hPa 50 ... 1100 hPa

at +20 °C ±0.30 hPa ±0.40 hPa

at -40 ... +60 °C ±0.60 hPa ±0.75 hPa

Mechanics

Housing material G AlSi10 Mg (DIN 1725)

Housing classiﬁcation IP66

Weight 1 - 1.5 kg

Operating environment

Pressure range 500 ... 1100 hPa, 50 ... 1100 hPa

Temperature range

operating -40 ... +60 °C (-40 ... +140 °F)

with local display 0 ... +60 °C (+32 ... +140 °F)

Data transfer software

MI70 Link Interface Software

Requirement: Microsoft

Windows OS

Microsoft

Excel

This material is subject to copyright protection, with all

copyrights retained by Vaisala and its individual partners. All

rights reserved. Any logos and/or product names are trademarks

of Vaisala or its individual partners. The reproduction, transfer,

distribution or storage of information contained in this brochure

in any form without the prior written consent of Vaisala is strictly

prohibited. All speciﬁcations — technical included — are subject

to change without notice.

For more information, visit

www.vaisala.com or contact

us at sales@vaisala.com

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