PTU200 Transmitter. Measuring Barometric Pressure, Humidity and Temperature

Transcription

1 PTU200 Transmitter Measuring Barometric Pressure, Humidity and Temperature

2 Wide Variety of Applications GPS meteorology: estimating precipitable water vapor in the atmosphere Improving the accuracy of GPS coordinate measurements Environmental monitoring in calibration laboratories Meteorological applications Versatile Transmitter Measures pressure, relative humidity and temperature Two accuracy classes for pressure One or two barometric pressure sensors Two different humidity probes and one temperature probe available Optional local display and RS485 serial interface Practical outdoor mounting kit and tripod available THREE MEASUREMENT PARAMETERS IN ONE TRANSMITTER Vaisala s PTU200 Transmitter combines three measurement parameters: pressure, temperature, and humidity. This multi-purpose instrument is suitable for various applications. The user can select between two pressure accuracy classes. PTU200 can also be equipped with a second pressure transducer for added reliability. THREE DIFFERENT PROBES Three different kinds of probes can be used with the PTU200 Transmitter. Two of the probes are relative humidity and temperature probes and one is a temperature probe. The HMP45A-P relative humidity and temperature probe incorporates the HUMICAP 180 humidity sensor and the Pt1000 temperature sensor. The probe is supplied with a 20-meter connection cable, which can be shortened by the user if desired. The HMP45A-P Probe is attached to the PTU200 with an external connector. When the Pt100 sensor is preferred, the HMP45D humidity and temperature probe is recommended. The Pt100 is directly 4-wire connected to the temperature transducer inside the PTU200 housing. The fixed cable length is 3.5 metres. The PTU200 Transmitter with the HMP45A-P Probe. When humidity measurement is not required, the PTU200 can be supplied with a small, high stability wire-type Pt100 temperature probe. An RS232 serial interface comes as standard with all PTU200 Transmitters. The transmitter software is compatible with major GPS receivers and NMEA (National Marine Electronics Association) coded messages. The PTU200 Transmitter is also available with an optional local display and RS485 serial interface. SPECIFIC PRESSURE INFORMATION The PTU200 Transmitter can report both the measured pressure at the barometer level and the pressure reduced to a user selectable level. This makes it easy to differentiate the pressure calibration information from pressure readings related to e.g. GPS applications.

3 Practical Mounting Kit The PTU200 and the PTU200MIK installed on a GPS antenna site. CERTIFIED QUALITY All PTU200 Transmitters are delivered with a factory calibration certificate. The PTU200 transmitter uses the BAROCAP silicon capacitive absolute pressure sensor developed by Vaisala. This sensor has excellent hysteresis and repeatability characteristics and outstanding temperature and long-term stability. The PTU200TRIPOD equipped with the PTU200 and the PTU200MIK. PTU200 Transmitters with the HMP45D and the Pt100 probes. PTU200MIK OUTDOOR MOUNTING KIT For outdoor use of the PTU200 Transmitter, Vaisala offers a high-quality mounting kit, the PTU200MIK. It allows meteorological measurements to be made on site, e.g. next to a GPS antenna. The PTU200MIK includes a weatherproof box for the central unit of the PTU200 Transmitter. The configuration allows to include either one of the two alternative radiation shields (DTR13 or DTR502) for the humidity and temperature probes and a static pressure head SPH10 to minimize the wind-induced error in barometric pressure measurement. The installation site should be representative of the general atmospheric conditions, and the ground underneath must be suitable for relative humidity and temperature measurement. TRIPOD FOR THE PTU200MIK The PTU200TRIPOD is designed for use with the PTU200MIK outdoor mounting kit. This sturdy tripod ensures portability and quick system set-up. The humidity probes of the PTU200 Transmitter are fitted with the HUMICAP 180 Sensor. The sensor can be used in a wide range of environments. It has high accuracy, negligible hysteresis, and excellent long-term stability even at very high humidity levels. It is also insensitive to dust.

4 Technical Specifications BAROMETRIC PRESSURE Operating Range Pressure ranges hpa, hPa Accuracy hPa hpa class A class B Linearity * ±0.05 hpa ±0.10 hpa ±0.20 hpa Hysteresis * ±0.03 hpa ±0.03 hpa ±0.08 hpa Repeatability * ±0.03 hpa ±0.03 hpa ±0.08 hpa Calibration uncertainty ** ±0.07 hpa ±0.15 hpa ±0.20 hpa Accuracy at +20 C *** ±0.10 hpa ±0.20 hpa ±0.30 hpa Temperature dependence**** ±0.1 hpa ±0.1 hpa ±0.3 hpa Total accuracy ±0.15 hpa ±0.25 hpa ±0.45 hpa Long-term stability/year ± 0.1 hpa ± 0.1 hpa ±0.2 hpa Response time (100 % response) one sensor 2 seconds 1 second * Defined as the ±2 standard deviation limits of endpoint 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. HUMIDITY Measurement range Accuracy at +20 C (including non-linearity and hysteresis): against factory references field calibration against references %RH ±1 %RH ( %RH) ±2 %RH ( %RH) ±2 %RH ( %RH) ±3 %RH ( %RH) Typical long-term stability better than 1 %RH per year Temperature dependence ±0.05 %RH/ C Response time (90 %) at +20 C 15 s with membrane filter Humidity sensor HUMICAP 180 TEMPERATURE HMP45A-P & HMP45D probe Measurement range C (HMP45A-P) C (HMP45D) Accuracy at 20 C ±0.2 C Accuracy over the whole measurement range: C Temperature sensor HMP45A-P Pt 1000 IEC 751 1/3 Class B HMP45D Pt 100 IEC 751 1/3 Class B Pt100 sensor head Measurement range C Accuracy over the whole measurement range ±0.2 C Temperature sensor Pt 100 IEC 751 1/4 Class B GENERAL (factory settings are marked with a ) Temperature range operating C with local display C storage C with local display C Humidity range non-condensing Supply voltage VDC, reverse polarity protected Supply voltage sensitivity negligible Current consumption less than 30 ma with local display less than 30 ma (without backlight) less than 50 ma (with backlight) hardware shutdown mode less than 0.1 ma Serial I/O full duplex RS 232C or birectional TTL level or half-duplex two-wire RS 485/422 code ASCII parity even, odd, none data bits 7 or 8 stop bits 1 or 2

5 GENERAL continued Baud rates 300, 600, 1200, 2400, 4800, 9600 Units pressure hpa, kpa, Pa, mbar, inhg, mmhg, torr, mmh 2 O, psia humidity %RH temperature C, F Resolution 0.1 hpa, 0.1 %RH, 0.01 C Settling time at power-up class A class B one pressure sensor 6 seconds 5 seconds Acceleration sensitivity MECHANICS Transmitter body Pressure connector Pressure fitting Maximum pressure limit Minimum pressure limit Electrical connector Housing negligible M5 (10-32) internal thread barbed fitting for 1/8" I.D. tubing 5000 hpa abs. 0 hpa female 9-pin subd-connector epoxy painted aluminum HMP45A-P and HMP45D Housing ABS plastic Probe cable length HMP45A-P 20 m HMP45D 3.5 m Housing classification IP65 (NEMA 4) Sensor protection (standard) membrane filter, part no. 2787HM Pt100 Probe Probe cable length Weight PTU200 with HMP45A-P PTU200 with HMP45D PTU200 with Pt100 probe 2 m 2.3 kg 1.3 kg 1.1 kg ELECTROMAGNETIC COMPATIBILITY EN :1997+Am 1:1998, Electrical equipment for measurement, control and laboratory use - EMC requirements; Generic environment. ACCESSORIES PTU200MIK PTU200TRIPOD outdoor mounting kit tripod stand

6 Dimensions Dimensions in mm (inches): TRANSMITTER BODY 145 (5.71) 133 (5.24) ø6.5 (0.26) 120 (4.72) 104 (4.09) 120 (4.72) (5.49) 65 (2.56) 25.6 (1.01) HMP45A-P AND HMP45D PROBE A 240 (9.45) 118 (4.65) Removable probe head 24 Ø18.5 A-A 20.5 (0.81) 24 (0.94) A (0.94) (Ø0.72) PT100 SENSOR HEAD 64 (2.40) Ø3.1 (0.12) Ø6 (0.24) Ø5.5 (0.22) 93(3.66) BAROCAP and HUMICAP are registered trademarks of Vaisala. Specifications are subject to change without prior notice. Vaisala Oyj Head office: Vaisala Oyj P.O. Box 26 FIN Helsinki FINLAND Phone int.: Telefax: industrialsales@vaisala.com Business ID Vaisala Malmö Drottninggatan 1 D S Malmö SWEDEN Phone nat.: Telefax: Vaisala GmbH Pestalozzi Str. 8 D Stuttgart GERMANY Phone nat.: Phone int.: Telefax: Vaisala SA 2, rue Stéphenson (escalier 2 bis) F Saint-Quentin-en-Yvelines Cedex FRANCE Phone nat.: Telefax Vaisala (UK) Ltd Suffolk House, Fordham Rd Newmarket Suffolk CB8 7AA UNITED KINGDOM Phone int.: Telefax: Vaisala Inc. 100 Commerce Way Woburn, MA USA Phone int.: Telefax: Vaisala KK 42 Kagurazaka 6-chome Shinjuku-ku Tokyo JAPAN Phone int.: Telefax: Vaisala Pty Ltd 3 Guest Street Hawthorn. VIC 3122 AUSTRALIA Phone int.: Telefax: A.C.N Vaisala Beijing Representative Office Room 520, Wangfujing Hotel No. 57, Wangfujing Street Beijing PEOPLE S REPUBLIC OF CHINA Phone int: Telefax: Ref. B210231en