User manual VAISALA PTB110

[. . . ] measures USER'S GUIDE INSTALLATION Vaisala BAROCAP® Barometer PTB110 Series The PTB110 barometer is intended to be installed indoors. Installing outdoors requires a protecting enclosure. A DIN rail mounting option enables the mounting of the barometer on a 35 mm wide standard DIN mounting rail. The barometer should be installed in a vertical position with the connectors pointing downwards to prevent accumulation of condensated water. ELECTRICAL CONNECTIONS The PTB110 barometer contains a screw terminal block located at the customer port. [. . . ] Inserting the Cover Place the short and solid side of the cover against the left edge of the metal plate. Ensure that the metal clamps slide into the hollows in the cover. Then press the cover against the metal plate until it clicks in place. ADJUSTMENT AND CALIBRATION Calibration of the PTB110 series barometers is NIST traceable and the barometers are supplied with a NIST traceable calibration certificate. There are two push buttons available for the offset fine adjustment inside the barometer (see the figure on the previous page). The adjustment step is 0. 05 hPa. OPERATING THE BUTTONS Restoring Adjustments To restore the adjustments, press and hold down the left button while switching on the barometer. After releasing the button, a green LED starts flashing. When the factory adjustments are in use, the green LED flashes twice. When the user adjustments are in use, the green LED flashes three times. Now you can change the factory adjustments to user adjustments or vice versa by pressing the left button. Return to the normal operating mode by switching the power off and on in sequence. Using Analog Output Test Mode To activate the test mode, press and hold down the right button while switching on the barometer. The function forces the voltage or frequency output to 50% of the scale. As an indication of the test mode, the red LED is lit. Return to the normal operating mode by switching the power off and on in sequence. Offset Correction To activate the offset correction mode, press and hold down both buttons switching on the barometer. Now you can adjust the offset correction upwards or downwards. Each time when pressing the left button, the offset goes down by one step (5 Pa), and the green LED flashes once. Each time when pressing the right button, the offset goes up by one step (5 Pa), and the red LED flashes once. Return to the normal operating mode by switching the power off and on in sequence. 2 READING THE OUTPUT The barometric pressure (P) can be calculated from the measured output voltage (Uout) using a simple equation. INNER STRUCTURE OF THE BAROMETER P = Plow + where: Plow Prange Urange Uout Prange U range U out = Lower limit of the pressure range [hPa] = Pressure full range [hPa] = Voltage full range [V] = Measured output voltage [V] 500. . . 1100 hPa 0. . . 5 V 4V Example Pressure range Voltage output Measured output voltage P = 500hPa + NOTE (1100 - 500)hPa 4V 5V = 980hPa The low end of the output voltage range of the barometer saturates at about 50 mV. In the frequency output 1 hPa equals 1 Hz. www. vaisala. com M210839EN-A Dimensions TECHNICAL DATA Operating range (1 hPa=1 mbar) Pressure ranges Description/Value 500. . . 1100 hPa 600. . . 1100 hPa 800. . . 1100 hPa 600. . . 1060 hPa 800. . . 1060 hPa -40. . . +60°C Non-condensing General Supply voltage Supply voltage control Supply voltage sensitivity Current consumption 10. . . 30 VDC With TTL level trigger Negligible Temperature range Humidity range Accuracy Linearity* Hysteresis* Repeatability* Calibration uncertainty** Accuracy at +20 °C*** Description/Value ±0. 25 hPa ±0. 03 hPa ±0. 03 hPa ±0. 15 hPa ±0. 3 hPa Notes * ** *** Description / Value Defined as ±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 endpoint non-linearity, hysteresis error, repeatability error and calibration uncertainty at room temperature Total accuracy +15. . . +25 °C 0. . . +40 °C -20. . . +45 °C -40. . . +60 °C Long-term stability ±0. 3 hPa ±0. 6 hPa ±1. 0 hPa ±1. 5 hPa ±0. 1 hPa/year Less than 4 mA Less than 1 µA in shutdown mode Output voltage 0. . . 2. 5 VDC 0. . . 5 VDC Output frequency 500. . . 1100 Hz Resolution 0. 1 hPa Load resistance 10 kohm minimum Load capacitance 47 nF maximum Settling time 1 s to reach full accuracy after powerup Response time 500 ms to reach full accuracy after a pressure step Acceleration sensitivity Negligible Pressure connector M5 (10-32) internal thread Pressure fitting Barbed fitting for 1/8" Minimum pressure limit 0 hPa abs Maximum pressure limit 2000 hPa abs Electrical connector A removable connector for five wires (AWG 28. . . 16) Terminals Pin 1: External triggering Pin 2: Signal ground Pin 3: Supply ground Pin 4: Supply voltage Pin 5: Supply output Housing material plastic ABS/PC blend cover Metal mounting plate AI Weight 90 g Housing classification IP 32 www. vaisala. com M210839EN-A 3 SAFETY PRECAUTIONS The PTB110 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. RECYCLING Recycle all applicable material. 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. [. . . ] 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 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. [. . . ]