User manual VAISALA PTB210 ANALOG

[. . . ] 5 CHAPTER 2 PRODUCT DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 CHAPTER 3 INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Static Pressure Head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] The barometers with an analog output are available with different scalings between 500 . . . 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 VAISALA_________________________________________________________________________ 7 User's Guide _______________________________________________________________________ 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 Silicon 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. 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. 8 ____________________________________________________________________ M210670EN-B 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. [. . . ] +60°C)**** Total accuracy*** (-40 . . . +60°C) ± 0. 20 hPa ± 0. 05 hPa ± 0. 05 hPa ± 0. 15 hPa ± 0. 30 hPa ± 0. 50 hPa ± 0. 60 hPa VAISALA________________________________________________________________________ 19 User's Guide _______________________________________________________________________ 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. [. . . ]