Filling in the gap in standardisation for measuring instruments: For absolute pressure gauges, DIN 16002 has now been published. The model 532.52 instrument family from WIKA conforms to this standard. All versions are already marked with the DIN 16002 inscription.
Previously, for mechanical pressure measuring instruments, a uniform standard was only available for gauge pressure gauges (EN 837). WIKA seized the initiative to introduce such a directive for absolute pressure gauges as well, and participated in its development as a member of the DIN committee.
The model 532.52 absolute pressure gauge has already been evaluated and marked in accordance with the new standard.
DIN 16002 describes the dimensions, metrology, requirements and testing of the instruments. An absolute pressure gauge features a measuring cell, which is typically separated by a diaphragm element. The upper part, the reference chamber, is evacuated. The measurement against the zero reference pressure (vacuum) generally takes place in the mbar range.
The demands on the quality of absolute pressure gauges, particularly on the long-term stability, are high. Thus, the materials selected for the reference chamber and the weld seam must not jeopardise the vacuum that exists within. WIKA therefore uses an extremely gas-tight material for the model 532.52.
The high demands correlate with the scope of testing which the new DIN has defined for the measuring instruments. This applies, for example, to the leakage rate of the reference and pressure chambers of the measuring cell, but also to the dynamic load: The pressure gauges must withstand up to 100,000 load cycles in order to be marked as being in accordance with DIN 16002.
Note
Further information on the model 532.52 instrument family can be found on the WIKA website. Additional information concerning DIN 16002 can be found on the website of the German Institute for standardization (Deutsches Institut für Normung – DIN).
