Thermal meters require a fully developed flow profile as a prerequisite for correct flow measurement. For this reason, please note the following points when installing the device.
Observe the recommended inlet and outlet requirements. Good engineering practice is necessary for the associated pipe work and installation. Ensure correct alignment and orientation of the sensor. Take measures to reduce or avoid condensation (e.g. install a condensation trap, thermal insulation, etc.). The maximum permitted ambient temperatures and the medium temperature range must be observed. Install the transmitter in a shaded location or use a protective sun shield. For mechanical reasons, and in order to protect the pipe, it is advisable to support heavy sensors. No installation in where large vibration exists. No exposure in the environment containing a lot of corrosive gas. No sharing power supply with frequency converter, electric welding machine and other machines which can make power-line interference. If necessary, please add power conditioner for transmitter power supply The minimum recommendations for inlet and outlet runs (without flow conditioner) are: Flanged sensor 1 = Reduction, 2 = Expansion, 3 = 90° elbow or T-piece, 4 = 2 × 90° elbow, 5 = 2 × 90° elbow (3-dimensional), 6 = Control valve. Insertion sensor 1 = Reduction, 2 = Expansion, 3 = 90° elbow or T-piece, 4 = 2 × 90° elbow, 5 = 2 × 90° elbow (3-dimensional), 6 = Control valve or pressure regulator. A specially designed perforated plate flow conditioner can be installed if it is not possible to observe the inlet runs required. Extended reading: Gas mass flow controller working principle