Thermal mass flow meter HFM-D-305B

for gasin-linestainless steel

LINEAR BY DESIGN. The 300 Sériés is intrinsically linear. The output of the sensor has a non-linearity less than 1% typically before the curve fit. This minimizes the density driven errors that occur when gases other than the calibration gas are measured. CURVE FIT CORRECTION. The Digital 300 Sériés uses a curve fitting technique to remove any residual non-linearity from the system to improve the overall accuracy. This significantly improves the % of reading errors when flow rates are at a small fraction of the controller’s full scale flow. FLEXIBLE POWER REQUIREMENTS. The Digital 300 Sériés can operate with any power supply capable of providing 11 - 36 VDC between the high and low supply pins. Bipolar ±12 VDC, ±15 VDC or unipolar 24 VDC are ail acceptable. COLOR TOUCH PANEL DISPLAY. The Digital 300 Sériés has an optional integrated touch panel color LCD display. This gives the user easy configurability and local control over the instrument. DIGITAL COMMUNICATIONS. The Digital 300B Sériés is equipped with RS232, RS485 and USB for digital communications. The USB connector serves as a Virtual COM port for serial communication, eliminating the need for a USB to Serial converter. ANALOG EMULATION. The Digital 300 Sériés instrument can be set up to mimic an analog instrument. In this configuration the flow output is available as an analog signal and flow controllers will respond to analog commands. AUTO-ZERO. The Digital 300 Sériés of flow controllers can re-zero automatically. This feature is enabled by default at the factory. Auto-zeroing will occur whenever the command signal is set to zéro for 1 minute after flowing for 10 ten minutes. driven zéro shifts. 8.5 lb (3.9 kg)