Carrier-Frequency Pulse Amplifiers for ZHM...CT and LFM (VTE-C*Ex)



Carrier-frequency pulse amplifiers for gear flow meter in cartridge design and micro flow meter.

Specifications:

  • Supply voltage: UB: +9 up to 29 VDC
  • Quiescent current: IR < 4 mA
  • Frequency range: 1.5 up to 3,000 Hz according to flow meter
  • Ambient temperature: –20 up to +50°C
  • Output signal: open collector
  • Ex-protection: EX II 2 G EEx ia IIC T4/T5/T6

The integral carrier-frequency pickup of the VTE detects the r.p.m. of KEM flow meters. During this process the damping of a carrier-oscillator by the gears or blades is picked up through the meters body and evaluated.

The frequency of the resultant amplitude modulation of the carrier is equal to the number of revolutions of the wheel and therefore a standard for the flow rate

Here you can find our Evaluation Electronics.

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