Emerson Daniel 3818, Руководство по установке

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Table 1-2: Meter specifications
(continued)
Liquid meter specifications
Frequency/Digital Output(s) The meter has user-configurable selections for
either a Frequency Output or Digital status
(FODO) (Also see
Frequency/Digital outputs )
(3) Frequency/Digital Outputs
• FODO1 (four possible output configurations)
• FODO2 (eight possible output
configurations)
• FODO3 (eight possible output
configurations)
Frequency or Digital Output parameter pairs
(see
Frequency/Digital outputs )
Frequency or Digital Outputs (FODO 1) source
selections:
• (FO1A, DO1A, FO1B, DO1B)
Frequency or Digital Outputs (FODO 2) source
selections:
• (FO1A, DO1A, FO1B, DO1B, FO2A, DO2A,
FO2B, DO2B)
Frequency or Digital Outputs (FODO 3) source
selections:
• (FO1A, DO1A, FO1B, DO1B, FO2A, DO2A,
FO2B, DO2B)
Mode options:
• Open Collector (requires external excitation
supply voltage and pull-up resistor)
• TTL (internally powered by the meter 0-5
VDC signal)
Channel B Phase options:
• Lag forward, Lead reverse (Phase B lags
Phase A while reporting forward flow, leads
Phase A while reporting reverse flow)
• Lead forward, Lag reverse (Phase B leads
Phase A while reporting forward flow, lags
Phase A while reporting reverse flow)
Phase A and Phase B output (based on flow
direction):
• Reverse flow - output only reports flow in the
reverse direction. For frequency outputs,
Phase B of the output is 90 degrees out of
phase with Phase A.
• Forward flow - output only reports flow in
the forward direction. For frequency
Introduction Installation manual
May 2019 3-9000-771
22 3818 LNG Liquid Ultrasonic Meter