Daniel 3818 LNG Liquid Ultrasonic Meter Installation Manual

Section 3: Electrical installation

3-9000-771 Rev A

May 2012

 

 

 

Frequency or Digital Outputs (FODO 3) source

FO1A, DO1A, FO1B, DO1B, FO2A, DO2A, FO2B, DO2B

FO1A, DO1A, FO1B, DO1B, FO2A, DO2A, FO2B, DO2B

Frequency output 1A is based on frequency content (Actual - Uncorrected Flow Rate)

Frequency output 1B is based on frequency content and Frequency 1B Phase

Frequency output 2A is based on frequency content (Actual - Uncorrected Flow Rate)

Frequency output 2B is based on frequency content and Frequency 2B Phase

Digital output 1A is based on Digital output1A content (Frequency 1A Validity and Flow Direction)

Digital output 2A is based on Digital output2A content (Frequency 1A Validity and Flow Direction)

Digital output 2A is based on Digital output 2A content (Frequency 2A Validity and Flow Direction)

Digital output 2B is based on Digital output 2B content (Frequency 2B Validity and Flow Direction)

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 outputs, Phase B of the output is 90 degrees out of phase with Phase A.

Absolute - output reports flow in both directions. For frequency outputs, Phase B of the output is 90 degrees out of phase with Phase A.

Bidirectional - output reports flow on Phase A only in the forward direction and on Phase B only in the reverse direction.

Maximum frequency for the frequency outputs

1000Hz

5000Hz

Frequency/Digital outputs

49