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Daniel 3812 Liquid Ultrasonic Flow Meter Installation Manual Section 3: Electrical installation
3-9000-765 Rev D March 2013
Frequency/Digital outputs 57
Frequency or Digital Outputs (FODO 3) source
• FO1A, DO1A, FO1B, DO1B, FO2A, DO2A, FO2B, DO2B
• F
O1A, DO1A, FO1B, DO1B, FO2A, DO2A, FO2B, DO2B
• F
requency output 1A is based on frequency content (Actual - Uncorrected Flow Rate)
• F
requency output 1B is based on frequency content and Frequency 1B Phase
• F
requency output 2A is based on frequency content (Actual - Uncorrected Flow Rate)
• F
requency output 2B is based on frequency content and Frequency 2B Phase
• D
igital output 1A is based on Digital output1A content (Frequency 1A Validity and Flow
Direction)
• D
igital 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)
• D
igital 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)
• T
TL (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)
• L
ead 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.
• F
orward 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.
• A
bsolute - 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.