36
RFT9739 Rack-Mount Transmitter Instruction Manual
Output Wiring
continued
Dual-channel frequency
output
The transmitter has a dual-channel, phase-shifted frequency output for
custody transfer applications. The dual-channel frequency is derived
from the frequency/pulse output, and represents the same flow rate as
the frequency/pulse output. Each dual-channel frequency is always half
the value of the frequency/pulse output. For example, if the
frequency/pulse output is 4,000 Hz, each dual-channel output is
2,000 Hz. The phase shift between channels is 90 degrees.
Use RFT9739 terminals CN2-Z10, CN2-Z12, and CN2-D26 for the dual-
channel frequency output. Terminal D26 serves as a common return for
the dual-channel frequency output, frequency/pulse output, control
output, and remote zero input. See Figure 5-11.
Figure 5-11. Dual-channel frequency output wiring
Host receiver
Example: Petrocount/IMS
Clip shield at
host receiver end
FREQ+A (Channel A signal line)
RETURN (ground)
RFT9739
output terminals
FREQ+B (Channel B signal line)
GND (ground)
90°
Содержание Fisher Rosemount RFT9739
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