Instruction manual

80 RFT9739 Field-Mount Transmitter Instruction Manual
RFT9739 Specifications
continued
Pressure compensation
The analog input can accept a signal from a pressure transmitter for
pressure compensation of flow and density. Range, 0-25 mA. Can be
used to power independent pressure or differential pressure transmitter.
Voltage sourcing capability, 15 V. Input impedance, 100 ohms.
Low-flow cutoff
Flow values below the low-flow cutoff cause digital and frequency
outputs to default to zero flow levels. Each mA output may be configured
for an additional low-flow cutoff.
Slug-flow limits
Transmitter senses density outside limits. Flow output remains at last
measured value, for a programmed time of 0 to 60 seconds, before
defaulting to zero flow.
Damping
Wide range of programmed filter time constants for damping on flow,
density, and temperature. Additional damping may be applied to mA
outputs.
Fault indication
Faults can be indicated by user-selected downscale (0-2 mA, 0 Hz) or
upscale (22-24 mA, 15-19 kHz) output levels. The control output can
also be configured to indicate a fault condition at 0 V.
Output testing
Output testing can be conducted with a HART Communicator, the
ProLink program, a Modbus host, or AMS software.
Current source
Transmitter can produce a user-specified current between 0 and 22 mA
on a 0-20 mA output, or between 2 and 22 mA on a 4-20 mA output.
Frequency source
Transmitter can produce a user-specified frequency between 0.1 and
15,000 Hz.
Local display (optional)
Display is a 2-line, 16-character, alphanumeric liquid crystal display
(LCD). Using the transmitter’s scroll function, the user can view flow rate,
density, temperature, mass and volume totals and inventory levels, and
status messages on the LCD. A reset button allows the user to reset the
transmitter’s flow totalizers and communication parameters, and perform
the flowmeter zeroing procedure.