Instruction manual

84 RFT9739 Rack-Mount Transmitter Instruction Manual
RFT9739 Specifications
continued
Functional specifications
Output signals Analog
Two independently configured analog outputs, designated as primary
and secondary, can represent mass or volumetric flow rate, density,
temperature, event 1 or event 2. With a pressure transmitter, can also
provide indication for pressure. Internally powered, can be selected as
4-20 mA or 0-20 mA current outputs. Outputs cannot be changed from
active to passive. Galvanically isolated to ±50 VDC, 1000 ohm load limit.
Out-of-range capability: 0-22 mA on 0-20 mA output; 3.8-20.5 mA on
4-20 mA output.
Milliamp (mA) output rangeability
Flow
Maximum span determined by sensor specifications.
Range limit determined by sensor maximum rate.
Minimum recommended span (% of nominal flow range):
ELITE sensors 2.5%
F-Series sensors 10%
D, DT, and DL sensors 10%
D300 and D600 sensors 5%
High-pressure (DH) sensors 20% typical
Density
Range limit 0 to 5 g/cc (0 to 5000 kg/m³)
Minimum span 0.05 g/cc (50 kg/m³)
Temperature
Range limit –400 to 842°F (–240 to 450°C)
Minimum span 36°F (20°C)
Frequency
One frequency/pulse output can be configured to indicate mass flow
rate, volumetric flow rate, mass total (inventory), or volume total
(inventory), independent of analog outputs. Internally powered, 0-15 V
square wave, unloaded; 2.2 kohm impedance at 15 V, galvanically
isolated to ±50 VDC. In open collector configuration: sinking capability,
0.1 amps in "on" condition (0 volt level), 30 VDC compliance in "off"
condition. Signal can be scaled up to 10,000 Hz. Out-of-range capability
to 15,000 Hz. Programmable pulse width for low frequencies.
Dual-channel frequency
Approved for custody transfer applications, a dual-channel frequency
output, referred to as frequency A and frequency B. Phase shift between
channels is 90 degrees. Output derived from the primary frequency, and
represents the same process variable as the frequency/pulse output, but
with half the frequency. All specifications match frequency/pulse output
except: Signal can be scaled up to 5,000 Hz; out-of-range capability to
7500 Hz. The output complies with VDE/VDI 2188 when jumper JP1 is
installed.