40
RFT9709 Transmitter Instruction Manual
RFT9709 Specifications
continued
Functional specifications
Outputs
Analog
Two independently configured analog outputs, designated as primary
and secondary, can represent mass flow rate, gross volume flow rate,
gross standard volume flow rate, density, or temperature. With a
pressure transmitter, can also provide indication for pressure or
viscosity. Internally powered 4-20 mA current outputs. Galvanically
isolated to ±50 VDC, 1000 ohm load limit. Out-of-range capability: 2-22
mA.
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 CMF sensors
2.5%
BASIS F sensors
10%
D, DT, and DL sensors
10%
D300, D600 sensors
5%
High-pressure (DH) sensors
20% typical
• Density
0.0 to 5.0 g/cc range limit
0.1 g/cc minimum span
• Temperature
–400 to 842°F (–240 to 450°C) range limit
36°F (20°C) minimum span
Frequency/pulse
One frequency/pulse output can be configured to indicate mass, mass
flow rate, gross volume flow rate, gross standard volume flow rate, or
gross standard volume, independent of analog outputs. Internally
powered, 0-23 V square wave, unloaded; 3.3 kohm impedance at 23 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.
Downscale or upscale fault indication: downscale (switch 7 off), output
goes to 0 Hz; upscale (switch 7 on), output goes to 15-19 kHz.
Control
One control output can represent flow direction, fault alarm, zero in
progress. Internally powered, digital level, 0 or 23 V, 3.3 kohm pull-up,
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.
09specs.fm Page 40 Tuesday, March 2, 1999 9:30 AM
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