Input; Measured Variable; Measuring Range; Operable Flow Range - Endress+Hauser Proline Prosonic Flow 91W Technical Information

Measured variable

Measuring range

Operable flow range

Output signal

Signal on alarm

Load

Low flow cutoff

Galvanic isolation

6

Input

Flow velocity (differential delay proportional to flow velocity)
Typically v = 0 to 15 m/s (0 to 50 ft/s) at the specified measuring accuracy
Over 150 : 1

Output

Current output:
• Galvanically isolated
• Full scale value adjustable
• Temperature coefficient: typ. 2 μA/°C, resolution: 1.5 μA
< 700 (for HART: RL  250 )
• Active: 4 to 20 mA, R
L
Pulse/status output:
• Galvanically isolated
• Open collector
• 30 V DC / 250 mA
• Passive
• Can be configured as:
– Pulse output: pulse value and pulse polarity can be selected, max. pulse width adjustable (5 to 2000 ms),
pulse frequency max. 100 Hz
– Status output: for example, can be configured for error messages, empty pipe detection, flow recognition,
limit value
• Current output  failsafe mode selectable.
• Pulse/frequency output  failsafe mode selectable
See "Output signal"
Switching point for the low flow freely selectable.
All circuits for inputs, outputs, and power supply are galvanically isolated from each other.
Proline Prosonic Flow 91W
Endress+Hauser