Technical Data; Input; Output; Power Supply - Endress+Hauser Flowphant T DTT31 Operating Instructions Manual

Technical data

11 Technical data
11.1

Input

11.1.1 Measured variable
• Flow velocity of liquid media (calorimetric measuring principle)
• Temperature (RTD), optionally for two switch outputs or additional analog output
11.1.2 Measuring range
Flow
Temperature
11.2

Output

11.2.1 Signal on alarm
Analog output: signal on alarm according to NAMUR NE43
Underranging
Overranging
Sensor breakage; sensor
short-circuit
Switch outputs
11.2.2 Switching capacity
DC voltage version:
Switch status ON
Switch status OFF
Switching cycles
Voltage drop PNP
Overload protection
11.3

Power supply

11.3.1 Supply voltage
DC voltage version: 18 to 30 V
38
0.03 to 3 m/s (0.1 to 9.84 ft/s), as relative value between 0 to 100%; maximum
display resolution: 1%
–20 to +85 °C (–4 to +185 °F); display resolution: 1 °C (1 °F)
Linear drop to 3.8 mA
Linear rise to 20.5 mA
≤3.6 mA or ≥ 21.0 mA (output 21.7 mA is guaranteed for setting ≥ 21.0 mA)
In the safe state (switch open)
Ia ≤ 250 mA
Ia ≤ 1 mA
> 10,000,000
≤2 V
Switching current checked automatically; switched off in event of overcurrent,
switching current checked again every 0.5 s; max. capacitive load: 14 µF for max.
supply voltage (without resistive load); periodic disconnection from a protective
circuit in event of overcurrent (f = 2 Hz) and "Warning" displayed
(reverse polarity protection)
DC
Flowphant T DTT31, DTT35
Endress+Hauser