Endress+Hauser Proline t-mass 65F - Page 26

10 Group CURRENT OUTPUT 1/2 Device Functions Proline t-mass 65
26 Endress+Hauser
Setting the span by means of
the 0_4 mA and 20 mA
value
The span for the measured variable selected in the ASSIGN CURRENT function is speci-
fied via the VALUE 0_4 mA and VALUE 20 mA functions.
The span is defined differently, depending on the measured variable selected:
MASS FLOW and CORRECTED VOLUME FLOW
• The VALUE 0_4 mA function is not available; the value for the zero flow is always set
to 0 kg/h; lb/h or 0 Nm
3
/h; Sm
3
/h by default.
• The flow value for the 20 mA current is defined in the VALUE 20 mA function, (input
range 00000 to 99999). The appropriate unit is taken from the UNIT MASS FLOW or
UNIT CORR. VOL. FLOW function.
Example:
4 mA assigned value = 0 kg/h
20 mA assigned value = 3000 kg/h
TEMPERATURE
• The temperature value for the 0/4 mA current is defined in the
VALUE 0_4 mA function, (input range –40 °C to +130 °C (–40 °F to +266 °F)).
The appropriate unit is taken from the UNIT TEMPERATURE function.
• The temperature value for the 20 mA current is defined in the
VALUE 20 mA function, (input range –40 °C to +130 °C (–40 °F to +266 °F)).
The appropriate unit is taken from the UNIT TEMPERATURE function.
Example:
4 mA assigned value = –5°C
20 mA assigned value = +20°C
Example:
A0001223
➀ = Initial value (0 to 20 mA)
➁ = Lower signal on alarm level:: depends on the setting in the function CURRENT SPAN
➂ = Initial value (4 to 20 mA): depends on the setting in the function CURRENT SPAN
➃ = Full scale value (0/4 to 20 mA): depends on the setting in the function CURRENT SPAN
➄ = Maximum current value: depends on the setting in the function CURRENT SPAN
➅ = Failsafe mode (upper signal on alarm level): depends on the setting in the functions CURRENT
SPAN and FAILSAFE MODE
A = Measuring range
TIME CONSTANT Use this function to enter a time constant defining how the current output signal reacts to
severely fluctuating measured variables, either very quickly (enter a low time constant) or
with damping (enter a high time constant).
User input:
Fixed-point number 0.0 to 100.0 s
Factory setting:
1.0 s
Function description CURRENT OUTPUT 1/2
0
3
4
5
6
I[mA]
2
A
1
Q