VEGA VEGABAR 81 4 … 20 mA_HART - Operating Instructions - Manual (Page 65)

65
11 Supplement
VEGABAR 81 • 4 … 20 mA/HART
45018-EN-131010
Damping (63 % of the input variable),
adjustable
0 … 999 s
HART output values according to HART 7 (default setting) 2)
Ʋ First HART value (PV) Linear percentage value
Ʋ Second HART value (SV) Physical unit of the application
Ʋ Third HART value (TV) Measuring cell temperature
Ʋ Fourth HART value (QV) Electronics temperature
Output variable - Second current output
For details on the operating voltage see chapter "Voltage supply"
Output signal
4 … 20 mA (passive)
Range of the output signal 3.8 … 20.5 mA (default setting)
Signal resolution 0.3 µA
Failure signal current output (adjustable) Last valid measured value, ≥ 21 mA, ≤ 3.6 mA
Max. output current
21.5 mA
Starting current ≤ 10 mA for 5 ms after switching on, ≤ 3.6 mA
Load Load resistor, see chapter "Voltage supply"
Damping (63 % of the input variable),
adjustable
0 … 999 s
Dynamic behaviour output
Run-up time approx.
10 s
90 %
100 %
10 %
t
t
T A
t
t
S
2 1
Fig. 42: Sudden change of the process variable. t
T
: dead time; t
A
: rise time; t
S
: jump response time
1 Process variable
2 Output signal
Dead time ≤ 45 ms
Rise time ≤ 35 ms (10 … 90 %)
Step response time ≤ 80 ms (ti: 0 s, 10 … 90 %)
Damping (63 % of the input variable) 0 … 999 s, adjustable
2) The output values can be assigned individually