Cerabar M
16
Hauser
Dead time, time constant
(T63)
P01-xxxxxxxx-05-xx-xx-xx-007
Illustration of dead time and time constant
Dynamic behavior 4...20 mA
(Analog electronic)
Dead time, time constant (T63)
Dynamic behavior
current output
(HART electronic)
Dynamic behavior
digital output
(HART electronic)
Dead time, time constant (T63)
For HART communication, the dead time consists of the internal dead time of the device and the update rate
on the bus:
Reading cycle
HART commands: on average 3 to 4 per second on average.
Update rate
On average 250 to 330 ms.
I
63 %
100 %
t
t
1
t
2
90 %
T90
Types
Dead time t
1
Time constant (T63), t
2
Step response time (T90)
all
---
40 ms
80 ms
PMP46/PMP48
additional influence from the diaphragm seal
Types
Dead time t
1
Time constant (T63), t
2
all
290 ms
240 ms
PMP46/PMP48
additional influence from the diaphragm seal
Types
Dead time t
1
Time constant (T63), t
2
all
540 ms
240 ms
PMP46/PMP48
additional influence from the diaphragm seal
Содержание Cerabar M PMC41
Страница 83: ...Cerabar M Endress Hauser 83...