Endress+Hauser Cerabar M PMC51 - Response Time T63 and T90

Cerabar M PMC51, PMP51, PMP55
Endress+Hauser 29
Response time T63 and T90 Dead time, time constant
Presentation of the dead time and the time constant:
I
63 %
100 %
t
t
1
t
2
90 %
t
3
A0019786
Dynamic behavior, current output (analog electronics)
Dead time (t
1
) Time constant T63 (= t
2
) Time constant T90 (= t
3
)
Max. 60 ms 40 ms 50 ms
Dynamic behavior, current output (HART electronics)
Dead time (t
1
) Time constant T63 (= t
2
) Time constant T90 (= t
3
)
Max. 50 ms 85 ms 200 ms
Dynamic behavior, digital output (HART electronics)
Dead time (t
1
) Dead time (t
1
) +
Time constant T63 (= t
2
)
Dead time (t
1
) +
Time constant T90 (= t
3
)
Min. 210 ms 295 ms 360 ms
Max. 1010 ms 1095 ms 1160 ms
Reading cycle
• Acyclic: max. 3/s, typical 1/s (depends on command # and number of preambles)
• Cyclic (burst): max. 3/s, typical 2/s
The device commands the BURST MODE function for cyclic value transmission via the HART
communication protocol.
Cycle time (update time)
Cyclic (burst): min. 300 ms