Endress+Hauser Deltabar S FMD77 - Dead Time, Time Constant; Dynamic Behavior: Current Output; Dynamic Behavior: Digital Output (HART Electronics)

Deltabar S
Endress+Hauser 11
Dead time, time constant
P01-xxxxxxxx-05-xx-xx-xx-036
Presentation of the dead time and the time constant
Dynamic behavior:
current output
Dynamic behavior: digital
output (HART electronics)
A typical burst rate of 300 ms results in the following behavior:
Reading cycle
• Acyclic: max. 3/s, typical 1/s (depends on command # and number of preambles)
I
63 %
100 %
t
t
1
t
2
90 %
t
3
Type Measuring cell Dead time (t
1
)
[ms]
Time constant T63 (t
2
) [ms] Time constant T90 (t
3
) [ms]
PMD75 max. • 10 mbar (0.15 psi) and 30 mbar (0.45 psi)
• 100 mbar (1.5 psi)
• 500 mbar (7.5 psi)
• 3 bar (45 psi)
• 16 bar (240 psi)
45 • 450
•60
•45
•40
•60
• 1040
• 138
• 104
• 92
• 138
PMD70,
FMD76
max. • 25 mbar (0.375 psi)
• 100 mbar (1.5 psi)
• 500 mbar (7.5 psi)
• 3 bar (45 psi)
90 • 4700
• 280
• 210
• 110
• 10810
• 644
• 483
• 253
FMD77,
FMD78
max. Dependent on the diaphragm seal
Type Measuring cell Dead time (t
1
) [ms] Dead time (t
1
) +
Time constant T63 (=t
2
) [ms]
Dead time (t
1
) +
Time constant T90 (=t
3
) [ms]
PMD75 min. • 10 mbar (0.15 psi) and 30 mbar (0.45 psi)
• 100 mbar (1.5 psi)
• 500 mbar (7.5 psi)
• 3 bar (45 psi)
• 16 bar (240 psi)
205 • 655
• 265
• 250
• 245
• 265
• 1200
• 298
• 264
• 252
• 298
max. • 10 mbar (0.15 psi) and 30 mbar (0.45 psi)
• 100 mbar (1.5 psi)
• 500 mbar (7.5 psi)
• 3 bar (45 psi)
• 16 bar (240 psi)
1005 • 1455
• 1065
• 1050
• 1045
• 1065
• 2000
• 1098
• 1064
• 1052
• 1098
PMD70,
FMD76
min. • 25 mbar (0.375 psi)
• 100 mbar (1.5 psi)
• 500 mbar (7.5 psi)
• 3 bar (45 psi)
250 • 4950
• 530
• 460
• 360
• 10970
• 804
• 643
• 413
PMD70,
FMD76
max. • 25 mbar (0.375 psi)
• 100 mbar (1.5 psi)
• 500 mbar (7.5 psi)
• 3 bar (45 psi)
1050 • 5750
• 1330
• 1260
• 1160
• 11770
• 1604
• 1443
• 1213
FMD77,
FMD78
max. Dependent on the diaphragm seal