Siemens 7MF4033 series User Manual page 178

UMSITRAPDS3-1
TABLE 9-16 Specifications, Absolute Pressure and Filling Level Models
Device type:
Application range
Function
Measurement principle
Input
Measurement variable
Measurement range
● Span (continuously adjustable)
Nominal pressure (PN) 470 psi
Nominal pressure (PN) 2325 psi
Nominal pressure (PN) 6174 psi
● Lower measurement limit
- Measuring cell with silicone oil filling
- Measuring cell with inert filling liquid
for process temp. -20 °C < ϑ < 60 °C
for process temp. +60 °C < ϑ < 100 °C
(max. +85°C for 485 psi meas. cell)
● Upper measurement limit
● Start of scale (continuously adjustable)
Output
Output signal
● Lower limit (continuously adjustable)
● Upper limit (continuously adjustable)
● Ripple (without HART communication)
● Electric damping
- adjustable time constants (T
● Current transmitter
● Failure signal
Load
● without HART communication
● with HART communication
Characteristic
Measuring accuracy
Reference conditions
Measurement error (limit point setting,
including hysteresis and repetitive accuracy)
● linear characteristic
r ≤ 10
10 < r ≤ 30
30 < r ≤ 100
● Repetitive accuracy
● Hysteresis
Transient time (T , without electrical damping)
63
Long-term drift over 12 months
November 2005
Pressure series 7MF4233
See Table 9-17
0.12 to 435 psia (4 ranges)
0.43 psi (abs) + 0.29 psi (abs) - (( ϑ - 60 °C) / °C)
+100% of maximum span; maximum 2325 psi in oxygen
measurement and inert filling liquid 2325 psi
) 0 to 100 seconds in steps of 0.1 seconds, factory set to 0.1 seconds
66
= 230 to 500 Ω (HART-Communicator) or R
R
B
Forward acting, zero based, process diaphragm stainless steel; For flange level flush mount,
silicone oil filling and room temperature 25°C
Absolute pressure
Diff. pressure series 7MF4333
See Table 9-20
Piezoresistive
Absolute pressure
0.12 to 2325 psia (5 ranges)
0 psi (absolute)
0.43 psi (absolute)
Between the measuring limits
4 to 20 mA
3.55 mA, factory set to 3.84 mA
23.0 mA, factory set to 20.5 mA or optionally 22.0 mA
Ipp ≤ 0.5% of maximum output current
Adjustable 3.55 to 23 mA
Adjustable 3.55 to 23 mA
≤ (U - 10.5V) / 0.023A in Ω , U
R
B H
Forward acting or reverse acting
r = maximum span / set span = span ratio
≤ 0.1%
≤ 0.2 %
Contained in measuring error
Contained in measuring error
About 0.2 seconds
≤ (0.2 · r) %
Model Designations and Specifications
Filling level
7MF4633 / 7MF4912
See Table 9-21
Filling level
2.9 to 72 psia (4 ranges)
-100% of max span or
0.43 psi (abs) depending
on remote seal
+100% of max span
: power supply in V
H
= 1100 Ω (HART-Communicator)
B
≤ 0.15 %
≤ 0.3 %
≤ (0.0075 · r + 0.075)%
≤ ( 0.1 · r) %
9-25