7MF4232
Operating Instructions
7
C79000-B5676-C92-01
1.3
Functional data
Measuring spans and overrange limits
Variable measuring spans
Overrange limits
8.3
to
250 mbar
≙
0.83
to
25 kPa
43
to
1300 mbar
≙
4.3
to
130 kPa
160
to
5000 mbar
≙
16
to
500 kPa
1000
to 30000 mbar
≙
100
to 3000 kPa
6 bar
10 bar
30 bar
100 bar
.
Note for the 250 mbar measuring cell:
This measuring cell is designed for operation within the measuring limits 0 mbar (abs) to
250 mbar (abs). When storing under normal ambient pressure of about 1000 mbar (abs)
the measuring cell is in the overload state. An overrange error may occur in this state. The
overrange error disappears when operating within the measuring limits. Then the
transmitter operates within its specification again; it may be necessary to readjust the start
of the measuring range.
In pressure measurements with repeated exceeding of the measuring limits (e.g. batch
processes with transitions between vacuum and ventilation) a measuring cell with a
maximum range of 1300 mbar should be selected to avoid overrange errors.
Lower measuring limit
Silicone oil filling
0 mbar (abs)
Inert filling liquid
--20
_
C to 60
_
C:
30 mbar(abs)
+60
_
C to +100
_
C:
30 mbar(abs) +20 mbar(abs) x
(
)
Temp. in
_
C --60
_
C
_
C
Upper measuring limit
0 and 100 % of the max. measuring span
Start of scale
anywhere between the measuring limits
Auxiliary power
Terminal voltage on the transmitter
11 to 45 V, DC
11 to 30 V DC in intrinisically safe operation
Ripple
U
pp
≤
0.2 V (47 to 125 Hz)
Noise
U
rms
≤
1.2 mV (0.5 to 10 kHz)
Output signal
4 to 20 mA
lower limit
3.84 mA
upper limit
20.5 to 22.0 mA
1)
in the event of an error
3.6 mA or 22.8 mA
ripple
I
pp
≤
0.5 % of the maximum output current
1)
adjustable with PC/Laptop or HART-Communicator; factory set 20.5 mA.
