Siemens SITRANS 7MF1570, Operating Instructions Manual, Page: 23 / 78

SITRANS P, MPS Series
23
A5E00136035-04
Operating Instructions
9 Technical data
Input
Measuring range Overload limit
• 0 to 4 mH
2
O
• 0 to 6 mH
2
O
• 0 to 10 mH
2
O
• 0 to 20 mH
2
O
1.4 bar (20.3 psi) (= 14 mH
2
O/42 ftH
2
O)
Output
Accuracy
Error in measurement (including non-linearity, hysteresis and
repeatability, at 25 °C (77 °F))
0.2 % of full-scale value
Influence of ambient temperature
0.45 %/10 K (0.45 %/18 °F) of full-scale value/year
0.3 %/10 K (0.3 %/18 °F) of full-scale value/year
Long/term drift
0.25 % of full-scale value/year
0.2 % of full-scale value/year
Vibration effect (10 to 500 Hz in any axis) 0.05 %/g of full-scale value
Influence of power supply 0.01 %/V of full-scale value
Rated operating conditions
Ambient conditions
-10 to +80 °C (+14 to +176 °F)
-40 to +100 °C (-40 to +212 °F)
Degree of protection to DIN EN 60 529 IP68
Electromagnetic compatibility
To DIN EN 61 326, NAMUR NE 21
Design
Weight
• Transmitter
• Cable
Electrical connection
Cable with 2 conductors with screen and vent pipe,
strength cord (max. 300 N (67.7 lbf))
Material
Stainless steel, material no. 1.4571/316Ti
Stainless steel, material no. 1.4571/316Ti
Viton
PE/HFFR sheath (non-halogen)
Power supply
DC 10 to 36 V
Polarity reversal protection Yes
Overvoltage protection Yes
Load R
B
= ( U
B
- 10 V) / 0,02 A in
Ω
Certificates and approvals
Explosions protection
- Intrinsic safety "i" TÜV 03 ATEX 2004X
- Identification II 1G EEx ia IIC Tv
- Permissible ambient temperature -10 to +80 °C (14 to 176 °F)
- Connection to certified intrinsically-safe circuits with
maximum values U
i
= 30 V, l
i
= 100 mA, P
i
= 750 mW
- Effective internal inductance and capacitance depending on
length of cable L
i
= 165
µ
H + 1,5
µ
H/m, C
i
= 38,3 nF + 0,25 nF/m
Measured variable Pressure
• 0 to 2 mH
2
O
1.4 bar (20.3 psi) (= 14 mH
2
O/42 ftH
2
O)
3.0 bar (43.5 psi) (= 30 mH
2
O/90 ftH
2
O)
3.0 bar (43.5 psi) (= 30 mH
2
O/90 ftH
2
O)
6.0 bar (87.0 psi) (= 60 mH
2
O/180 ftH
2
O)
Output signal 4 to 20 mA
• Zero and span
- Between 1 and 6 mH
2
O (between 3 and 18 ftH
2
O)
-
≥
6 mH
2
O (
≥
18 ftH
2
O)
• Zero and span
- Between 1 and 6 mH
2
O (between 3 and 18 ftH
2
O)
-
≥
6 mH
2
O (
≥
18 ftH
2
O)
• Operating temperature
• Storage temperature
• Noise immunity
0.4 kg (0.88 lb)
0.08 kg/m (0.054 lb/ft)
• Sensor
• Housing
• O-ring
• Cable
Terminal voltage on transmitter U
B
The device is not subject to the pressurized equipment direc-
tive 97/23/EC
• Intrinsic safety version