SITRANS LH100 Catalog Sheet

© Siemens AG 2016
Pressure Measurement
Single-range transmitters for general applications
1
SITRANS LH100 Transmitter for hydrostatic level
■ Overview
■ Function
1
U
const.
5
U
I
p
EM
The pressure transmitter SITRANS LH100 is a submersible sensor for hydrostatic level measurement.
The pressure transmitter measures the liquid levels in tanks,
containers, channels and dams. The SITRANS LH100 pressure
transmitters are available for various measuring ranges and with
explosion protection as an option.
A junction box and a cable hanger are available as accessories
for simple installation.
■ Benefits
•
•
•
•
2
3
4
1 Sensor
2 Connection for auxiliary
power supply
3 Vent pipe with humidity filter
4 Protective conductor connection/
Equipotential bonding
5 Diaphragm
SITRANS LH100 pressure transmitter, mode of operation and connection
diagram
Compact design
Simple installation
Small error in measurement (0.3 %)
Degree of protection IP68
■ Application
SITRANS LH100 pressure transmitters are used in the following
branches, for example:
• Shipbuilding
• Water/waste water supply
• For use in unpressurized/open vessels and wells
On one side of the sensor (1), the diaphragm (5) is exposed to
the hydrostatic pressure which is proportional to the submersion
depth. This pressure is compared with atmospheric pressure.
Pressure compensation is carried out using the vent pipe (3) in
the connecting cable. The vent pipe is equipped with a humidity
filter which prevents the build-up of condenstation in the vent
pipe.
The hydrostatic pressure of the liquid column acts on the diaphragm of the sensor and transmits the pressure to the Wheatstone resistance bridge in the sensor.
The output voltage of the sensor is applied to the electronic circuit where it is converted into an output current of 4 to 20 mA.
The protective conductor connection/equipotential bonding (4)
is connected to the enclosure.
■ Design
The pressure transmitter has a built-in ceramic sensor which is
equipped with a Wheatstone resistance bridge.
These pressure transmitters are equipped with an electronic circuit fitted together with the sensor in a stainless steel housing. In
addition, the connecting cable contains a vent pipe which is
equipped with a humidity filter to prevent the build-up of condensation.
The diaphragm is protected against external influences by a
protective cap.
■ Integration
It is generally recommended that the connecting cable of the
SITRANS LH100 transmitter is connected to the junction box,
which can be ordered separately, and secured with the cable
hanger, also available separately. The junction box has to be installed near the measuring point.
If the medium is anything other than water, it is also necessary to
check compatibility with the specified materials of the transmitter.
The sensor, the electronics and the connecting cable are
housed in an enclosure with small dimensions.
Venting pipe
The pressure transmitter is temperature-compensated for a wide
temperature range.
To measuredvalue
processing
Junction box 7MF1572-8AA, open, schematic diagram
1/22
Siemens FI 01 · 2016
To transmitter
7MF1572
© Siemens AG 2016
Pressure Measurement
Single-range transmitters for general applications
SITRANS LH100 Transmitter for hydrostatic level
■ Technical specifications
Pressure transmitter SITRANS LH100 (submersible sensor)
Mode of operation
Measuring principle
piezo-resistive
Input
Measured variable
Hydrostatic level
Measuring range
• 0 ... 3 mH2O (0 ... 9 ftH2O)
Max. permissible operating pressure
• 1.5 bar (21.8 psi) (corresponds to
15 mH2O (45 ftH2O))
• 1.5 bar (21.8 psi) (corresponds to
15 mH2O (45 ftH2O))
• 1.5 bar (21.8 psi) (corresponds to
15 mH2O (45 ftH2O))
• 1.5 bar (21.8 psi) (corresponds to
15 mH2O (45 ftH2O))
• 3.0 bar (43.5 psi) (corresponds to
30 mH2O (90 ftH2O))
• 5.0 bar (72.5 psi) (corresponds to
50 mH2O (150 ftH2O))
• 1.5 bar
• 1.5 bar
• 1.5 bar
• 1.5 bar
• 3.0 bar
• 5.0 bar
• 0 ... 4 mH2O (0 ... 12 ftH2O)
• 0 ... 5 mH2O (0 ... 15 ftH2O)
• 0 ... 6 mH2O (0 ... 18 ftH2O)
• 0 ... 10 mH2O (0 ... 30 ftH2O)
• 0 ... 20 mH2O (0 ... 60 ftH2O)
•
•
•
•
•
•
0 ... 0.3 bar
0 ... 0.4 bar
0 ... 0.5 bar
0 ... 0.6 bar
0 ... 1 bar
0 ... 2 bar
Output
Measuring point setup, generally with junction box 7MF1572-8AA and
7MF1572-8AB cable hanger
Output signal
4 ... 20 mA
Measuring accuracy
According to IEC 60770-1
Error in measurement at limit setting 0.3% of full-scale value (typical)
including hysteresis and reproducibility
Measuring range
• 0 ... 3 mH2O
(0 ... 9 ftH2O bzw. 0 ... 0.3 bar)
0.5 % of full-scale value (typical)
• For all other measuring ranges
0.3 % of full-scale value (typical)
1.0% of full-scale value (maximum)
0.6% of full-scale value (maximum)
Influence of ambient temperature
Measuring range
• 3 mH2O (9 ftH2O or 0.3 bar)
• 4 ... 6 mH2O
(12 ... 18 ftH2O or 0.4…0.6 bar)
•  6 mH2O
(  18 ftH2O or  0.6 bar)
Zero and span
0.5 %/10 K of full-scale value
0.45 %/10 K of full-scale value
0.3 %/10 K of full-scale value
Long-term stability
Measuring range
• 3 mH2O (9 ftH2O or 0.3 bar)
• 4 ... 6 mH2O
(12 ... 18 ftH2O or 0.4…0.6 bar)
•  6 mH2O
(  18 ftH2O or  0.6 bar)
Zero and span
0.4 % of full-scale value/year
0.25% of full-scale value/year
0.2 % of full-scale value/year
Rated conditions
Ambient conditions
• Process temperature
• Storage temperature
Degree of protection according to
IEC 60529
-10 ... +80 °C (14 ... 176 °F)
-40 ... +80 °C (-40 ... +176 °F)
IP68
Siemens FI 01 · 2016
1/23
1
© Siemens AG 2016
Pressure Measurement
Single-range transmitters for general applications
1
SITRANS LH100 Transmitter for hydrostatic level
Design
Junction box
Weight
• Pressure transmitter
 0.2 kg (  0.44 lb)
• Cable; maximum cable length 100 m 0.025 kg/m ( 0.015 lb/ft)
(330 ft)
Design
Electrical connection
Cable with 3 conductors, vent pipe
and integrated humidity filter
Material
• Seal diaphragm
• Enclosure
• Gasket
Al2O3 ceramic, 96%
Stainless steel, mat. no. 1.4404/316L
FPM (standard)
• Connecting cable
EPDM (optional)
PE-HD (standard)
PE-LD (in the case of versions with
EPDM seal, suitable for drinking
water)
Application
Weight
0.2 kg (0.44 lb)
Electrical connection
2 x 3-way (28 to 18 AWG)
Cable entry
2 x Pg 9
Enclosure material
polycarbonate
Vent pipe for atmospheric pressure
Screw for cable strength cord
Rated conditions
Degree of protection according to
IEC 60529
Application
Terminal voltage on pressure transmit- 10 ... 33 V DC
ter UB
10 ... 30 V DC for transmitter with
intrinsic safety explosion protection
Design
Drinking water approval (ACS)
Applied for
Drinking water approval (WRAS)
1403525
EAC
№ TC RU C-DE.ГБ05.В.00732
OC НАНИО «ЦСВЭ»
Underwriters Laboratories (UL)
2014-11-17 - E344532
The transmitter is not subject to the
pressure equipment directive (PED
2014/68/EU)
Explosion protection
• Intrinsic safety "i"
- Marking
1/24
Siemens FI 01 · 2016
IECEx SEV 14.0003
SEV 14 ATEX 0109
II 1 G Ex ia IIC T4 Ga
IP65
Cable hanger
Auxiliary power
Certificates and approvals
for connecting the transmitter cable
for mounting the transmitter
Weight
0.16 kg (0.35 lb)
Material
Galvanized steel, polyamide
© Siemens AG 2016
Pressure Measurement
Single-range transmitters for general applications
SITRANS LH100 Transmitter for hydrostatic level
Selection and ordering data
Article No.
Order code
Pressure transmitter
SITRANS LH100 (submersible sensor)
7 MF 1 5 7 2 - 77A77 777
For measurement of the hydrostatic
level through submersion,
two-wire system, 4…20 mA, enclosure
material mat. no. 1.4404 (316L), measuring cell Al2O3 ceramic,
with permanently mounted PE cable
Article No.
Order code
Pressure transmitter
SITRANS LH100 (submersible sensor)
7 MF 1 5 7 2 - 77A77 777
For measurement of the hydrostatic
level through submersion,
two-wire system, 4…20 mA, enclosure
material mat. no. 1.4404 (316L), measuring cell Al2O3 ceramic,
with permanently mounted PE cable
Click on the Article No. for the online
configuration in the PIA Life Cycle
Portal.
Measuring range
0 ... 3 mH2O1)
0 ... 4 mH2O
0 ... 5 mH2O
0 ... 6 mH2O
0 ... 10 mH2O
0 ... 20 mH2O
Cable length
10 m
10 m
10 m
10 m
20 m
30 m
0 ... 9 ftH2O1)
0 ... 12 ftH2O
0 ... 15 ftH2O
0 ... 18 ftH2O
0 ... 30 ftH2O
0 ... 60 ftH2O
33 ft
33 ft
33 ft
33 ft
66 ft
98 ft
2C
2D
2E
2F
2H
2K
0 ... 0.3 bar1)
0 ... 0.4 bar
0 ... 0.5 bar
0 ... 0.6 bar
0 ... 1 bar
0 ... 2 bar
10 m
10 m
10 m
10 m
20 m
30 m
3C
3D
3E
3F
3H
3K
}
}
}
}
}
}
Sealing material between sensor and
enclosure
• FPM (Standard)
}
• EPDM (for drinking water applications)
1C
1D
1E
1F
1H
1K
9A
1
2
Explosion protection
• without
}
• With ATEX II1 G Ex ia IIC T4 Ga and }
IECEx Ex ia IIC T4 Ga
H. .
+
Y01
0
1
Additional versions
Order code
Quality Inspection Certificate (5-point
characteristic curve test) according to
IEC 60770-2, add "-Z" to article no. and
add order code.
C11
Indication of measuring range (only at
special cable lengths) in
"... to ... mH2O" or "... to ... ftH2O"
or "... to ... bar"
Y01
Accessories/spare parts
Special versions:
Measuring ranges for special versions
between
0 ... 3 mH2O and 0 ... 30 mH2O or
0 ... 9 ftH2O and 0 ... 100 ftH2O or
0 ... 0.3 bar and 0 ... 3 bar possible.
Special cable lenght/Special measuring range
Please add „-Z“ to Article No. and
specify Order code and plain text.
Note: Indication of measuring range
Y01 is always necessary.
Selection and ordering data
Article No.
Junction box
for connecting the transmitter cable
} 7MF1572-8AA
Cable hanger
for securing the pressure transmitter
} 7MF1572-8AB
Protective caps as spare parts
(10-pack)
} 7MF1572-8AD
Humidity filters as spare parts
(10-pack)
} 7MF1572-8AE
}Available ex stock
1) Approvals pending.
For evaluation of the maximum possible
cable length following data have to be
regarded:
Transmitter:
Ci = 0 µF, Li = 0 µH
Cable:
Ck = 0.19 nF per meter cable
Lk = 1.5 µH per meter cable
The maximum permitted data of the
transmitter’s power supply have to be
considered!
3 m (10 ft)
5 m (16 ft)
7 m (23 ft)
10 m (33 ft)
15 m (49 ft)
H1A
H1B
H1C
H1D
H1E
20 m (66 ft)
25 m (82 ft)
30 m (98 ft)
40 m (131 ft)
50 m (164 ft)
H1F
H1G
H1H
H1 J
H1K
60 m (198 ft)1)
70 m (231 ft)1)
80 m (264 ft)1)
90 m (297 ft)1)
100 m (330 ft)1)
H1L
H1M
H1N
H1P
H1Q
Siemens FI 01 · 2016
1/25
1
© Siemens AG 2016
Pressure Measurement
Single-range transmitters for general applications
SITRANS LH100 Transmitter for hydrostatic level
■ Dimensional drawings
■ More information
~116.3 (4.58)
2
1
3
Determination of the measuring range for media with a density of  1000 kg/m3 (medium  water)
Ø23.4
(0.92)
4
5
6
1
Cable, sheat Ø 4.8 (0.19) (black, PE)
2
- (green)
3
+ (brown)
4
Protective conductor connection/Equipotential bonding (white)
5
Vent pipe with humidity filter Ø 1 (0.04) (inner diameter)
6
Protective cap with 4 x Ø 2.5 (0.10) holes (black, PPE)
H
r
SITRANS LH100 pressure transmitter, dimensions in mm (inch)
52 (2.05)
37 (1.46)
17
(0.07)
30
(1.2)
3
1
Calculation of the measuring range:
p=xgxH
86 (3.39)
2
86 (3.39)
with:
 = density of medium
30
(1.2)
g = local acceleration due to gravity
17
(0.07)
64 (2.52)
1
Fastening hole
2
Vent valve
3
Cable gland Pg 9, cable diameter 4 ... 8 mm (0.16 ... 0.31)
H = maximum level
Example:
Medium: Diesel fuel,  = 850 kg/m3
Acceleration due to gravity: 9.81 m/s2
Start-of-scale: 0 m
Maximum level: 6.0 m
Cable length: 10 m
Calculation:
Junction box, dimensions in mm (inch)
p = 850 kg/m3 x 9.81 m/s2 x 6.0 m
19
(0.75)
p = 50 031 N/m2
p = 500 mbar
Transmitter to be ordered:
7MF1572-1FA11
Plus, if required, junction box 7MF1572-8AA and cable hanger
7MF1572-8AB
190 (7.5)
1
48 (1.9)
Cable hanger, dimensions in mm (inch)
1/26
Siemens FI 01 · 2016