Siemens SITRANS P 7MF4232 User manual

SITRANS P
Absolute pressure transmitter, DS series (Smart)
7MF4232
OperatingInstructions C79000-B5676-C92-01

SIPART, SITRANS, SIMATIC
are Siemens registered trademarks.
All other product or system names are (registered) trademarks of their respective owners and must be treated
accordingly.
Thereproduction,transmissionoruseofthisdocumentoritscontentsisnotpermittedwithoutexpresswrittenauthority.Offenderswillbeliable
for damages.
All rights created by the granting of patents or registration of a design are reserved.
Technical datasubjecttochangewithoutnotice

SITRANS P
Absolute pressure transmitter, DS series (Smart)
(from the pressure transmitter series)
7MF4232
Operating Instructions

7MF4232Operating Instructions
2C79000-B5676-C92-01

7MF4232 Operating Instructions
3
C79000-B5676-C92-01
Contents
Page
1 Technical Description 5..................................................
1.1 Range of Application 5....................................................
1.2 How it works 5...........................................................
1.3 Technical Data 7.........................................................
1.4 Ordering data 11..........................................................
1.5 Dimensions 13............................................................
2 Installation 14............................................................
2.1 Installation 14.............................................................
2.1.1 Fixing with a mounting bracket 14..................................
2.1.2 Turning the measuring cell in relation to the housing 15...............
2.2 Electrical connection 16....................................................
2.3 Installing the analog indicator 18.............................................
2.4 Turning the digital indicator 18...............................................
3 Commissioning 19.......................................................
4 Operation 21.............................................................
4.1 Operation with PC/Laptop 21................................................
4.2 Operating from a HARTR-Communicator 21...................................
4.3 Operation on the transmitter 23..............................................
4.3.1 General 23......................................................
4.3.2 Setting the start of scale and full scale with the cover closed without viewing
window and activated key disable 24...............................
4.3.3 Operation with visible digital display and deactivated key lock 27.......
4.3.3.1 Setting start of scale and full scale with a pressure source 27..........
4.3.3.2 Setting start of scale and full scale without pressure transmitter 28.....
4.3.3.3 Correction of zero point 29........................................
4.3.3.4 Setting electrical damping 30......................................
4.3.3.5 ”Loop check” function 30..........................................
4.3.3.6 Output current in error situations 30................................
4.3.3.7 Disable pushbuttons and/or functions 31............................
4.3.3.8 Select display (current, %, pressure) 31.............................
4.3.3.9 Select engineering units 31........................................
4.4 Write protection 32.........................................................
5 Maintenance 33..........................................................
6 Conformance Certificates 34..............................................

7MF4232Operating Instructions
4C79000-B5676-C92-01
.Note
These instructions do not purport to cover all details or variations in equipment, nor to
provide for every possible contingency that may arise during installation, operation or
maintenance.
Should further information be desired or should particular problems arise that are not
covered sufficiently for the Purchaser’s purposes, the matter should be referred to the local
Siemens Sales Office.
The contents of this instruction manual shall not become part of or modify any prior or
existing agreement, commitment or relationship. The Sales Contract contains the entire
obligations of Siemens. The warranty contained in the contract between the parties is the
sole warranty of Siemens. Any statements contained herein do not create new warranties
or modify the existing warranty.
!Warning
This equipment should only be installed and operated after qualified personnel have
ensured that suitable power supplies are available. These personnel must ensure that the
equipment is not subjected to any hazardous voltages during normal operation or when a
defect occurs in the system.
This equipment may be used under high pressure and with aggressive media. Improper
use of this equipment may therefore result in severe personal injury or extensive damage to
property.
The successful and safe operation of this equipment is dependent upon its proper handling,
installation, operation and maintenance.
Qualified person
For the purposes of this manual, a qualified person is one who is familiar with the installation, commission-
ing and operation of this equipment. In addition, the person must be:
.Trained and authorised to operate and service equipment/systems in accordance with established
safety practices relating to electrical circuits, high pressures and aggressive media.
.Trained in the proper care and use of protective equipment in accordance with established safety
practices.
.Trained in rendering first aid.

7MF4232 Operating Instructions
5
C79000-B5676-C92-01
1 Technical Description
1.1 Range of Application
The Smart version of the SITRANS P transmitter measures the absolute pressure of non-aggressive and
aggressive gases, steam and liquids.
Measuring spans between 8.3 mbar and 30 bar are possible. The output signal is a load-independent
direct current of 4 to 20 mA which is linearly proportional to the absolute pressure.
Transmitters with intrinsic safety and flame--proof enclosure protection type can be used in areas where
there is an explosion hazard (zone 1). The certificates of conformity satisfy the European standard
(CENELEC) the American standard (FM) or the Canadian standard (CSA).
The transmitters are available with various types of chemical seal for special applications, e.g. measuring
high viscous substances.
1.2 How it works
The pressure is transferred via the isolating diaphragm (2, fig. 1.1) and the liquid filling (3) to the silicon
absolute pressure sensor (4) and its measuring diaphragm distorted. Four doped piezo-resistors in bridge
circuit in the measuring diaphragm change their resistance as a result. This change in resistance causes
a bridge output voltage proportional to the input pressure which is transformed through a measuring
amplifier (11) in an analog-digital converter (12) into a digital signal. The measuring signal is evaluated
by a microcontroller (13), corrected with respect to linearity and temperature behavior and transformed
by a digital-analog converter (14) into the output current 4 to 20 mA.
The measuring cell-specific data and the data for parameterization of the transmitter are stored in a
non-volatile EEPROM.
The cable termination point and the electronics’ side are arranged opposite.
The transmitter is parameterized with a PC/laptop or HARTR-Communicator. The PC/laptop is
connected to the two-wire circuit via the HARTR-Modem. The signals necessary for communication
accordingtotheHARTRprotocol, Revision 5.1, are superimposed on the output current according to the
frequency shift keying method (FSK, Frequency Shift Keying).
The following parameters can be set or their current settings interrogated:
- Measuring point number
- Measuring point description
-Text
- Upper limit of output signal
- Measuring limit
- Transmitter design (e.g. materials)
- Measuring range *
- Engineering unit *
- Measured value in mA, % or engineering units *
- Damping *
- ”Loop check” function *
- Output current in the event of an error *
- Pushbutton and/or function disable *
In addition to the parameterization with a PC/laptop or HARTR-Communicator (see Figure 1.2) the start
of scale and full scale can be ”fixed” on the transmitter with three external pushbuttons; the parameters
marked with*can be set directly on the transmitter using the digital display without opening the housing.

7MF4232Operating Instructions
6C79000-B5676-C92-01
IAOutput current
UHAuxiliary power
peInput variable pressure
1 Process cover
2 Overload diaphragm
3 Filling liquid
4 Silicon absolute pressure sensor
11 Measuring amplifier
12 Analog-Digital converter
13 Microcontroller
14 Digital-Analog converter
15 Digital indicator
16 Analog indicator (option)
##
μC
Figure 1.1 SITRANS P absolute pressure transmitter, function diagram
SITRANS P
Transmitter
+
---
Auxiliary power
PC/Laptop
RS-232-C
HARTR-
Communicator
or
HARTR-
Modem
+
---
230 Ω
to 500 Ω
(230 Ωto 1100 Ωfor HartRcommunicator)
Figure 1.2 Communication between PC/Laptop or HARTR-Communicator and SITRANS P
transmitter

7MF4232 Operating Instructions
7
C79000-B5676-C92-01
1.3 Technical Data
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 _Cto60_C:
30 mbar(abs)
+60 _C to +100 _C:
30 mbar(abs) +20 mbar(abs) x()
Tem p. i n _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 Upp ≤0.2V(47to125Hz)
Noise Urms ≤1.2mV(0.5to10kHz)
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 Ipp ≤0.5 % of the maximum output current
1) adjustable with PC/Laptop or HART-Communicator; factory set 20.5 mA.

7MF4232Operating Instructions
8C79000-B5676-C92-01
Load R≤UH–11 V
0, 023 Ain Ω,
UH: auxiliary power in V
230 to 500 Ωfor communication with PC/Laptop
230 to 1100 Ωfor communication with ≥230 Ω
HARTR-Communicator
Electrical damping
variable time constant 0 to 100 s
Current sensor adjustable 3.6 mA to 22.8 mA
Permissible ambient temperature 1) -- 4 0 _Cto+85_C silicone oil
-- 2 0 _Cto+85_C inert filling liquid
Observe temperature class in hazardous locations!
Permissible medium temperature --40 _C to +100 _C silicone oil
-- 2 0 _C to +100 _C inert filling liquid
Permissible storage temperature --50 _Cto+85_C
Condensation permitted
Transmission behavior
Start of scale 0 bar, rising characteristic, silicone oil filling and isolating diaphragm made of stainless
steel. All data refer to the output span.
Measuring span ratio MSma
x
MS
r= MSmax = maximum span
MS = set span
Measurement error when calibrating fixed
point (including hysteresis and reproducibi-
lity)
≤0.1 % at r ≤10
≤0.2 % at r >10
Time constant T63 at 20 _C
(without electrical damping)
about 0.2 ms
Long-term drift ≤0.2 % every 12 months at max. span
Influence of the ambient temperature
at --10 _Cto+60_C≤(0.1 r+0.2) %
at --40 _Cto--10_C and
+60 _Cto+85_C
≤(0.1 r+0.15) % / 10 K
Influence of the auxiliary power ≤0.005 % per 1 V change in voltage
Influence of the installation position ≤0.05 mbar to 10_of deviation
Electromagnetic compatibility
Resistance to interference EN 50082-2 and NAMUR NE 21, May 1993
Spurous emission EN 50081-1
1) Note:
At temperatures below --20 _C the digital indicator may no longer be legible under some circumstances due to its inertia.

7MF4232 Operating Instructions
9
C79000-B5676-C92-01
Instrument design
Electrical connection Screw terminals or connector Han 7 D 1) 2)
For screw terminals cable inlet via
compression gland Pg 13.5 1) 2) or
female thread M20¢1.5 2) or
female thread 1/2-- 1 4 N P T
1) Not in flame--proof enclosure type of protection
2) Not in FM exp/CSA exp type of ignition protection
Type of protection according to EN 60529 IP65
Process connection Connecting shank G1/2according to DIN 16288
or
female thread 1/2-- 1 4 N P T o r
oval flange and connection pin of stainless steel,
fastening thread:
-7/16--20 UNF
-M10
Materials of the components that come
into contact with the medium
Connection pin stainless steel, material no. 1.4401
Overload diaphragm stainless steel, material no. 1.4404 or
Hastelloy C276, material no. 2.4819
Measuring cell filling silicone oil or inert filling liquid
Electronics housing low-copper die-cast aluminum GD--AISi 12,
polyester-based lacquer,
stainless steel rating plate
Mounting bracket (optional) steel, galvanized and yellow-passivated or stainless steel
Digital indicator Housing cover with or without viewing window accor-
ding to order, see also chapter 4.3.1, page 23
Analog indicator (optional) with linear scale 0 to 100 % or customer-specific scale
Weight about 1.5 kg (without options)
Explosion protection
according to DIN EN 50 014, DIN EN 50 018 and DIN EN 50 020 (CENELEC)
Intrinsic safety ”i”
Identification EEx ia IIC T4 or T5 or T6
Certificate of conformity PTB No. Ex-94.C.2090
Max. ambient temperature +85 _C in temperature class T4
+75 _C in temperature class T5
+60 _C in temperature class T6
Connection to certified intrinsically safe circuits with the maximum
values:
Uo=30V,I
k= 100 mA, P = 750 mW
Effective internal inductance Li≤0.6 mH
Effective internal capacitance Ci≤8nF

7MF4232Operating Instructions
10 C79000-B5676-C92-01
Flame--proof enclosure ”d”
Identification EEx d IIC T5 or T6
Certificate of conformity PTB No. Ex-94.C.1021
Max. ambient temperature +85 _C in temperature class T5
+75 _C in temperature class T6
Communication (PC/laptop or HARTR-Communicator with SITRANS P transmitter)
Load with connection of
HARTR-Modem 230 to 500 Ω
HARTR-Communicator 230 to 1100 Ω
Cable Shielded two--core: ≤3.0 km
Shielded multicore: ≤1.5 km
Protocol HARTR, Revision 5.1
PC/laptop requirements IBM--compatible
RAM ≥32 Mbyte
Hard disk at least 70 Mbyte
RS-232-C interface
VGA graphics
Software for PC/laptop Windows 95 or Windows NT 4.0 and SIMATIC PDM

7MF4232 Operating Instructions
11
C79000-B5676-C92-01
1.4 Ordering data
Name Order number
SITRANS P transmitter
for absolute pressure (from pressure transmitter series),
two-wire system, Smart version
7MF4232--jjjjj-- 1 jjj
Measuring cell filling Measuring cell cleaning
silicone oil
inert filling liquid 1) normal grease-free
1
3
Measuring span/max. overload
8.3 mbar to 250 mbar / 6 bar
43 mbar to 1300 mbar / 10 bar
160 mbar to 5000 mbar / 30 bar
1000 mbar to 30000 mbar / 100 bar
D
F
G
H
Material of the components that come into contact with the medium
Diaphragm Process connection
stainless steel
Hastelloy
Hastelloy
stainless steel
stainless steel
Hastelloy
A
B
C
Version with chemical seal Y
Process connection
Connecting shank G1/2A
Female thread 1/2-- 1 4 N P T
oval flange and connection pin made of stainless steel
fastening thread 7/16--20 UNF
oval flange and connection pin made of stainless steel
fastening thread M10
0
1
2
3
Material of the components that do not come into contact with the medium
(electronics housing)
die-cast aluminum
precision--cast stainless steel
0
3
Explosion protection
without explosion protection A
with explosion protection (CENELEC), ignition protection type
Intrinsic safety EEx ia
Pressure-proof housing EEx d2)
Intrinsic safety (EEx ia) and flame--proof enclosure (EEx d)2)
(in planning)
B
D
P
Use in zone 2 (TÜV) (in planning) E
with explosion protection (FM and CSA), ignition protection type intrinsic safety (is)
and explosion proof (ep)2) (in planning)
NC
Electrical connection/cable inlets
Compression gland Pg 13.5 not in connection with flame--proof enclosure
Compression gland M20 x 1.5
Compression gland 1/2-- 1 4 N P T
Han 7 D connector not in connection with flame--proof enclosure
A
B
C
D
Indicators
Standard version with housing cover without viewing window
(built-in digital indicator covered)
1
Housing cover with analog display
Scale 0 to 100 %, linear division
scale as specified (abbreviation Y20 necessary)
3
5
Housing cover with viewing window (built-in digital indicator visible) 6
1) Also for oxygen applications
2) without cable gland

7MF4232Operating Instructions
12 C79000-B5676-C92-01
Other versions
Suffix ”--Z” and code to order number.
Description Code
Transmitter with mounting bracket made of
steel
stainless steel
A01
A02
Han 7D connector (metal, gray)
Han 8U connector (instead of Han 7D)
A30
A31
Labeling of plates (instead of German)
English
French
Spanish
Italian
B11
B12
B13
B14
Manufacturer test certificate M according to
DIN 55 350, Part 18, and according to ISO 8402
C11
Acceptance certificate B according to
DIN 50 049/EN 10 204-3.1B
C12
Works certificate according to DIN 50 049-2.2/
EN 10 204-2.2
C14
Setting the upper limit of the output signal to 22 mA D05
Acidic gas version according to NACE (only in
connection with diaphragm of Hastelloy)
D07
IP 68 (not in connection with plug) D12
Use in zone 0 (standard instrument EEx ia) E02
four-wire connection on request
Additional data
Suffix ”--Z” and code to the order number, and specify in writing.
Description Code
Range to be set,
stateinplaintext:
Y01: ... to ... mbar, bar, kPa, MPa,... Y01
Measuring point number/description (max. 16 charac-
ters), state in plain text:
Y15: ............................... Y15
Measuring point text (max. 27 characters),
stateinplaintext:
Y16: ............................... Y16
Customer--specific scale for the analog indicator,
stateinplaintext:
Y20: ... to ... mbar, bar, kPa, MPa,...
Y20
Accessories
Description
Software SIMATIC PDM
HARTR-Modem Catalog MP17, Part 5
HARTR-Communicator Catalog MP17, Part 5
Spare parts and accessories Catalog MP17, Part 5

7MF4232 Operating Instructions
13
C79000-B5676-C92-01
1.5 Dimensions
1 Process connection 1/2--14 NPT or connection shank G 1/2A or oval flange with connection pin
3 Terminal side, analog indicator (optional)
4 electronics side, cover with viewing window
6 Rotation reference mark (see chapter 2.1.2, page 15)
7 Permissible range of rotation, hatched in the diagram (see chapter 2.1.2)
8 Locking screw (see chapter 2.1.2)
9 Safety angle for housing cover
(only for flame--proof enclosure, not illustrated in the drawing)
10 Blanking plug (only for Pg 13.5 and Han 7D)
11 Protective key cover
12 Electrical connection:
compression gland Pg 13.5 2) 3) or
female thread M20 x 1.53) or
female thread 1/2-- 1 4 N P T o r
Han 7D connector 2) 3)
1) take approx. 20 mm thread length into account additionally
2) not for flame--proof enclosure ignition protection type
3) not for protection type FM exp/CSA exp
Figure 1.3 SITRANS P pressure transmitter, dimensions

7MF4232Operating Instructions
14 C79000-B5676-C92-01
2 Installation
2.1 Installation
The transmitter can be installed above or below the pressure tapping point.
When measuring gases we recommend installing the transmitter above the pressure tapping point and
laying the pressure pipe with a constant downward gradient to the pressure tapping point so that
condensation which forms can drain into the main pipe and the measured value is not falsified.
When measuring liquids the transmitter should be installed below the pressure tapping point and the
pressure pipe should have a constant upward gradient so that entrapped gas can escape into the main
pipe.
The installation point should have good access, if possible in the vicinity of the measuring point and should
not be exposed to strong vibration. The permissible ambient temperature limits should not be exceeded.
The transmitter should be protected against direct heat.
The operating data must be compared with the values specified on the rating plate before installation.
The housing must be kept closed during assembly!
2.1.1 Fixing with a mounting bracket
The mounting bracket is fixed either:
Dto a wall or a mounting frame with two screws
or
Dwith a U--bolt to a horizontal or vertical mounting pipe
(Æ50 to 60 mm)
The transmitter is screwed to the mounting bracket with two screws (enclosed).
Figure 2.1 Fixing the SITRANS P transmitter with mounting bracket

7MF4232 Operating Instructions
15
C79000-B5676-C92-01
2.1.2 Turning the measuring cell in relation to the housing
If necessary, the electronics housing can be turned in relation to the measuring cell in the SITRANS P
transmitter to move the electronics side (with digital indicator) into view.
Only a limited rotation is permitted!
The range of rotation (7) is marked on the base of the electronics housing; there is a reference mark (6)
on the neck of the measuring cell which must stay within the marked area (7) when rotating.
DLoosen the locking screw (8)
DTurn the housing within the marked area
DTighten the locking screw
Figure 2.2 Turning the electronics housing in relation to the measuring cell

7MF4232Operating Instructions
16 C79000-B5676-C92-01
2.2 Electrical connection
!Warning
The pertinent regulations must be observed for electrical installation; particularly in hazard-
ous areas.
.the directive governing electrical systems in hazardous areas (Elex V)
.the regulation for installing electrical systems in hazardous areas (VDE 0165) and
.the certificate of conformity
Check whether the auxiliary power supply matches that specified on the rating plate.
The transmitter should be powered from a power source with SELV (safety extra-low voltage). If other
power sources are used, we recommend grounding the transmitter housing. The ground terminal on the
terminal side is connected with the external ground terminal.
.Note
DSealing caps in the cable inlets should be replaced by suitable compression glands or blank-
ing plugs which must be certified for transmitters with flame--proof enclosure protection
type!
DFor laying the connecting cable (max. 1.5 mm2cross section)/signal cable it generally
applies that:
- the signal cable should laid separately from cables with voltages >60 V
- use cables with twisted pairs
- avoid the vicinity of large electrical installations or use screened cables
- full specification according to HARTRRevision 5 only with screened cables
Dconnection to screw terminals
- Unscrew the housing cover of the terminal side (marked ”FIELD TERMINALS” on the housing)
- Pull out the analog indicator if necessary
- Insert the connecting cable through the compression gland
- Connect wires at the terminals ”+” and ”--”, pay attention to the polarity!
- Insert analog indicator if necessary
- Screw in housing cover
.Note
In transmitters for the protection type “flame-proof enclosure”, the housing cover must be
fastened with the safety angle.

7MF4232 Operating Instructions
17
C79000-B5676-C92-01
DConnection with plug (not for protection type “flame-proof enclosure”)
The contact parts for the connector are enclosed packed in a bag.
- Push sleeve and gland onto the cable
- Strip off cable ends about 8 mm
- Crimp or solder contact parts to the cable ends
- Assemble the connector
6
5
4
7
12
3
-- +
IA
UH
IAoutput current
UHauxiliary power
Figure 2.3 Connection with plug
+
---
Power supply
Test sockets for DC meter
or connection possibility for external indicator (M5-screws)
Terminal strip
Terminals
PC/Laptop
RS-232-C
HARTR-
Communicator
or
HARTR-
Modem
230 Ω
to 500 Ω
(230 Ωto 1100 Ωfor HartRcommunicator)
Figure 2.4 Electrical connection, schematic diagram
For error-free communication at least one load of 230 Ωmust be available in the signal circuit
(see Figure 2.4). When using power supply isolators for Smart transmitters, e.g. Siemens 7NG4021, a
load is already installed in the isolator (see Figure 2.5, page 18). The isolator with intrinsically safe input
circuit (transmitter circuit) is at the same time a safe isolation between the intrinsically safe and the not
intrinsically safe circuit. The HARTR-Modem or the HARTR-Communicator can be connected to the jacks
markedwithHK(seeFigure2.5).
!Warning
.The HARTR-Modem may not be used in hazardous areas and must not be connected
to intrinsically safe circuits.

7MF4232Operating Instructions
18 C79000-B5676-C92-01
Total of
230 to 500 Ω
HARTR-
Communicator
HARTR-Modem
or:
or:
+HK--
SITRANS P
transmitter
Hazardous
location
Non-hazardous lo-
cation
7NG4021
UH
Figure 2.5 Electrical connection with power supply isolator for Smart transmitter
2.3 Installing the analog indicator
- Unscrew the housing cover of the terminal side (marked ”FIELD TERMINALS” on the housing)
- Plug analog indicator into the test sockets
Depending on the operating position of the transmitter the analog indicator can be plugged in two
different positions (rotation by180_possible).
- Screw in casing cover with glass pane
2.4 Turning the digital indicator
- Unscrew housing cover of the electronics side
- Unscrew digital indicator
- Plug in the digital indicator
Depending on the operating position of the transmitter the digital indicator can be plugged in four
different positions (rotation by 90_or 180_possible).
- Screw on digital indicator
- Screw in housing cover