FISCHER MS11 User manual

3.7.08 BA_GB_MS11.fm
1. Safety Instructions
1.1. General
This manual contains detailed
information about the product,
and instructions for its installati-
on, operation and maintenance.
Operators and other technical
personnel responsible for the equipment must
read this thoroughly before attempting to install or
operate this equipment. A copy of this manual
must always be kept accessible at the place of
work for reference by concerned personnel.
Chapter 1 (sections 1.2 through 1.7) contains ge-
neral as well as specific safety instructions. Chap-
ters 2 through 10, covering topics ranging from
intended purpose of the equipment to its final dis-
posal, also include important points relating to
safety. Overlooking or ignoring any of these safety
points can endanger humans and animals, and
possibly cause damage to other equipment.
1.2. Personnel Qualification
Personnel responsible for installation, operation,
maintenance and inspection of this product must
have the qualifications, training and experience
necessary to carry out such work on this type of
equipment.
1.3. Risks of Disregarding Safety Instruc-
tions
Disregarding safety instructions, use of this pro-
duct for purposes for which it is not intended, and/
or operation of this product outside the limits spe-
cified for any of its technical parameters, can result
in harm to persons, the environment, or the plant
on which it is installed. Fischer Mess- und Regel-
technik GmbH will not be responsible for conse-
quences in such circumstances.
1.4. Safety Instructions for Operators
Safety instructions for the proper use of this pro-
duct must be followed. This information must be
available at all times to by personnel responsible
for installation, operation, maintenance and in-
spection of this product. Adequate steps must be
taken to prevent the occurrence of hazardous con-
ditions that can be caused by electric energy and
the convertible energy of the process media. Such
conditions can, for example, be the result of impro-
per electrical or process connections. Detailed in-
formation is available in relevant published norms
(DIN EN, UVW in Germany; and equivalents in
other countries), industrial standards
such as DVWG, Ex-, GL-, VDE guide-
lines, as well as regulations of the local
authorities (e.g., EVUs in Germany).
Table of Contents
1. Safety Instructions
2. Intended Applications
3. Product Description and Functions
4. Installation
5. Commissioning
6. Maintenance
7. Transport
8. Service
9. Accessories
10. Disposal
11. Specifications
12. Dimensions
13. Ordering Code
14. CE-Certificate
Instruction Manual
MS11 Contact Pressure Gauge

2
1.5. Modifications Forbidden
Modification or other technical alteration of the product is
not permissible. This also applies to the use of unautho-
rized spare parts for repair / maintenance of the product.
Any modifications to this product, if and as necessary,
should be done only by Fischer Mess- und Regeltechnik
GmbH.
1.6. Operational Restrictions
The operational reliability of the product is guaranteed
only when used for intended purposes. The product must
be selected and configured for use specifically with defi-
ned process media. The limiting values of operating pa-
rameters, as given in the product specification sheet,
must never be crossed.
1.7. Safety Considerations during Installation and
Maintenance
The safety instructions given in this manual, existing na-
tional regulations relating to accident prevention, and the
internal safety rules and procedures of the user organi-
zation regarding safety during installation, operation and
servicing must all be followed meticulously.
It is the responsibility of the users to ensure that only sui-
tably qualified and experienced technical personnel are
used for installation, operation and servicing of this
equipment.
2. Intended Applications
The contact pressure gauge MS11 is a combined
measuring and switching instrument for usage in difficult
measuring conditions like pressure surges, vibrations,
frequent switching actions or high demands on breaking
capacity. The product must be used only for applications
and under conditions specified by Fischer Mess- und Re-
geltechnik GmbH.
Please confer with Fischer Mess- und Regeltechnik
GmbH prior to using this instrument along with polluted
or aggressive media. For use with this media it needs to
be adapted in every part with direct contact to the media.
3. Product Description and Functions
3.1. Schematic Diagram
3.2. Principles of Operation
This pressure instrument is based on a rugged and un-
complicated diaphragm movement, suitable for over-
pressure- and partial vacuum pressure measurements.
In non-operative state, forces of springs on both sides of
diaphragm are balanced. Pressure or differential pressu-
re to be measured creates an unbalanced force of
springs for measuring range until a new balance is rea-
ched. When subjected to excessive pressure, diaphragm
rests on metal supporting plates. A centre-mounted tap-
pet transfers motion of the diaphragm system to indicator
movement and operating elements of micro switches.
4. Installation
The instrument is intended for pipework mounting using
a pressure connection shank per DIN EN 837 by default.
Optional it can be wall-mounted by 3 fastening elements
casted on housing. The instrument is factory calibrated
while mounted upright, pressure port downward.
To ensure safety during installation and maintenance in-
tegrate adequate shut-off valves. By recommended ac-
cessories (see 9.) the instrument can be
• depressurized or shut down,
• cut off a plant to enable controlling or repairing,
• operational checked on site.
4.1. Process Connections
• Only qualified technicians authorized for this type of
work should undertake installation.
• Only for intended mechanical process connection
(for model information see ordering code on type pla-
te of instrument).
• Ensure that process equipment and pressure lines
are at atmospheric pressure before making pressure
connections.
• The instrument should be provided with suitable pro-
tection against pressure surges (e.g., snubber or pul-
sation damper).
• Ensure that the mechanical configuration and materi-
als of construction of the instrument are compatible
with the process media.
• Ensure that process pressure is always less than the
specified safe pressure rating.
4.2. Electrical Connections
• Only qualified technicians authorized for this type of
work should undertake installation.
• Switch off electrical power to the plant before attemp-
ting electrical installation work of any kind.
• Electrical connections must comply with relevant in-
ternational, national and local regulations and norms
relating to electrical and instrumentation installations.
1. Pressure chamber
2. Motion work
3. Tappet
4. Micro switches, opera-
ting elements
5. Measuring springs
6. Measuring diaphragm

3
• Make electrical connections to the instrument through
a suitable fuse.
5. Commissioning
Power supply and signal cabling to the instrument must
be correctly selected to meet operational requirements,
and installed in a way that does not cause physical stress
to the instrument.
• The pressure line must have a downward gradient
throughout, from the pressure instrument to the pro-
cess vessel / pipe. This is to prevent formation of air /
gas pockets (for liquid applications) and liquid plugs
(for air / gas applications). If this continuous down-
ward gradient cannot be provided for any reason,
then suitable water and / or air separation devices
must be inserted in the pressure line.
• The instrument and lines must be protected against
frost when used with water.
• The pressure line must be kept as short as possible
and must not have short bends to avoid measurement
errors induced by pressure line delays.
• Carefully check the pressure-tightness of pressure
connection before start-up.
5.1. Pressure Connection
Pressure connection must be installed in a way that does
not cause physical stress to the instrument.
5.2. Shock Pressure Moderation
During pulsating pressure on the plant mechanical wear
and disturbances in functional capability may occur. To
avoid this we recommend installing absorbers into the
pressure line.
For Liquid Media
For Gaseous Media
Capilliary reactive coil MZ400
5.3. Adjustment of Zero Point
• Vent pressure lines to atmosphere.
• Remove cover.
• Set measuring indicator to zero by zero point adjust-
ment screw (see 5.4.).
• Mount cover.
5.4. Location of Zero Point Adjustment Screw and
Setting of Switching Points
5.5. Setting of Switching Points
• Unscrew plugs from cover.
• Set desired switching points according to marks on
reference value scale by screwdriver. Achievable ac-
curacy: 5% FS. More exact settings can be achieved
by using accessories like testing manometer, ohm-
meter on site or ex factory.
• Screw plugs in.
5.6. Connection Diagram
needle valve be-
hind sealing cap
G¼
Adjustable attenuator valve
MZ41
During operating condition
adjust needle valve that
way, that the indicator fol-
lows changements of pres-
sure delayed.
Nullpunktkorrekturschraube
Schaltpunkteinstellung
setting of switching points
zero point adjustment screw
Switch 1 Switch 2

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6. Maintenance
The instrument is inherently maintenance-free.
However, to ensure reliable operation and maximize the
operating life of the instrument, it is recommended that
the instrument, its external electrical and process con-
nections, and external connected devices be regularly in-
spected, e.g.:
• Check the display.
• Check the switching output connections and external
devices that are connected to these.
• Check all pressure connections for leak-tightness.
• Check the integrity of all electrical connections of the
instruments.
Inspection and test schedules depend on operating and
site conditions. The operating manuals of other equip-
ment to which the transmitter is connected must be read
thoroughly to ensure that all of them work correctly when
connected together.
7. Transport
The product must be protected against shock and vibra-
tion during transport. It must therefore be properly pak-
ked, preferably in the original factory packaging,
whenever it is to be transported.
8. Service
Any defective devices or devices with missing parts
should be retourned to Fischer Mess- und Regeltechnik
GmbH. For quick service contact our service department.
Remaining medium in and on dismantled
measuring instruments may cause danger
to persons, environment and equipment.
Take reasonable precautions! Clean the
instrument thoroughly if necessary.
9. Accessories
• Accessory for manometer per datasheet MZ..., i.e.
manometer valve
• Wall mounting kit acc. to DIN 16281
• Panel installation kit DZ11
10. Disposal
Protect your environment!
Use the product in accordance with re-
levant regulations. Please be aware of
environmental consequences of dispo-
sal at the end of the product's life, and
take care accordingly.

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11. Specifications
General
Measuring range 0 ... 400 mbar up to 0 ... 25 bar (s. Ordering Code)
Nominal pressure 25 bar
Max. pressure overpressure proof to nominal pressure (all measuring ranges),
safe against negative pressure
Perm. ambient temperature -10 ... +70°C
Perm. media temperature 70°C
Degree of protection IP54 per DIN EN 60529
Mounting position vertical, pressure port downward (rear)
Accuracy ± 1.6% FS
Adjustment of zero point located in the dial
Measuring System
Measuring ranges ≤16 bar diaphragm measuring system, diaphragm of reinforced elastomere
Measuring range 0-25 bar diaphragm measuring system, diaphragm of DURATHERM©
Switching Points
Output contacts 1 or 2 micro switches, 1-pole changing contacts
Setting of switching points adjustable by reference value scale
smallest adjustable value: approx. 5% FS
Switching hysteresis approx. 2.5% of FS
Load / contact U~max. = 250 V AC
U=max. = 30 V DC
Imax. = 5 A
Imax.= 0.4 A
Pmax.= 250 VA
Pmax.=10 W
Electrical Connection prewired numbered cable, cable terminal box, 7-pole plug connection
Pressure Connection connection shank G½ B DIN EN 837
Materials
Pressure chamber aluminium GkAlSi10(Mg), varnished black
aluminium GkAlSi10(Mg) HART-COAT©
stainless steel 1.4305
Measuring diaphragm diaphragm and gaskets of NBR or Viton©
diaphragm of DURATHERM©Ni Cr Co-alloy
Materials, media stainless steel 1.4310, 1.4305
Materials, housing macrolon
Weight pressure chamber of Al = 1.2 kg, pressure chamber of 1.4305 = 3.5 kg
Approval type examination according to the rules of ’Germanischer Lloyd’ possible
CE marking according to applicable regulations
Mounting pipe mounting: connection shank per DIN EN 837
bottom or rear pressure connection
wall mounting: 3 fastening elements, bottom pressure connection
panel mounting: with front ring ø 132 mm, bottom or rear pressure connection
(accessory DZ11)

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12. Dimensions (all units in mm unless stated otherwise)
Electrical connections
MS11
Standard
rear connection
shank
connection shank
per DIN EN 837
M16x1.5 plastic
connection
M16x1.5 plastic
connection
connection shank
per DIN EN 837
M20x1.5
cable connection
cable terminal box
or 7-pole plug connection
panel cutout ø104
MS11 Panel mounting
MS11
Wall mounting

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13. Ordering Code
Contact Pressure Gauge MS11
Measuring Range
0 . . . 400 mbar ............................................................... > 8 3
0 . . . 0.6 bar ............................................................... > 0 1
0 . . . 1 bar ............................................................... > 0 2
0 . . . 1.6 bar ............................................................... > 0 3
0 . . . 2.5 bar ............................................................... > 0 4
0 . . . 4 bar ............................................................... > 0 5
0 . . . 6 bar ............................................................... > 0 6
0 . . . 10 bar ............................................................... > 0 7
0 . . . 16 bar ............................................................... > 0 8
0 . . . 25 bar ............................................................... > 0 9
-0.6 . . . 0 bar .............................................................. > 3 0
-1 . . . 0 bar .............................................................. > 3 1
-1 . . . +0.6 bar ............................................................ > 3 2
-1 . . . +1.5 bar ............................................................ > 3 3
-1 . . . +3 bar ............................................................ > 3 4
-1 . . . +5 bar ............................................................ > 3 5
-1 . . . +9 bar ............................................................. > 3 6
Membrane / Gasket
NBR NBR (all ranges up to 16 bar).............. > N
Viton®Viton® (all ranges up to 16 bar) ........... > V
DURATHERM®NBR (range 0-25 bar only) .................> D
DURATHERM®Viton®(range 0-25 bar only)................> E
Pressure Chamber
Aluminium................................................................................................. > A
Aluminium HART-COAT®......................................................................... > D
Chrome-nickel-steel 1.4305...................................................................... > W
Type
Bottom pressure connection G½ B..........................................................................> 0
Rear pressure connection G½ B .............................................................................> H
Wall mounting, pressure connection G½ B .............................................................> B
Front ring for panel mounting, bottom pressure connection G½ B..........................> G
Front ring for panel mounting, rear pressure connection G½ B...............................> L
Switching Elements
1 adjustable micro switch.................................................................................................> A
2 adjustable micro switch.................................................................................................> B
Electrical Connection
1 m numbered cable, prewired .............................................................................................> 1
2.5 m numbered cable, prewired .............................................................................................> 2
5 m numbered cable, prewired .............................................................................................> 5
Cable terminal box...................................................................................................................> K
7-pole plug connection ............................................................................................................> W
0

Technische Änderungen vorbehalten • Subject to change without notice • Changements techniques sous réserve
Fischer Mess- und Regeltechnik GmbH • Bielefelder Str. 37a • D-32107 Bad Salzuflen • Tel. [phone] • Fax [phone]
eMail: [email protected] • www.fischermesstechnik.de
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14. CE-Certificate