FISCHER DA30 User manual

14.3.11 BA_GB_DA30.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.
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. Declaration of Conformity
Instruction Manual
DA30 Differential Pressure Gauge

2
1.4. Safety Instructions for Operators
Safety instructions for the proper use of this product must
be followed. This information must be available at all
times to personnel responsible for installation, operation,
maintenance and inspection of this product. Adequate
steps must be taken to prevent the occurrence of hazar-
dous conditions that can be caused by electric energy
and the convertible energy of the process media. Such
conditions can, for example, be the result of improper
electrical or process connections. Detailed information is
available in relevant published norms (DIN EN, UVW in
Germany; and equivalents in other countries), industrial
standards such as DVWG, Ex-, GL-, VDE guidelines, as
well as regulations of the local authorities (e.g., EVUs in
Germany).
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 DA30 measures and indicates pressure and diffe-
rential pressure. It is suitable to work with gaseous and
liquid media not affecting the materials used. Electrical
andelectronicaccessory components(KE...)enablelimi-
ting of signal and transmitting of measurement.
The product must be used only for applications and un-
der conditions specified by the manufacturer.
3. Product Description and Functions
3.1. Schematic Diagram
3.2. Principles of Operation
The DA30 is based on a rugged and uncomplicated dia-
phragm movement, suitable for pressure and differential
pressure measurements.
Operating principle of system is identical for all applicati-
ons of this type. In a state of equilibrium,forces of springs
on both sides of the diaphragm are balanced. The pres-
sure or differential pressure to be measured creates an
unbalanced force of springs for the measuring range until
a new equilibrium is reached. When subjected to exces-
sive pressure, the diaphragm rests on metal supporting
plates. A centre-mounted torque rod transfers motion of
the diaphragm system by an eccentric tilted axle through
a torsional socket outwards.
The axle rotation is transmitted to the dial by a lever.
4. Installation
Types with inbuilt limit switches need matching connec-
tion to fixed cable connection to guarantee protection
class IP65. Its outer diameter needs to be between 7 and
13 mm.
The instrument is intended and factory adjusted for verti-
cal mounting (wall mounting), pressure ports downward.
When mounted in other orientation (max. ± 10W°) the
pointers’ zero position needs to be adjusted (see 5.2).
3
4
2
6
1
5
1
1 Measuring springs
2 Torsional socket
3 Dial
4 Lever
5 Diaphragm
6 Torque rod

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4.1. Process Connection
• Only qualified technicians authorized for this type of
work should undertake installation.
• 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 Connection
• Only qualified technicians authorized for this type of
work should undertake installation.
• Electrical connections must comply with relevant in-
ternational, national and local regulations and norms
relating to electrical and instrumentation installations.
• Switch off electrical power to the plant before attemp-
ting electrical installation work of any kind.
• Make electrical connections to the instrument through
a suitable fuse.
5. Commissioning
• Power supply, measurement lines 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.
• Pressure lines 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 into the pressure lines.
• Pressure lines must be kept as short as possible and
must not have short bends to avoid measurement er-
rors induced by pressure line delays.
• When used with liquid media the pressure lines must
be vented, for different heights in head of liquid in li-
nes cause measuring errors. The instrument and li-
nes must be protected against frost when used with
water.
• Carefully check the tightness of all pressure connec-
tions before start-up.
5.1. Pressure Connection
The instruments pressure ports are marked by "+" and
"-" symbols. For differential pressure applications the "+"
port must be connectedtothehigher pressure and the
"-" port should be connected to the lower pressure.
5.2. Zero Point Adjustment
The differential pressure gauge is factory adjusted there-
fore in normal case adjustment during installation is not
necessary.
• Equalize pressure in both chambers.
• Unmount screw plug.
• Use zero point adjustment screw to set the pointer to
zero.
• Mount screw plug.
5.2.1. Zero Point Adjustment Screw Position
5.2.2. Zero Point Adjustment Screw Position
(Filled Models)
Filled Models need to be vented before
commissioning by opening the air val-
ve on the upper side of instrument!
5.3. Setting of Switching Points
(only for models with contacts)
An adjustment lock is located in the instruments sight
glass. The switching contacts located on the setpoint va-
lue indicators can be adjusted to any point of scale by the
removable adjustment key.
For reasons of switching accuracy and products life span
switching points should be within range of 10% to 90% of
scale.
Verschlussschraube
Dichtscheibe
Nullpunkt-Korrekturschraube
Screw plug
Sealing disc
Zero point adjustment screw
Nullpunkt-
Dichtscheibe
Verschlussschraube
Korrekturschraube
Screw plug
Sealing disc Zero point
adjustment screw

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Adjustment Sequence:
• Attach adjustment key on axle of adjustment lock.
• Press axle inwards until the actuating arm interlocks
with the actuating pins.
• Turn adjustment key until setpoint value pointer rea-
ches the desired switching point.
• Release axle and remove adjustment key.
5.4. Connection Scheme / Contact Function
See connection scheme on instrument and datasheet Li-
mit Transducer KE... .
Contact Function:
Function 1: Contact closes when the pointer increments
clockwise.
Function 2: Contact opens when the pointer increments
clockwise.
Contact Assignment:
Contact 1 - setpoint value pointer on the left
Contact 2 - setpoint value pointer in the middle
Contact 3 - setpoint value pointer on the right
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 function in connection with exter-
nal devices.
• 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 instrument 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 pack-
ed, preferably in the original factory packaging,
whenever it is to be transported.
8. Service
Any defective devices or devices with missing parts
should be returned 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
N.A.
10. DisposalProtect 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.
Verstellschloss
Mitnehmerarm
Mitnehmerstift
Sollwertzeiger
Verstellschlüssel
Achse
Setpoint value
pointer
Actuating arm
Adjustment lock
Axle
Adjustment key
Actuating pin

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11. Specifications
Measuring ranges
Nominal pressure rating
Accuracy
Max. differential overpressure
Indicator
Max. ambient temperature
Max media temperature
Temperature coefficient
Zero adjustment
Protection class
Pressure connections
General
0...160 mbar to 0...1.6 bar (see Ordering Code)
50 bar (max. static pressure)
Measuring Range 0...100 mbar ± 2.5% FS
Measuring Range 0...160 mbar to 1.6bar ± 1,6% FS
One-sided overpressure protected up to nominal pressure,
on (+)- and (-)-side of diaphragm, partial vacuum protected
Circular dial type, 100 mm or 160 mm diameter
-20°C to +80°C
+80°C
Approx. 0.3% / 10°C
Screw through hole on top of dial housing. ± 25% FS.
IP 65, per DIN EN 60529
Female thread G¼,
diverse connenction shanks, cutting ring fittings (see Ordering Code)
Pressure chamber (wetted part)
Diaphragm (wetted part)
Dial mechanism, gauge housing
Dial window
Dial scale and pointer
Gaskets
Materials
Brass Cu Zn 40
EPDM
Chrome nickel steel 1.4301
Laminated safety glass
Aluminium
Viton®o-ring
Electrical accessories Options and Accessories Limit signalling contacts: slow-action / magnetic snap-action / non-contact
proximity type limit detector.
Pointer rotation transducer: capacitance type, with output signal
proportional to the pointer position (uses deeper gauge housing: see
Dimensions)
For details of electrical accessories, see Data Sheet KE.
Liquid filling For operating conditions involving vibration, pressure fluctuations, and/or
moisture condensation inside, the gauge can be supplied with glycerine or
silicone oil filling.
Reference pointer Adjustable pointer for visual marking of limit / reference value.
Options (on request) Special dial scales
Pressure connections Process pipe connection to be erected by using bite type ferrule connectors
or direct fitting of pipe into G½ F thread. Make sure that the connection is
firmly sealed.
Wall mounting Mounting With mounting plate on back of instrument

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12. Dimensions (all units in mm unless otherwise stated)
DA30 with bayonet ring case ø 100 mm DA30 with bayonet ring case ø 160 mm
Mounting plate view
Approx. 143
Approx. 141

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13. Ordering Code
Differential Pressure Gauge DA30
Measuring Range
0 . . . 100 mbar (on request)......................................> 8 0
0 . . . 160 mbar............................................................> 8 1
0 . . . 250 mbar............................................................> 8 2
0 . . . 400 mbar............................................................> 8 3
0 . . . 0.6 bar............................................................> 0 1
0 . . . 1 bar............................................................> 0 2
0 . . . 1.6 bar............................................................> 0 3
*)
Measuring Diaphragm / Gaskets
EPDM FKM.....................................................> A
Pressure Chamber
Brass........................................................................................................> M
Pressure Connection
Female thread G¼...........................................................................................> 0 1
Male connection shank G¼ B of brass............................................................> 0 6
Male connection shank G¼ B of chrome-nickel-steel......................................> 1 1
Cutting ring fitting of 1.4571 for 6 mm tube....................................................> 2 4
Cutting ring fitting of 1.4571 for 8 mm tube....................................................> 2 5
Cutting ring fitting of 1.4571 for 10 mm tube....................................................> 2 6
Cutting ring fitting of 1.4571 for 12 mm tube....................................................> 2 7
Cutting ring fitting of brass for 6 mm tube......................................................> 2 8
Cutting ring fitting of brass for 8 mm tube......................................................> 2 9
Cutting ring fitting of brass for 10 mm tube......................................................> 3 0
Dial Size
ø 100 mm ........................................................................................................................> L
ø 160 mm.........................................................................................................................> M
Mounting
Wall mounting..........................................................................................................................> W
Dial Liquid Filling
Without liquid filling..........................................................................................................................> 0
Dial with liquid filling: Glycerine .......................................................................................................> 1
Dial with liquid filling: Silikone oil .....................................................................................................> 5
Prepared for liquid filling ..................................................................................................................> 7
Additional Pointer
Without additional pointer....................................................................................................................... > 0
Adjustable reference pointer................................................................................................................... > 1
*) other ranges available on request
M 0W 0A

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. Declaration of Conformity