Ashcroft F5503 Instruction Manual

IM-F5503/F5503-HP/ATEX-EN-Rev D10/2019 Page 1 of 29
P/N 095I104-02EN
Installation and Maintenance
Instruction Manual
Differential pressure gauge, model F5503 and F5503-HP
for explosion risk areas pursuant to Directive 2014/34/EU (ATEX)
In the following configuration:
•###F5503###ATEX differential pressure gauge without switching contact
•###F5503###I####ATEX differential pressure gauge with inductive proximity switches
•###F5503-HP###ATEX differential pressure gauge high static pressure without switching
contact
•###F5503-HP###I####ATEX differential pressure gauge high static pressure with inductive
proximity switches

Page 2 of 29
Table of contents:
1General remarks.........................................................................................................................................................4
1.1 Purpose of this Manual........................................................................................................................................4
1.2 Symbols...............................................................................................................................................................4
1.3 Limits of liability ...................................................................................................................................................4
1.4 Copyright .............................................................................................................................................................4
1.5 Warranty..............................................................................................................................................................4
1.6 Manufacturer’s address, customer services........................................................................................................4
2Safety..........................................................................................................................................................................4
2.1 General sources of hazards ................................................................................................................................4
2.2 Use in accordance with intended purpose ..........................................................................................................4
2.3 Operator’s responsibility......................................................................................................................................5
2.4 Staff qualifications (target group assessment)....................................................................................................5
2.5 Signs/Safety markings.........................................................................................................................................5
2.6 Safety equipment ................................................................................................................................................5
2.7 Environmental protection.....................................................................................................................................5
3Use in explosion risk areas pursuant to Directive 2014/34/EU (ATEX) .....................................................................6
3.1 F5503 and F5503-HP without switching contact.................................................................................................6
3.2 F5503 I#### and F5503-HP I#### with inductive proximity switches SJ2-N .....................................................6
4Technical data ............................................................................................................................................................7
5Labeling on the device................................................................................................................................................8
5.1 Labeling on the device for explosion risk areas (ATEX) .....................................................................................8
6Construction and function...........................................................................................................................................9
6.1 Overview..............................................................................................................................................................9
6.2 Description of function.........................................................................................................................................9
6.1 Description of components..................................................................................................................................9
6.2 Accessories .........................................................................................................................................................9
7Transport ....................................................................................................................................................................9
7.1 Safety ..................................................................................................................................................................9
7.2 Transport inspection..........................................................................................................................................10
7.3 Storage..............................................................................................................................................................10
8Assembly/Installation................................................................................................................................................10
8.1 Safety ................................................................................................................................................................10
8.2 Preparations (requirements for the installation location)...................................................................................10
8.3 Mounting/Installation .........................................................................................................................................10
8.4 Starting up .........................................................................................................................................................11
8.5 Subsequent relocation of the gauge (by the customer) ....................................................................................12
9Servicing ...................................................................................................................................................................12
9.1 Safety ................................................................................................................................................................12
9.2 Check on function, and recalibration.................................................................................................................12
9.3 Cleaning and maintenance ...............................................................................................................................12
10 Faults ....................................................................................................................................................................13
10.1 Safety.............................................................................................................................................................13
10.2 Conduct in the event of faults ........................................................................................................................13

Page 3 of 29
10.3 Fault table ......................................................................................................................................................13
10.4 Conduct following fault rectification ...............................................................................................................13
11 Removal, disposal.................................................................................................................................................13
11.1 Safety.............................................................................................................................................................13
11.2 Removal.........................................................................................................................................................13
11.3 Disposal .........................................................................................................................................................13
12 Appendix ...............................................................................................................................................................14
12.1 Declaration of conformity model F5503 and F5503-HP ................................................................................14
12.2 Declaration of conformity model F5503 and F5503-HP with contacts ..........................................................16
12.3 EU design type test certification for inductive proximity switches of types SJ2-N ........................................18
12.4 Data sheet for differential pressure gauge F5503/F5503-HP .......................................................................29

Page 4 of 29
1 General remarks
1.1 Purpose of this Manual
This Operating Manual contains fundamental and essential advice to be followed for the installation, operation and
servicing of the device. It must be read without fail before assembly and start-up of the device by the fitter, the operator
and the specialist personnel responsible for the device. This Operating Manual must be available at the point of use at
all times.
The following sections about general safety information (2) and also the following specific advice regarding the intended
purposes (2.2) and through to disposal (11.3) contain important safety information which, if not followed, may result in
risks for people and animals, or to property and buildings.
1.2 Symbols
Warning!
This indicates a possibly hazardous situation where failing to follow advice may result in risks to people,
animals, the environment and buildings.
Information!
This emphasizes key information for efficient, fault-free operation.
1.3 Limits of liability
Failure to respect this safety information, the envisaged uses or the limit values relating to use indicated in the technical
data for the device may result in risk or to injury to people, the environment or the plant.
Claims for compensation for damage against the device supplier are excluded in such an eventuality.
1.4 Copyright
This Operating Manual may only be copied and passed on as a complete document without the special permission of
the publisher.
1.5 Warranty
For the product described here, we offer a warranty pursuant to Section 6 Guarantee in Respect of Defects in our
General Terms and Conditions of Delivery and Payment.
1.6 Manufacturer’s address, customer services
Ashcroft Instruments GmbH
Max-Planck-Strasse 1
D-52499 Baesweiler. Germany
Tel.: [phone]
Fax.: [phone]
E-mail: [e-mail]
Web: www.ashcroft.eu
2 Safety
2.1 General sources of hazards
Pressure gauges are pressurized parts where failure can result in hazardous situations. The selection of pressure gauge
should be made in accordance with the rules set out in EN 837-2 & DIN 16003.
2.2 Use in accordance with intended purpose
The devices are only to be used for the intended purpose as described by the manufacturer.
The devices are used for direct display of differential pressure.
The integrated switching elements are inductive proximity switches with a groove design, supplied by isolating switch
amplifiers with certified intrinsically safe power circuits. If the set limit values are exceeded, the output circuits are opened
or closed.
For each use scenario, the corresponding set-up regulations must be respected. If used in explosion risk areas, the
following conditions are to be respected for the individual finishes.

Page 5 of 29
2.3 Operator’s responsibility
Safety instructions for proper operation of the device must be respected. They are to be provided by the operator for
use by the respective personnel for installation, servicing, inspection and operation. Risks from electrical energy and
from the released energy of the medium, from escaping media and from improper connection of the device must be
eliminated. The details for this are to be found in the corresponding applicable set of regulations, such as DIN EN, UVV
(accident prevention regulations) and in sector-specific instances of use (DVWG, Ex-. GL, etc.) the VDE guidelines and
the regulations supplied by local utilities companies.
The device must be taken out of service and secured against inadvertently being restarted, if the presumption is that
risk-free operation is no longer possible (see Chapter 10: Faults).
Conversion works or other technical alterations to the device by the customer will violate the approval for
hazardous area and are not permitted. This also applies to installation of spare parts. Possible conversations or
alterations may only be carried out by the manufacturer.
The operational safety of the device is only guaranteed where it is used for its intended purpose. The specification of
the device must be adapted to the medium used in the plant. The limit values indicated in the technical data must not
be exceeded.
The safety information detailed in this Operating Manual, existing national regulations for accident prevention, and the
operator’s internal regulations regarding working, operations and safety must be respected.
The operator is responsible for all specified servicing, inspection and installation works being carried out by authorized
and qualified specialists.
The operator is responsible that the device is used in the correct ATEX zone.
2.4 Staff qualifications (target group assessment)
The device may only be installed and started up by specialist staff who are qualified for installation, start-up and operation
of the product.
Specialist staff are people who are able to assess the work assigned to them on the basis of their specialist training,
their knowledge and experience and their knowledge of the relevant standards, and can identify possible risks.
For devices in explosion-protected configuration, these staff must have been trained or instructed in, or be authorized
for, working on explosion-protected devices in potentially explosive plants.
2.5 Signs/Safety markings
The pressure gauge and its surrounding packaging carry markings. These markings show the article number,
measurement range and manufacturer. The pressure gauge can be provided with additional signs and safety markings
advising on special conditions:
Advice on the filling liquid
Advice on calibration
Ex (for ATEX configuration)
Oil-can deleted (if oxygen is used)
2.6 Safety equipment
This device is constructed with separate pressure chambers and case for display and can be considered as solid front
safety design. For a description, please refer to Chapter 6.2. The window uses multi-layer safety glass.
2.7 Environmental protection
This device may optionally contain a filling liquid (e.g. glycerin or silicone oil). The provisions set out in the REACH
regulation on production and use of chemicals are to be respected, and the relevant safety data sheets from the
manufacturers of the chemicals are available on our website for download.

Page 6 of 29
3 Use in explosion risk areas pursuant to Directive 2014/34/EU
(ATEX)
3.1 F5503 and F5503-HP without switching contact
Area of use:
Explosion risk areas Zone 1 and 2, and 21 and 22, risk from gases and dry dust
Permitted temperatures:
The maximum occurring surface temperature of 95 °C was determined with no covering of dust and with no safety
factor.
For dust clouds and dust layers the ignition temperature must be specified pursuant to ISO / IEC 80079-20-2
For dust clouds the maximum allowable medium temperature inside of the measuring instrument must not exceed 2/3
of the dust ignition temperature
For dust layer the maximum allowable medium temperature inside of the measuring instrument must be 75 K lower
than the dust ignition temperature
Permitted ambient temperature -20 °C to +60 °C.
Permitted medium temperature in the pressure gauge < 85 °C.
Permitted environment air with usual oxygen content (21 %), ambient pressure 80 kPa (0,8 bar) to 110 kPa (1,1 bar)
Warning! With gaseous media, the device temperature may increase due to compression heat. In such
cases, the rate of the pressure change must be regulated or the permitted temperature of the
measuring medium reduced.
Note:
For a change in differential pressure between 10 % and 90 % of the measuring range and a pulse frequency of <0.06 Hz,
the temperature increase is <10 K.
To avoid additional temperature increase, the devices should not be exposed to direct exposure to sunlight when in
operation!
For the non-electrical part of the devices, the, EN ISO 80079-36, EN ISO 80079-37, EN 60079-0 and EN 60079-31, are
applicable with regard to explosion protection. The relevant requirements of these standards are satisfied.
The documentation has been filed with TÜV-Nord-Cert NB 0044 (see declaration of conformity).
Labeling:
3.2 F5503 I#### and F5503-HP I#### with inductive proximity switches SJ2-N
Area of use:
Explosion risk areas Zone 1 and 2, and 21 and 22, risk from gases and dry dust.
Permitted temperatures:
The maximum occurring surface temperature of 95 °C was determined with no covering of dust and with no safety factor
For dust clouds and dust layers the ignition temperature must be specified pursuant to ISO / IEC 80079-20-2
For dust clouds the maximum allowable medium temperature inside of the measuring instrument must not exceed 2/3
of the dust ignition temperature
For dust layer the maximum allowable medium temperature inside of the measuring instrument must be 75K lower
than the dust ignition temperature.
Permitted ambient temperature -20 °C to +60 °C.
Permitted medium temperature in the pressure gauge < 85 °C.
Permitted environment air with usual oxygen content (21 %), ambient pressure 80 kPa (0,8 bar) to 110 kPa (1,1 bar)

Page 7 of 29
Warning! With gaseous media, the device temperature may increase due to compression heat. In such
cases, the rate of the pressure change must be regulated or the permitted temperature of the
measuring medium reduced.
Note:
For a change in differential pressure between 10 % and 90 % of the measuring range and a pulse frequency of <0.06 Hz,
the temperature increase is <10 K.
To avoid additional temperature increase, the devices should not be exposed to direct exposure to sunlight when in
operation!
EU design type test certification for the installed inductive proximity switches:
PTB 99 ATEX 2219X 4. supplement
The integrated proximity switch is indicated on the type label/wiring diagram.
The surrounding housing has protection class IP65 as per EN 60529.
For use in explosion risk areas, the devices must be connected to certify intrinsically safe power circuits:
Max. voltage Umax = 16 V
Max. current Imax = 25 mA
Max. power Pmax = 64 mW
Device data (per contact):
max. internal capacitance Ci max = 30 nF
max. internal inductance Li max = 100 μH
The permitted limit values for Ui, Iiand Pifor the intrinsically safe feed power circuits depend on the proximity switch
type. They are to be found in the respective EU design type test certifications.
For the non-electrical part of the devices, the standards, EN ISO 80079-36, EN ISO 80079-37, EN 60079-0 and
EN 60079-31 are applicable with regard to explosion protection. The relevant requirements of these standards are
satisfied.
The documentation for the mechanical part has been filed with TÜV-Nord-Cert NB 0044 (see declaration of conformity).
Labeling:
Recommended isolating switch devices:
MTL 5011B 1-channel, for contacts/inductive proximity switch, operating voltage 20-35 VDC
MTL 5015 2-channel, for contacts/inductive proximity switch, operating voltage 20-35 VDC
KFA6-SR2-Ex1.W 1-channel, for contacts/inductive proximity switch, operating voltage 230 VAC
KFA6-SR2-Ex2.W 2-channel, for contacts/inductive proximity switch, operating voltage 230 VAC
4 Technical data
The detailed technical information can be found in the documents in the Appendix, Chapter 12.

Page 8 of 29
5 Labeling on the device
The label with the serial number and type designation is located on the outside of the housing. The materials identifier
is encoded in the type designation.
5.1 Labeling on the device for explosion risk areas (ATEX)
The label with the marking for explosion risk areas is located on the outside of the housing.
Device without switching contacts:
###F5503####ATEX
Device with integrated inductive proximity switch:
###F5503#### I####ATEX
Device without switching contacts:
###F5503-HP####ATEX
Device with integrated inductive proximity switch:
###F5503-HP#### I####ATEX

Page 9 of 29
6 Construction and function
6.1 Overview
1. Connecting rod 2. O-Ring, differential overpressure protection
3. Sensing diaphragm 4. Movement
5. Lever 6. Link
7. Pressure transfer liquid
6.2 Description of function
The pressures to be compared act on flexible stainless steel diaphragms on either
side of the sensing capsule. The two diaphragms are mechanically linked by a rigid connecting rod. To compensate
high static pressures, the cavity between the two diaphragms is filled with hydraulic fluid. When pressures are equal on
both diaphragms, they are at zero position. When there is a difference in pressures acting on the two diaphragms, they
are deflected away from the high pressure side, towards the lower pressure side, causing a displacement of the
connecting rod.
A precision mechanism translates the linear displacement of the diaphragm connecting rod to angular movement of the
gauge's dial pointer. The pointer's displacement range of 270° corresponds to the full scale differential pressure. The
connecting rod has intermediate flanges on either side, which protects the diaphragms against excess differential
pressure.
When differential pressure exceeds the specified limit, the flange towards the lower pressure side is pressed against the
sealing O-ring on the inside of the sensing capsule. This action isolates the fluid adjacent to the diaphragm exposed to
lower pressure, from the fluid at higher pressure on the other side. This limits the pressure differential across the lower
pressure diaphragm, and equalizes the pressure across the higher pressure diaphragm. Thus both diaphragms are
protected against excess deflection and risks of rupturing. The model F5503-HP is designed for higher static pressure
than the F5503 with stronger pressure chambers and mounting parts.
6.1 Description of components
6.1.1 Scale with pointer
The differential pressure gauge is equipped with a dial face and pointer pursuant to DIN 16003, nominal size 100 mm
or 160 mm.
6.1.2 Instrument connection
The instrument connection is located on the underside of the differential pressure gauge and can be a threaded or
flanged similar to DIN EN 61518.
6.1.3 Vent and flushing connection
The vent and flushing connection of each pressure chamber is located on its top side. It is closed by a screwed in G ⅛
plug.
6.2 Accessories
Please contact the manufacturer regarding special tools and accessories.
7 Transport
7.1 Safety
The differential pressure gauge should be protected against the effects of knocks and impacts. The device should only
be transported in the packaging provided, to protect against glass breakage. The device should only be transported in
a clean condition (free of residues of measuring media).

Page 10 of 29
7.2 Transport inspection
The delivery must be checked for completeness and damage during transport. In the event of damage during transport,
the delivery must not be accepted, or only accepted subject to reservation of the scope of the damage being recorded
and, if necessary, a complaint initiated.
7.3 Storage
The differential pressure gauge must be stored in dry, clean conditions, within a temperature range of -40 to +70 °C,
protected against direct exposure to sunlight and protected against impact damage.
8 Assembly/Installation
8.1 Safety
To ensure safe working during installation and servicing, suitable shut-off valves must be installed in the plant (see 6.2
Accessories), enabling the device:
To be depressurized or taken out of operation;
To be disconnected from the mains supply for repair or checks within the relevant plant;
Or to enable function tests of the device to be performed “on site”.
During the works to mount/install the gauge, the plant must be protected against being switched back on.
8.2 Preparations (requirements for the installation location)
A check on suitability of the device for the medium to be measured, the scope of the measurement range and of the
protection against special conditions such as vibrations, pulsations and pressure spikes.
A bracket must be installed to support the pressure gauge if the metering pipe is not able to provide adequate
support.
The installation location should be chosen such that the work-spaces for operating personnel are not located to the
rear of the pressure gauge.
8.3 Mounting/Installation
8.3.1 Process connection
The instrument is intended and factory adjusted for vertical mounting, pressure ports downward. When mounted
in other orientation (max. ± 10°) the pointers’ zero position needs to be adjusted (see 8.4.1 Zero point adjustment).
Connection to be undertaken by authorized and qualified specialist staff only.
Use only with the mechanical process connection provided – regarding the configuration, see order code on the
device type label, with a matching threaded seal.
When connecting the device, the pipes must be depressurized.
The pressure metering pipe must be laid inclined in such a way that, for example, for measurements of fluids no air
pockets can form, and for measurements of gases no water pockets. If the necessary incline is not achieved, then
at suitable points water separators or air separators must be installed.
The pressure metering pipe must be kept as short as possible and laid without sharp bends, to avoid the occurrence
of irritating delays.
The instruments pressure ports are marked by "+" and "-" symbols:
"+" port must be connected to the higher pressure
"-" port must be connected to the lower pressure.
With liquid measurement media, the pressurized connection pipe must be degassed, since any gas bubble
inclusions result in measurement error.
If water is used as the measurement medium, the device must be frost-protected.
Safety notice: Only mount using the correct open-jawed wrench, and do not twist the device itself.

Page 11 of 29
8.3.2 Electrical connection
Take note of the electrical data in the EU design type test certification and the locally-applicable regulations
and guidelines for installing and operating electrical plant in explosion risk areas (e.g. EN 60079-14,
EN 60079-17 etc.).
Connection to be undertaken by authorized and qualified specialist staff only.
The electrical connection of the device is to be undertaken in accordance with the relevant regulations of the VDE
and the regulations supplied by the local utilities company.
Disconnect the plant from the mains supply before wiring electrical connections.
Install appropriate fuses upstream.
Differential pressure gauges with ATEX approval are equipped with a grounding screw, the grounding must be
proper connected.
Please refer to type label
for configuration of
connections.
8.4 Starting up
The precondition for start-up is proper installation of all electrical feed lines and metering pipes. All connecting lines
must be laid such that no mechanical forces can act on the device.
Before start-up, the seal on the pressurized connection line must be checked.
8.4.1 Zero point adjustment
The differential pressure gauge is factory adjusted therefore in normal case adjustment during installation is not
necessary. On this devices zero point adjustment on site is possible. For this, proceed as follows:
Equalize pressure in both chambers.
Disassemble screw plug.
Use zero point adjustment screw to set the pointer to zero.
Mount screw plug
Filled Models need to be vented before commissioning by
opening the air valve on the upper side of instrument!
Grounding connector for single-
wire conductor 4 … 6 mm²

Page 12 of 29
8.4.2 Setting the switch point
An adjustable lock is fitted in the front panel of the pressure
gauge. Using the removable adjustment key, the contacts
mounted on the target value indicators can be set to any point on
the range covered by the scale.
For reasons relating to accuracy of switching and the lifetime of
mechanical measurement systems, the switch points should be
positioned between 10% and 90% of the range.
Place the adjustment key on the axle of the adjustable lock.
Press the axle inwards, until the carrier arm grips behind the
adjuster pin on the target value indicator.
By turning the key, adjust the target value indicator to the
desired switch point.
Release the pressure on the axle, and remove the adjustment
key.
8.4.3 Contact function
Function 1: Close contacts with the indication rising in a clockwise direction.
Function 2: Open contacts with the indication rising in a clockwise direction.
Contact assignment:
1st contact left target value indicator,
2nd contact middle target value indicator,
3rd contact right target value indicator
8.5 Subsequent relocation of the gauge (by the customer)
Recommendation: Do not remove the differential pressure gauge from one metering point and fit it in a
different place, as there is a risk of the measuring media being mixed, with unforeseeable chemical reactions.
9 Servicing
The device is maintenance-free. However, to ensure reliable operation and a long lifetime for the device, we recommend
that it is checked regularly.
9.1 Safety
When undertaking servicing work on the device, the pressure lines must be depressurized, the electrical connections
isolated from the mains supply, and the plant secured against being switched on again.
9.2 Check on function, and recalibration
The check on function and recalibration is carried out at regular intervals, depending on the application. The precise
testing cycles should be adjusted in line with the operating conditions and ambient conditions. In the event of various
device components interacting, the operating instructions for all other devices should also be taken into account.
Check on display.
Check on function, in conjunction with downstream components.
Check of pressurized connection pipes for seal condition.
Check of electrical connections.
9.3 Cleaning and maintenance
Cleaning is carried out using a non-aggressive cleaning agent, with the ventilation valve closed and respecting the
protection category of the device.

Page 13 of 29
10 Faults
10.1 Safety
Defective or faulty pressure gauges put the operational safety and process safety of the plant at risk, and can lead to a
risk or injury to persons, the environment or the plant.
10.2 Conduct in the event of faults
All defective of faulty devices must be taken out of service. If a repair is required, the device must be sent directly to our
Repairs Department. We request that all returns of devices are agreed with our Service Department.
10.3 Fault table
Possible situations indicating a fault:
Jerky or random movement of the pointer
Pointer does not set to zero for pressure less display
Bent or loose pointer
Cracked window
Leaks when the device is filled
Damage to housing
Indications that the measurement system seal is imperfect (discoloration to dial display or of filling liquid)
In these instances, replacement of the pressure gauge is always required.
10.4 Conduct following fault rectification
See Chapter 8.3 Mounting/Installation
11 Removal, disposal
11.1 Safety
Residues of measuring media in and on removed gauges can constitute a risk to people, the environment and
equipment. Adequate precautionary measures must be adopted. If necessary, the devices must be cleaned
thoroughly (see advice in safety data sheets).
11.2 Removal
When undertaking servicing work on the device, the pressure lines must be depressurized, the electrical connections
isolated from the mains supply, and the plant secured against being switched on again.
Demount the gauge using a suitable tool
11.3 Disposal
Please help to protect the environment and dispose of or recycle the devices and components used in
accordance with the applicable regulations.

Page 14 of 29
12 Appendix
12.1 Declaration of conformity model F5503 and F5503-HP

Page 15 of 29

Page 16 of 29
12.2 Declaration of conformity model F5503 and F5503-HP with contacts

Page 17 of 29

Page 18 of 29
12.3 EU design type test certification for inductive proximity switches of types SJ2-N

Page 19 of 29

Page 20 of 29