Ashcroft N5500 Instruction Manual

IM-N5500-E-Rev 0 02/2013 Page 1 of 8
P/N 095I109-01EN
Installation and Maintenance
Instruction Manual
Capsule pressure gauge, model N5500
for industrial application
In the following configuration:
•###N5500### capsule pressure gauge without switching contact

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Table of contents:
1General remarks.........................................................................................................................................................3
1.1 Purpose of this Manual........................................................................................................................................3
1.2 Symbols...............................................................................................................................................................3
1.3 Limits of liability...................................................................................................................................................3
1.4 Copyright.............................................................................................................................................................3
1.5 Warranty..............................................................................................................................................................3
1.6 Manufacturer’s address, customer services........................................................................................................3
2Safety..........................................................................................................................................................................4
2.1 General sources of hazards................................................................................................................................4
2.2 Use in accordance with intended purpose..........................................................................................................4
2.3 Operator’s responsibility......................................................................................................................................4
2.4 Staff qualifications (target group assessment)....................................................................................................4
2.5 Signs/Safety markings.........................................................................................................................................4
2.6 Safety equipment ................................................................................................................................................4
2.7 Environmental protection.....................................................................................................................................4
3Technical data ............................................................................................................................................................5
4Labeling on the device................................................................................................................................................5
5Construction and function...........................................................................................................................................5
5.1 Overview..............................................................................................................................................................5
5.2 Description of function.........................................................................................................................................5
5.3 Description of components..................................................................................................................................5
5.4 Accessories.........................................................................................................................................................6
6Transport ....................................................................................................................................................................6
6.1 Safety ..................................................................................................................................................................6
6.2 Transport inspection............................................................................................................................................6
6.3 Storage................................................................................................................................................................6
7Assembly/Installation..................................................................................................................................................6
7.1 Safety ..................................................................................................................................................................6
7.2 Preparations (requirements for the installation location).....................................................................................6
7.3 Mounting/Installation ...........................................................................................................................................6
7.4 Starting up...........................................................................................................................................................7
7.5 Subsequent relocation of the gauge (by the customer)......................................................................................7
8Servicing.....................................................................................................................................................................7
8.1 Safety ..................................................................................................................................................................7
8.2 Check on function, and recalibration...................................................................................................................7
8.3 Cleaning and maintenance .................................................................................................................................8
9Faults..........................................................................................................................................................................8
9.1 Safety ..................................................................................................................................................................8
9.2 Conduct in the event of faults..............................................................................................................................8
9.3 Fault table............................................................................................................................................................8
9.4 Conduct following fault rectification.....................................................................................................................8
10 Removal, disposal...................................................................................................................................................8
10.1 Safety...............................................................................................................................................................8

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10.2 Removal...........................................................................................................................................................8
10.3 Disposal...........................................................................................................................................................8
11 Appendix.................................................................................................................................................................8
11.1 Data sheet for capsule pressure gauge N5500...............................................................................................8
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 (10.3) 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

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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.
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 overpressures, vacuum and compound pressure.
For each use scenario, the corresponding set-up regulations must be respected.
The usage in explosion risk areas is not allowed.
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 9: Faults).
Conversion works or other technical alterations to the device by the customer 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.
2.4 Staff qualifications (target group assessment)
The device may only be installed and started up by specialist staff who are familiar with 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.
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
Safety marking pursuant to EN 837-3
Silicone-free (for use in the automotive industry)
2.6 Safety equipment
This device is fitted with a rear wall or plug capable of being blown out. For a description, please refer to Chapter
6.3.4.
The window of model N5500 uses instrument glass (optional multi-layer safety glass).
2.7 Environmental protection

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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.
3 Technical data
The detailed technical information can be found in the documents in the Appendix, Chapter 11.
4 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 Construction and function
5.1 Overview
1 Case
2 Capsule
3 Process medium
4 Process connection
5 Window
6 Dial
7 Pointer
8 Bajonett ring
5.2 Description of function
The sensing element, a capsule consists of two corrugated diaphragms that are assembled pressure tight at the edge.
The pressure is led to the central point of the diaphragm and acts on the inside of the capsule. The hereby produced
lifting movement is a measure for the pressure.
5.3 Description of components
5.3.1 Scale with pointer
The pressure gauge is equipped with a dial face and pointer pursuant to EN 837-3, nominal size 100 mm or 160 mm.
Erläu terung , z usä tzli ch ei n H i nweis :
5.3.2 Instrument connection
The instrument connection is located on the bottom side or at the back side of the pressure gauge and is a threaded
connection.
5.3.3 Vent valve
The vent valve for the housing is located on the top side. If the nipple is pulled out, the housing is ventilated and the
pressure which has built up in the housing due to the influence of temperature is discharged. With the valve closed,
protection class IP 65 is achieved.
5.3.4 Rear wall/plug with blow-out capability
The pressure gauge has a plug capable of blowing out on the rear wall of the housing. These act as a safety feature
pursuant to EN 837-3 and simultaneously allow for temperature compensation for the housing, via a rubber
membrane.
1
2
3
4
5
6
7
8

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5.4 Accessories
Please contact the manufacturer regarding special tools and accessories.
6 Transport
6.1 Safety
The 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).
6.2 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.
6.3 Storage
The 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.
7 Assembly/Installation
7.1 Safety
To ensure safe working during installation and servicing, suitable shut-off valves must be installed in the plant (see 6.4
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.
7.2 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.
Devices with a blow-out require a minimum spacing to the rear (20 mm).
The installation location should be chosen such that the work-spaces for operating personnel are not located to
the rear of the pressure gauge.
7.3 Mounting/Installation
7.3.1 Process connection
As standard, the device is equipped for pipework mounting with a pressure connection shank pursuant to
DIN EN 837-3. The device is calibrated ex works for vertical installation.
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.

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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.
7.4 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.
7.4.1 Zero point adjustment
The pressure gauges are supplied calibrated ex works, so that as a rule there is no need for calibration works at the
installation point.
Zero point adjustment on site is standard. For this, proceed as follows:
Depressurize the pressure metering pipe.
Open the bayonet ring and remove ring and window.
Hold the pointer in place while turning the screw, until the pointer (after
releasing again) has the correct position.
Close the case again and pay attention to correct fit of window, gasket
and bayonet ring.
Liquid filled gauges must be demounted before the zero point
adjustment can be done (on a horizontal area to prevent leaking).
7.5 Subsequent relocation of the gauge (by the customer)
Recommendation: Do not remove the 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.
8 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.
8.1 Safety
When undertaking servicing work on the device, the pressure lines must be depressurized and the plant secured
against being switched on again.
8.2 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.

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8.3 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.
9 Faults
9.1 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.
9.2 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.
9.3 Fault table
Possible situations indicating a fault:
Jerky or random movement of the pointer
Pointer does not set to zero for pressure less display
Indications that the measurement system seal is
imperfect (discoloration to dial display or of filling liquid)
Bent or loose pointer
Cracked window
Leaks when the device is filled
Damage to housing
In these instances, replacement of the pressure gauge is always required.
9.4 Conduct following fault rectification
See Chapter 8.3Mounting/Installation
10 Removal, disposal
10.1 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).
10.2 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
10.3 Disposal
Please help to protect the environment and dispose of or recycle the devices and components used in
accordance with the applicable regulations.
11 Appendix
11.1 Data sheet for capsule pressure gauge N5500
Detailed data sheet is available from suppliers website (see 1.6 Manufacturer’s address, customer services)
This table refers to specific documents:
Model
Description
Document
N5500
Stainless steel pressure gauge model N5500
G1.N5500