Ashcroft A5400 Instruction Manual

Installation and Maintenance
Instruction Manual
Absolute pressure gauge, model A5400/A6400
for industrial application
IM-A5400-EN-Rev A 07/2023 Page 1 of 8

Page 2 of 8
Table of contents:
1 General 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
2 Safety........................................................................................................................................................................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.....................................................................................................................................5
3 Technical data ..........................................................................................................................................................5
4 Labeling on the device..............................................................................................................................................5
5 Construction and function.........................................................................................................................................5
5.1 Overview..............................................................................................................................................................5
5.2 Description of function.........................................................................................................................................5
5.3 Description of components..................................................................................................................................5
5.4 Accessories.........................................................................................................................................................6
6 Transport ..................................................................................................................................................................6
6.1 Safety ..................................................................................................................................................................6
6.2 Transport inspection............................................................................................................................................6
6.3 Storage................................................................................................................................................................6
7 Assembly/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
8 Servicing...................................................................................................................................................................7
8.1 Safety ..................................................................................................................................................................7
8.2 Check on function, and recalibration...................................................................................................................7
8.3 Cleaning and maintenance..................................................................................................................................8
9 Faults........................................................................................................................................................................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
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 andbuildings.
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-freeoperation.
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 aneventuality.
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 andPayment.
1.6 Manufacturer’s address, customer services
Ashcroft Instruments (Jiaxing) Co.,Ltd
Building 1, No. 1188, Fenghua Road,
Chengnan street, Economic and Technological
Development Zone
Jiaxing, Zhejiang, China
Tel.: [phone]
E-mail: [e-mail] .cn

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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 EN837-2.
2.2 Use in accordance with intended purpose
The devices are only to be used for the intended purpose as described by themanufacturer.
The devices are used for direct display of absolutepressure.
For each use scenario, the corresponding set-up regulations must berespected.
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 and in sector-
specific instances of use , the guidelines and the regulations supplied by local utilitiescompanies.
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
 Oil-can deleted (if oxygen is used)
 Silicone-free (for use in the automotiveindustry)
2.6 Safety equipment
This device is fitted with a plug capable of being blown out. For a description, please refer to Chapter 6.3.4.
The window of model A5400/A6400 uses safetyglass.

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2.7 Environmental protection
This device may optionally contain a filling liquid (e.g. glycerin or silicone oil). The provisions set out in the
regulation such as REACH 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 fordownload.
3 Technical data
The detailed technical information can be found in the product datasheet.
4 Labeling on the device
The label with the product information is located on the outside of the housing.
5 Construction and function
5.1 Overview
1 Diaphragm
2 Link
3 Movement
5.2 Description of function
The sensing system consists of two pressure chambers, separated
by a diaphragm (1). The upper pressure chamber contains a high level vacuum and provides the reference for
absolute pressuremeasurement.
Pressure to be measured is applied to the pressure connection and the lower pressure chamber. The sensing
element, a diaphragm, will be exposed from lower side with pressure. Under pressure the elastic diaphragm is
deflecting against the zero position. This deflection is proportional to the adjacent pressure. The link and movement
transfer the deflection to thepointer.
The display of the measured value is given on a 270°scale.
5.3 Description of components
5.3.1 Scale with pointer
The pressure gauge is equipped with a dial face and pointer similar to EN 837-3, nominal size 100 mm or 160mm.
5.3.2 Instrument connection
The instrument connection is located on the bottom 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 66(dry gauge) is achieved. Liquid filled gauges should be vented for
temperaturecompensation.

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5.3.4 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 837-1 and simultaneously allow for temperature compensation (within limits) for the housing, via a
rubber membrane.
5.4 Accessories
Please contact the manufacturer regarding special tools andaccessories.
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 measuringmedia).
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 complaintinitiated.
6.3 Storage
The pressure gauge must be stored in dry, clean conditions, within a temperature range of -20 to +80 °C (for dry
gauge), protected against direct exposure to sunlight and protected against impactdamage.
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 5.4
Accessories), enabling the device:
 To be depressurized or taken out ofoperation;
 To be disconnected from the mains supply for repair or checks within the relevantplant;
 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 pressurespikes.
 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 (20mm).
 The installation location should be chosen such that the work-spaces for operating personnel are not located to
the rear of the pressuregauge.
7.3 Mounting/Installation
7.3.1 Process connection
As standard, the device is equipped for pipework mounting with a pressure connection shank. The device is calibrated
ex works for verticalinstallation.
 Connection to be undertaken by authorized and qualified specialist staffonly.
 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 bedepressurized.

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 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 beinstalled.
 The pressure metering pipe must be kept as short as possible and laid without sharp bends, to avoid the
occurrence of irritating delays.
 With liquid measurement media, the pressurized connection pipe must be degassed, since any gas bubble
inclusions result in measurementerror.
 If water is used as the measurement medium, the device must befrost-protected.
Safety notice: Only mount using the correct open-jawed wrench, and do not twist the deviceitself.
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 thedevice.
Before start-up, the seal on the pressurized connection line must bechecked.
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.
7.4.2 Venting
Liquid filled gauges should be vented for temperaturecompensation.
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 chemicalreactions.
8 Servicing
The device is maintenance-free. However, to ensure reliable operation and a long lifetime for the device, we
recommend that it is checkedregularly.
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 downstreamcomponents.
 Check of pressurized connection pipes for sealcondition.

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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 toa
risk or injury to persons, the environment or theplant.
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 thepointer
 Pointer does not set to zero at fullvacuum
 Indications that the measurement system seal is
imperfect (discoloration to dial display or of fillingliquid)
 Bent or loose pointer
 Cracked window
 Leaks when the device is filled
 Damage to housing
In these instances, replacement of the pressure gauge is alwaysrequired.
9.4 Conduct following fault rectification
See Chapter 7.3Mounting/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 datasheets).
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 onagain.
 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.