Ashcroft T5500 Operating Manual

Installation and Maintenance
Instruction Manual

Bourdon tube pressure gauge, model T5500 and T6500

for industrial application
In the following configuration:

• ###T5500### bourdon tube pressure gauge without switching contact

• ###T6500### bourdon tube pressure gauge acc. safety design S3 without switching contact

IM-T5500-E-Rev B 04/2018 Page 1 of 8
P/N 095I103-01EN

Table of contents:

General remarks ......................................................................................................................................................... 3

1

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..................................................................................................................................... 4

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 ......................................................................................................................................................... 5

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

Page 2 of 8

Removal ........................................................................................................................................................... 8

10.2

10.3 Disposal ........................................................................................................................................................... 8

11 Appendix ................................................................................................................................................................. 8

11.1 Data sheet for Bourdon tube pressure gauge T5500, T6500 .......................................................................... 8

1 General remarks

1.1 Purpose of this Manual

This Operating Manua l contains fundamental and essential a dvice to be followed for the installation, o peration 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 spec ialis t pers onnel res pons ible f or the d evice. T his O perat ing Manual m ust be a vai lable a t 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) an d thr o ugh to d is pos a l (10.3) contain important safet y inf ormation which, if not f oll o wed, may
result in risks for people and animals, or to property and buildings.

1.2 Symbols

Warning!

This indicates a poss ibl y hazardous situation wh ere fail ing to follow advic e m ay res ult in ris ks to peopl e,
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 Man ual m ay only be c opied and pass ed on as a complete docum ent without t he spec ial pe rmission of
the publisher.

1.5 Warranty

For the product des cribed here, we of fer a warranty pursuant to our General T erms and Conditions on Delivery and
Payment, Section 6: Liability for Defects.

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

Page 3 of 8

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 (use T5500/T6500 with ATEX approval instead).

2.3 Operator’s responsibility

Safety instructions for proper oper ation of the de vice must be res pected. The y are to be pro vided by the op erator for
use by the respecti ve personnel for installation, servi cing, inspection and operation. Risk s from electrical e nergy and
from the released e nergy of the medium , from escaping media and f rom improper connect ion of the device m ust be
eliminated. The details f or this are to be found in the corresponding ap plicable set of regulations, such as D IN 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 secur ed against inad vertently bein g restarted, if the presumption is that
risk-free operation is no longer possible (see Chapter 9: Faults).

Conversion work s or other technical alterations to the device by the cus tomer are not perm itted. This also applies to
installation of spare parts. Possible conversations or alterations may only be carried out by the manufacturer.

The operational safet y of the device is only guarante ed where it is used for its intended purpose. The specification of
the device must be adapted to the m edium used in the plant. T he limit values indicate d in the technical dat a must not
be exceeded.

The safety information det ailed in t his Operating Manual, ex isting nati onal regula tions f or accident prev ention, and th e
operator’s internal regulations regarding working, operations and safety must be respected.

The operator is res ponsible for all s pecif i ed s er vic ing, inspection and i nstal lat ion wor k s bein g c ar ri ed 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 w ho are able to assess the work assigned to them on the basis of their s pecialist 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 837-1

 Oil-can deleted (if oxygen is used)
 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 5.3.4
The window of model T6500 uses multi-layer safety glass (for model T5500 optional).

2.7 Environmental protection

Page 4 of 8

This device may optional ly contain a filling li quid (e.g. glycerin or si licone oil). The provisions set out in th e REACH

1 Bourdon tube

11 Blow-out and compensation plug

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 seri al nu mber, type designati on and process/ambient temperature range is located on the out sid e of
the housing. The materials identifier is encoded in the type designation.

5 Construction and function

5.1 Overview

2 Socket and process connection
3 Movement
4 Pointer
5 Dial
6 Window
7 Bayonet ring
8 Gasket
9 Vent valve
10 Case

5.2 Description of function

The sensing element, a bo urdon tube ( C-form or helical) that is welded to the s ocket , will be expos ed from ins ide with
pressure. Under pr essure the elast ic tube is def lecting against the zero positio n. This deflect ion is proporti onal to the
adjacent pressure. The movement transfers the deflection to the pointer.

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 pursuant to EN 837-1, nominal size 100 mm or 160 mm.

 Erläuterung , zusätzli ch ein Hi nweis:

5.3.2 Instrument connection

The instrument connection is located on the bottom side (T5500 and T6500) or at the back side (T5500) 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 ve ntilated and the
pressure which has built up in the housing due to the influence of temperature is dischar ged. With the valve clos ed,
protection class IP 66 (for T6500 dry execution IP65) is achieved.

5.3.4 Rear wall/plug with blow-out capability

The pressure gauge has a plug capab le of blowing out on the r ear wall of the h ousing (Model T5500) or a rear wall
capable of blowing out ( Model T6500) . These act as a s afety feature pursuan t to EN 837-1 and s imultaneous ly allow
for temperature compensation for the housing, via a rubber membrane.

5.4 Accessories

Please contact the manufacturer regarding special tools and accessories.

Page 5 of 8

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 pack aging provided, to protect agai nst glass break age. The device shou ld only be trans ported 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 bei ng
recorded and, if necessary, a complaint initiated.

6.3 Storage

The pressure gauge must be stored i n dry, clean conditions, wit hin 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 instal lation an d s er vic in g, s uitable shut-off valves must be instal le d in the plant (see 5.4
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 suitabilit y of the device for the medium to be m easured, the sc ope of the m easurement range a nd of

the protection against special conditions such as vibrations, pulsations and pressure spikes.

 A bracket must be instal led to support the pressure gauge if the metering pip e is not able to provide adequate

support.

 Devices with a blow-out require a minimum spacing to the rear (20 mm).
 The installation location shoul d 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 f or pipew ork mounting with a pressur e c onn e ct ion sha nk pursuant to DIN EN 83 7 -

1. The device is calibrated ex works for vertical installation.

 Connection to be undertaken by authorized and qualified specialist staff only.
 Use only with the m echanical process connec tion provided – re garding the configuration, see order c ode on the

device type label, with a matching threaded seal.

 When connecting the device, the pipes must be depressurized.
 The pressure metering pip e must be laid inclined in s uch a way that, for example, f or measurements of fluids no

air pockets can f orm, and for measurem ents of gases no water poc kets. If the necessar y 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.

 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.

Page 6 of 8

Safety notice: Only mount using the correct ope n-jawed wrench, and do not twist the device itself.

Check if internal pressure was built up in the case due to ambient

be demounted before the zero point

7.4 Starting up

The precondition f or start-up is proper installation of a ll electrical feed lines and m etering pipes. All con necting 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 s upplied calibrated ex work s, so that as a rule there is no need for calibratio n works at the
installation point.

For devices with Micrometer pointer (see. order code), zero point adjustment on site is possible. For this, proceed as
follows:

 Depressurize the pressure metering pipe.


temperature effec t. O pen v alve ( position B), wait for pres s ure r elief and
close valve again (position A)

 Open the bayonet ring and remove ring and window.
 Hold the pointer in place w hile turn ing the sc re w, until the point er (af ter

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
adjustment can be done (on a horizontal area to prevent leaking).

7.4.2 Use under arctic condition

Pressure gauges with XQC option are designed for ambient temperature range from -70 °C to 70°C.

The vent valve must be pulled out and open (position B). This vents the case
to atmospheric pressure and avoids wrong indication due to pressure build up
internally or pressure build up in the cause that can induce fill leakage.

7.5 Subsequent relocation of the gauge (by the customer)

Recommendation: D o not remove the pressure gauge from one metering p oin t an d f it it in a d ifferent 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, dependin g on the application. The precis e
testing cycles should be ad justed in line with the oper ating conditions and am bient conditions . In the event of various
device components interacting, the operating instructions for all other devices should also be taken into account.

 Check on function, in conjunction with downstream components.

Page 7 of 8

Model

Description

Document

T5500

Stainless steel pressure gauge model T5500

G1.T5500

T6500

Stainless steel pressure gauge Solid Front design model T6500

G1.T5500

 Check of pressurized connection pipes for seal condition.  Check on display

8.3 Cleaning and maintenance

Cleaning is carried out usi ng a non-aggressive cleaning agent, with the vent ilation valve closed and respecting the
protection category of the device.

9 Faults

9.1 Safety

Defective or faulty pressur e gauges pu t the operational s af et y and proces s s af ety 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 r epair 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)

In these instances, replacement of the pressure gauge is always required.

 Bent or loose pointer
 Cracked window
 Leaks when the device is filled
 Damage to housing

9.4 Conduct following fault rectification

See Chapter 8.3Mounting/Installation

10 Removal, disposal

10.1 Safety

Residues of meas uring media in and on remove d gauges can const itute a risk to people, th e 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 applicabl e regula tio ns .

11 Appendix

11.1 Data sheet for Bourdon tube pressure gauge T5500, T6500

Detailed data sheet is available from supplier’s website (see 1.6 Manufacturer’s address, customer services)
This table refers to specific documents:

Page 8 of 8