Ashcroft N5500 User manual

Installation and Maintenance Instructions for
N5500 Capsule Pressure Gauges
© Ashcroft Inc. 2019, 250 East Main Street, Stratford, CT 06614-5145, USA, Tel: [phone], Fax: [phone], www.ashcroft.com
All sales subject to standard terms and conditions of sale. n5500_gauge_im_RevA_03-10-21 1
1 INTRODUCTION................................................................... 1
2SAFETY................................................................................. 1
2.1 General sources of hazards......................................... 1
2.2 Use in accordance with intended purpose ................ 1
2.3 Operator’s responsibility.............................................. 1
2.4 Operator qualifications ................................................ 2
2.5 Signs/Safety markings................................................. 2
2.6 Safety equipment.......................................................... 2
3 TECHNICAL DATA ............................................................... 2
4 CONSTRUCTION AND FUNCTION..................................... 2
4.1 Overview........................................................................ 2
4.2 Description of function ................................................ 2
4.3 Description of components......................................... 2
4.2 Accessories................................................................... 2
5TRANSPORT ........................................................................ 2
5.1 Safety............................................................................. 2
5.2 Transport inspection .................................................... 2
5.3 Storage .......................................................................... 2
6ASSEMBLY/INSTALLATION ................................................ 2
6.1 Safety............................................................................. 2
6.2 Installation..................................................................... 3
6.3 Start Up ......................................................................... 3
6.4 Zero-Point Adjustment................................................. 3
7 SERVICING........................................................................... 3
7.1 Safety............................................................................. 3
7.2 Check on function, and recalibration ......................... 3
7 .3 Cleaning and maintenance......................................... 3
8 APPENDIX ............................................................................ 3
8.1 Data sheet for capsule pressure gauge N5500.......... 3
1 INTRODUCTION
This Operating Manual contains fundamental and essential
advice to be followed for the installation, operation and servic-
ing of the N5500. It must be reviewed prior to assembly and
start-up of the N5500. This Operating Manual must be avail-
able at all times. The following sections about general safety
information (2) and also the following specific advice regarding
the intended purposes (2.2) contain important safety informa-
tion which, if not followed, may result in risks for people and
animals, or to property and buildings.
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 N5500 is only to be used for the intended purpose as
described by the manufacturer.
The N5500 is used for direct display of pressure, vacuum and
compound pressure. The use of the N5500 in explosion risk
areas is not allowed.
2.3 Operator’s responsibility
Safety instructions for proper operation of the N5500 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.
Conversion works or other technical alterations to the N5500
by the customer are not permitted. This also applies to instal-
lation of spare parts.
The operational safety of the N5500 is only guaranteed where
it is used for its intended purpose. The specification of the
N5500 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, exist-
ing national regulations for accident prevention, and the oper-
ator’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 personnel.

Installation and Maintenance Instructions for
N5500 Capsule Pressure Gauges
© Ashcroft Inc. 2019, 250 East Main Street, Stratford, CT 06614-5145, USA, Tel: [phone], Fax: [phone], www.ashcroft.com
All sales subject to standard terms and conditions of sale. n5500_gauge_im_RevA_03-10-21 2
2.4 Operator qualifications
The device may only be installed and started by operators
who are familiar with installation, start-up and operation of the
product.
2.5 Signs/Safety markings
The N5500 and its surrounding packaging carry markings.
These markings show the article number, measurement range
and manufacturer. The N5500 can be provided with additional
signs and safety markings advising on special conditions:
nAdvice on the filling liquid
nAdvice on calibration
nSafety marking pursuant to EN 837-3
nSilicone-free
2.6 Safety Equipment
This N5500 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).
3 TECHNICAL DATA
Detailed technical information and data sheet is available from
the Ashcroft website. Please visit www.ashcroft.com.
4 CONSTRUCTION AND FUNCTION
The label with the serial number and type designation is located
on the outside of the housing. The materials identifier is encod-
ed in the type designation.
4.1 Overview
1. Case
2. Capsule
3. Process medium
4. Process connection
5. Window
6. Dial
7. Pointer
8. Bayonet Ring
4.2 Description of function
The sensing element is a capsule which consists of two
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.
4.3 Description of components
4.3.1 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.
4.3.2 Instrument connection
The instrument connection is located on the bottom, side or at
the back side of the pressure gauge.
4.3.3 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.
4.3.4 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.
4.4 Accessories
Please contact the manufacturer regarding special tools and
accessories.
5 TRANSPORT
5.1 Safety
The N5500 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
N5500 should only be transported in a clean condition (free of
residues of measuring media).
5.2 Inspection
Upon receipt, the N5500 should be checked for any possible
damage that may have occurred during transport. In the event
of damage during transport, the delivery must not be accepted.
5.3 Storage
The N5500 must be stored in dry, clean conditions, within a
temperature range of -40 to +158°F, protected against direct
exposure to sunlight and protected against impact damage.
6 ASSEMBLY/INSTALLATION
6.1 Safety
To ensure safe working during installation and servicing,
suitable shut-off valves should be installed in the plant to allow
for:
• Gauge to be depressurized or taken out of operation;
• Gauge to be disconnected from the mains supply for repair or
checks within the plant.
• Gauge to be tested as part of standard maintenance.
During the works to mount/install the gauge, the plant must be
protected against being switched back on.
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Installation and Maintenance Instructions for
N5500 Capsule Pressure Gauges
© Ashcroft Inc. 2019, 250 East Main Street, Stratford, CT 06614-5145, USA, Tel: [phone], Fax: [phone], www.ashcroft.com
All sales subject to standard terms and conditions of sale. n5500_gauge_im_RevA_03-10-21 3
6.2 Installation
Devices with a blow-out require a minimum spacing to the rear
(1.0˝).
• Connection to be undertaken by authorized and qualified
personnel 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 kept as short as possible
and laid without sharp bends, to avoid the occurrence of
delays.
• Devices with a blow-out require a minimum spacing to the
rear (1.0˝).
6.3 Start Up
The precondition for start-up is proper installation of all elec-
trical 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
6.4 Zero point adjustment
The N5500 are supplied calibrated, 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 SERVICING
The N5500 is maintenance-free. However, to ensure reliable
operation and a long lifetime, it is recommended that it is
checked regularly.
7.1 Safety
When undertaking servicing work on the N5500, the pressure
lines must be depressurized and the plant secured against being
switched on again.
7.2 In-service inspection
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.
• Remove gauge from service should any leaks be identified.
7.3 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 N5500.
8 APPENDIX
The N5500 is maintenance-free. However, to ensure reliable
operation and a long lifetime for the N5500, we recommend
that it is checked regularly.
8.1 Data sheet for capsule pressure gauge N5500
Detailed data sheet is available from the Ashcroft website.
Please visit www.ashcroft.com for more details