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Ashcroft N5500 Instruções de instalação e manutenção

Installation and Maintenance Instructions for

N5500 Capsule Pressure Gauges

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:

n Advice on the filling liquid

n Advice on calibration

n Safety marking pursuant to EN 837-3

n Silicone-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

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

All sales subject to standard terms and conditions of sale. n5500_gauge_im_RevA_03-10-21

1. Case

2. Capsule

3. Process medium

4. Process connection

5. Window

6. Dial

7. Pointer

8. Bayonet Ring

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.