Ashcroft F6509 Installation And Maintenance Instructions Manual - Page 5

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Installation and Maintenance Instructions for

F5509/F6509 Differential Pressure Gauges

Release the pressure on the axle, and remove

the adjustment key.

7.4.3 Contact function

Function 1: Close contacts with the indication rising in a

clockwise direction.

Function 2: Open contacts with the indication rising in a clock-

wise direction.

Contact assignment:

1st contact left target value indicator,

2nd contact middle target value indicator,

3rd contact right target value indicator

7.5 Subsequent relocation of the gauge (by

the customer)

Recommendation: Do not remove the pressure

gauge from one pressure monitoring location to another,

as there is a risk of the process 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 servicing the pressure gauge, the process lines must be

depressurized. Special attention should be taken to ensure

process pressure is not applied.

8.2 Gauge performance and calibration

Gauge performance and recalibration should be checked 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.

• Check of electrical connections

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.

WHEN ACTION IS REQUIRED TO REPAIR/REPLACE

THE GAUGE

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.

All sales subject to standard terms and conditions of sale. F5509_gauge_im1.0, Rev. A, 08/18

9.2 Conduct in the event of failure

All defective or faulty gauges must be taken out of service. If a

repair is required contact inside sales.

9.3 When action is required to repair/replace the gauge:

Possible situations when action should be taken:

• Jerky or random movement of the pointer

• Pointer does not set to zero for pressure less display

• Indications that the measurement system seal (diaphragm)

has been breached (discoloration to dial display or of filling

liquid)

• Bent or loose pointer

• Cracked window

• Leaks when the device is filled

• Damage to housing

• Indications that the measurement system seal is imperfect

(discoloration to dial display or of filling liquid)

In these instances, repair or replacement of the pressure gauge

is always required.

9.4 Gauge repair/replacement

See Chapter 7.3 Mounting/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 servicing the gauge, the pressure lines must be

depressurized, the electrical connections isolated from the

mains supply, and the plant secured against being switched

on again.

• Remove 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 Bourdon tube pressure gauge F5509/

F6509

Detailed data sheet is available from supplier's website (see 1.6

Manufacturer's address, customer services)

Model Description

F5509/

This table refers to specific documents:

SS differential pressure gauge F5509/F6509

F6509

K5500

Electrical contact devices for pressure & temp gauges.G1.K5500

Document

G1.F5509