Endress+Hauser Micropilot FMR51 Bedienerhandbuch

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Special documentation

Micropilot FMR51, FMR57

Horn protection

For 80 mm (3") and 100 mm (4") horn antenna

SD01084F/00/EN/02.14

71246966

Safety instructions Micropilot FMR51, FMR57

1 Safety instructions

1.1 Designated use

The horn protection is a retrofitting part for Micropilot FMR51 and FMR57 level

measurement devices.

1.2 Installation and commissioning

1.2.1 Authorised personnel

All operations described in this mounting instructions manual must be carried out only by

trained specialist personnel authorised by the operator. During work on and with the device

the required personal protection equipment must always be worn.

1.2.2 Warning about misuse

Inappropriate or incorrect use of the instrument can give rise to application-specific hazards,

e.g. vessel overfill or damage to system components through incorrect mounting or

adjustment.

1.3 Operational safety

1.3.1 General safety instructions

The safety information in the operating instructions of the respective sensor must be

observed.

1.3.2 Hazardous areas

• in gas explosion hazardous areas

• in dust explosion hazardous areas (apparatus group IIIC)

NOTICE

Danger of explosion

‣In gas explosion hazardous areas: Avoid electrostatic charging (e.g. through friction,

cleaning, maintenance, strong medium flow).

Micropilot FMR51, FMR57 Product description

2 Product description

2.1 Configuration

The scope of delivery encompasses:

• Horn protection

• Hexagon screws M4

– 6 pcs. with antenna diameter 75 mm (2.95 in)

– 8 pcs. with antenna diameter 95 mm (3.74 in)

• Holding ring

• Contact ring

• O-ring seal

• Flat seal

• Documentation: this mounting instructions

2.2 Principle of operation

The horn protection is suitable for Micropilot FMR51/FMR57 level measurement devices in

applications with strong buildup and condensation inside the horn antenna. Thanks to seals

on the horn protection and antenna socket, moisture penetration can be prevented. The

contact ring provides an electrical connection between holding ring and horn antenna.

When using the horn protection, it is not possible to apply purge air through the air purge

connection of the FMR57 as the antenna is sealed by the protection.

Mounting Micropilot FMR51, FMR57

3 Mounting

3.1 Mounting preparations

The following tools are necessary for mounting: Hexagon spanner size 3

3.2 Mounting steps

NOTICE

The tightness of the device is not achieved when using the wrong seal.

‣Do not interchange the flat seals. The flat seals with the bigger inner diameter are

intended for the antenna extension.

3.2.1 Standard

1 2 3456 7 8

A0019145

 1 Mounting horn protection

1 Flat seal

2 Lock washer

3 Screws, antenna socket

4 Holding ring

5 Contact ring

6 O-ring seal

7 Horn protection

8 Screws, horn protection

1. Loosen the screws (3) on the antenna socket and remove horn antenna.

2. Shift O-ring seal (6), contact ring (5) and holding ring (4) onto the antenna cone.

3. Plug horn protection (7) onto the antenna opening and direct the holes to the holding

ring (4).

4. Tighten the screws (8) crosswise until the horn protection (7) and holding ring (4) are

assembled. Max. torque 1.25 Nm (0.92 lbf ft)

5. Insert flat seal (1) between horn antenna and antenna socket.

Micropilot FMR51, FMR57 Mounting

6. Retighten the horn antenna with screws (3) to the antenna socket; Max. torque

3 Nm (2.21 lbf ft).

3.2.2 Antenna extension

1 1

2 2

3 3

4567 8

A0022796

 2 Mounting horn protection with antenna extension

1 Flat seal

2 Nord-Lock washer

3 Screws, antenna socket

4 Holding ring

5 Contact ring

6 O-ring seal

7 Horn protection

8 Screws, horn protection

4 Antenna extension

1. Loosen the screws (3) on the antenna socket and on the antenna extension. Then

remove the horn antenna.

2. Shift O-ring seal (6), contact ring (5) and holding ring (4) onto the antenna cone.

3. Plug horn protection (7) onto the antenna opening and direct the holes to the holding

ring (4).

4. Tighten the screws (8) crosswise until the horn protection (7) and holding ring (4) are

assembled; Max. torque 1.25 Nm (0.92 lbf ft)

5. Insert flat seal (1) between horn antenna and antenna extension. Likewise between

antenna extension and antenna socket.

6. Retighten the horn antenna with screws (3) to the antenna socket; Max. torque

3 Nm (2.21 lbf ft).

Appendix Micropilot FMR51, FMR57

4 Appendix

4.1 Technical data

4.1.1 Materials

Horn protection PTFE

Screws 316L

Holding ring 316L

Contact ring 316L

O-ring seal Silicone

Flat seal PTFE

4.1.2 Process conditions

Vessel pressure max. 0.5 bar (7.252 psi)

Process temperature max. 130 °C (266 °F)

4.2 Dimensions

4.2.1 Horn protection for horn antenna 80 mm (3 in) 1)

237 (9.33)

³DN100 mm (in)

ø96 (3.78)

ød

A0019143

 3 Horn protection for horn antenna 80 mm (3")

1) Associated version of FMR51/FMR57: feature 070 "Antenna", option model BC "Horn 80mm/3in"

Micropilot FMR51, FMR57 Appendix

4.2.2 Horn protection for horn antenna 100 mm (4 in) 2)

450 (17.72)

ø116 (4.57)

mm (in)

ød

³DN150

A0019144

 4 Horn protection for horn antenna 100 mm (4")

4.3 Ordering information

Antenna size Order code of horn protection

80mm / 3" 71105890

100mm / 4" 71105889

2) Associated version of FMR51/FMR57: feature 070 "Antenna", option model BD "Horn 100mm/4in"

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*71246966*

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