Emerson Rosemount 1208C Bedienungsanleitung

Quick Start Guide

00825-0200-7062, Rev AA

February2023

Rosemount™ 1208C Level and Flow

Transmitter

Non-Contacting Radar

Contents

About this guide...........................................................................................................................3

Installing on a tank...................................................................................................................... 5

Prepare the electrical connections............................................................................................ 8

Power up transmitter................................................................................................................ 10

Configuration............................................................................................................................. 11

Quick Start Guide February2023

2 Rosemount 1208C Level and Flow Transmitter

1 About this guide

This Quick Start Guide provides basic guidelines for the Rosemount

1208C Level and Flow Transmitter. Refer to the 1208C Reference

Manual for more instructions.

1.1 Safety messages

WARNING

Failure to follow safe installation and servicing guidelines could

result in death or serious injury.

Ensure the transmitter is installed by qualified personnel and in

accordance with applicable code of practice.

Use the equipment only as specified in this Quick Start Guide and the

Reference Manual. Failure to do so may impair the protection

provided by the equipment.

Repair, e.g. substitution of components, etc. may jeopardize safety

and is under no circumstances allowed.

WARNING

Explosions could result in death or serious injury.

To prevent ignition of flammable or combustible atmospheres,

disconnect power before servicing.

Before connecting a handheld communicator in an explosive

atmosphere, ensure that the instruments are installed in accordance

with intrinsically safe or non-incendive field wiring practices.

WARNING

Process leaks could result in death or serious injury.

Handle the transmitter carefully.

Install and tighten process connectors before applying pressure.

Do not attempt to loosen or remove process connectors while the

transmitter is in service.

February2023 Quick Start Guide

Quick Start Guide 3

WARNING

Physical access

Unauthorized personnel may potentially cause significant damage to

and/or misconfiguration of end users’ equipment. This could be

intentional or unintentional and needs to be protected against.

Physical security is an important part of any security program and

fundamental to protecting your system. Restrict physical access by

unauthorized personnel to protect end users’ assets. This is true for

all systems used within the facility.

CAUTION

Hot surfaces

The transmitter and process seal may be hot at high process

temperatures. Allow to cool before servicing.

1.2 Bracket mounting

See the documentation supplied with the bracket kit.

Quick Start Guide February2023

4 Rosemount 1208C Level and Flow Transmitter

2 Installing on a tank

2.1 Mount the flange

Procedure

1. Place a suitable gasket on the tank flange.

2. Place the flange over the gasket.

3. Tighten the bolts and nuts with sufficient torque for the flange

and gasket choice.

4. Apply appropriate thread sealant to the transmitter threads.

Note

Only for NPT threaded tank connection.

February2023 Quick Start Guide

Quick Start Guide 5

5. Install and hand tighten the transmitter.

Note

The gasket is necessary for the G threaded version only.

2.2 Mount the NPT threaded adapter

Procedure

1. Apply appropriate thread sealant to the outer threads.

2. Mount the threaded adapter on the tank.

60 mm

Quick Start Guide February2023

6 Rosemount 1208C Level and Flow Transmitter

3. Apply appropriate thread sealant to the transmitter threads.

4. Install and hand tighten the transmitter.

February2023 Quick Start Guide

Quick Start Guide 7

3 Prepare the electrical connections

3.1 Connector type

M12 male (A-coded)

3.2 Cable selection

Use 24-18 AWG wire (0.20-0.75 mm2). Twisted pairs and shielded

wiring are recommended for environments with high EMI

(electromagnetic interference).

3.3 Internal power consumption

< 0.8 W in normal operation

3.4 Cable shield grounding

Make sure the instrument cable shield is:

•Continuously connected throughout the segment.

•Connected to a good earth ground at the power supply end.

3.5 Power supply

The transmitter operates on 14-35 Vdc at the transmitter terminals.

3.6 Load limitations

For HART® communication, a minimum loop resistance of 250 Ω is

required. Maximum loop resistance (R) is determined by the voltage

level of the external power supply (UE):

R = 44.4 × (UE − 14)

Quick Start Guide February2023

8 Rosemount 1208C Level and Flow Transmitter

Figure 3-1: Load Limits

R (Ω)

(Vdc)

444

250

930

14 3524

19.6

200

400

600

800

3.7 Wiring diagram

Figure 3-2: Connection

L+

Table 3-1: Pin Assignment

Pin Wire color(1) Signal

1 BN Brown L+ 24 V

2 WH White NC Not connected

3 BU Blue L- 0 V

4 BK Black NC Not connected

(1) According to IEC 60947-5-2.

February2023 Quick Start Guide

Quick Start Guide 9

4 Power up transmitter

Procedure

1. Verify the power supply is disconnected.

2. Insert the M12 connector gently.

Note

Do not force the connector into place. Check that it is aligned

properly.

3. Once fully inserted, turn the screw ring until tight.

See the manufacturer’s instruction manual for recommended

torque.

4. Connect the power supply.

Quick Start Guide February2023

10 Rosemount 1208C Level and Flow Transmitter

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