Endress+Hauser FEC 12 Manuel utilisateur

Electronic insert

FEC 12 with

HART Protocol

Level Measurement

Operating Instructions

BA148F/00/en/07.95 (b)

Software Version 1.x

Part No. 016700-1000

Hauser

Endress

The Power of Know How

Short Instructions

The short instructions are intended for trained personnel who have read and

understood the operating instructions in this manual. They allow a quick standard

calibration of the electronic insert using the its own operating elements. A detailed

description of calibration and operation is given in Sections 3 - 5.

Reset to

factory settings:

Linearisation at

handheld terminal

Unlock parameters:

Lock parameters:

Full calibration:

Empty calibration:

linear:

horiz. cylinder:

Linearisation

at FEC 12

FEC 12

✔

5 s

2 s

2 sLED

LED

Abb. 1

Short instructions for calibrating

the FEC 12 electronic insert using

its own operating elements

lid with

short instructions

Electronic insert FEC 12 (HART)

Table of Contents

Short Instructions

Notes on Safety . . . . . . . . . . 2

1 Introduction . . . . . . . . . . 3

1.1 Application 3

1.2 Measuring System 3

1.3 Operating Principle 3

2 Installation . . . . . . . . . . . 4

2.1 Electrical Connection 4

2.2 Technical Data 5

3 Operating Elements . . . . . . . 6

3.1 FEC 12 Electronic Insert 6

3.2 HART Communicator DXR 275 7

3.3 HART Menu Structure 7

4 Calibrating for Level Measurement 8

4.1 Basic Calibration at the FEC 12

Electronic Insert 8

4.2 Basic Settings using the HART

Communicator DXR 275 11

4.3 Extended Calibration using the

HART Communicator 275 12

5 Entries for the Measuring Point . 14

5.1 Locking/Unlocking Parameters 14

5.2 Tag Number 14

6 Diagnosis and Troubleshooting . 15

6.1 Alarms 15

6.2 Simulation 15

6.3 Description of Fault Responses,

Error Messages 17

6.4 Replacing the FEC 12 Electronic Insert 17

6.5 Transmitting Basic Settings 17

6.6 Transmitting All Settings 18

Supplementary

documentation

In addition to these operating instructions, the following documentation is also

available on the use of the FEC 12 electronic insert:

•Technical Information TI 242F/00/e: Multicap Probes DC ... E

•Technical Information TI 243F/00/e: Multicap Probes DC ... A

•Technical Information TI 240F/00/e: Multicap Probes DC ... T

•Operating instructions for the HART handheld terminal DXR 275

Electronic insert FEC 12 (HART)

Endress+Hauser 1

Notes on Safety

Approved usage The electronic insert FEC 12 may be used for level measurement in connection with

capacitive Multicap probes only. It has been designed to operate safely in

accordance with current technical and safety standards and must be installed by

qualified personnel according to the instructions in this manual.

The manufacturer accepts no responsibility for any damage arising from incorrect

use, installation or operation of the equipment. Changes or modifications to the

equipment not expressly approved in the operating instructions or by the bodies

responsible for compliance may make the user’s authority to use the equipment null

and void. Damaged instruments which may be a safety hazard must not be operated

and are to be marked as defective.

Use in hazardous areas When used in explosion hazardous areas, the equipment must be installed in

accordance with local regulations as well as with the technical and safety

requirements on the measuring point as specified in the accompanying certificate.

Installation,

commissioning and

operation

Installation, electrical connection, commissioning, operation and maintenance may

be carried out by trained and authorised personnel only. The operating instructions

must have read and understand before the equipment is installed: instructions are to

be followed exactly.

Safety Conventions

In order to highlight safety-relevant procedures in the manual, the following

conventions have been used, each indicated by a corresponding icon in the margin.

Note!

A note highlights actions or procedures which, if not performed correctly, may

indirectly affect operation or may lead to an instrument response which is not planned.

Caution!

A caution indicates actions or procedures which, if not performed correctly, may lead

to personal injury or incorrect function of the instrument.

Warning!

A warning indicates actions or procedures which, if not performed correctly, may lead

to personal injury, a safety hazard or destruction of the instrument.

Warning!

Note!

Caution!

Notes on Safety Electronic insert FEC 12 (HART)

2Endress+Hauser

1 Introduction

1.1 Application

The FEC 12 electronic insert is a transmitter for capacitive level measurement. It

converts changes in capacitance resulting from changes in level into a

capacitance-proportional impressed current. In vessels with a uniform cross section,

the level or quantity (volume) can be thus displayed as a percentage of full level or, if

a handheld terminal is used, in technical units. A pre-stored linearisation program

also allows volumes to be measured in horizontal cylinders.

The FEC 12 electronic insert is installed in the housing of the Multicap probe. It can

be used for applications in explosion hazardous areas.

Versions

Versions with corresponding features

Two versions of the FEC 12 electronic insert are available:

•With HART protocol to be used with the Universal HART Communicator (described

in these operating instructions) and

•With INTENSOR protocol to be used with the Commulog VU 260 Z (see operating

instructions BA 149F/00/e).

The version with the INTENSOR protocol can also be used for communication with

the Silometer FMX 770.

Features•Analogue output signal: standard 4...20 mA current.

•Easy on-site settings: Settings "empty calibration" (= 4 mA) and "full calibration"

(= 20 mA) using pushbuttons on the electronic insert.

•Operates with a linear characteristic as well as with a stored linearisation curve for

horizontal cylinders.

•The adjustable integration time ensures stable measured values even with agitated

materials.

1.2 Measuring System

The measuring system consists of a

capacitive Multicap level probe and an

FEC 12 electronic insert. A DC power

supply is also required. The two-wire

power cable is also used for signal

transmission, and delivers a 4...20 mA

signal with a superimposed bidirectional

digital signal conforming to the HART

protocol. The superimposed signal has

no influence on the follow-up

instrumentation.

1.3 Operating Principle

Capacitive measurement functions as follows: the probe and vessel wall form a

capacitor. Depending on the level, the space between these "capacitor plates" is filled

either with air (empty vessel) or an unspecified quantity of material. The initial

capacitance for the empty vessel is low but increases proportionally to the amount of

material covering the probe.

4...20 mAwith

digital signal

e.g. display

e.g. plotter

DC power

supply or

PLC

Multicap

probe

Fig. 2

Measuring system:

the electronic insert is used in a

Multicap probe for capacitive

measurement.

Electronic insert FEC 12 (HART) 1 Introduction

Endress+Hauser 3

2 Installation

This section describes the electrical connection of the electronic insert. See Section 6

for instructions on replacing the electronic insert.

2.1 Electrical Connection

Insert the power cable through the cable

entry on the probe housing. Unscreened

or general purpose multi-core cable can

be used as the connecting cable. If

strong electromagnetic interference

occurs due to, e.g. machinery or radios,

then screened cable, grounded at the

probe end, should be used. Connect the

screening to the ground terminal on the

probe housing.

The power cable is connected to

Terminals 1 - and 2 + of the electronic

insert. The electronic insert has built-in

polarity protection. The black ground wire

in the probe is always connected to

Terminal 3.

Warning!

•When using the probe in explosion-hazardous areas, ensure that the type and

routing of the intrinsically safe power and signal line is in accordance with the

certificate and local regulations.

•See the certificate of conformity for maximum permissible values for capacitance

and inductance.

Note!

After connection, ensure that the cover is screwed down securely and that the cable

gland of the probe housing is screwed tight.

134

FEC 12

✔

- +

Fig. 3

Connecting the

FEC 12 electronic insert to the

power supply

4...20 mA

EX EX

min 230 Ω

230 Ω

min

134

FEC 12

✔

transmitter

power supply unit

Control room

Not permitted

with protection

Ex d

Field

follow-up units or e.g.

communications resistor

Fig. 4

Connecting the handheld terminal

to the load or power cable

Warning!

Note!

2 Installation Electronic insert FEC 12 (HART)

4Endress+Hauser

Load for handheld

terminal

A load should be connected into the power cable when connecting a handheld

terminal. The handheld terminal can now be connected at any point along the power

cable for communication with the electronic insert. The size of the load is given in the

following table.

FEC 12 electronic insert Load resistance

minimum Load resistance

maximum (UB=30V)

Version HART 230 Ω720 Ω

Without communication 0 Ω720 Ω

Maximum cable length: 1000 m.

Maximum capacitance for screened cabling: 100 nF.

2.2 Technical Data

Construction

Power Supply

Load

Capacitance Ranges

Analogue Output

Output damping

Accuracy

Communication Interface

Additional Signal Output

Environmental Conditions

Weight : approx. 170 g

Housing: plastic, potted electronics,

Colour: light grey RAL 7035, protection to DIN 40050: IP 20

Interlock diode with jumper: 13.0 V ... 30 V,

With Interlock diode: 13.8 V ... 30 V

for Ex d with Zener diode module: 13.8 V ... 30 V

Permissible superimposed AC voltage (50 Hz ... 400 Hz): 100 mVpp

Without communication: 3 % of power supply voltage,

No understepping of minimum voltage!

Integrated polarity protection

Current consumption 3.8 ... 22 mA

Load for HART: 230 ... 720 Ω,

Without communication: 0 ... 720 Ω

Initial capacitance (‘offset’) for empty vessel

(probe free): 0 pF ... 350 pF

Change in capacitance (‘span’) for full vessel

(probe covered): 10 pF ...2000 pF

Total capacitance resulting from initial capacitance plus

change in capacitance: maximum 2000 pF

Output signal: superimposed direct current

for initial capacitance: 4 mA

for total capacitance: 20 mA

Resolution: 14 µA

Alarm signal for error indication (can be switched off):

22 mA ±0.1 mA, to NAMUR

Adjustable time constant: 0 ... 40 s

Factory set: 1 s

Output current from power supply voltage:

smaller than 0.05 % / V of full scale value at 24 V

Output current from load:

smaller than 0.1 % / 100 Ωof full scale value at 24 V

Type of signal: quasi-sine curve superposed on measuring current

without DC component

With Interlock diode: for ammeter

According to DIN 40040, HOE, condensation not permitted

Permitted ambient temperature:

Nominal operating range: 0 ... +70 °C

Limiting operating range: -20 ... +80 °C

Storage temperature: -40 ... +85 °C

Protection against electrostatic build-up: up to 15 kV

RFI immunity (depending on type of housing): up to 10 V/m

Electromagnetic Compatibility:

Interference Emission to EN 61326; Electrical Equipment Class B

Interference Immunity to EN 61326; Annex A(Industrial) and

NAMUR Recommendation EMC (NE 21)

16 87

4...20 mA

234

FEC 12

✔

protective cover

Fig. 5

Construction and dimensions of

the FEC 12 electronic insert

Electronic insert FEC 12 (HART) 2 Installation

Endress+Hauser 5

3 Operating Elements

This Section describes the operating elements of the electronic insert. It also

describes the menu structure of the HART protocol used with the Universal HART

Communicator DXR 275.

3.1 FEC 12 Electronic Insert

The operating elements of the electronic insert are protected by a cover. This can be

raised by inserting a small screwdriver into a slit at the edge. The inside of the cover

has symbols printed on it that serve as a quick operating manual.

Switches The lefthand switch selects whether the linearisation is to be carried out remotely with

the handheld terminal or locally with the FEC 12 operating elements. If linearisation at

the FEC 12 is required, then one of two stored linearisation modes in the electronic

insert is activated (vertical vessel with linear characteristics or horizontal cylinder) at

the righthand switch.

Pushbuttons Calibration, locking and reset to factory-set values are carried out at the FEC 12 by

using the four pushbuttons (see Section 4).

Basic Operation:

The pushbuttons marked with (+) increase current and those marked (-) decrease

current. Punching the pushbuttons produces a step-wise change. The smallest

resolution possible is 0.014 mA. If the pushbutton is pressed continuously, then the

current also changes continuously until the pushbutton is released. The change

begins slowly and gradually increases in speed and so quickly passes through a

wide range. Just before reaching the value required, the pushbutton should be

released and the procedure completed by punching the pushbutton for fine

resolution. If the value required is overrun, then correct for it by pressing the

pushbutton for the other direction.

4...20 mA

234

FEC 12

✔

pushbuttons,

e.g. for empty

calibration

switch for

selecting local

or remote

linearisation

switch for

the type of

linearisation

pushbuttons,

e.g. for

full calibration

green LED:

indicates

successful

calibration connection for

ammeter

lid with short instructions

Fig. 6

Operating elements on the

FEC 12 electronic insert

3 Operating Elements Electronic insert FEC 12 (HART)

6Endress+Hauser

3.2 HART Communicator DXR 275

When the lefthand switch is set to remote linearisation (arrow symbol), the FEC 12

electronic insert can be calibrated using the HART Communicator handheld terminal.

The terminal communicates with the electronic insert over the power/signal cable. The

operating manual for the HART Communicator describes its operation. Some

knowledge of operating the HART Communicator is assumed for the following

section.

Note!

When calibrating the FEC 12 electronic insert, the following sections will assume the

operating steps given below. They apply to all instructions and will, therefore, no

longer be given in this manual:

•First step: Move from the "MATRIX GROUP SEL." menu to the next higher menu with the

→arrow key.

•Last step: Return to the "Online" menu with F3 [HOME].

3.3 HART Menu Structure

All parameters of the FEC 12 can be addressed by the menu structure using the

handheld terminal. The following diagram shows the menu structure of the HART

protocol for the FEC 12 electronic insert. Each field in the menu structure can be

selected using the arrow or numeric keys on the handheld terminal.

Note!

USER INFORMATION

1 SET TAG NUMBER

2 SERIAL NUMBER

3 MEASURING RANGE

4 C AT EMPTY CAL.

5 C AT FULL CAL.

6 SELECT UNIT

7 OFFSET OF DEVICE

8 SENSIT. OF DEVICE

HOME

EXTENDED CAL.

1 LINEARISATION

2 OFFSET

3 SENSITIVITY

4 TEMPERATURE UNIT

5 MEASURED TEMPERATURE

6 MIN. TEMPERATURE

7 MAX. TEMPERATURE

8 SECURITY LOCKING

HOME

CALIBRATION

1 MEASURED VALUE

2 EMPTY CALIBRATION

3 FULL CALIBRATION

4 MIN: CURRENT 4 mA

5 OUTPUT DAMPING

6 VALUE FOR 4 mA

7 VALUE FOR 20 mA

8 SAFETY ALARM

9 CAPACITANCE

CURRENT

HOME

SERVICE/SIMULATION

1 DIAGNOSTIC CODE

2 LAST DIAGNOSTIC

3 SOFTWARE NO.

4 DEFAULT VALUES

5 SIMULATION

6 SIM. LEVEL

7 SIM. VOLUME

8 SIM. CURRENT

HOME

MATRIX GROUP SEL.

1 CALIBRATION

2 EXTENDED CAL.

3 SERVICE/SIMULATION

4 USER INFORMATION

HOME

From "Online" menu«

Fig. 7

Menu structure for the HART

Communicator handheld terminal

Electronic insert FEC 12 (HART) 3 Operating Elements

Endress+Hauser 7

4 Calibrating

This section deals with the basic settings necessary for the electronic insert to

convert capacitance values into correct data on level or volume, which can then be

shown on a display unit (e.g. meter or handheld terminal).

The electronic insert can carry out basic settings in two ways:

•On site at the electronic insert itself or

•On the handheld terminal.

The initial basic settings can also be carried out locally at the electronic insert and

then later with the handheld terminal for, e.g. setting the type of linearisation

(Note: the electronic insert must not be locked).

Note!

•After completing calibration the matrix should then be locked (see Section 5.1).

After locking, all entries can be called up and displayed but no longer changed.

•The values entered can be written in the table below so that the identical values can

again be entered if the electronic insert is replaced. A complete recalibration is not

then required (see also Section 6).

4.1 Basic Calibration at the FEC 12 Electronic Insert

The following entries are required for basic calibration of the electronic insert:

•Type of linearisation

•Empty calibration

•Full calibration

Note!

•If an initial calibration is not to be carried out, but instead a recalibration of the

system, then a reset the electronic insert first.

•This also applies when it is not clear if the electronic insert is calibrated with factory

settings (see following section). Unwanted settings may result and lead to incorrect

measured values.

Reset (recall of factory

settings) Press the pushbuttons for empty calibration (-) and for full calibration (-)

simultaneously for approx. 5 s. This produces the following factory settings:

Significance Factory settings Entered values

Empty calibration [%] 0.0

Full calibration [%] 100.0

Min. current 4 mA off

Output damping [s] 1

Value for 4 mA [%] 0.0

Value for 20 mA [%] 100.0

Safety alarm max (110 %)

Linearisation linear

Offset [pF] 349.90

Sensitivity [pF/%] 16.49

Set tag number ’--------’

Select unit %

Note!

4 Calibrating Electronic insert FEC 12 (HART)

8Endress+Hauser

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