Endress+Hauser FEC 12 User manual

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
5
FEC 12
✔
✔
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
5
FEC 12
✔
✔
12
I
OI OI O
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)
67
49
16 87
1
4...20 mA
234
5
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.
1
4...20 mA
234
5
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
1
2
3
4
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!
Note!
4 Calibrating Electronic insert FEC 12 (HART)
8Endress+Hauser