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

Selecting linearisationTwo types of linearisation can be selected:
•Vessel characteristics as linear
•Vessel characteristics as a horizontal cylinder
Use the lefthand switch to select whether linearisation is to be carried out at the
electronic insert or by the handheld terminal. If the switch is moved to the right, then
linearisation is carried out at the electronic insert. The handheld terminal cannot now
change the setting. If the switch is moved to the left, then linearisation must be carried
out with the handheld terminal and the switch on the right remains inactive.
Select the type of linearisation for local calibration using the righthand switch. When it
is moved to the left, then the level (output current) is proportional to volume, i.e. the
cross-section of the vessel should be constant over its entire length. When it is moved
to the right, then linearisation is set for a horizontal cylinder, and the measured value
supplied corresponds directly to a percent of full volume.
Empty calibrationWith the vessel empty (0 %) both pushbuttons on the left (-) and (+) are pressed
simultaneously in order to set the signal current to the 4 mA lower value. The green
LED lights up to acknowledge that the setting has been accepted. Only when the
green LED goes out is the correct current value of 4 mA shown on the ammeter.
Full calibrationWith the vessel full (100 %) both pushbuttons on the right (-) and (+) are pressed
simultaneously in order to set the signal current to the 20 mA upper value. The green
LED lights up to acknowledge that the setting has been accepted. Only when the
green LED goes out is the correct value of 20 mA shown on the ammeter.
Alternative procedure:
calibration with the
vessel almost empty
In this case, the level of product in the vessel must be known as accurately as
possible and should not be too high. A level which is too high reduces the accuracy
of the zero point (corresponding to an empty vessel). An ammeter must be connected
to the electronic insert at Terminals 4 - 5.
Assuming that the level is at 15 %, the current value corresponding to a 15% level
must now be determined. The lower current value can be varied by pressing the two
pushbuttons on the left. The following calculation is used:
➀The lower current value (= empty vessel, 0 %) is 4 mA.
➁The upper current value (= full vessel, 100 %) is 20 mA.
➂This gives a measuring range (‘span’) of 16 mA for a change from 0 to 100 % or a
0.16 mA increase in current for every 1 % rise in level.
➃For a 15 % level, this is 15 % x 0.16 mA/% or 2.4 mA. This must be added to the
4 mA to give the current value required:
2.4 mA + 4 mA = 6.4 mA
➄The value 6.4 mA (check with the ammeter) is set by pressing the two pushbuttons
on the left. Pressing pushbutton (+) increases the current and pressing pushbutton
(-) decreases the current.
Note!
•No indication is given on the green LED when using this procedure.
•If the operating status is unclear due to an incorrect setting, then all settings should
be reset to factory-set values and the basic calibration carried out again. Note!
Electronic insert FEC 12 (HART) 4 Calibrating
Endress+Hauser 9

Alternative procedure:
calibration with the
vessel almost full
The level of the vessel must be known as accurately as possible and should be as
high as possible. A level which is too low reduces the accuracy of the upper point
(corresponding to a full vessel). An ammeter must be connected to the electronic
insert at Terminals 4 - 5.
Assuming that the level is at 90 %, the current value corresponding to a 90 % level
must now be determined. The upper current value can be varied by pressing the two
pushbuttons on the right. The following calculation is used:
➀The lower current value (= empty vessel, 0 %) is 4 mA.
➁The upper current value (= full vessel, 100 %) is 20 mA.
➂This gives a measuring range (‘span’) of 16 mA for a change from 0 to 100 % or
a 0.16 mA increase in current for every 1 % rise in level.
➃For a 90 % level this is 90 % x 0.16 mA/% or 14.4 mA. This must be added to the
4 mA to give the current value required:
14.4 mA + 4 mA = 18.4 mA
(The upper current value can also be used and
10 % x 0.16 mA/% = 1.6 mA is to be subtracted from 20 mA)
➄The value 18.4 mA (check with the ammeter) is set by pressing the two pushbut-
tons on the right. Pressing pushbutton (+) increases the current and pressing
pushbutton (-) decreases the current.
Note!
•No indication is given on the green LED when using this variation.
•If the operating status is unclear due to an incorrect setting, then all settings should
be reset to factory-set values and the basic calibration carried out again.
Locking the parameters Press simultaneously the pushbutton for empty calibration (+) and the pushbutton for
full calibration (-). The settings of the electronic insert can now be called up at any
time using the handheld terminal but not changed. This condition is indicated in the
handheld terminal by the appearence of the code 9999 in Menu Level 2 "EXTENDED
CALIBRATION", Field 8 "SECURITY LOCKING" (see Section 5).
Unlocking the
parameters Press simultaneously the pushbutton for empty calibration (-) and the pushbutton for full calibration (+). All settings of the electronic insert can now be called up and
changed using the handheld terminal. This condition is indicated in the handheld
terminal by the appearence of the code 12 in Menu Level 2 "EXTENDED CALIBRATION",
Field 8 "SECURITY LOCKING" (see Section 5).
Note!
4 Calibrating Electronic insert FEC 12 (HART)
10 Endress+Hauser

4.2 Basic Settings using the HART Communicator DXR 275
The FEC 12 allows calibration in % only. A remote calibration from the handheld
allows, e.g. technical units to be displayed. If a recalibration is to be carried out, then
a reset should be done first. The parameters of the electronic insert must not be
locked, see above!
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].
Reset (factory settings)
Step Entry Cursor in display at Significance
13 SERVICE/SIMULATION
2 4 DEFAULT VALUES
312 12 Code number for reset
4 F4
[ENTER] Confirms entry
5F2
[SEND] Value to be transmitted
The factory settings given on reset are shown in the following table:
Menu
field Significance Factory setting Values entered
1; 2 EMPTY CALIBRATION [%] 0.0
1; 3 FULL CALIBRATION [%] 100.0
1; 4 MIN. CURRENT 4 mA OFF
1; 5 OUTPUT DAMPING [s] 1
1; 6 VALUE FOR 4 mA [%] 0.0
1; 7 VALUE FOR 20 mA [%] 100.0
1; 8 SAFETY ALARM MAX (110 %)
2; 1 LINEARISATION LINEAR
2; 2 OFFSET [pF] 349.90
2; 3 SENSITIVITY[pF/%] 16.49
4; 1 SET TAG NUMBER ’--------’
4; 6 SELECT UNIT %
Note!
Electronic insert FEC 12 (HART) 4 Calibrating
Endress+Hauser 11

Selecting linearisation Two vessel characteristics are available: linear or horizontal cylinder
Note!
•The switch on the left on the FEC 12 electronic insert must be moved to the left
so that linearisation can be carried out remotely with the handheld terminal.
Step Entry Cursor in display at Significance
1 2 EXTENDED CALIBRATION Extended calibration
21 LINEARISATION Selecting linearisation
e.g. LINEAR Level is proportional to volume,
i.e. the cross-section of the vessel remains
constant over the entire distance
3HORIZ. CYL. Horizontal cylinder : the measured value
directly corresponding to volume
4 F4 [ENTER] Confirms entry, value to be transmitted
Empty and full
calibration Step Entry Cursor in display at Significance
1 1 CALIBRATION Basic calibration
22 EMPTY CALIBRATION Empty calibration
3 0.0 0.0 Vessel is empty, a 4 mA signal is output
at the entered level or volume
4 F4 [ENTER] Confirms entry, value to be transmitted
53 FULL CALIBRATION Full calibration
6 100.0 100.0 Vessel is full, a 20 mA signal is output
at the entered level or volume
7 F4 [ENTER] Confirms entry, value is transmitted
Note!
•You can also calibrate in technical units, see also 4 mA/20 mA value, p 13. In this
case, if a horizontal cylinder is selected, the entries must be made in volume units!
4.3 Extended Calibration using the HART Communicator 275
4 mA threshold The factory settings allow a current range from 3.8 mA to 20 mA and larger. Since a
current less than 4 mA could result in unwanted responses by process control
systems, it is possible to set a threshold of 4 mA on the current output, below which it
cannot fall.
Step Entry Cursor in display at Significance
1 1 CALIBRATION Basic calibration
24 MIN. CURRENT 4 mA Current output at minimum 4 mA
ON Threshold is at 4.0 mA
3 OFF Current range begins at 3.8 mA
4 F4
[ENTER] Confirms entry, value is transmitted
Note!
•At factory setting the 4 mA threshold is switched off
Note!
Note!
4 Calibrating Electronic insert FEC 12 (HART)
12 Endress+Hauser

Output dampingThe output damping is set in the factory at 1 s and affects the speed at which the
current output responds to a change in level. When there is a sudden jump from
empty to full in the vessel, after 1 s the current display reaches 63% or 14.08 mA of
the set point (1*output damping). After 5 s (5*output damping) it reaches 99 % or
19.84 mA. If a larger output damping is set, then these display times are
correspondingly longer.
The output damping can be selected between the range 0 and 40 s. For liquids, the
turbulence can cause the display to be unstable. Increasing the output damping with
the handheld terminal cancels this effect.
Step Entry Cursor in display at Significance
1 1 CALIBRATION Basic setting
2 5 OUTPUT DAMPING Setting the output damping
1 s (Factory setting 1 s)
3 e.g. 2 2 Sets the output damping to 2 s
4 F4 [ENTER] Confirms entry
5F2
[SEND] Value is transmitted
Value for 4 mAIf another value instead of 0 (= empty vessel) is to be displayed, then the value can
be entered here. The units are changed from % in the "SELECT UNIT" menu.
Step Entry Cursor in display at Significance
1 1 CALIBRATION Basic setting
26 VALUE FOR 4 mA Value for 4 mA
3 e.g. 20.0 20.0 Value is displayed if the current value is 4 mA
4 F4 [ENTER] Confirms entry
5F2
[SEND] Value is transmitted
Value for 20 mAIf another value instead of 100 (= full vessel) is to be displayed, then the value can be
entered here. The units are changed from % in the "SELECT UNIT" menu (see below).
Step Entry Cursor in Display at Significance
1 1 CALIBRATION Basic setting
27 VALUE FOR 20 mA Value for 20 mA
3 e.g. 80.0 80.0 Value is displayed,
if the current value is 20 mA
4 F4 [ENTER] Confirms entry
5F2
[SEND] Value is transmitted
Selecting unitsInstead of giving the results in %, the following units may be selected:
Level: cm dm m inch ft
Volume: l hl cm3 dm3 m3 ft3 us_gal i_gal
Weight: ton kg t lb.
Step Entry Cursor in display at Significance
1 4 USER INFORMATION User information
26 SELECT UNIT Select units
%
Factory setting
3 e.g.10x m3 Volume display in m3
4 F4
[ENTER] Confirms entry
5F2
[SEND] Value to be transmitted
Electronic insert FEC 12 (HART) 4 Calibrating
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5 Entries for the Measuring Point
5.1 Locking/Unlocking Parameters
Locking The parameters can be locked from the handheld terminal by entering a code
number between 1 and 11 or between 13 and 9998: all settings in the electronic insert
are protected from being altered. If the code number 9999 is shown in the display,
then locking has been activated at the electronic insert by pushbutton.
Step Entry Cursor in Display at Significance
1 2 EXTENDED CALIBRATION Extended calibration
28 SECURITY LOCKING Locking
12 No locking activated
3 e.g. 35 35 Selected code number for locking
4 F4 [ENTER] Confirms entry, valueis transmitted
With the exception of "SECURITY LOCKING" all fields can be viewed but not changed..
Unlocking Locking can be again cancelled by entering the code number 12. This does not apply
if the locking was activated at the electronic insert. This is indicated by the code
number 9999 in the menu field.
Step Entry Cursor in Display at Significance
1 2 EXTENDED CALIBRATION Extended calibration
28 SECURITY LOCKING Locking
e.g. 35 35 Selected code number for locking
312 12 Code number for unlocking
4 F4 [ENTER] Confirms entry, value to be transmitted
5.2 Tag Number
A measuring point number ("SET TAG NUMBER") can be assigned to the electronic insert
by using the handheld terminal. This consists of 8 ASCII characters. This measuring
point tag serves to identify different electronic inserts connected to the same power
line as every electronic insert has to have its own unique tag number.
Step Entry Cursor in Display at Significance
1 4 USER INFORMATION User information
21 SET TAG NUMBER Locking
3 e.g. LIC10 LIC10 Enter up to 8 characters
4 F4 [ENTER] Confirms entry, value is transmitted
5 Entries for the Measuring Point Electronic insert FEC 12 (HART)
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6 Diagnosis and Troubleshooting
6.1 Alarms
Output on alarmThe following response is set in the factory:
If the FEC 12 detects a fault, then the current output is set to 22 mA (=110 %) to
enable process control systems to, e.g. assume a response.
Alarm indicationIf no alarm indication is to be given on an alarm, then "CONTINUE" can be set. In this
case the FEC 12 continues to measure although the measured value is possibly
incorrect.
Step Entry Cursor in Display to Significance
1 1 CALIBRATION Basic setting
28 SAFETY ALARM Output on alarm
MAX (110%) Output jumps to 22 mA (=110 %), factory set
3CONTINUE Continue measuring, no alarm indication
4 F4 [ENTER] Confirms entry
5F2
[SEND] Value to be transmitted
6.2 Simulation
Simulation enables the current value coming from the electronic insert to be
simulated. It can be used for checking the correct processing of probe signals, e.g. in
a process control system. Simulation may also be necessary for tracing faults. No
change in level is required to produce a different current value. The various types of
simulation
•Level (LEVEL)
•Volume (VOLUME)
•Current (CURRENT)
are independent from one another and therefore none affects the others.
Note!
•If simulation is activated, Warning E 613 is displayed to indicate this.
•The full simulation range is only available with a free probe, only a limited range is
possible with a covered probe.
•On completion, switch off simulation again in order to continue normal measurement.
SimulationActivate simulation as follows:
Step Entry Cursor in Display at Significance
1 3 SERVICE/SIMULATION Service/Simulation
25 SIMULATION Simulation
OFF Simulation switched off
3 ON Simulation switched on
4 F4
[ENTER] Confirms entry, value to be transmitted
Note!
Electronic insert FEC 12 (HART) 6 Diagnosis and Troubleshooting
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Simulation for level Enter the level value to be simulated. The appropriate current is given by the
electronic insert.
Step Entry Cursor in Display at Significance
1 3 SERVICE/SIMULATION Service/Simulation
26 SIM. LEVEL Simulation for level
e.g. 77.06 Actual measured value is displayed
3 e.g. 35.00 35.00 Level to be simulated is entered
4 F4 [ENTER] Confirms entry, value to be transmitted
Simulation for volume Enter the volume value to be simulated. The appropriate current is given by the
electronic insert.
Step Entry Cursor in Display to Significance
1 3 SERVICE/SIMULATION Service/Simulation
27 SIM. VOLUME Simulation of volume
e.g. 77.06 Actual measured value is displayed
3 e.g. 5.00 5.00 Volume to be simulated is entered
4 F4 [ENTER] Confirms entry, value to be transmitted
Simulation for current Enter directly the current value to be simulated.
Step Entry Cursor in Display at Significance
1 3 SERVICE/SIMULATION Service/Simulation
27 SIM. CURRENT Simulation of current output
e.g. 17.02 Actual measured value is displayed
3 e.g. 8.00 8.00 Current to be simulated is entered
4 F4 [ENTER] Confirms entry, value to be transmitted
Note!
The values entered during simulation are stored until simulation is again switched off.
Note!
6 Diagnosis and Troubleshooting Electronic insert FEC 12 (HART)
16 Endress+Hauser

6.3 Description of Fault Responses, Error Messages
Error
code Significance
103 Initialisation activated
106 Check sum error
This appears during the download, and remians if the download is not completed
correctly. A new and successful download or reset deletes the error message.
116 Error in download format
204 Measuring capacitance too large (larger than 2000 pF)
613 Simulation switched on
615 The actual calibration at 4 mA produces an initial capacitance
larger than 350 pF. It cannot be altered further.
A reset deletes the error message.
616 The actual calibration at 20 mA produces a total capacitance
larger than 2000 pF. It cannot be altered further.
A reset deletes the error message.
617Theactualcalibrationproducesadifferenceincapacitance(’span’) oflessthan
10 pFbetweeninitialandtotalcapacitance.Itcannotbealteredfurther.
A reset deletes the error message.
618 Process-specific sensitivity too large
620 The current lies outside the permitted range (4.0 ... 20 mA or
3.8 ... 20 mA). It has no relationship to the measured value.
6.4 Replacing the FEC 12 Electronic Insert
Note!
If you want to transmit the settings of the old electronic insert into a new electronic
insert, then please note the following section.
Removal
•Disconnect the power supply cable from the old electronic insert
•Loosen the central mounting screw
•Remove the electronic insert
Insertion
•Plug in the new electronic insert
•Screw down the central mounting screw securely
•Connect the power cable to the electronic insert
6.5 Transmitting Basic Settings
The recalibration procedure can be dispensed when replacing an electronic insert.
Call up the setting for offset and sensitivity using the handheld terminal, replace the
electronic insert, and then enter both settings in the new electronic insert.
Calling up offset
and sensitivity
The offset value indicates zero point calibration and is given as the capacitance value
(initial capacitance). The value for sensitivity is the difference between the initial and
total capacitance (’span’) divided by 100.
Note!
Electronic insert FEC 12 (HART) 6 Diagnosis and Troubleshooting
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Calling up offset
and sensitivity (cont.) Step Entry Cursor in Display to Significance
1 2 EXTENDED CALIBRATION Extended calibration
22 OFFSET Offset of electronic insert
e.g. 63.43 Record value for offset
3F3
[ESC] OFFSET
4 3 SENSITIVITY Sensitivity of electronic insert
e.g. 2.02 Record value for sensitivity
5F3
[ESC] SENSITIVITY
Entering offset
and sensitivity Step Entry Cursor in Display to Significance
1 2 EXTEND. CALIBRATION Extended calibration
22 OFFSET Offset
63.43 63.43 Enter recorded value for offset
3F4
[ENTER] OFFSET Confirms entry
4 3 SENSITIVITY Sensitivity
2.02 2.02 Enter recorded value for sensitivity
5F4
[ENTER] SENSITIVITY Confirms entry
6F2
[SEND] Value to be transmitted
All settings can be transmitted from one electronic insert to another. Please see
following section.
6.6 Transmitting All Settings
All settings stored in an electronic insert can be transmitted to another electronic
insert using the HART Communicator handheld terminal. The procedure begins with
an upload with the data from the old FEC 12 to the handheld terminal. Once the
upload has been completed, a download is is made and all data are transmitted from
the handheld terminal to the new FEC 12.
Upload
(loading data into the
handheld terminal) Step Entry Display Significance
0 MATRIX GROUP SEL.
1 Online Higher menu level
23 Transfer Data transfer
Device to Memory Upload: Loading data into the memory
of the handheld terminal
31 Looking for a device Looking for an electronic insert
Save data from device
to configuration memory Ready for receiving data
4 F3 [SAVE] Overwrite existing
configuration memory Prompts confirmation
5F1
[YES] Device to Memory Data of the electronic insert now in
memory of handheld terminal
1 Set Tag Number 6 Value for 4 mA 11 Temperature Unit
2 Select Unit 7 Value for 20 mA 12 Descriptor
3 Output Damping 8 Linearisation 13 Message
4 Safety Alarm 9 Offset 14 Date
5 Min Current 4 mA 10 Sensitivity 15 Poll addr
Data loaded into the
HART Communicator
6 Diagnosis and Troubleshooting Electronic insert FEC 12 (HART)
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