Kobold NRM User manual

Operating Instructions
for
Non-Contact Radar Level Transmitter
Model: NRM

NRM
page 2 NRM K06/0422
We don’t accept warranty and liability claims neither upon this publication nor in
case of improper treatment of the described products.
The document may contain technical inaccuracies and typographical errors. The
content will be revised on a regular basis. These changes will be implemented in
later versions. The described products can be improved and changed at any time
without prior notice.
© Copyright
All rights reserved.
1. Contents
1.Contents ........................................................................................................ 2
2.Note .............................................................................................................. 4
3.Instrument Inspection .................................................................................... 4
4.Regulation Use ............................................................................................. 4
5.Operating Principle ........................................................................................ 5
6.Installation ..................................................................................................... 6
6.1Mounting .............................................................................................. 6
7.Wiring ............................................................................................................ 9
7.1Wiring of the devices ......................................................................... 10
7.2Determine the appropriate power supply voltage ............................... 11
7.3Loop current checking with hand instrument ...................................... 12
8.Programming .............................................................................................. 12
8.1The NRM-300P display unit ............................................................... 13
8.2Programming with the NRM-300P display module ............................ 16
8.3Programmable features description ................................................... 18
9.Error Codes ................................................................................................. 28
10.NRM Parameter table ................................................................................. 29
11.Menu map ................................................................................................... 30
12.Explosion protection, Ex-marking, Ex limit data .......................................... 32
13.Conditions of safe operation ....................................................................... 33
14.Maintenance ............................................................................................... 33
15.Technical Information .................................................................................. 34
16.Order Codes ............................................................................................... 35
17.Dimensions ................................................................................................. 37
18.EU Declaration of Conformance ................................................................. 40
19.EU Declaration of Conformance (ATEX) ..................................................... 41
20.ATEX certificate .......................................................................................... 43
21.IECEx certificate .......................................................................................... 50

NRM
NRM K06/0422 page 3
Manufactured and sold by:
Kobold Messring GmbH
Nordring 22-24
D-65719 Hofheim
Tel.: [phone]
Fax: [phone]
E-Mail: [email protected]
Internet: www.kobold.com
Edition: August 2017 (Revision 3)

NRM
page 4 NRM K06/0422
2. Note
Please read these operating instructions before unpacking and putting the unit into
operation. Follow the instructions precisely as described herein.
The instruction manuals on our website www.kobold.com are always for currently
manufactured version of our products. Due to technical changes, the instruction
manuals available online may not always correspond to the product version you
have purchased. If you need an instruction manual that corresponds to the
purchased product version, you can request it from us free of charge by email
([email protected]) in PDF format, specifying the relevant invoice number and
serial number. If you wish, the operating instructions can also be sent to you by
post in paper form against an applicable postage fee.
The devices are only to be used, maintained and serviced by persons familiar with
these operating instructions and in accordance with local regulations applying to
Health & Safety and prevention of accidents.
When used in machines, the measuring unit should be used only when the
machines fulfil the EC-machine guidelines.
3. Instrument Inspection
Instruments are inspected before shipping and sent out in perfect condition.
Should damage to a device be visible, we recommend a thorough inspection of the
delivery packaging. In case of damage, please inform your parcel service /
forwarding agent immediately, since they are responsible for damages during
transit.
Scope of delivery:
The standard delivery includes:
 Non-Contact Radar Level Transmitter model: NRM
4. Regulation Use
Any use of the Non-Contact Radar Level Transmitter, model: NRM, which exceeds
the manufacturer’s specification, may invalidate its warranty. Therefore, any
resulting damage is not the responsibility of the manufacturer. The user assumes
all risk for such usage.

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NRM K06/0422 page 5
5. Operating Principle
The reflection of the emitted microwave impulses is considerably depending on the
relative dielectric constant of the measured medium. The essential condition of
microwave level measurement is that the relative dielectric constant (εr) of the
medium should be more than 1.9.
The operation of the non-contact microwave level transmitters is based on the
measurement of the time of flight of the reflected signals, so-called Time Domain
Reflectometry (TDR) method.
The propagation speed of microwave impulses is practically the same in air, gases
and in vacuum, independently from the process temperature and pressure, so the
measured distance is not affected by the physical parameters of medium to be
measured.
The NRM level transmitter is a Pulse Burst Radar operating at 25 GHz (K-band)
microwave frequency.
The 25 GHz models’ most noticeable advantage over the lower frequency
(5-12 GHz) radars are the smaller antenna size, the better focusing, lower
dead-band and smaller transmission angle.
The level transmitter induces few nanosecond length microwave impulses in the
antenna and a part of the energy of the emitted signals reflects back from the
measurement surface depending on the measured media. The time of flight of the
reflected signal is measured and processed by the electronics, and then this is
converted to distance, level or volume proportional data.

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page 6 NRM K06/0422
6. Installation
6.1 Mounting
When choosing the installation place please ensure proper space for later
calibrations, verification or maintenance service.
PLACEMENT
The ideal position for the NRM is on the
r = (0.3 … 0.5) R (in case of cylindrical tank).
It is highly recommended to consider the beam
cone. The distance between the sensor and the
tank wall should be at least 200 mm.
If the unit is installed into dome top or spherical
tank, unwanted multiple reflections may appear,
which can cancel each other and the measuring
signal out, this way it can interfere the
measurement.
r
R
MOVING LIQUID SURFACE
Waving, vortex or strong vibration effects can
have negative influence on the measurement
accuracy and the maximal measuring range. To
avoid these effects, the mounting placement
should be as far as possible from the sources of
these disturbing effects. According to
measurement experiences the maximal
measuring distance may decrease by 50-70%
when the liquid surface is vortexing. For this
reason the device should be mounted as far as
possible from the filling stream or the tank outlet.
FOAMING
Filling, stirring or any other
processes in the tank can generate
dense foams on the liquid surface,
which may considerably damp the
reflected signals.
According to measurement
experiences, in these cases the
maximal measuring distance
decreases at least approximately
b
y
50%.
FUMES, VAPOURS
If the measured medium or its
foam can reach the antenna
or the measured medium is
highly fuming, these cases
build-ups can form on the
sensor, which may result
unreliable level
measurement.

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NRM K06/0422 page 7
SENSOR ALIGNMENT
The antenna face should be parallel to
the medium surface within  2-3°.
TEMPERATURE
To avoid
overheating the
instrument should
be protected
against direct
sunshine.
Á
rnyékoló tető
OBSTACLES
Prior to the installation make sure that
no objects (cooling pipes, bracing
elements, thermometers, etc.) cross the
microwave signals. Especially in case
of extraordinary large silos bracing
elements and other structural obstacles
may cause false reflections which can
be damped in most cases: a small bent
metal deflector plate mounted above
the obstacle can disperse the
microwave signals and eliminates the
false reflections which disturb the
reliable measurement.
If there is no possible mechanical
solution to avoid these kinds of false
reflections, the programming of the
instrument allows blocking out the
obstacles. (see: 8.3.4.5)
POLARIZATION
PLANE
The emitted radar impulses
of NRM are electromagnetic
waves. The orientation of
the polarization plane is the
same as for the electric
wave component of the
electro-magnetic wave. The
rotation of the polarization
plane compared to the tank
position could be useful (for
example to avoid disturbing
reflections) in certain
applications. To rotate the
polarization plane loosen
the M6 hex socket set screw
above the process
connection and rotate the
instrument. Then tighten the
unit b
y
the screw.
M6/Sw.3

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page 8 NRM K06/0422
EMPTY TANK
Especially in case of standing tanks
with hemispherical bottom and in case
of tanks which have any equipment
inside at the bottom (e.g. heating
element, stirrer) wrong level
measurement may happen when the
tank is totally emptied. The reason for
this measurement error is that the tank
bottom or the objects at the bottom
disperse or reflect the emitted
microwave signals. Furthermore the
lower signal-level dispersed radar
impulses may interfere with itself inside
the tank.
In order to perform reliable level
measurement there should be at least
100 mm liquid level above the
disturbing objects at the bottom or
above the hemispherical tank bottom.
SOCKET, NOZZLE
The process connection should be
implemented that the antenna end should
protrude at least 10 mm out of the socket.
>10mm >10mm

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NRM K06/0422 page 9
7. Wiring
The instrument operates from 20 … 36 V galvanic
isolated and not grounded DC power supply in two-
wire system. (For Ex version: 20 … 30 V DC!)
The voltage value measured on the terminal of the
instrument should be minimum 20 V (in case of 4 mA)!
In case of using HART interface – to achieve proper
communication between the transmitter’s interface
and the power-supply – a minimal 250 Ohm resistance
should be maintained within the network. The
instrument should be wired with shielded cable led
through the cable gland. The wiring of the cables can
be done after removing the cover of the instrument
and the NRM-300P display unit.
IMPORTANT: The grounding screw on the housing of
the transmitter should be connected to the
equipotential network. Resistance of the EP network
should be R  2 Ohm measured from the neutral point.
Shielding of the cable should be grounded at the
control room side to the EP network. To avoid
disturbing noises, keep away of closeness to high-
voltage cables. Especially the inductive couplings of
AC harmonics can be critical (which are present at
frequency converter control) because even cable
shielding does not supply effective protection against
these cases.
234561
1/2” NPT
Display unit
connector
Loop current
measuring connector
4...20 mA
(HART)
loop current
and supply
GND
1/2” NPT
M20x1,5
M20x1,5
3425
U-+
The instrument may be damaged by electrostatic discharge (ESD) via its
terminal, thus apply the precautions commonly used to avoid electrostatic
discharge e.g. by touching a properly grounded point before removing the
cover of the enclosure.
A possible electrostatic discharge can cause damage for the instrument. Do
not touch the internal terminals!

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page 10 NRM K06/0422
WATER / VAPOUR
To achieve suitable ingress protection Kobold
recommends using the suggested cable outer
diameter and fasten properly the cable gland.
Kobold also recommends leading the connecting
cables downwards to lead aside the rain water and the
condensed water. This is needed in case of outside
installations and some special applications where
there is very high humidity or the possibility of water
condensation is quite high (for example in cleaning,
purification processes, in cooled and / or heated
tanks).
7.1 Wiring of the devices
Using HART communication Using Ex approved instrument
In non-Ex environment in hazardous environment
In case of integrated version:
Prior to wiring ensure that the power supply is turned off at the source.
(For wiring the unit 6 x 0.5 mm2 cross section or greater cable is recommended).
The necessary programming can be made after energizing the unit.
Colour codes of the wires:
Green – (+) Positive point of current loop measurement
Yellow – (-) Negative point of current loop measurement
White – I (-) Negative point of current loop, power supply and HART
Brown – I (+) Positive point of current loop, power supply and HART
Green/Yellow – GND Grounding and shielding point

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NRM K06/0422 page 11
Power
supply
Power supply
+HART
+Current output HART modem
I
brow
n
white
green
green/
yellow R
yellow
TRANSMITTER
mA
V
200mV
Extension of the integrated cable:
The usage of a junction box is recommended for extending the cable.
The shielding of the two cables should be connected and grounded at the signal
processing device.
7.2 Determine the appropriate power supply voltage
The minimal power supply voltage required by the NRM devices is depending on
the load impedance in accordance to the below diagram:
22
21
20
19
18
17
16
15
14
13
12246810
12 14 16 18 20 22
19,1
13,6
B
A
Minimal supply voltage
on the input terminals
of the device
Minimal supply voltage
(considering the voltage drop
on the 250 Ohm loop resistor)
A: minimal supply voltage on the input
terminals of the device
B: minimal supply voltage (considering the
voltage drop on the 250 Ohm loop resistor)
Calculation example: Voltage drop calculated with 22 mA:
U minimal supply voltage (22 mA) = 22 mA x load resistance+ U input minimum (22 mA)
U minimal supply voltage (22 mA) = 22 mA x 250 Ohm + 9 V = 5.5 V + 13.6 V = 19.1 V
In order to provide operation in the total current loop range the calculation should
be also checked with 4 mA:

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page 12 NRM K06/0422
U minimal supply voltage (4 mA) = 4 mA x load resistance + U input minimum (4 mA)
U minimal supply voltage (4 mA) = 4 mA x 250 Ohm + 19 V = 1 V + 19 V = 20 V
Therefore in case of 250 Ohm load resistance 20 V power supply voltage is just
enough for the total 4-20 mA measuring range.
7.3 Loop current checking with hand instrument
After removing the cover and the Display Module, the actual loop current can be
measured throughout an internal 1 Ohm shunt resistor by connecting
a voltmeter (in the range of 200 mV) to the points 2 and 5 indicated on the wiring
drawing above (see 7.1)
8. Programming
The NRM transmitters can be programmed (basically) with the following two ways:
 Programming with the NRM-300P display unit (see 8.2)
All features of the unit can be accessed and all parameters can be set, such as
measurement configuration and optimisation, outputs, dimensions for 11 tanks with
different shape, 99-point linearization.
 Programming with NUS-NTB-NRM-SW configuration software (using
HART® modem e.g. HARTCOMM)
The NRM-4...1x and NRM-4...Hx types include the NRM-300P display unit.
The NRM transmitters are fully operational without the NRM-300P display as well;
it is only needed for local programming and / or local measurement displaying.
FACTORY DEFAULT SETTING
The NRM series level transmitters are factory programmed by the following way:
 Measurement mode: Level (LEV). The displayed value is the measured
level.
 The current output and the bargraph on the right are proportional to the
measured level.
 4 mA and 0% are assigned to zero level.
 20 mA and 100% are assigned to the maximal level.
 Error indication by the current output: holding the last value.
 Level tracking time constant: 15 sec.

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NRM K06/0422 page 13
The instrument regards the distance (DIST) measured from the antenna end as the
basic measurement value. This distance is handled and display in one of the
selected dimensions: m, cm, mm, feet, or inch. Since the maximal measurement
distance is given (entered in P04) the instrument can calculate the actual level
(LEV) value. If the proper mechanical dimensions of the mounting – distance
between the sealing and the tank bottom – is known, the measured level values
can be more accurate by adding this data. The level values calculated that way are
the base for volume (VOL) calculation and the 99-point linearization table (VMT)
also uses these values as input data.
8.1 The NRM-300P display unit
8.1.1 Primary measurement screen
The NRM-300P is a 64x128 dot-matrix LCD display which can be plugged into the
transmitter. (It is universal – usable in other Kobold devices as well – provided that
the system software supports NRM-300P.)
Warning! The NRM-300P module is based on LCD technology, so please
make sure it is not exposed to permanent heat or direct sunlight, in order to
avoid damage of the display unit. If the instrument cannot be protected
against direct sunlight or high temperature that is beyond the standard
operating temperature range of the NRM-300P, please do not leave the NRM-
300P display in the instrument.
Measurement displaying with the NRM-300P display unit
Elements of the displaying:
1. Primary (Measured) Value (PV), in accordance to BASIC
SETUP / PV. MODE.
2. Calculation mode of Primary Value (PV), in accordance
to BASIC SETUP / PV. MODE.
3. Type and value of the initial quantity used for calculating
the Primary Value (PV):
- in case of Level measurement (LEV) it is
Distance (DIST),
- in case of Volume measurement (VOL) it is
Level (LEV).
4. Trend direction arrows. The empty triangle
shows when the change of the measured value is
small, the filled triangle shows large-scale
change. If none of the arrows are shown the
measured value is constant.
5. Measured PV (Distance Value) in relation to
measurement range (Sensor range) displayed in
a bargraph.

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page 14 NRM K06/0422
6. Indication of Primary Value simulation. In this case the display and output show
the values of the simulation and not the measured values.
7. Indication of active (Volume / Mass Table - VMT) calculation mode.
During active simulation the critical measurement errors will be displayed to give
information to the user.
A, Calculated value of the output current.
After the dimension, the mode of current output is indicated by inverse inscription:
M
Manual mode (see 8.3.2.1)
H
HART address is not 0, so output current has become overwritten to 4 mA (see
8.3.2.1)
E
!
Analogue transmission reacts to a programmed failure condition
if an upper or lower fault current is programmed (see 8.3.2.4)
B, Output range (4-20 mA) indicated in a bargraph.
The bottom of the bargraph is assigned to 4 mA and the top is assigned to
20 mA.
C, Indication of Menu Lock:
 If key symbol is visible, the unit is protected with a password. When entering the
menu, the instrument asks for the correct password (see 8.3.6.1).
 If REM message is visible, the instrument is in remote programming mode and
the main menu cannot be accessed.
Errors occurred during the measurement can be seen at the bottom line of the
display.

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NRM K06/0422 page 15
8.1.2 Information screens
Press button to cycle between the main
measurement screen and the information display
screen:
1. General information screen (DEV. INFO)
Overall running time (OV. RUN TIME)
Run time after power on (RUN TIME)
Type of interface (INTERFACE) in the instrument.
Type of the instrument (TYPE)
2. Sensor information screen: (SENSOR INFO)
Number of echoes (ECHO TOT/SEL)
Blocking (BLOCKING)
Signal-to-noise ratio (SN)
Temperature (TEMP)
3. Echo table: (ECHO TABLE)
The location (distance) and the amplitude of the
echoes (Dist. / Amp.) are listed
The listed items are the reflections detected by the
NRM (measured in dB) and the approximate
distance from the process connection. The listed
values are not accurate measurement values, since
around the selected echo (measurement window)
there are further measurements and signal
processing procedures in order to provide accurate
measurement display and level transmission.
The informative screen returns back to main screen after 30 seconds. By pressing
the button the user can return to the main screen any time. Pressing the
E
button in any of the screens the user can enter the main menu. After exiting the
menu always the main screen will be shown.

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page 16 NRM K06/0422
8.1.3 Echo map
Pressing the button in the measurement
screen the echo map screen will appear. This
screen shows the following information:
1. Echo diagram
2. Actual measured distance
3. Maximal measuring range
The echo map screen returns back to main
screen after 30 seconds.
By pressing the button the user can return to
the main screen any time. Pressing the
E
button
in any of the screens the user can enter main
menu. After exiting the menu always the main
screen will be shown.
8.2 Programming with the NRM-300P display module
When entering the menu the instrument makes a copy of the actual parameters
and all changes are done to this duplicated parameter set. During programming the
instrument keeps measuring and transmitting with the current (and intact)
parameter set. After exiting the menu the instrument replaces the original
parameters with the new parameter set and will measure according to the new
parameters. This means that the change of the parameters does not become
immediately effective when pressing the
E
button!
Entering the menu can be done by pressing the
E
button, while exiting the menu
can be done by pressing the button.
If the instrument is left in programming mode after 30 minutes it will automatically
return to measuring mode. If the NRM-300P display is removed during
programming the instrument immediately returns to measuring mode.
As programming with NRM-300P (manual programming) and HART (remote mode)
programming is not possible at the same time, only one programming method
could be chosen. Measured values can be read out through HART at any time.
8.2.1 Components of the programming interface
The parameters of the instrument are grouped according to their functions. The
programming interface consists of lists, dialog windows, edit windows and report
windows.

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NRM K06/0422 page 17
Lists
Navigation between the lines of a list can be done by pressing the / buttons.
Pressing the
E
button activates a list item. The selected list item is marked with
inverse colour. Exit from a list by pressing the button.
Menu list
The Menu list is a specialized list. Its characteristic
is that upon selecting a list item we directly get into
another list, and these lists are opening from each
other in different levels.
The menu header (1) helps to navigate.
Entering the main menu can be done by pressing
the
E
button. Navigation between the menu items
can be done by pressing the / buttons. Enter to the selected menu by pressing
the
E
button. The selected list item is marked with inverse colour.
Exit from a submenu by pressing the button. Pressing the button in the main
menu will quit from the programming mode and the instrument will return to
measuring mode.
Dialog window
During the programming the system sends messages or
warnings to the users by dialog windows. These usually can
be acknowledged by pressing the button or the user can
choose between two options (usually YES or NO) by pressing
the / buttons. In some cases one of the parameters has to
be changed to correct an error.
Edit window
An edit window is used for modifying a numeric parameter
value. The selected character can be changed by pressing the
/ buttons. The cursor can be moved to left, by pressing
the button.
The direction of the cursor movement through the digits is
right to left. The changed value can be validated by pressing
the
E
button. The software checks if the entered value is
appropriate, exiting from the edit window is only possible after
entering a correct value. If the entered value is uninterpretable
the software sends an error message in the bottom line (1) of
the display.
Edit window – button combinations
In the edit window the following button combinations are available:
1. Recalling the parameters to the state before editing ( + , pressed for 3 sec.)
2. Recalling default parameters ( + , pressed for 3 sec.)
Inserting (currently) measured value to the edit window ( + , pressed for
3 sec.)
Only for certain parameters!

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page 18 NRM K06/0422
8.2.2 Menu structure
Main menu
BASIC SETUP Parameter
g
roup of the basic measurement parameters
OUTPUT SETUP Parameter
g
roup of the output parameters
OPTIMIZATION Parameter
g
roup for measurement optimization settin
g
s
CALCULATION Calculations
SERVICE Service functions, calibration, test and simulation
8.3 Programmable features description
8.3.1 Basic measurement settings
8.3.1.1 Default unit system
Parameter: P00: c, where c: 0, 1.
D
efault value: EU
Path: BASIC SETUP / UNITS / ENGINEERING SYSTEM
Description: This should be configured as the first step of the
programming.
Here you can choose the default unit system:
 EU European unit system
 US
A
n
g
lo-Saxon / American unit s
y
stem
8.3.1.2 Dimension of the fault unit system
Parameter: P00:b, and P02:b, or P02:c
D
efault value: mm, m3,
t
Path: BASIC SETUP / UNITS / ENGINEERING UNITS
Description: The dimension of the selected default unit system can
be specified in this menu. The selected measurement
mode here will define the primary measured value and
the displayed value, furthermore it will be the source for
the current output:
 BASIC UNITS (m, cm, mm, ft, inch )
 VOLUME / FLOW UNITS (m3, l, ft3, gallon )
 MASS UNITS (t, t)
If the dimension is modified, the device resets all the parameters after a warning
message.
8.3.1.3 Primary value mode
Parameter: P01: b a Default value: DIST
Path: BASIC SETUP / PV MODE
Description: This mode determines the primary value and the
displayed value. It also determines the value which will
be proportional to the output current.
 DISTANCE
 LEVEL
 VOLUME
 MASS

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NRM K06/0422 page 19
8.3.1.4 Maximal measuring distance
Parameter: P04 Default value:
Path: BASIC SETUP / MAX. MEAS.DIST
Description: This parameter should be entered all the cases, except
distance measurement mode. But it is suggested to be
programmed in case of distance measurements in order
to avoid the disturbing effects of possible unwanted
multiple reflections!
8.3.1.5 Damping time
Parameter: P20 Default value: 15 sec
Path: BASIC SETUP / DAMPING TIME
Description: Damping time is used to damp the unwanted
fluctuations of the output and display.
If the measured value changes rapidly the new value will
settle with 1% accuracy after this set time. (Damping is
accordin
g
to the exponential function
)
.
8.3.1.6 Demo mode
Parameter: P00: d Default value: OFF
Path: BASIC SETUP / DEMO MODE
Description:  OFF: The operation is performed with considering
all the application parameters (such as filling,
emptying speed, echo selection, etc..)
 ON: This fast operation mode ignores the
application parameters. The demo mode uses a
fast algorithm evaluation independently from P25,
P26 and P27 parameters. The measurement
accuracy and reliable operation between process
environments are not
g
uaranteed!
8.3.2 Analogue output
8.3.2.1 Output current mode
Parameter: P12:b, where b: 0, 1. Default value:
A
UTO
Path: OUTPUT SETUP / ANALOG OUTPUT / CURRENT
MODE
Description: Transmission mode of the current output.
 AUTO The output current is calculated from the
measured value, output is active.
 MANUAL The output current is fixed at a
constant (set) value (see 8.3.2.5). In this
mode the setting of the error current is
irrelevant. The set (current) value overwrites
the 4mA output of HART multidrop mode!

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page 20 NRM K06/0422
8.3.2.2 Output current value assigned to 4 mA
Parameter: P10 Default value: 0 mm
Path: OUTPUT SETUP / ANALOG OUTPUT / 4 mA VALUE
Description:  Measured value assigned to 4 mA current value.
 The transmitted value is in accordance to the
primary value (PV) (P01:a). Assignment can be
done that the change in measured value and the
change in the output value are the same
(normal), or opposite directional (inversive
operation). For example; 1 m level is 4 mA, 10 m
level is 20 mA, or 1 m level is 20 mA and 10 m
level is 4 mA.
8.3.2.3 Output current value assigned to 20 mA
Parameter: P11 Default value:
Path: OUTPUT SETUP / ANALOG OUTPUT / 20mA VALUE Maximal measurement
ran
g
e
(
mm
)
Description: Measured value assigned to 20 mA current value.
The transmitted value is in accordance to the primary
value (PV) (P01: a). Assignment can be done that the
change in measured value and the change in the output
value are the same (normal), or opposite directional
(inverse operation). For example: 1m level is 4 mA, 10m
level is 20 mA, or 1m level is 20 mA and 10m level is 4
mA.
8.3.2.4 Output current error mode
Parameter: P12:a, ahol a: 0, 1, 2 Default value: HOLD
Path: OUTPUT SETUP / ANALOG OUTPUT / ERROR MODE
Description: Error indication by the current output:
 HOLD Error indication has no effect on the output
current.
 3.8 mA Error indication: the output current gets
3.8 mA.
 22 mA Error indication: the output current gets
22 mA.
Warning: This error indication is active unless the
failure is fixed, or until the failure terminates.
8.3.2.5 Fixed output current
Parameter: P08 Default value: 4 m
A
Path: OUTPUT SETUP / ANALOG OUTPUT / MANUAL
VALUE
Description: Parameter for setting the fixed output current:
Values between 3.8 and 20.5 can be entered. The
output current will be set to the entered value and
analogue transmission will be suspended (see 8.3.2.1).
This error indication overrides all other error indication.