Lamtec LT 2, KS1-DK Assembly And Commissioning Manual
Assembly and
Lambda Transmitter LT 2/KS1-DK
Commissioning Manual
LambdaTransmitter LT 2
Combination Probe KS1-DK
Simultaneous measurement of Oxygen (O2)
and oxidizing components (CO/H
Combination
probe KS1-DK
O
2
CO/H
)
2
2
RS 232
Analogue inputs
and outputs
(,
Operation
servicing
)
Option:
CANopen
Modbus
Profibus DP
Ethernet
CAN
Field bus
Digital inputs
and outputs
to other
LAMTEC
FMS / VMS / ETAMATIC
LT 1 / LT 2
devices
Sensors and Systems
for Combustion Engineering
Recording
LAMTEC SYSTEM BUS
Digital inputs
and outputs
Opti onal modules
Analogue inputs
and outputs
Table of Contents
1 General Information......................................................................................3
1.1 Compliance with the German law on device safety.................................................................. 3
2 Safety Information ........................................................................................4
2.1 Proper use, conditions for use..................................................................................................5
2.2 Permitted users......................................................................................................................... 6
2.3 Safety equipment / protective measures .................................................................................. 7
2.4 Environmentally responsible behaviour, disposal instructions ................................................. 8
3 Introduction...................................................................................................9
3.1 System overview....................................................................................................................... 9
3.2 Theoretical principles of measurement .................................................................................. 13
3.3 Probe method of functioning - O2-sensitive electrode ............................................................ 13
3.4 Probe method of functioning - CO/H2-sensitive electrode...................................................... 14
4 Technical Description ................................................................................16
4.1 Advantages of the LAMTEC measurement principle .............................................................16
4.2 Necessary components ..........................................................................................................16
4.3 Basic design of the LT 2/KS1-DK........................................................................................... 17
4.4 LT 2/KS1-DK........................................................................................................................... 18
4.5 Internal display and control elements of the LT 2/KS1-DK lambda transmitter ..................... 20
4.6 Display and operating unit ......................................................................................................22
4.7 Analogue output...................................................................................................................... 30
4.8 Digital inputs ........................................................................................................................... 31
4.9 LAMTEC SYSTEM BUS ......................................................................................................... 33
4.10 RS 232 interface .....................................................................................................................34
4.11 Cold start delay....................................................................................................................... 34
4.12 Optional extras........................................................................................................................ 35
4.13 Limit values............................................................................................................................. 43
4.14 Analogue inputs ...................................................................................................................... 48
4.15 Device configuration and factory settings............................................................................... 49
5 Installation...................................................................................................51
5.1 General Information ................................................................................................................ 51
5.2 Installing the electronic evaluation unit of the LT 2/KS1-DK lambda transmitter ...................51
5.3 Installing the probe ................................................................................................................. 55
6 Commissioning / Shutdown.......................................................................57
6.1 Switch on measurement ......................................................................................................... 57
6.2 Setting the cell internal resistance R
6.3 Setting the reference air quantity............................................................................................ 59
6.4 Calibration of the probe KS1-DK via menu function .................................................... 60
6.5 Ending calibration ................................................................................................................... 66
6.6 Test report ..............................................................................................................................67
6.7 Probe certificate...................................................................................................................... 68
6.8 Setting service warnings......................................................................................................... 69
6.9 Practical information for operation.......................................................................................... 69
6.10 Taking out of operation ........................................................................................................... 69
............................................................................... 58
I probe
1
Table of Contents
7 Service and Maintenance .......................................................................... 70
7.1 Checking/calibrating the KS1-DK combination probe.............................................................70
7.2 Checking the LT 2/KS1-DK.....................................................................................................71
7.3 Maintenance ...........................................................................................................................72
8 Fault Analysis/Trouble-shooting .............................................................. 75
8.1 Fault indicator via LED line in the LT 2/KS1-DK.....................................................................75
8.2 Warning indicator via LED line in the LT 2/KS1-DK ...............................................................78
8.3 Resetting faults/warnings........................................................................................................82
9 Spare Parts ................................................................................................. 83
9.1 Wearing parts..........................................................................................................................83
9.2 Spare parts .............................................................................................................................84
10 Appendix..................................................................................................... 86
10.1 Technical data of the LT 2/KS1-DK lambda transmitter .........................................................86
10.2 Technical data of the KS1-DK combination probe..................................................................89
10.3 Electrical connection...............................................................................................................90
10.4 Pneumatic connection.............................................................................................................93
10.5 Electrical connection to field bus module................................................................................94
10.6 Fuses ......................................................................................................................................95
10.7 Jumpers ..................................................................................................................................96
10.8 Dimension drawing of KS1-DK combination probe ................................................................97
10.9 Dimension drawing of LT 2/KS1-DK in wall-mounted housing ...............................................98
10.10 Dimension drawing of LT 2/KS1-DK on mounting plate .........................................................99
10.11 Dimension drawing of display and operating unit for panel installation................................100
10.12 Wet/dry measurement – deviation, conversion table............................................................101
11 EC Declaration of Conformity ................................................................. 102
11.1 LT 2/KS1-DK lambda transmitter..........................................................................................102
2
1 General Information
1 General Information
1.1 Compliance with the German law on device safety
The German law on device safety stipulates the following:
Note the instructions for use!
Proceed only in compliance with the present technical documentation (Publication No.
DLT3015).
Use the devices only for the purpose described in this documentation.
Use by trained personnel only. The device may only be operated and serviced by
persons whose knowledge and training qualifies them to do so.
Liability for the function of the device shall be transferred to the owner or plant
operator.
Liability for the function of the device shall be borne by the owner or plant operator
insofar as the device has been used by persons without the necessary knowledge,
has been improperly used, serviced or repaired or has been handled in a manner that
does not conform to proper use.
LAMTEC GmbH & Co KG is not liable for damages occurring as a result of noncompliance with the above instructions. Compliance with the above instructions shall
not entail any extension to the warranty and liability provisions of LAMTEC GmbH &
Co KG’s terms of sale and delivery.
Insofar as reference is made to laws, decrees and standards, the basis for these shall
be the law of the Federal Republic of Germany.
3
2 Safety Information
2 Safety Information
The symbols below are used in this Manual as important safety notes for the user.
They are located in the sections of the Manual wherever the information is needed.
The safety information - and warnings, in particular - must be read and observed.
WARNING
This draws attention to possible dangers to persons, particularly from electrical
equipment.
WARNING
This indicates possible danger to persons in the event of improper handling of system
parts.
CAUTION!
This indicates danger to system parts or possible adverse effects on function.
NOTE:
This provides the user with important additional information about the system or
system parts, and supplies more in-depth tips.
This appears in texts containing instructions on how to proceed.
In this connection, the plant operator is requested to comply with legal accident
prevention regulations during all work, and to do everything in his power to prevent
harm to persons or property, as the situation dictates.
4
2 Safety Information
2.1 Proper use, conditions for use
Use
Proper use
The LT 2/KS 1D lambda transmitter is a universal, microprocessor-based
measuring device for the direct measurement of the concentration of O2 and
flammable, oxidising gas constituents (CO/H
COe ), in the superstoichiometric range in combustion systems ( l >1 ), in
connection with the KS1-DK combination probe.
The system is designed for semi-automatic calibration with air and test gas.
If you are contemplating employing the measuring system for other purposes, and
cannot assess with certainty whether the device will function without problem in
this application, please first contact the manufacturer.
Preconditions
The preconditions for use are that system planning, assembly, installation,
commissioning, maintenance and repair work are carried out by adequately
trained personnel, and such work is checked by responsible expert members of
staff.
Expert handling
In particular, please ensure that:
• Use of the device conforms to the technical data and stipulations regarding
permitted use and assembly, connection, ambient and operating conditions
(contained in the order documents, user information, nameplates, etc.) and the
supplied documentation
• Local, system-specific circumstances and risks and regulations pertaining to
technical operation of the device are taken into consideration
• All necessary measures to preserve the value of the device, e.g. for transport
and storage, maintenance and inspection, are carried out.
The product described herein left the factory in perfect condition, conforming to
technical safety regulations and having undergone inspections. In order to
maintain this condition, it may only be employed in the manner described by the
manufacturer. Likewise, suitable transport, storage and erection and careful
operation and maintenance are prerequisites for the perfect, safe operation of the
device.
This product must be installed and operated by appropriately qualified personnel,
who are familiar with this safety information and warnings and are able to act on
them faultlessly. Unqualified tampering with the device or non-compliance with
warnings herein or affixed to the device may result in severe bodily harm and/or
material damages.
Proper use of the device constitutes its use only for the applications referred to in
the technical description. Consequently, additional devices or devices from other
manufacturers must be recommended or approved by Lamtec.
Provided that the technical safety instructions and specifications for operation
contained in this Manual are observed, in normal circumstances this device does
not carry any risk of material damages or harm to health.
), referred to as CO equivalent (
2
5
2 Safety Information
2.2 Permitted users
Qualified personnel
User groups
Staff responsible for safety must ensure that
• Only qualified persons undertake work on system parts. Qualified persons
have been authorised by staff who are responsible for the safety of people and
equipment to perform the above activities on the basis of their training,
experience or instruction pertaining to the device and their knowledge of
relevant standards, provisions, accident prevention regulations and system
behaviour. The deciding factor is that these persons can recognise and avoid
possible dangers in good time when performing the above activities.
Expert staff are persons who conform to DIN VDE 0105 or IEC 364, or directly
comparable standards such as DIN 0832.
• The above persons have the supplied manuals and associated order-related
documentation at their disposal at all times during their work and heed these
documents in respect of the avoidance of risk and damages.
The following three groups of users are permitted to handle the LT 2/KS 1D
lambda transmitter:
• A Service engineers from LAMTEC or their OEM customers, or trained
customer personnel:
• Qualified engineers / technicians
• With very good knowledge of the device.
• “SERVICE” access level - password-protected
• B Operators, the customer’s fitters, engineers for measuring and control
technology, electrical engineers, electronics engineers
• With introductory knowledge of the device.
• “CUSTOMER” access level – password-protected
• C Operating personnel with basic knowledge
• “OPERATION” access level – no password required
6
2 Safety Information
2.3 Safety equipment / protective measures
Danger posed by
electrical equipment
Preventive measures to
improve operational
safety
Avoidance of
consequential damages
Protection against
escaping gas from the
gas-bearing duct
The LT 2/KS1-DK system parts constitute equipment for use in industrial power
installations. Switch off the supply voltage to the mains cables when working on
mains connections or parts that conduct mains voltage. Refit any protection
against electric shock that has been removed before switching on the supply
voltage.
Unskilled use or inexpert handling can result in risks to health or material
damages. Therefore, always observe the relevant safety notes to prevent
damage.
If the LT 2/KS1-DK is employed as a sensor in combination with closed and openloop control systems, the plant operator must ensure that a failure or fault in the
LT 2/KS1-DK cannot result in impermissible damages or dangerous operating
states.
In order to prevent faults that may themselves result in direct or indirect personal
injury or material damages, the plant operator must ensure that:
• The responsible maintenance personnel can be notified at any time and as
quickly as possible
• Maintenance personnel are trained to react appropriately to faults in the
LT 2/KS1-DK and associated system malfunctions
• The faulty equipment is switched off immediately in cases of uncertainty
• Switching off equipment does not result in direct consequential faults
In order to prevent faults that may themselves result in direct or indirect personal
injury or material damages, take care to ensure that qualified personnel evaluate
the faults and initiate the appropriate measures.
The KS1-DK combination probe is mounted directly on the gas-bearing duct by
means of a counter-flange. If the probe is detached, depending on the system and particularly in the case of excess pressure - aggressive and/or hot gas may
flow out of the duct and severely harm the health of unprotected operators, if
suitable protective measures have not previously been introduced.
WARNING
In the event of excess pressure and temperatures higher than 200 °C in the gas
duct, gas escapes when the KS1-DK combination probe is removed.
• Switch off the system before opening; if this is not possible, wear protective
clothing and a protective mask.
• Set up warning signs to this effect in the vicinity of the probe mounting point.
• Seal the opening immediately after the work.
7
2 Safety Information
Shutdown /
bringing back into
service
2.4 Environmentally responsible behaviour, disposal instructions
The LT 2/KS1-DK lambda transmitter and KS1-DK combination probe constitute a
high-quality electronic measuring system. Prudent behaviour is therefore essential
during all measures, on shutdown, transport and storage.
CAUTION!
Do not switch off the LT 2/KS1-DK lambda transmitter while the KS1-DK
combination probe is still mounted, even if the associated system has been shut
down. Residual gases lead to corrosion and may damage system parts.
Do not store devices in the open air without protection! Always store in a dry place
and, if possible, in the original packaging.
Upon deinstallation, protect cable ends and connectors against corrosion and dirt.
Corroded connectors can lead to malfunctions.
Transport in the original packaging when possible
The LT 2/KS1-DK lambda transmitter has also been designed under consideration of
ecological aspects. The assemblies can easily be separated from each other into
different material types, and therefore put aside for recycling in this sorted condition.
8
3 Introduction
3 Introduction
The LT 2/KS1-DK lambda transmitter is a universal, microprocessor-based measuring
device for the simultaneous measurement of the concentration of O
constituents (CO/H
exhaust gases of combustion systems in the superstoichiometric range ( l >1 ), in
connection with the KS1-DK combination probe.
3.1 System overview
and oxidising gas
), referred to as CO equivalent ( COe ), most commonly in the
2
2
LambdaTransmitter LT 2
RS 232
(,
Operation
servicing
)
Option:
CANopen
Modbus
Profibus DP
Ethernet
Analogue inputs
and outputs
CAN
Field bus
Digital inputs
and outputs
to other
LAMTEC
FMS / VMS / ETAMATIC
LT 1 / LT 2
devices
Combination
probe KS1-DK
Recording
LAMTEC SYSTEM BUS
Digital inputs
and outputs
Analogue inputs
and outputs
Opti onal modules
O
2
CO/H
2
9
3 Introduction
3.1.1 KS1-DK combination probe
In the version for exhaust gas temperatures up to 450°C
The KS1-DK and KS1-DK-E combination probes enable in situ (directly in the exhaust
gas), simultaneous measurement of the concentration of O
gas constituents (CO/H
gases in the superstoichiometric range (l>1).
), referred to as CO equivalent (COe), in combustion exhaust
2
and flammable, oxidising
2
KS1-DK
With calibrating gas connection for air / test gas – for semi-automatic calibration:
Length: 500mm Type 656 R 2030
1000mm Type 656 R 2031
1500mm Type 656 R 2032
In version for exhaust gas temperatures up to 450°C incl. Blow-out device as an additional option
KS1-DK-A
with option
„blow-out device“
With calibrating gas connection for air / test gas – for semi-automatic calibration:
Lenght: 500mm Type 656 R 2030A
1000mm Type 656 R 2031A
1500mm Type 656 R 2032A
Solenoid valve device 24VDC Type 650 R 2080
• See separate publication DLT3018
10
3 Introduction
In ejector version for exhaust gas temperatures up to 1400°C (on request)
• With standard GED (stainless steel 1.4571), suitable for exhaust gas temperatures
from 400°C...700°C.
• With ceramic GED, suitable for exhaust gas temperatures up to 1400°C.
• Optional extras: - High dust guard
- Transmitter protective box with housing heater
- Plug & Play
• Can only be connected to LT2/KS1-DK-E via probe connection box
• See separate publication DLT3010
KS1-DK-E with
standard GED
With option
„high dust guard“
11
3 Introduction
3.1.2 LT 2 lambda transmitter
In the version for KS1-DK
LT 2/KS1-DK lambda transmitter in IP65 wallmounted housing
• Sheet steel H400 x W300 x D150 mm
• With display and operating unit
• With two analogue outputs 0/4...20mA
Type 657 R 1028
• Optionally with integrated reference air pump
Type 657 R 1060
This increases the housing size to
500 x 300 x 200 mm (HWD)
• Also see section 4.4.1
Two basic versions are available:
LT 2/KS1-DK lambda transmitter on mounting
plate
• 350 x 258 x 132 mm (HWD)
• Without display and operating unit
• Type 657 R 1032
• With two analogue outputs 0/4...20mA
• Also see section 4.4.2
In the version for KS1-DK_E
LT 2/KS1-DK-E lambda transmitter in IP65 wallmounted housing
• Sheet steel H400 x W300 x D150 mm
• With display and operating unit
• With two analogue outputs 0/4...20mA
Type 657 R 1033
• Can only be connected to KS1-DK-E via PCB
• See separate publication DLT3010
12
3 Introduction
3.2 Theoretical principles of measurement
The KS1-DK combination probe basically consists of an electrochemical cell of
zirconium dioxide ceramic.
It has three electrodes:
• O
-sensitive platinum electrode
2
• CO/H
• Platinum reference electrode
3.3 Probe method of functioning - O2-sensitive electrode
Gas in let
-sensitive electrode of a platinum/precious metal alloy
2
CO/H electrode
2
(Pt / noble metal alloy)
Reference
electro de (Pt)
U
S
U
H
Zi rc o niu m oxi de ce r ami c
Protective coating
O-selective
2
reference electrode (Pt)
Ho usin g
Schematic diagram of the structure of the KS1-DK combination probe
The O
measuring cell functions as an electrochemical concentration cell and
2
generates a direct voltage, which depends upon the absolute temperature T and the
logarithm of the O
electrode and O
If specimen gas is fed to the outer electrode and a reference gas with a known O
concentration ratio or O2 partial pressure ratio on the reference
2
outer electrode.
2
2
concentration, such as air (20.96 %), to the inner electrode, at a constant temperature
the logarithmic relationship illustrated below occurs between the probe voltage U and
the oxygen concentration of the specimen gas.
Sensor characteristic U = f (O2 )
13
3 Introduction
3.4 Probe method of functioning - CO/H2-sensitive electrode
Flammable constituents are, like oxygen molecules, adsorbed on the electrode and
diffuse to the “three-phase limit” formed by measuring gas, the electrode and
zirconium dioxide. In addition to the Nernst voltage U
oxygen content, the flammable constituents in the measuring gas also generate an
additional direct voltage U
of the two voltages U
gases, such as H
= U
S
or CO, the mixed potential is considerably higher than the O2
2
signal. The formation of the mixed potential takes place very rapidly, t
are achieved.
through the sensor. The sensor voltage is the sum total
CO/H2
O2
+ U
(Fig. 1). Even at low concentrations of oxidising
CO/H2
determined on the basis of the
O2
times under 2s
60
Sensitivity to O
A lower sensor temperature results in greater sensitivity to CO/H
to O
(Fig. 2).
2
Likewise, the oxygen concentration has an influence on the sensor voltage U
content increases, the sensor voltage drops off slightly in the high CO range
the O
2
and flammable constituents is influenced by the sensor temperature.
2
and lower sensitivity
2
. As
COe
(Fig. 3).
However, the KS1-DK combination probe must never be operated when too cold, as
otherwise the oxidising constituents will influence the O
measurement (falsification of
2
measurement values produces lower values due to the oxidation of unburned flue gas
constituents on the O
U
s
(mV )
CO
electrode).
2
Sensor characteristic s
(measured)
Nernst characteristic
(calc ulated)
incomplete
combustion
Fig. 1: Characteristic of a gas burner
complete
combustion
Fig. 2: Sensor voltage U
as a function of sensor temperature (heating power)
COe
14
O (%)
2
3 Introduction
If concentrations of O
are higher, more unburned residues (CO/H2 ) oxidise before
2
the 3-phase limit is reached. The graph below shows the influence of the sensor
voltage U
as a function of the O2 content.
COe
1000
800
600
e
400
at starting
point with
0% CO
CO
U [mV]
200
9,5 % O
6
% O
2
2
0
0
2000
4000
6000
CO [ppm]
Fig. 3: Sensor voltage U
as a function of O2 content
COe
8000
10000
We therefore recommend calibrating the characteristic in line with the specific system
by performing a CO reference measurement.
A further indicator for unburned residues (CO/H
) in combustion systems is the
2
dynamics of the sensor signal (Us). As the content of unburned residues increases, so
do the dynamics. Figure 4 below plots the rise of the sensor signal versus the
measured O
value in a reference system (12 MW gas combustion) at low load.
2
700
600
500
400
300
Sensor
Signal dynamic
> 100 mV+
300
U [mV]
200
100
0
0
small load
1
2
3
O ref. [%]
2
4
56
40
2
CO [ppm]
Fig. 4: Sensor voltage U
gas combustion
plotted versus the O2 value of 12MW
COe
15
4 Technical Description
4 Technical Description
4.1 Advantages of the LAMTEC measurement principle
• Direct (in situ) measurement of oxygen (O
constituents (CO/H
O
measuring range: 0 to 21 vol.% in conjunction with
2
measuring range: 0 to 10,000 ppm LT 2/KS1-DK
CO
e
• Uninfluenced by infiltrated air (CO
• No treatment of the gas required,
measurement directly in the damp flue gas
• Setting time to 60 % value (T90 ) <10 seconds with standard sampling
< 2 seconds
CO
e
• Measuring gas temperature up to 450°C
• Up to 1400°C possible with ejector pump
• Low heating power 20...25 watts
depending on the exhaust gas temperature
• Universal
• Easy to use
• Low-maintenance
) in crude gas up to 450°C
2
)
e
) and oxidising exhaust gas
2
}
4.2 Necessary components
• KS1-DK combination probe
• Flange gasket
• Internal/external reference air pump or compressed air connection
• LT 2/KS1-DK lambda transmitter in IP65 wall-mounted housing
incl. display and operating unit, or
• on IP00 mounting plate for installation in control cabinet, without display and
operating unit
(optional display and operating unit for installation in the control cabinet door,
cable length 1m, Type 657R0831T) or
Remote display software for Windows PCs Type 657R1101
16
4 Technical Description
4.3 Basic design of the LT 2/KS1-DK
Semi-automatic calibration system
Pos.
1
1a
1b
1c
1d
1e
1f
3
2
max. 450°C
1
4
Combination probe KS1-DK
with semi-automatic calibration system
Type 656 R 2030 / R2031 / R2032
Probe connection box (PCB)
Hose connector „Test Gas”
Instrument air for offset calibration
or Test gas
- pre pressure 0,3bar
Outlet for reference air
Hose connector „reference air”
- Instrument air (pre pressure 0,3bar)
or
- Reference air pump **
- Air consumption 40...60l/h
Cable glant M16
- Probe heating
Cable glant M20
- Absolut pressure sensor
- Difference pressure sensor
- Probe signals
1a
5
6
1b
1c
1d
1e1f
7
Pos.
2
Pre filter
Type 650 R 2055
3
Counter flange DN65
Type 655 R 0137 / R 0138
4
Flange gasket Klinger Sil C-4400
Type 655 P 4209
5
Lambda Transmitter LT2-K / KS1-DK
with semi-automatic calibration system
Type 657 R 1028 / R 1032
6
Display and operation unit
- built-in in LT2
7
Relay module 660R0017 for output of status of
operation and limits
- 6 relais with 1 change-over contakt
- built-in in LT2
Type 657 R 0857
To use the semi-automatic calibration system, connect the compressed air (instrument
air) for offset calibration and the test gas manually to the probe one after the other and
set the required quantity.
** If no instrument air is available for the reference air, an optional pump unit is
available.
The pressure sensors are integrated in the probe connection box on the head of the
probe. The differential pressure sensor monitors the reference air, the absolute
pressure sensor monitors the rise in pressure in the preliminary filter during
calibration.
Electrical und pneumatic connections see chapter 10.3 and 10.4.
17
4 Technical Description
4.4 LT 2/KS1-DK
4.4.1 In wall-mounted housing
The LT 2/KS1-DK lambda transmitter is the data interpreting device for the KS1-DK
combination probe. It incorporates all the necessary components for the operation of
the KS1-DK combination probe and the evaluation of the measurement signal.
Furthermore, it features additional analogue inputs and outputs, digital inputs and
outputs for process status signals, status signals and limit value signals, as well as
serial interfaces and a universal bus interface (optional extra) for connection with the
customer’s control systems.
Without reference air
pump:
Type 657 R 1028
400 x 300 x 150 (HWD)
With reference air
pump:
Type 657 R 1060
When the optional
reference air pump is
used, the size of the
wall-mounted housing
changes
500 x 300 x 200 (HWD)
18
4 Technical Description
4.4.2 On mounting pate Type 657 R 1032
Transformer
for probe and
electronics
Fuses
Supply voltage
commutation
AC115V/AC230V
NOTE Replace fuse
Slot for relay module
657R0857 (optional
extra)
Buffer amplifier for
converting the
COe signal from
mV into mA
(no longer required
from January
2007)
Connection for
remote display
software (optional
extra)
Probe connection
Protective earth
terminal for cable
screening
4.4.3 Display and operating unit for panel installation
For use with the LT2-KS1D-K on mounting pate.
For installation in the control cabinet door.
Max. cable length 1m.
Type 657R0831T
Internal display and
control elements:
LEDs
Maintenance switch
Multi-function
19
4 Technical Description
4.5 Internal display and control elements of the LT 2/KS1-DK lambda transmitter
The LT 2/KS1-DK is operated and the measurement values, process status and fault
status signals are displayed via the display and operating unit (see section 4.6), or via
PC in conjunction with the remote display software. The LT 2/KS1-DK itself features
only limited operator controls, which nevertheless permit the initiation or display of all
functions necessary for operation, maintenance and service directly on the LT 2/KS1DK as well.
Warning /
Fault
display
Operating
mode
display
Maintenance
switch
Multifunctionkey
Display- and operating elements on processor card
5.1.3 Display and operating elements
LED 12
LED 6
LED 1
1
LED 5
LED 10
LED 4
Operational display (green) LED 6 Operational status display (green) LED 5 Maintenance switch S 1
Oper ation (lights up) Measurement ( lights up)
- -
-
LED 10
LED 1
LED 12
1
LED 4
LED 5
LED 6
Ma in tenan ce ( or a nge ) LED 1 Warni ng/
Maintenance mode active (lights up)
-
Normal operation (off) No warning / fault
- -
LED 10
LED 11
LED 12
LED 9
LED 3
LED 9
LED 3
LED 9
LED 8
LED 2
LED 8
LED 2
LED 8
LED 7
LED 1
LED 7
LED 1
LED 7
S 1
S 1
LED 7
LED 8
LED 9
LED 10
LED 1
LED 12
1
T
2
2
LED 6
LED 5
LED 4
LED 3
LED 2
LED 1
S 1
T
2
2
LED 12
LED 6
LED 5
LED 4
LED 3
LED 2
LED 1
S 1
LED 7
LED 8
LED 9
LED 10
LED 11
Calibra tion (flashe s)
Offset compensation (flashes slowly)
-
With test gas / comparative measurement (flashes rapidly)
-
LED 10
LED 1
LED 12
1
LED 9
LED 8
LED 7
Maintenance mode
-
o ff
T
2
2
LED 5
LED 6
LED 2
LED 3
LED 4
T
S 1
2
2
LED 1
Maintenance mode
o n
fault display (red) LED 12
At least one warning present (lights up)
-
At lea st one fa u lt p re sen t (f l as h es)
-
T 2
2
T 2
S 1
2
LED 1
LED 2
LED 3
LED 4
LED 5
LED 6
20
4 Technical Description
4.5.1 Multifunction push button T1
NOTE:
Function Button assignment
4.5.2 Monitor output
Processor board micro-switches
Change the displayed
warning/fault
Reset the displayed
warning/fault
Quick start measuring gas pump,
abort cold start
Initiate offset calibration or test gas
calibration
Press briefly
Press for more than 3s *
Press for more than 3s **
Press button for more than 3s ** in
measurement mode
* Some warnings and faults cannot be reset as long as the fault is still
present or the routine is still in progress.
** If at least one warning or fault is present, the button must be pressed
for more than 6 seconds.
The monitor output [terminal 31 (-), 32 (+)] allows a multimeter to be connected, for
example. Via the monitor output, the following measurement values can be obtained in
situ on the LT 2/KS1-DK:
measurement value
• O
2
• Probe voltage [U-O2] of O
• AC internal resistance [R
sensor
2
probe] of O2 sensor
i
SW 1 SW 2 Function of monitor output
off off
on off
off on
O
measurement value 0...2.5 V ≡ 0…25 vol.% O2
2
Probe voltage (U-O2) of O
Cell internal resistance (Ri probe) of O
Input resistance of connected measuring device > 10 kΩ
sensor 0...2.5 V ≡ 0…250 mV
2
sensor 0...2.5 V ≡ 0…250 Ω
2
21
4 Technical Description
4.6 Display and operating unit
The display and operating unit of the LT 2/KS1-DK consists of an LCD, the cursor
keys, the Enter key and the menu keys.
• The cursor keys enable you to select measurement values, parameters or
functions in the viewing window of the display. These keys also allow you to
position the cursor to input and edit (Change) data.
• The Enter key activates, confirms and exits Edit mode
The menu keys are assigned to the menu items shown above them in the display.
The screen is divided into three sections:
1. The status bar at the upper edge of
the screen. This shows:
Whether Maintenance mode is active
(left).
The current operating state (centre).
Whether any warnings or faults are
present (right).
The status bar also flashes to indicate
faults.
2. The measurement value is shown in
the middle of the screen.
3. The menu bar, in which entries are
made using the menu key below.
The menu keys feature functions for the LT 2/KS1-DK in abbreviated English:
measurement, calibration
Parameter setup, diagnosis
NOTE:
The limit values are only displayed if they have been activated via the
parameters 930/940/950/960 ( “Service” access level ) (see section
4.12.8)
22
4 Technical Description
4.6.1 Menu function
When the [meas] key is pressed, the screen switches to a large display of the
measurement value, which is selected using the cursor keys (up, down). By pressing
the [meas] key several times, you can return to the display of all measurement values.
4.6.2 Menu function
When the [cal] menu key is pressed, “Start calibration” appears in the display. When
calibration has been activated, a choice of four calibration functions is available:
• Offset calibration on ambient air
• Offset calibration with compressed air, open before
Calibration with reference measuring
•
• O2 calibration with test gas, open gas
• CO calibration with test gas, open gas
You can select the required calibration function using the cursor keys (up, down).
Pressing the ENTER key confirms the selected calibration function and initiates this
calibration process.
You can interrupt the calibration modes using the menu function:
“Abort calibration, return to measurement mode”.
An O
default value is displayed during the calibration process. It only makes sense to
2
measure or display the O
value in the measuring operating state, that is, when
2
calibration is over.
See also chapter 6.5.
23
4 Technical Description
4.6.3 Menu function
Opening the [ par ] menu opens the menu for the parameters.
The Parameter menu is available to the following access levels:
• Operation level
• Customer level
• Service level
(only accessible via password)
• Factory level
NOTE:
The password for Customer level can be assigned individually by the customer.
The screen displays the current access level. The menu bar contains a choice of
menu functions:
• [ exit ] returns to Start menu
• [ psw ] changes the access level to enable password entry
• [ view ] shows the parameter settings. All parameters are displayed,
irrespective of the access level.
• [ change ] allows you to change parameters, but here only the parameters
available to this access level are displayed.
NOTE:
Over 3000 parameters can be changed in the various access levels. To avoid
confusion, we therefore recommend that you use the [ change ] function.
4.6.4 Menu function
[ psw ] opens the sub-menu for password entry, and the Operation* access level is
displayed. The functions shown in the menu bar are as follows:
• [ exit ] returns to the [ par ] menu
• [ clear ] resets the access level to Operation level*
• [ ---- ] moves to the previous password input letter of the alphabet.
• [ ++++ ] moves to the next password input letter of the alphabet.
The cursor keys (up, down) have the same function as [ ++++ ] and [ ---- ]. Use right
and left to move the input sign along the password. If the correct password is entered,
the appropriate access level is displayed and is maintained when the menu is exited
with [ exit ]. If no keys are pressed for a longer period, the access level resets itself to
Operation level.*
* If the password for Customer level is still at the factory setting, the systems goes to
Customer level instead.
24
4 Technical Description
4.6.5 Menu function
[ view ] opens the Parameter menu. The functions of the menu bar are as follows:
[ exit ] returns to the [ par ] menu function.
[ s/l ] changes the display format:
Short: Only the number of the parameter and the current value are displayed.
Medium: A brief description is displayed in addition to the parameter number and the
current value.
Long: In addition to the Medium display, a status bar for the parameters is shown.
[ group - ] pages back by one parameter group.
[ group+ ] pages forwards by one parameter group.
All the available parameter groups are set out in the appendix.
The cursor keys (left, right) correspond to the key function: [ group- ] or [ group+ ]
If not all parameters of a group are displayed in the viewing window, this situation is
indicated by flashing arrows in the right-hand margin. You can move and view the
parameters using the cursor keys (up, down).
Here is an example of the status bar shown with the Long display:
• *kw*_30_[12 ,42 ]_____
The asterisks ‘ * ‘ or ‘__’ are fill characters.
• “k” indicates Customer access level (o = Operation, c = Customer, s = Service, f
= Factory)
• “w” shows the type of parameter (write = can be edited, read = read only)
• “30” is the ‘default’ value (basic value in EPROM)
• “[ 12 ; 42 ]” is the possible range within which the parameters can be changed
With some parameters, no ‘default’ value or interval is shown!
25
4 Technical Description
4.6.6 Menu function
[ change ] allows you to change parameter values. The sub-menu in the menu bar is
the same as the [ view ] menu.
But unlike this, the parameter to be changed is shown inverted (pale font on dark
background). Select the parameter using the cursor keys (up, down). Then press
[ENTER] to activate Edit (Change) mode. The parameter value flashes while it is
being edited.
A selected parameter is displayed in three ways:
Inverse display
→ Parameter can be changed
Bordered display
→ Parameter cannot be changed
Blinking display
→ Edit (Change) mode is active
You can now change the parameter value using the cursor keys (up, down, and left
and right for values with several characters). The functions in the menu bar are as
follows:
• [ esc ] returns to the [ change ] menu without confirming the
changed parameter.
• [ dflt ] resets the ‘default’ (factory-set) value.
• [ OK ] confirms the changed value and returns to the [ change ]
or [ENTER] menu.
This takes you back to the [ change ] menu. You can then open and change other
parameters.
26
4 Technical Description
4.6.7 Menu function
The [diag] key switches the screen to the display of warnings and faults. You can
select individual warnings, faults or limit values using the cursor keys (up, down).
NOTE:
Limit values are only displayed if they have been activated via the parameters
930/940/950/960 (Service level).
The selected warning or fault, which is displayed inverted, can now be acknowledged
or reset with ENTER.
When you select a limit
value with the cursor and
then press Enter, the
display switches to the
Limit Value menu.
If you select “maint.”, the
LT 2/KS1-DK can be
switched to Maintenance
mode, as an alternative to
using the maintenance
switch on the processor
board.
If you select “remote”,
remote display is possible
via LSB with a 2nd LT. To
achieve this, the master LT
must have the LSB address
10, the slave LT the LSB
address 9 (param. 3801).
If you select “hist”, a fault
and warning history is
displayed. Setting, date and
time param. 70...72.
NOTE:
Not all warnings and faults can be reset by acknowledging them - the cause of the
warning or fault may have to be corrected first.
27
4 Technical Description
4.6.8 Display parameters 970 / 971 / 972
The ***Display*** parameter group is responsible for the display and operating unit for
the LT 2/KS1-DK, with the following parameters:
• P. 970 Contrast
This parameter allows you to adjust the contrast of the display.
• P. 971 Brightness
This parameter regulates the brightness of the display’s background illumination.
• P. 972 Language
With this parameter, you can set the language (English, German) of the displayed
texts.
4.6.9 Brightness and contrast
Alternatively, the brightness and contrast can be altered using the Display parameters
(see 3.1) or cursor keys as follows:
Contrast + → Keys 1 & 2
Contrast - → Keys 3 & 4
Brightness + → Keys 1 & 4
Brightness - → Keys 2 & 3
Press the above keys simultaneously.
28
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