DEGA NS III LCD Series User manual

INSTUCTION
MANUAL
Gas Detection Transmitter
DEGA NS III LCD
Reproduction of this manual, or any part thereof, in any form, without the prior permission of
DEGA.CZ s.r.o. is prohibited.
DEGA CZ s.r.o. reserves the right to alter the specifications of the hardware and software
described in this manual at any time and without prior notice.
DEGA CZ s.r.o. bears no liable for any damage resulting from use of this device.

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Content
For your safety ..................................................................................................................................................................................3
Technical data and information........................................................................................................................................................3
Operational conditions .....................................................................................................................................................................4
Terminology ......................................................................................................................................................................................4
Product description...........................................................................................................................................................................5
Instalation, assembly and disassembly of the transmitter...............................................................................................................6
1. Assembly of the transmitter .................................................................................................................................................6
2. Replacement of the sensor module......................................................................................................................................6
3. Replacement of the battery..................................................................................................................................................6
4. Connecting the transmitter via current loop to the controler DEGA UPA II DEGA UPA III a DEGA UDA III..........................6
5. Connecting the sensor via RS485 to the controller DEGA UPA III/UDA III............................................................................7
6. Installation of wiring for RS485.............................................................................................................................................7
Selecting the appropriate type of cable depends on the fire report and the protocol for determining external influences. ....7
7. Setting the RS485 adress of the transmitter.........................................................................................................................7
8. Terminating resistor..............................................................................................................................................................7
9. Communication protocol switch DEGA/MODBUS................................................................................................................8
Transmitter functions .......................................................................................................................................................................8
1. Turning on the transmitter ...................................................................................................................................................8
2. Gas detection ........................................................................................................................................................................8
3. Malfunction...........................................................................................................................................................................8
4. Monitoring the calibration periods.......................................................................................................................................8
5. Reading the record of measured concentrations and alarms ..............................................................................................8
Transmitter controls .........................................................................................................................................................................9
1. History menu „HIST“ ...........................................................................................................................................................10
2. Information menu „INF“ .....................................................................................................................................................10
3. Settings menu „SET“ ...........................................................................................................................................................11
4. Test menu „TEST“ ...............................................................................................................................................................13
Operation, maintenance, inspection and service of the transmitter .............................................................................................14
1. Usage limits.........................................................................................................................................................................14
2. Operation............................................................................................................................................................................14
3. Operation/Maintenance .....................................................................................................................................................14
Accessories and basic types of transmitters...................................................................................................................................15
1. Calibration adapter/connection to the gas pump DEGA GAS INLET ..................................................................................15
2. Cover against splashing water DEGA WATER CAP..............................................................................................................15
3. Funnel for gas collection DEGA COLLECT CAP ....................................................................................................................15
4. Additional Ex „d“ bushing DEGA BUSHING pro NSxII..........................................................................................................15
Basic type of transmitters...............................................................................................................................................................15
1. Transmitters with a catalytic sensor NSx-CL III LCD............................................................................................................15
2. Transmitters with an electrochemical sensor NSx-EL III LCD..............................................................................................15
3. Transmitters with an infrared sensor NSx-IL III LCD ...........................................................................................................17
4. Transmitters with a semiconductor sensor NSx-SL III LCD .................................................................................................18
Attachments....................................................................................................................................................................................19
1. Chart for setting the transmitter adress.............................................................................................................................19
2. Table of error codes............................................................................................................................................................19
3. Signalization transmitted by the current loop 4-20mA ......................................................................................................20
4. Package content..................................................................................................................................................................20
General warranty terms and conditions.........................................................................................................................................21

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For your safety
Beware of static electricity
Electronic components are sensitive to static electricity. Do not touch them directly - they may get damanged.
The device is intended to be installed by a trained person
The product is designed for installation only by a certified technician. The manufacturer is not liable for damages resulting
from incorrect or improper handling.
In case of malfunction, immediately unplug from the power supply
If you notice an unusual smell or smoke emitting from the product, unplug it from the power supply, battery backup and all
other attachments. Continued operation could result in injury or property damage. After disconnecting, have the device
inspected at an authorized dealer or manufacturer.
Do not open the transmitter and do not replace the sensors in the transmitter in a potentially explosive atmosphere
Opening the cover and replacing the sensor in the transmitter in a potentially explosive atmoshpere can cause an explosion. If
service is necessary, first unplug the device from the power supply. After that the device may be disassembled and the
sensors may be replaced.
Do not disassemble the product and ensure against it's contact with water
Contact with internal components of the product may cause an electric shock. In case of any malfuction entrust the servicing
of the product exclusively to a certified service centre. Contact with water can create a short circuit in the product and
consequent damange to property or personal injury.
Use appropriate cable types
To ensure compliance with the parameters of the product, only use cable types recommended in this guide.
Dispose of used products and trasmitter sensors with respect to the environment
Transmitter sensors contain hazardous substances. Dispose of them in accordance with the current legislation on
environmental protection.
Use the transmitter only with the appropriate certified DEGA products
The device is certified as functionally and technically qualified only with original "DEGA" accessories. In case of using the
device with any other products the manufacturer is not liable for any damages that may occur.
Undertake regular functional checks and calibrations of the transmitter
Perform regular "CALIBRATION" (setting the detection limits, checking the responsivness of the sensor, checking the
functionality of the transmitter) and "OPERATIONAL AND FUNCTIONAL CHECKS" of the entire detenction system (sensor
excitation with subsequent control of optical and audible alarms, triggering fans, shutdown technology, etc.). Perform
calibration and operational and functional checks only at certified service centers with a valid certificate of competence or the
manufacturer.
Warning: The transmitter automatically checks it's calibration period - the period of validity of it's calibration. After 12 months since the
last calibration (Max. calibration period) the transmitter will transmit this fact to the host system. The transmitter must be calibrated
immediately at a certified service center with a valid certificate of competance or the manufacturer. See section "Monitoring the
calibration peridos".
Technical data and information
Supply voltage: 24 V nominal, operational range 8-30 V
Cable connections via 4-20 mA: shielded cable 3 x 1 mm (max. 1200 m)
shielded cable 3 x 1,5 mm (max. 2400 m)
Cable connections via RS485: shielded cable 4 x 0,8 mm (max. 1200 m) - see section “ instalation of cabeling for
RS485“
Output: 4 - 20 mA
RS485 - protocol DEGA, or MODBUS
Communication speed of RS485: 9,6 kB
Marking according to ATEX: II 2 G Ex d IIB+H2 T6 Gb Tamb:-40°C-+60°C
II - class environment - non-mining environment
2 G - explosive atmospheres - zone 1
Ex d - type of protection - flameproof enclosure „d“
IIB+H2 - gas group
T6 - temperature gas group

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Gb - type of protection according to EPL
Tamb - operating temperature range
Dimensions without bushings: 150x170x65 mm (WxHxD)
Weight: 2,1 kg
Capacity of the internal memory of history: 44 days at 60s recording interval
Interval record storage memory: 60 s (adjustable range 1-255 s)
Dead band: max 5% of range
Consumption/input at 24V (output RS485)
Warm-Up time
DEGA NSx-EL III LCD
90 mA/2,2 W
DEGA NSx-EL III LCD
max. 180 s
DEGA NSx-CL III LCD
135 mA/3,3 W
DEGA NSx-CL III LCD
max. 30 s
DEGA NSx-IL III LCD
115 mA/2,8 W
DEGA NSx-IL III LCD
max. 15 s
DEGA NSx-SL III LCD
135 mA/3,3 W
DEGA NSx-SL III LCD
max. 180 s
DEGA NSx-PL III LCD
154 mA/3,4 W
DEGA NSx-PL III LCD
max. 30 s
Consumption/input at 24V (output 4-20mA)
Time to stabilize (>5day without power)
DEGA NSx-EL III LCD
110 mA/2,7 W
DEGA NSx-EL III LCD
Up to several hours - based on sensor type
DEGA NSx-CL III LCD
155 mA/3,7 W
DEGA NSx-CL III LCD
max. 1 h
DEGA NSx-IL III LCD
135 mA/3,3 W
DEGA NSx-IL III LCD
max. 30 min
DEGA NSx-SL III LCD
155 mA/3,7 W
DEGA NSx-SL III LCD
max. 5 h
DEGA NSx-PL III LCD
154 mA/3,4 W
DEGA NSx-PL III LCD
max. 30 min
Response time (T90)
Sensor lifetime in a clean environment
DEGA NSx-EL III LCD
max. 180 s - based on sensor type
DEGA NSx-EL III LCD
2 years
DEGA NSx-CL III LCD
max. 15 s
DEGA NSx-CL III LCD
2 years
DEGA NSx-IL III LCD
max. 15 s
DEGA NSx-IL III LCD
5 years
DEGA NSx-SL III LCD
max. 30 s
DEGA NSx-SL III LCD
2 years
DEGA NSx-PL III LCD
max. 15 s
DEGA NSx-PL III LCD
1 year
Operational conditions
Ambient temperature: -40°C to +85 °C
Relative humidity: 0-95 % RH
Air pressure: 86 - 108 kPa
Flow of ambient air: max. 2 m/s - flow directly to the sensor in not allowed
Protection level with a cover: IP 64, with a DEGA WATER CAP IP66 cover
Location: BE3N2 - explosive atmoshpheres - zone 1 (2 G)
Terminology
The marking system for sensors DEGA NSx-yL III LCD:
Gas sensor DEGA NSx-yL III LCD
Series of detectors in potentially explosive atmospheres
Type of detected gas
Sensor type with linear output
Third generation product with new DEGA design
Versions with an LCD display
DEGA NSx-EL III LCD with an electrochemical sensor
They operate on the principle of change of electrical parameters on the electrodes stored in electrolyte, due to oxidation/reduction
reactions of the detected gas on it's surface. These sensors have good selectivity and the ability to detect very low concentrations of toxic
gases.
DEGA NSx-CL III LCD with a catalytic sensor (Pelistor)
They operate on the principle of catalytic combustion - gas concentration is measured based on the amount of heat released in a
controlled combustion reaction. The reaction is supported by a suitable temperature and the pressence of a catalyst. These sensors can be

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used to detect a broad range of flammable gases. The sensors are characterized by fast response,a long lifetime and high stability. A
minimum of 10% of Oxygen in the air is required for it's proper function.
DEGA NSx-IL III LCD with an infrared sensor (NDIR)
Top quality scanning method. They operate on the principle of infrared spectroscopy. The sensors have excellent selecivity in organic
matter, do not require any oxygen in the atmoshpere and are resistant to catalyst poisons (sulfur and silicon compounds) which cause a
change of sensitivity of catalytic sensors. The sensors are characterized by high stability and a long lifetime.
DEGA NSx-SL III LCD with a semiconductor sensor
Cheapest method of scanning. They operate on the principle of changes in electrical conductivity of semiconductors by changing the
concentration of the detected gas. Their advatage is a long lifetime in a clean environment and a wide range of different types of gases and
vapors. Their disadvatage is their low selectivity - the sensor largly responds to other gases for which it is not calibrated.
Other types:
DEGA NSx-yL III basic version
DEGA NSx-yL III LCD - with an LCD display
DegaConfig - sensor adjusting software enabling it's full configuration and calibration.
Product description
Magnetic control
„BACK“
Magnetic control
„FRONT“
Ex „d“ bushing
Magnetic control
„ENTER/EXIT“
IrDa interface
OptionalEx „d“
bushing
Body of the
removable sensor
Cover against splashing
water (optional
accessories)
Body of the
removable sensor
Ex „e“ bushing
Cover against
splashing water
(optional
accessories)
Mounting holes PCB electronics Ex „e“ bushing
Optional Ex „e“ bushing
4
3
2
1
11
10
9
6
5
8
7
4
3
2
1

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Body of the
removable
sensor
Power supply terminal
block+24V DC
Power supply
terminal block GND
Signal terminal block 4-20mA
Terminal resstor
RS485 A
Terminal resistor
RS485 B
NA NA
NA NA
Jumper connector of
the terminal resistor
RS485
Jumper connector of the
communication protocol
(DEGA/MODBUS)
Battery CR2032
DIP switch for the
RS485 adress
Programming
connector
LCD display connector
Status LED Calibration jumpers
Instalation, assembly and disassembly of the transmitter
Before assembling, read the valid instalation standarts EN 60079-29-2 (Selection, instalation, use and maintenance of
detectors for combustible gases and oxygen) and EN 45544-4 (Guildelines for the selection, installation, use and maintenance
of detectors of toxic substances).
In explosive environments the electrical installation must be performed according to DIN EN 60079.14 (Electrical instalation in
hazardours areas)
Secure that the sensor is reachable by air. The transmitter must be in a free area with no obstacles in its way (furniture etc.)
Ensure that the input of the sensor cannot be polluted by layers of dust or other contamination.
1. Assembly of the transmitter
The transmitter consists of four parts - the body of the transmitter, the removable sensor and Ex „d“ bushings.
Transmitter assembly procedure is as follows:
a) Disassemble the transmitter with the four hexagon socket screws 4mm
b) Disconnect the LCD motherboards
c) Mount the transmitter on a flat surface with four 6mm fasteners in height above the floor with the gas entrance
facing downwards, as specified by the detected substance
d) Direct the cable trough the bushing
e) Connect the cabeling to the terminal block. When using the second Ex „d“ bushing, dismout the Ex „d“ blind plug.
It is allowed to use only Ex „d“ bushings with M20x1,5 threads
f) Connect the LCD
g) Assemble the transmitter with the four hexagon sockets scews 4mm
2. Replacement of the sensor module
This activity must not be performed when the sensor is energized.
In case of need to replace the sensor module with a new piece, unscrew and remove the
cover. Disconnect the sensor module cable from the PCB (1), loosen the sink screw (2) and
unscrew the steel cylinder with the sensor (3). Screw the new sensor module, retain it
with the sink screw and connect the cable to the PCB. Finally, mount the cover and
connect to the power supply.
3. Replacement of the battery
The battery lifetime in the sensor is approximately 5 years. After this time some functions of the
detector may not work properly. Remove the battery from the holder and replace it with one of the
recommended types. Replacing the battery in the transmitter, which is not connected to the power,
will erase the internal clock.
Panasonic BR2032.
4. Connecting the transmitter via current loop to the controler DEGA UPA II DEGA UPA III a DEGA UDA III
Connect one transmitter to each channel of the controler as shown in the picture below
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16
15
12
11
10
9
22
21
20
19
18
17
6
5
8
7

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5. Connecting the sensor via RS485 to the controller DEGA UPA III/UDA III
6. Installation of wiring for RS485
Wiring must be done using bus topology and according to the RS485 principles.
Maximum number of connected transmitters per controler channel is 16 (may be less depending on the configuration of the
controller), while the total length of the connecting cable (electrical distance between the controller and the last transmitter)
should not exceed 1200 meters. Due to voltage disposals caused by each transmitter, the maximum addition of distances must
be L1+L2+L3+…+L16:
Cable type
NSx-CL III LCD
NSx-IL III LCD
NSx-SL III LCD
NSx-EL III LCD
Shielded 4x0,8mm
1,7 km
2,3 km
2,3 km
3,4 km
Shielded 4x1mm
2,7 km
3,5 km
3,5 km
5,2 km
Shielded 4x1,5mm
4,9 km
5,9 km
5,9 km
9,2 km
Shielded 4x2,5mm
8,1 km
10,9 km
10,9 km
16,2 km
Selecting the appropriate type of cable depends on the fire report and the protocol for determining external influences.
7. Setting the RS485 adress of the transmitter
Each transmitter must have a unique adress within the entire bus, otherwise there will be
communication collisions and malfunctions.
The transmitter adress can either be set internally using the DegaConfig program or using the DIP
switch on the PCB.
If the position 6 (labeled ADD) is in the ON position, then the adress according to the setting of pins 1-5
is considered. Otherwise the adress set in DegaConfig is considered.
The adress can be set from range 1-31 using binary values. A table with DIP settings for individual
adresses is listed in the attachment "Chart for setting the transmitter adress"
8. Terminating resistor
According to the RS485 specifications, the last device on the bus must be ending with a terminating
resistor 120R. Plug a jumper on the JP2 connector of the last device on the bus to include the 120R
terminating resistor. In the default configuaration the jumper connector is not plugged.

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9. Communication protocol switch DEGA/MODBUS
Plugging a jumper in the JP1 connector will swtich from the DEGA communication protocol to the
MODBUS communication protocol.
Transmitter functions
The detector's motherboard is equipped by status LEDs, which help in detecting problems during the installation.
LED „POW“ shines at correct power
LED „TxD“ flashes when transmitting a packet via RS485
LED „RxD“ flashes when a packet is correctly recieved via RS485
LED „ERR“ shines/flashes in case of malfunction or substandart situations
1. Turning on the transmitter
After turning on the power the LED "POW" starts shining and the LED "ERR" starts flashing, indicating a forming sequence of
the sensor and automatic testing procedures, which can take up to 180s depending on the sensor used. The output of the
current loop is 1mA. During this sequence, testing of internal electronics and stabilization of the sensor in order to eliminate
false alarms after turning on, is taking place. At this time, the display only shows the time to the beginning of the
measurement loop.
After completion of the formation, a 4mA current begins to flow on the output of the current loop and the transmitter starts
working according to it's settings.
2. Gas detection
The transmitter continuously measures the detected gas concentration in the atmoshpere and converts it's current value into
a 4-20 mA signal or transmits it's value to the evaluation unit via DEGA/MOBUS protocol.
3. Malfunction
In case of malfunction the LCD displays the measured concentration, an error code and a key symbol . On the PCB this
condition is indicated by the yellow „ERR“ LED. The meaning of each error code is included in the attachment "Table of error
codes"
4. Monitoring the calibration periods
The transmitter continuously checks the calibration validity of the connected sensor.
After 12 months since the last calibration (Max. calibration interval) the LED "ERR" starts flashing and an inscription
starts flashing on the LCD display. The connected sensor must be calibrated immediately. The transmitter will
transmit the information about the ending calibration via current loop. The transmission will be the following: 10s transmitting
a 4-20mA signal informing about the actual gas concentration following a 1 second interval of 2mA current.
5. Reading the record of measured concentrations and alarms
The transmitter periodically after 60s stores the current detected concentration into it's internal memory. The internal
memory retains data from the last 64260 measurements (cca 44 days). In order to read this information, the program
DegaConfig is required. Refer to the DegaConfig program instruction.

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Transmitter controls
Transmitters equipped with an LCD display can be controlled by the magnetic contact located on the sides of the display
Warning: calibration
required
Warning: Service is
required
Data display Time display
Channel number
(adress)
Activated magnetic
control
Calibration icon
Communication with the
control panel in
progress
Measured value
Bar graph of the
measured value
Measured value
units
Alarm PEL (exceeding
long-term exposure
limit)
Alarm STEL
(exceeding short-
term exposure limit)
Reached alarm level
Alarm indication
- „BACK“ move backwards in the menu, reducing the value
- „FRONT“move forwards in the menu, increasing the value
- „ENTER“ confirm/enter the menu
Placing a magnet into the indent „ “ for 2s, activates the magnetic control, which is displayed by the icon „ “ on the LCD.
Reaching level 4 alarm with catalytic and semiconductor sensors causes a ratchet phenomenon, where even after recovery
from gas leak, the sensor is still in level 4 alarm and needs to be manually reset by pressing „ “.
Main menu structure:
Menu entry
|
History->-Information->-Settings->- Test->- Exit
|-----------------------<------------------------------|
Menu
Display
Description
History
Browsing the alarm history
Information
Information about transmitter settings
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12
11
10
9
8
7
6
5
4
3
2
1

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Settings
Transmitter configuration
Test
Testing the transmitter funcions
Exit
Return to normal operation
1. History menu „HIST“
Browsing the history
Menu
Display
Description
History of all
alarms
Use „ “ to go trough individual alarms. Displays the
date and time of the alarm. Return to the history menu
„“
Highest
concentration in
the past hour
Displays the highest measured concentration and alarm
for the past hour. Return to History menu „ “
Highest
concentration in
the past 8 hours
Displays the highest measured concentration and alarm
for the past 8 hours. Return to History menu „ “
Highest
concentration in
the past 12 hours
Displays the highest measured concentration and alarm
for the past 12 hours. Return to History menu „ “
Highest
concentration in
the past 24 hours
Displays the highest measured concentration and alarm
for the past 24 hours. Return to History menu „ “
Highest
concentration
stored in the
memory
Displays the highest measured concentration and alarm,
that is stored in the memory. Return to History menu
„“
Exit
Return to the main menu
2. Information menu „INF“
Information about settings. Sequentially displays the following information. Access previous information by pressing „ “
Menu
Display
Description
Date of next
calibration
Displays the date of the next calibration

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Date of last
calibration
Displays the date of the last calibration
Power voltage
Displays the power voltage
Temperature
Displays the chip temperature (about 15°C higher than
the ambient temperature)
RS485 device
adress
Displays the device adress
Range up to
Measured concentration value corresponding to 20mA
current
Alarm level 1
Displays alarm level 1
Alarm level 2
Displays alarm level 2
Alarm level 3
Displays alarm level 3
Alarm level 4
Displays alarm level 4
3. Settings menu „SET“
Protected by password 0004. By enetering a wrong password, the transmitter returns to measurement mode. The password
can be changed in the menu SET->PSWD.
Menu
Display
Description
Calibration
Sensor calibration
Setting the alarms
Setting the alarms
Setting the range of the 20mA
current loop
Setting the range of the 20mA
current loop

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Changing the password
Changing the password
Setting the year
Setting the year
Setting the date
Setting the date
Setting the time
Setting the time
Exit
Calibration
a) Connect fresh air to the sensor input. The icon „ “ flashes. After the value stabilizes, move onto the next step using
„“
b) Using „ “ select the concentration of the calibration gas, confirm „ “
c) Connect the calibration gas to the sensor input. The icon „“ flashes. Wait until the value stabilizes and confirm
„“
d) Using „ “ swtch between „YES“ - save calibration, or „NO“ - return to the Settings menu. Confirm the selected
option „ “
e) In case of saving a new calibration, the transmitter will restart.
Setting the alarms
a) Using „ “ select the concentration for alarm 1. Confirm „ “
b) Using „ “ select the concentration for alarm 2. Confirm „ “
c) Using „ “ select the concentration for alarm 3. Confirm „ “
d) Using „ “ select the concentration for alarm 4 Confirm „ “
e) Using „ “ switch between „YES“ - save settings, or „NO“ - return to the Settings menu. Confirm the selected
option „ “
Setting the range of the 20mA current loop
a) Using „ “ select the concentration appropriate to 20mA range. Confirm „ “
b) Using „ “ switch between „YES“ - save settings, nebo „NO“ - return to the Settings menu. Confirm the selected
option „ “
Changing the password
a) Using „ “ select a number in thousands. Save the selected number „ “
b) Using „ “ select a number in hundreds. Save the selected number „ “
c) Using „ “ select a number in tens. Save the selected number „ “
d) Using „ “ select a number in units. Save the selected number „ “

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e) Using „ “ switch between „YES“ - save settings, nebo „NO“ - return to the Settings menu. Confirm the selected
option „ “
Setting the year
a) Using „ “ select a number in thousands. Save the selected number „ “
b) Using „ “ select a number in hundreds. Save the selected number „ “
c) Using „ “ select a number in tens. Save the selected number „ “
d) Using „ “ select a number in units. Save the selected number „ “
e) Using „ “ switch between „YES“ - save settings, nebo „NO“ - return to the Settings menu. Confirm the selected
option „ “
Setting the date
a) Using „ “ select a number in thousands. Save the selected number „ “
b) Using „ “ select a number in hundreds. Save the selected number „ “
c) Using „ “ select a number in tens. Save the selected number „ “
d) Using „ “ select a number in units. Save the selected number „ “
e) Using „ “ switch between „YES“ - save settings, nebo „NO“ - return to the Settings menu. Confirm the selected
option „ “
Setting the time
a) Using „ “ select a number in thousands. Save the selected number „ “
b) Using „ “ select a number in hundreds. Save the selected number „ “
c) Using „ “ select a number in tens. Save the selected number „ “
d) Using „ “ select a number in units. Save the selected number „ “
e) Using „ “ switch between „YES“ - save settings, nebo „NO“ - return to the Settings menu. Confirm the selected
option „ “
4. Test menu „TEST“
Protected by password 0004. By enetering a wrong password, the transmitter returns to measurement mode. The password
can be changed in the menu SET->PSWD.
Menu
4.20 mA current loop
test
Using „ “ set the output current in a 4-22 mA range. Return to Test menu
„“
Digital communication
test
Using „ “ set the concentration broadcasted via RS485 in measuring range
of the sensor.. Return to Test menu „ “
Transmitter restart
Using „ “ switch between „YES“ - for restart, or „NO“ for returning to Test
menu. Confirm „ “.
Return to main menu
Return to main menu

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Operation, maintenance, inspection and service of the transmitter
1. Usage limits
To maintain proper operation of the transmitter it is neccesery to respect the fact, that step changes of humidity,
condensation or rapid changes of pressure can cause incorrect indication of the measured value. Each sensing technology is
suited for different methods of application, which is described below. All sensors are characterized by a smaller or larger cross-
sensitivity to other gases than those which are set. Therefore before processing project documentation we recommend to
have the air in the deployment area of the detection system analyzed.
a) catalytic sensors: Trace amount of vapors of silicon compounds and sulfur compounds cause a permanent loss of sensitivity,
which requires recalibration or replacement of the sensor. Longterm crossing of the measuring range causes a decrease in
sensitivity. In case of an atmoshpere having an oxygen content of less than 17%, there will be an underestimaton of the
measured value. In case of an atmoshpere having an oxygen content of more than 25%, there will be an overestimation of the
measured value.
b) electrochemical sensors: Constant exposure to toxic gases or short-term exposure to gases, which greatly exceed the
maximum range of the sensor, can damage the electrochemical sensor, which requires recalibration or replacement. High
temperature along with low relative humidity have a negative effect on the sensor's lifetime. In case of an atmoshpere having
an oxygen content of less than 1% for longer than 1 hour, there will be an underestimation of the measured value.
c) infrared sensors: Vapor acids and alkalis can etch the optical system and distort the measurements. A check or a calibration
may be neccesery.
d) semiconductor sensors: Short-term exposure to gases or vapors of organic solvents, which greatly exceed the maximum
range of the sensor, may damage the sensor and a recalibration or replacement may be required. In case of an atmoshpere
having na oxygen content of less than 18%, there will be an underestimation of the measured value.
2. Operation
To maintain proper operation of the transmitter it is neccesery to respect the fact, that the presence of certain concentrations
of gases or vapors, other than those for which the sensor is set, can cause an alarm, even if the concentration of the gas does
not exceed the set level. Given the range of disturbing gases or vapors (diluents, exhaust gases, vapors of organic substances,
disinfectants, etc.) a generally allowable concentration of interfering gases can not be determined. Data on cross-sensitivity to
certail gases are included at the apporpriate sensors. Therefore before processing project documentation we recommend to
have the air in the deployment area of the detection system analyzed.
3. Operation/Maintenance
In case of contamination the surface can be cleaned with a slightly moistened cloth.
The seonsors have a different lifetime depending on the sensing technology used, and environmental conditions.
Characteristics of the sensors vary over time. Therefore it is required to perform regular checks and calibrations, which can be
done in two ways:
a) 1x every six months carry out a „calibration“ and functional control - adjust the sesitivity of the sensor using calibration
gas and check the functionality of the system. The exact interval depends on the purity of the environment, required
accuracy and the occurrance of disturbing gases in the atmoshpere.
b) 1x every twelve months carry out a „calibration“ - adjust the sesitivity of the sensor using calibration gas and check the
functionality of the system. The exact interval depends on the purity of the environment, required accuracy and the
occurrance of disturbing gases in the atmoshpere. Also carry out a „functional control" 1 x every three months -
checking the function of the entire detection system using a test gas, which does not exceed the range of the sensor.
We recommend using gas intended for laboratory use.
For the „functional control“ do not use means for testing fire alarm detectors!
Perform calibration only at certified service centers with a valid certificate of competence or the manufacturer.
For the Czech Republic only DEGA CZ s.r.o.

15
Accessories and basic types of transmitters
1. Calibration adapter/connection to the gas pump DEGA GAS INLET
2. Cover against splashing water DEGA WATER CAP
3. Funnel for gas collection DEGA COLLECT CAP
4. Additional Ex „d“ bushing DEGA BUSHING pro NSxII
M20x1,5
Basic type of transmitters
1. Transmitters with a catalytic sensor NSx-CL III LCD
Product code Transmitter type Detected gas Measurement
range
Measurement of
current loop
(4-20mA)
Resolution Calibration gas
40100158DEGA NSM-CL 100 III LCD
Methane (CH
4
)
Natural gas
CNG
0–100 % LEL 0-20 % LEL 0,1 % LEL Methane 0,88 %
40100159DEGA NSP-CL 100 III LCD
Butane (C
4
H
10
)
Propan-Butane
LPG
0–100 % LEL 0-20 % LEL 0,1 % LEL Butane 0,32 %
40100160 DEGA NSH-CL 100 III LCD Hydrogen (H2) 0–100 % LEL 0-20 % LEL 0,1 % LEL Hydrogen 0,8 %
40100157 DEGA NSHC-CL 100 III LCD
Other
flammable and
combustible
gases and
vapors
according to the
selectivity of
the sensor
0–100 % LEL 0-20 % LEL 0,1 % LEL According to the selectivity of the
sensor
2. Transmitters with an electrochemical sensor NSx-EL III LCD
Product code Transmitter type Detected gas Measurement
range
Measurement of
current loop
(4-20mA)
Resolution Calibration gas
40100111 DEGA NSCO-EL 1000 III LCD Carbon
Monoxide (CO) 0–1000 ppm 0-130 ppm 1 ppm Carbon Monoxide 130 ppm
40100108 DEGA NSCO-EL 200 III LCD Carbon
Monoxide (CO) 0–200 ppm 0-200 ppm 0,1 ppm Carbon Monoxide 130 ppm
40100109DEGA NSCO-EL 500 III LCD Carbon
Monoxide (CO) 0–500 ppm 0-500 ppm 0,1 ppm Carbon Monoxide 130 ppm

16
40100110 DEGA NSCO-EL A500 III LCD Carbon
Monoxide (CO) 0- A500 ppm 0-500 ppm 1 ppm Carbon Monoxide 130 ppm
40100112 DEGA NSCO-EL 2000 III LCD Carbon
Monoxide (CO) 0–2000 ppm 0-2000 ppm 1 ppm Carbon Monoxide 130 ppm
40100128 DEGA NSA-EL 100 III LCD Ammonia
(NH3) 0-100 ppm 0-50 ppm 0,1 ppm Ammonia 100 ppm
40100130
DEGA NSA-EL 1000 III LCD Ammonia
(NH3)
0-1000 ppm 0-300 ppm 1 ppm Ammonia
100 ppm
40100133 DEGA NSA-EL 10000 III LCD Ammonia
(NH3)
0-10000 ppm 0-10000 ppm 1 ppm Ammonia
100 ppm
40100129 DEGA NSA-EL 500 III LCD Ammonia
(NH3)
0-500 ppm
0-500 ppm
1 ppm Ammonia
100 ppm
40100132 DEGA NSA-EL 5000 III LCD Ammonia
(NH3)
0-5000 ppm
0-5000 ppm
1 ppm Ammonia
100 ppm
40100131 DEGA NSA-EL 2000 III LCD Ammonia
(NH3)
0-2000 ppm
0-2000 ppm
1 ppm Ammonia
100 ppm
40100105DEGA NSCL2-EL 20 III LCD Chlorine
(Cl2) 0-20 ppm 0-5 ppm 0,01 ppm Chlorine 5 ppm
40100106DEGA NSCL-EL 200 III LCD Chlorine
(Cl2)) 0-200 ppm 0-200 ppm 0,1 ppm Chlorine 50 ppm
40100140 DEGA NSO2-EL 1 III LCD Oxygen (O2) 0-1 % 0-1 % 0,01 % Air
40100141 DEGA NSO2-EL 100 III LCD Oxygen (O2) 0-100 % 0-30 % 0,1 % Air
40100142 DEGA NSO2-EL T100 III LCD Oxygen (O2) 0-100 % 0-30 % 0,1 % Air
40100144 DEGA NSO3-EL 5 III LCD Ozone (O3) 0-5 ppm 0-0,2ppm 0,01ppm Chlorine
5 ppm
40100143 DEGA NSO3-EL 100 III LCD Ozone (O3) 0-100 ppm 0-100 ppm 0,1ppm Chlorine
5 ppm
40100124 DEGA NSHCL-EL 20 III LCD Hydrogen
chloride (HCl) 0-20 ppm 0-10 ppm 0,01 ppm Hydrogen chloride 10 ppm
40100125 DEGA NSHCL-EL 200 III LCD Hydrogen
chloride (HCl) 0-200 ppm 0-200 ppm 0,1 ppm Hydrogen chloride 25 ppm
40100119 DEGA NSH2S-EL 50 III LCD Hydrogen sulfide
(H2S) 0-50 ppm 0-15 ppm 0,1 ppm Hydrogen sulfide 25 ppm
40100121 DEGA NSH2S-EL 500 III LCD Hydrogen sulfide
(H2S) 0-500 ppm 0-500 ppm 1 ppm Hydrogen sulfide 500 ppm
040100118 DEGA NSH2S-EL 100 III LCD Hydrogen sulfide
(H2S) 0-100 ppm 0-100 ppm 0,1 ppm Hydrogen sulfide 25 ppm
40100120 DEGA NSH2S-EL 2000 III LCD Hydrogen sulfide
(H2S) 0-2000 ppm 0-2000 ppm 1 ppm Hydrogen sulfide 2000 ppm
40100137 DEGA NSNO2-EL 20 III LCD Nitrogen dioxide
(NO2) 0-20 ppm 0-15 ppm 0,01 ppm Nitrogen dioxide 20 ppm
40100138 DEGA NSNO2-EL 100 III LCD Nitrogen dioxide
(NO2) 0-100 ppm 0-100 ppm 0,1 ppm Nitrogen dioxide 20 ppm
40100139 DEGA NSNO2-EL 500 III LCD Nitrogen dioxide
(NO2) 0-500 ppm 0-500 ppm 1 ppm Nitrogen dioxide 100 ppm
40100135 DEGA NSNO-EL 250 III LCD Nitric oxide
(NO) 0-250 ppm 0-15 ppm 0,1 ppm
Nitric oxide 150 ppm
40100134 DEGA NSNO-EL 25 III LCD Nitric oxide
(NO) 0-25 ppm 0-25 ppm 0,1 ppm
Nitric oxide 15 ppm
40100136 DEGA NSNO-EL 1000 III LCD Nitric oxide
(NO) 0-1000 ppm 0-100 ppm 1 ppm
Nitric oxide 150 ppm
40100153DEGA NSSO2-EL 20 III LCD Sulfur dioxide
(SO2) 0-20 ppm 0-3,5 ppm 0,01 ppm Sulfur dioxide 4 ppm
40100154DEGA NSSO2-EL 200 III LCD Sulfur dioxide
(SO2) 0-200 ppm 0-200 ppm 0,1 ppm Sulfur dioxide 50 ppm
40100155DEGA NSSO2-EL 2000 III LCD Sulfur dioxide
(SO2) 0-2000 ppm 0-2000 ppm 1 ppm Sulfur dioxide 1000 ppm
40100150 DEGA NSSO2-EL 100 III LCD Sulfur dioxide
(SO2) 0-100 ppm 0-100 ppm 0,1 ppm Sulfur dioxide 50 ppm
40100151DEGA NSSO2-EL 1000 III LCD Sulfur dioxide
(SO2) 0-1000 ppm 0-1000 ppm 1 ppm Sulfur dioxide 1000 ppm
40100152DEGA NSSO2-EL 10000 III LCD Sulfur dioxide
(SO2) 0-10000 ppm 0-10000 ppm 1 ppm Sulfur dioxide 1000 ppm

17
40100094DEGA NSCH2O-EL 10 III LCD Formaldehyde
(CH2O) 0–10 ppm 0-0,7 ppm 0,01 ppm Carbon Monoxide 130 ppm
40100096DEGA NSCH2O-EL 1000 III LCD Formaldehyde
(CH2O) 0–1000 ppm 0-1000 ppm 1 ppm Carbon Monoxide 450 ppm
40100095DEGA NSCH2O-EL 50 III LCD Formaldehyde
(CH2O) 0–50 ppm 0-50 ppm 0,1 ppm Carbon Monoxide 130 ppm
40100097DEGA NSC2H4-EL 10 III LCD Ethylene (C2H4) 0–10 ppm 0-10 ppm 0,01 ppm Ethylene 2 ppm
40100098DEGA NSC2H4-EL 1500 III LCD Ethylene (C2H4) 0–1500 ppm 0-1500 ppm 1 ppm Ethylene 200 ppm
40100099DEGA NSC2H4-EL 200 III LCD Ethylene (C2H4) 0–200 ppm 0-200 ppm 0,1 ppm Ethylene 200 ppm
40100100 DEGA NSC2H4O-EL 10 III LCD Ethylene oxide
(C2H4O) 0–10 ppm 0-1,5 ppm 0,01 ppm Ethylene oxide 2 ppm
40100101DEGA NSC2H4O-EL 100 III LCD Ethylene oxide
(C2H4O) 0–100 ppm 0-100 ppm 0,1 ppm Ethylene oxide 100 ppm
40100102DEGA NSC2H4O-EL 1000 III LCD Ethylene oxide
(C2H4O) 0–1000 ppm 0-1000 ppm 1 ppm Ethylene oxide 100 ppm
40100103DEGA NSC2H4O-EL 500 III LCD Ethylene oxide
(C2H4O) 0–500 ppm 0-500 ppm 1 ppm Ethylene oxide 100 ppm
40100113 DEGA NSH-EL 1000 III LCD Hydrogen
(H2) 0–1000 ppm 0-400 ppm 1ppm Hydrogen
1000 ppm
40100114 DEGA NSH-EL 4000 III LCD Hydrogen
(H2) 0–4000 ppm 0-4000 ppm 1ppm Hydrogen
1000 ppm
40100115 DEGA NSH-EL 400000 III LCD Hydrogen
(H2) 0–400000 ppm 0–100 % LEL 0,1 % 0,8 % obj
40100126 DEGA NSHCN-EL 50 III LCD Hydrogen
cyanide (HCN) 0–50 ppm 0-50 ppm 1 ppm Hydrogen sulfide 1 ppm
40100148 DEGA NSPH3-EL 5 III LCD Phosphine
(PH3) 0–5 ppm 0-0,2 ppm 0,01 ppm Hydrogen sulfide 25 ppm
40100145 DEGA NSPH3-EL 20 III LCD Phosphine
(PH3) 0–20 ppm 0-20 ppm 0,01 ppm Hydrogen sulfide 25 ppm
40100146 DEGA NSPH3-EL 200 III LCD Phosphine
(PH3) 0–200 ppm 0-200 ppm 0,1 ppm Hydrogen sulfide 25 ppm
40100147 DEGA NSPH3-EL 2000 III LCD Phosphine
(
PH3) 0–2000 ppm
0-2000 ppm 1 ppm Hydrogen sulfide 250 ppm
40100149 DEGA NSSIH4-EL 50 III LCD Silane (SiH4) 0–50 ppm 0-5 ppm 0,1 ppm Hydrogen sulfide 25 ppm
40100107DEGA NSCLO2-EL 5 III LCD Chlorine dioxide
(ClO2) 0-1 ppm 0-0,4 ppm 0,01 ppm Chlorine
5 ppm
40100116 DEGA NSH2O2-EL 100 III LCD
Hydrogen
peroxide
(H2O2)
0-100 ppm 0-100 ppm 0,1 ppm Sulfur dioxide 25 ppm
40100117 DEGA NSH2O2-EL 500 III LCD
Hydrogen
peroxide
(H2O2)
0-500 ppm 0-500 ppm 1 ppm Sulfur dioxide 250 ppm
40100122 DEGA NSHBr-EL 20 III LCD
Hydrogen
bromide
(HBr)
0-20 ppm 0-20 ppm 0,01 ppm Hydrogen sulfide 25 ppm
40100123 DEGA NSHBr-EL 200 III LCD
Hydrogen
bromide
(HBr)
0-200 ppm 0-200 ppm 0,1 ppm Hydrogen sulfide 250 ppm
40100127 DEGA NSHF-EL 10 III LCD Hydrogen
fluoride (HF) 0-10 ppm 0-10 ppm 0,01 ppm Nitrogen dioxide 20ppm
40100156 DEGA NSVOC-EL 20 III LCD VOC 0-20 ppm 0-20 ppm 0,01 ppm VOC 20ppm
40100092DEGA NSBR2-EL 20 III LCD Bromine (Br) 0-20 ppm 0-20 ppm 0,01 ppm Chlorine
5 ppm
40100093DEGA NSBR2-EL 200 III LCD Bromine (Br) 0-200 ppm 0-200 ppm 0,1 ppm Chlorine
50 ppm
40100091 DEGA NSALC-EL 200 III LCD Alkohol 0-200 ppm 0-200 ppm 0,1 ppm Ethanol 200 ppm
40100104DEGA NSRCOOH-EL 100 III LCD Organic acids 0-100 ppm 0-100 ppm 0,1 ppm Ammonia
300 ppm
3. Transmitters with an infrared sensor NSx-IL III LCD
Product code Transmitter type Detected gas Measurement
range
Measurement of
current loop
(4-20mA)
Resolution Calibration gas
40100164 DEGA NSCO2-IL 5 III LCD Carbon dioxide
(CO2) 0-5 % vol. 0-2,5 % vol. 0,1 % Carbon dioxide 2,5 % vol.
40100165 DEGA NSCO2-IL HC III LCD Carbon dioxide
(CO2) 0-100 % vol. 0-2,5 % vol. 0,1 % Carbon dioxide 2,5 % vol.
40100166 DEGA NSCO2-IL 500 III LCD Carbon dioxide
(CO2) 0-500 ppm 0-2,5 % vol. 0,1 % Carbon dioxide 2,5 % vol.

18
40100168DEGA NSM-IL 100 III LCD
Methane (CH4)
/ Natural gas
/Coal gas / CNG
0–100 % LEL 0-20 % LEL 0,1 % Methane 0,88 % LEL
40100169DEGA NSP-IL 100 III LCD Butane / LPG
/ Propane-Butane 0–100 % LEL 0-20 % LEL 0,1 % Butane 0,32 % LEL
40100173 DEGA NSC2H6-IL 100 III LCD Ethane
(C2H6) 0–100 % LEL 0-20 % LEL 0,1 % Ethane 20 % LEL
40100171 DEGA NSC2H5OH-IL 100 III LCD Ethanol
(C2H5OH) 0–100 % LEL 0-20 % LEL 0,1 % Ethanol 20 % LEL
40100172 DEGA NSC2H4-IL 100 III LCD Ethylen (C2H4) 0–100 % LEL 0-20 % LEL 0,1 % Ethene 20 % LEL
40100170 DEGA NSC2H4O-IL 100 III LCD Etyhelen oxide
(C2H4O) 0–100 % LEL 0-20 % LEL 0,1 % Etyhelen oxide 20 % LEL
40100176 DEGA NSC6H14-IL 100 III LCD Hexane
(Petrol) 0–100 % LEL 0-20 % LEL 0,1 % Hexane 20 % LEL
40100177 DEGA NSN2O-IL 1 III LCD Nitrous oxide
(N2O) 0-1 % LEL 0-0,5 % LEL 0,01 % Nitrous oxide 0,5 % LEL
40100175 DEGA NSC5H12-IL 100 III LCD Pentane
(C5H12) 0–100 % LEL 0-20 % LEL 0,1 % Pentane 20 % LEL
40100174 DEGA NSC3H6-IL 100 III LCD Propylene
(C3H6) 0–100 % LEL 0-20 % LEL 0,1 % Propylene 20 % LEL
40100167DEGA NSHC-IL 100 III LCD
Other flammable
and combustible
gases and vapors
according to the
selectivity of the
sensor
0–100 % LEL 0-20 % LEL 0,1 % Hexane 0,18 % LEL
4. Transmitters with a semiconductor sensor NSx-SL III LCD
Product code Transmitter type Detected gas Measurement
range
Measurement of
current loop
(4-20mA)
Resolution Calibration gas
40100163DEGA NSY-SL 100 III LCD Acetylene (C2H2) 0–100 % LEL 0-20 % LEL 0,1 % 20 % LEL
40100162DEGA NSR-SL 2000 III LCD
Refrigerant:
R401A, R404A,
R407C, R32,
R410A, R12, R22
0–2000 ppm 0-20 % LEL 1 ppm According to the type of refrigerant
40100161 DEGA NSHFO-SL 2000 III LCD Chladivo
R1234yf 0–2000 ppm 0-2000 ppm 1 ppm
Dle typu chladiva 0 ppme uložení souboru
ve formátu *.csv, který můžeme například
zpracovat pomocí programu
Excelpojených více sn
1. Transmitters with a PID sensor NSx-PID III LCD
Product code Transmitter type Detected gas Measurement
range
Measurement of
current loop
(4-20mA)
Resolution Calibration gas
40100178 DEGA NSVOC-PID III LCD VOC 0–4000 ppm 0-500 ppm 0,1ppm Izobutylene 300ppm
LEL - Lowest explosion level
ALARM "PEL": Permitted exposure limit - maximal permitted value of the avarage concentration over time.
Alarm settings can be chosen freely according to customer requirements in measurement range.

19
Attachments
1. Chart for setting the transmitter adress
adress
1
2
3
4
5
1
ON
OFF
OFF
OFF
OFF
2
OFF
ON
OFF
OFF
OFF
3
ON
ON
OFF
OFF
OFF
4
OFF
OFF
ON
OFF
OFF
5
ON
OFF
ON
OFF
OFF
6
OFF
ON
ON
OFF
OFF
7
ON
ON
ON
OFF
OFF
8
OFF
OFF
OFF
ON
OFF
9
ON
OFF
OFF
ON
OFF
10
OFF
ON
OFF
ON
OFF
11
ON
ON
OFF
ON
OFF
12
OFF
OFF
ON
ON
OFF
13
ON
OFF
ON
ON
OFF
14
OFF
ON
ON
ON
OFF
15
ON
ON
ON
ON
OFF
adress
1
2
3
4
5
16
OFF
OFF
OFF
OFF
ON
17
ON
OFF
OFF
OFF
ON
18
OFF
ON
OFF
OFF
ON
19
ON
ON
OFF
OFF
ON
20
OFF
OFF
ON
OFF
ON
21
ON
OFF
ON
OFF
ON
22
OFF
ON
ON
OFF
ON
23
ON
ON
ON
OFF
ON
24
OFF
OFF
OFF
ON
ON
25
ON
OFF
OFF
ON
ON
26
OFF
ON
OFF
ON
ON
27
ON
ON
OFF
ON
ON
28
OFF
OFF
ON
ON
ON
29
ON
OFF
ON
ON
ON
30
OFF
ON
ON
ON
ON
31
ON
ON
ON
ON
ON
2. Table of error codes
code
cause
solution
1
Sensor is not present
(EEPROM is not
communicating)
Disconnect and
reconnect the sensor,
then restart the sensor
by disconnecting and
reconnecting the power
2
Unknows sensor type
Contact the
manufacturer
3
Type 2 senesor type ID
not found in the table
setting LMP91000
Contact the
manufacturer - FW
update required
4
CRC does not match the
sensor EEPROM
Sensor error - contact
the manufacturer
5
LMP91000 does not
respond
Sensor error - contact
the manufacturer
6
The set sensor ID does
not match with the
connected sensor
Checking the
configuration of the
sensor required
7
Reserved
Reserved
8
EL sensor test error
Sensor error
9
Transmitter is in
preheating mode
Wait a few minutes, the
transmitter will
automatically enter
measurement mode
10
Reserved
11
reserved
12
Error reading the internal
FLASH
Restart the transmitter.
If the error persists,

20
contact the
manufacturer
13
Error reading the internal
FLASH
Restart the transmitter.
If the error persists,
contact the
manufacturer
14
Error reading the internal
FLASH
Restart the transmitter.
If the error persists,
contact the
manufacturer
15
Sensor error
Replace the sensor
16
The device exceeded the
maximum calibration
interval by 50%
Calibration is necceserry
129
The measured value
exceeds the range of -
10%
If the error persists,
contact the
manufacturer
130
The result of the AD
covertion is out of range
Contact the
manufacturer
3. Signalization transmitted by the current loop 4-20mA
Measurement: The measure concentration is directly proportional to 4-20mA current output
Exceeding the range of measured concentrations: Current output ranges from 20-22mA
End of valid calibration: Current output transmits the actual measured concentration for 9s in a 4-20mA range and for 1s 2mA
current
Malfunction: Current output will be set to 0,5mA
Mainternace:Current output will be set to 1mA
4. Package content
1x sensor
1x grommet