DEGA NSx-yL III LCD User manual

INSTRUCTION
MANUAL
Gas Detector
DEGA NSx-yL 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

Content
For your safety .................................................................................................................................................................................. 3
Technical data and information ........................................................................................................................................................ 3
Operational conditions ..................................................................................................................................................................... 4
Terminology ...................................................................................................................................................................................... 4
Product description ........................................................................................................................................................................... 5
Instalation, assembly and disassembly of the detector ................................................................................................................... 6
1. Assembly of the detector ...................................................................................................................................................... 6
. Replacement of the sensor module ...................................................................................................................................... 6
3. Replacement of the battery .................................................................................................................................................. 6
4. Connecting the detector via current loop to the controler DEGA UPA II/DEGA UPA III ....................................................... 7
5. Connecting the sensor via RS485 to the controller DEGA UKAIII/DEGA UPA III/DEGA UDA III ............................................ 7
6. Installation of wiring for RS485 ............................................................................................................................................. 7
7. Setting the RS485 adress of the detector ............................................................................................................................. 7
8. Terminating resistor .............................................................................................................................................................. 7
9. Communication protocol switch DEGA/MODBUS ................................................................................................................ 8
Detector functions ............................................................................................................................................................................ 8
1. Turning on the detector ........................................................................................................................................................ 8
. Gas detection ........................................................................................................................................................................ 8
3. Malfunction ........................................................................................................................................................................... 8
4. Monitoring the calibration periods ....................................................................................................................................... 8
5. Reading the record of measured concentrations and alarms .............................................................................................. 8
Detector controls .............................................................................................................................................................................. 9
1. History menu „HIST“ ........................................................................................................................................................... 10
. Information menu „INF“ ..................................................................................................................................................... 10
3. Settings menu „SET“ ........................................................................................................................................................... 11
4. Test menu „TEST“ ............................................................................................................................................................... 13
Operation, maintenance, inspection and service of the detector .................................................................................................. 14
1. Usage limits ......................................................................................................................................................................... 14
. Operation ............................................................................................................................................................................ 14
3. Operation/Maintenance ..................................................................................................................................................... 14
Accessories and basic types of detectors ....................................................................................................................................... 15
1. Calibration adapter/connection to the gas pump DEGA GAS INLET .................................................................................. 15
. Cover against splashing water DEGA WATER CAP .............................................................................................................. 15
3. Funnel for gas collection DEGA COLLECT CAP .................................................................................................................... 15
4. Additional Ex „d“ cable gland .............................................................................................................................................. 15
Basic type of detectors ................................................................................................................................................................... 15
1. Detectors with a catalytic sensor NSx-CL III LCD ................................................................................................................. 15
. Detectors with an electrochemical sensor NSx-EL III LCD .................................................................................................. 15
3. Detectors with an infrared sensor NSx-IL III LCD ................................................................................................................ 17
4. Detectors with a semiconductor sensor NSx-SL III LCD ...................................................................................................... 18
5. Detectors with a PID sensor NSx-PL III LCDPID ................................................................................................................... 18
Add-on modules .............................................................................................................................................................................. 19
Attachments .................................................................................................................................................................................... 19
1. Chart for setting the detector address ............................................................................................................................... 19
. Conversion between volumetric concentration and lower explosion limit of methane .................................................... 19
3. Table of error codes ............................................................................................................................................................ 19
4. Signalization transmitted by the current loop 4- 0 mA ..................................................................................................... 0
5. Package content .................................................................................................................................................................. 0
General warranty terms and conditions ......................................................................................................................................... 1

3
For your safety
Beware of stati ele tri ity
Electronic components are sensitive to static electricity. Do not touch them directly - they may get damanged.
The devi e 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 ase of malfun tion, 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 dete tor and do not repla e the sensors in the dete tor in a potentially explosive atmosphere
Opening the cover and replacing the sensor in the detector 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 (certified partner or manufacturer).
Do not disassemble the produ t and ensure against it's onta t 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 able types
To ensure compliance with the parameters of the product, only use cable types recommended in this guide.
Dispose of used produ ts and trasmitter sensors with respe t to the environment
Detector sensors contain hazardous substances. Dispose of them in accordance with the current legislation on environmental
protection.
Use the dete tor only with the appropriate ertified DEGA produ ts
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 fun tional he ks and alibrations of the dete tor
Perform regular "CALIBRATION" (setting the detection limits, checking the responsivness of the sensor, checking the
functionality of the detector) 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 detector automatically checks it's calibration period - the period of validity of it's calibration. After 1 months since the last
calibration (Max. calibration period) the detector will transmit this fact to the host system. The detector must be calibrated immediately at
a certified service center with a valid certificate of competance or the manufacturer. See section "Monitoring the calibration peridos".
Te hni al data and information
Supply voltage: 4 V nominal, operational range 8-30 V
Cable connections via 4- 0 mA: shielded cable 3 x 1 mm (max. 1 00 m)
shielded cable 3 x 1,5 mm (max. 400 m)
Cable connections via RS485: shielded cable 4 x 0,8 mm (max. 400 m) - see section “ instalation of cabeling
for RS485“
Output: 4 - 0 mA
RS485 - protocol DEGA, or MODBUS
Piezo buzzer
Standarts: EN60079-0: 01 , IEC60079-0: 011
EN60079-1: 014, IEC60079-1: 014
Marking according to ATEX: II G Ex db IIB+H T6 Gb Tamb:-40°C-+60°C
Marking according to IECEx: Ex db IIB+H T6 Gb Tamb:-40°C-+60°C
II – eqiupment group - non-mining environment 2 G - eqiupment category - explosive atmospheres - zone 1
Ex d - type of protection - flameproof enclosure „d“ IIB+H2 - gas group
T6 – temperature class Gb - eqiupment protection level EPL Tamb – ambient temperature

4
Dimensions without cable glands: 150 x 170 x 65 mm (WxHxD)
Weight: ,1 kg
Capacity of the internal memory of history: 44 days at 60s recording interval
Interval record storage memory: 60 s (adjustable range 1- 55 s)
Dead band: max 5 % of range
Consumption/input at 24V (output RS485)
Warm
-
Up time
DEGA NSx
-
EL III LCD
90 mA/ , 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
11
5
mA/ ,8 W
DEGA NSx
-
IL III LC
D
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 PID LCD
154 mA/3,4 W
DEGA NSx
-
PL III PID LCD
max. 30 s
Consumption/input at 24V (output 4
-
20mA)
Time to stabilize (>5day without pow
e
r)
DEGA
NSx
-
EL III LCD
1
10 mA/ ,7 W
DEGA NSx
-
EL III LCD
1
-
7 h
DEGA NSx
-
CL III LCD
155 mA/3,7 W
DEGA NSx
-
CL III LC
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
15
4 mA/3,4 W
DEGA NSx
-
PL III LCD
max. 30 min
Response time (T90)
Sensor lifetime in a lean environment
DEGA NSx
-
EL III LCD
max. 180 s
-
based on sensor type
DEGA NSx
-
EL III LCD
years
DEGA NSx
-
CL III LC
D
max. 15 s
DEGA NS
x
-
CL III LCD
years
DEGA NS
x
-
IL III LCD
max. 15 s
DEGA NSx
-
IL III LC
D
5 years
DEGA NSx
-
SL III LCD
max. 30 s
DEGA NSx
-
SL III LCD
years
DEGA NSx
-
PL III LCD
max. 15 s
DEGA NSx
-
PL III LCD
5 000 h
Operational onditions
Ambient temperature: -40 °C to +60 °C
Relative humidity: 0-95 % RH
Air pressure: 80-1 0 kPa
Flow of ambient air: max. m/s - flow directly to the sensor in not allowed
Protection level with a cover: IP 54, with a DEGA WATER CAP IP 66 cover
Location: BE3N - explosive atmoshpheres - zone 1 ( G)
Terminology
The marking system for dete tor DEGA NSx-yL III LCD:
Gas detector 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 ele tro hemi al 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 atalyti 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 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

5
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 semi ondu tor sensor
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.
DEGA NSx-PL III LCD PID with a PID – photoionization sensor
Typical photoionization detectors measure volatile organic compounds and other gases in concentrations from sub parts per
billion to 10 000 parts per million (ppm). The photoionization detector is an efficient and inexpensive detector for many gas
and vapor analytes. PIDs produce instantaneous readings, operate continuously, and are commonly used as detectors for gas
chromatography or as hand-held portable instruments. Hand-held, battery-operated versions are widely used in military,
industrial, and confined working facilities for health and safety. Their primary use is for monitoring possible worker exposure
to volatile organic compounds (VOCs) such as solvents, fuels, degreasers, plastics & their precursors, heat transfer fluids,
lubricants, etc. during manufacturing processes and waste handling.
Produ t des ription
Magnetic control
„BACK“
Magnetic control
„FRONT“
Ex „d“ cable gland Magnetic control
„ENTER/EXIT“
IrDa interface OptionalEx „d“ cable
gland
Body of the
removable sensor
Cover against splashing
water (optional accessories)
Body of the removable
sensor
Ex „d“ cable gland Cover against
splashing water
(optional
accessories)
Mounting holes PCB electronics Ex „d“ cable gland Optional Ex „d“ cable gland
Body of the
removable sensor
Power supply terminal
block+ 4V DC
Power supply
terminal block GND Signal terminal block 4- 0 mA
6
5
8
7
4
3
2
1
11
0
10
0
9
6
5
8
7
4
3
2
1

6
Terminal resstor
RS485 A
Terminal resistor
RS485 B
Expanding contact
relay ERROR Expanding contact relay 1
Expanding contact
relay Expanding contact relay 3
Jumper connector of
the terminal resistor
RS485
Jumper connector of the
communication protocol
(DEGA/MODBUS)
Battery CR 03
DIP switch for the RS485
adress
Programming
connector LCD display connector
Status LED Calibration jumpers
Instalation, assembly and disassembly of the dete tor
Before assembling, read the valid instalation standarts EN 60079- 9- (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 detector 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 dete tor
The detector consists of four parts - the body of the detector, the removable sensor and Ex „d“ cable glands.
Detector assembly procedure is as follows:
a) Disassemble the detector using four screws with an internal hexagon of 5 mm.
b) Disconnect the LCD from the motherboard.
c) Mount the detector on a flat surface using four 6 mm dowels to a height above the floor according to the
specification of the detected substance with the gas inlet facing downwards.
d) Pass the cable through the gland.
e) Connect the cabling to the detector terminal board according to the chapters "connection of the detector to
control panels". It is only permitted to use an Ex "d" gland with an M 0x1.5 thread.
f) Interconnect using M4 grounding screws. A CUPAL washer must be used.
g) Connect the LCD.
h) Assemble the detector using four screws with an internal hexagon of 5 mm.
2. Replacement of the sensor module
This activity must not be performed when the detector 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 ( ) 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.
Panasoni BR2032
14
13
16
15
12
11
10
9
22
21
20
19
18
17

7
4. Connecting the detector via current loop to the controler DEG UP II/DEG UP III
Connect one detector to each channel of the controler as shown in the picture below
5. Connecting the sensor via RS485 to the controller DEG UK III/DEG UP III/DEG UD III
6. Installation of wiring for RS485
Wiring must be installed using bus topology and in compliance with the RS485 policy.
The maximum number of connected transmitters per controller channel is 16 (may be less depending on the configuration of
the controller), while the total length of the controller (electrical distance between the controller and the last transmitter)
should not exceed 400 meters.
Sele ting the appropriate type of able depends on the fire report and the proto ol for determining external influen es.
7. Setting the RS485 adress of the detector
Each detector must have a unique adr
ess within the entire bus, otherwise there will be communication
collisions and malfunctions.
The detector 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 detector adress"
8. Terminating resistor
According to the RS48
5 specifications, the last device on the bus must be ending with a terminating
resistor 1 0R. Plug a jumper on the JP connector of the last device on the bus to include the 1 0R
terminating resistor. In the default configuaration, the jumper connector is not plugged.

8
9. Communication protocol switch DEG /MODBUS
Plugging a jumper in the JP1 connector will swtich from the DEGA communication protocol to the
MODBUS communication protocol.
Dete tor fun tions
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 detector
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 180 s depending on the sensor used. The output of the
current loop is 1 mA. 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 4 mA current begins to flow on the output of the current loop and the detector starts
working according to it's settings.
2. Gas detection
The detector continuously measures the detected gas concentration in the atmoshpere and converts it's current value into a
4- 0 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 detector continuously checks the calibration validity of the connected sensor.
After 1 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 detector will
transmit the information about the ending calibration via current loop. The transmission will be the following:
10 s transmitting a 4- 0 mA signal informing about the actual gas concentration following a 1 second interval of mA current.
5. Reading the record of measured concentrations and alarms
The detector periodically after 60 s stores the current detected concentration into it's internal memory. The internal memory
retains data from the last 64 60 measurements (cca 44 days). In order to read this information, the program DegaConfig is
required. Refer to the DegaConfig program instruction.

9
Dete tor ontrols
Detectors 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 levels
Alarm indication
-
„BACK“ move backwards in the menu, reduci
ng the value
-
„FRONT“move forwards in the menu, incr
e
a
sing the value
-
„ENTER“
confirm/enter the menu
Placing a magnet into the indent „ “ for 5 s, activates the magnetic control, which is displayed by the icon „ “ on the
LCD.
Rea hing level 4 alarm with atalyti and semi ondu tor sensors auses a rat het phenomenon, where even after re overy
from gas leak, the sensor is still in level 4 alarm and needs to be manually reset by pressing „ “.
Main menu stru ture:
Enter the menu by holding the magnet for 5 s
|
History->-Information->-Settings->- Test->- Exit
|-----------------------<------------------------------|
Menu
Display
Description
History
Browsing the alarm history
Information
Information about detector settings
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1

10
Se
ttings
Detector configuration
Test
Testing the detec
t
o
r funcions
Exit
Return to
normal operation
1. History menu „HIST“
Browsing the history
Menu
Display
Des ription
History of all
alarms
Use „ “ to go trough individual alarms. Displays the
date and time of the alarm. Return to the history menu
„ “
H
i
ghest
on entration in
the past hour
Displays the highest measured concentration and alarm
for the past hour. Return to History menu „ “
Highest
on entration in
the past 8 hours
Displays the
highest measured concentration and alarm
for the past 8 hours. Return to History menu „ “
Highest
on entration in
the past 12 hours
Displays the highest measured concentration and alarm
for the past 1 hours. Return to History menu „ “
Highest
on entration in
the past 24 hours
Displays the highest measur
e
d
concentration and alarm
for the past 4 hours. Return to History menu „ “
Highest
on entration
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
m
ain menu
2. Information menu „INF“
Information about settings. Sequentially displays the following information. Access previous information by pressing „ “
Menu
Display
Description
Date of next
alibration
Displays the date of the next calibration