Evikon E2630 Series User manual

Nitrogen Dioxide Detector
E2630-NO2
User Manual

E2630-NO2 Rev 23.03.2021
Table of contents
Nitrogen Dioxide 3
Specifications 4
Product description 5
Safety requirements 5
Operating conditions 5
Installation guidelines 6
Mounting dimensions 7
Connections 8
Operation 9
Sensor probe handling 10
The electrochemical gas sensor replacement procedures 10
Maintenance 11
Calibration 11
Delivery set 11
Order code for E2630-NO2 options 11
Warranty 12
Manufacturer contacts 12
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E2630-NO2 Rev 23.03.2021
Nitrogen Dioxide
A Colorless toxic gas, relatively insoluble in water. When exposed to oxygen (including air),
nitric oxide is converted into nitrogen dioxide.
Chemical formula
NO2
Molar weight
46
Relative gas density (to air)
1.59
Conversion
1 ppm = 1.88 mg/m3
Boiling point
21.2 °C
Flammability
Powerful oxidize, can cause many organic substances
(wood, paper, oil, etc) to ignite.
Irritates the skin, eyes, and respiratory tract. Exposure to
levels above 100 ppm can cause death due to
asphyxiation from fluid in the lungs. There are often no
symptoms at the time of exposure other than a
transient cough, fatigue, or nausea, but over hours
inflammation in the lungs causes edema.
Odor
Characteristic pungent odor
Odor threshold
0.1 to 0.4 ppm
Hazards
Irritates respiratory tract and eyes, at high
concentrations may cause lung edema and death.
Exposure limits
(NIOSH)
ST REL
1.88 mg/m3/ 1 ppm
IDLH
37.6 mg/m3/20 ppm
Conversion of ppm to mg/m3is calculated for 25°C and 1 atm.
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E2630-NO2 Rev 23.03.2021
Specifications
Sensor type
Electrochemical cell
Sampling method
Diffusion
Typical detection range
0...10 ppm
Alarm setpoints
(release-LOW-HIGH)
2-3-6 ppm NO2
Response time T90
< 60 seconds
Signal update
Every 1 second
Sensor lifetime
> 2 years
Calibration interval
6 months
Power supply
24 VAC/DC or 90...265 VAC
Power consumption
< 2 VA
Digital interface
UART
Relay outputs
2 × SPDT, max 5 A, 30 VDC / 250 VAC
Alarm signaling
Buzzer 2 Hz, 85 dB; red LED
LEDs
Green/red (operation/fault), red (gas alarm)
Enclosure
Grey ABS, wall mount, protection class IP65
Dimensions
H140 × W145 × D55 mm
CE marking
According to 2014/30/EU and 2014/35/EU, EN 50491-4-1:2012
EN 61000-6-3:2020, EN 61326-1:2013(EMC, emissions)
EN 61000-6-1:2019, EN 61000-6-2:2019(EMC, Immunity)
EN 60079-29-1:2016, EN 60079-29-2:2015 and EN 60079-29-3:2014
Operating conditions
-30...50°C, 15...90% RH non-condensing, 0,9...1,1 atm,
Explosion-safe indoor areas,
Non-aggressive atmosphere
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E2630-NO2 Rev 23.03.2021
Product description
E2630 series gas detectors are compact and easy-to-use instruments. The devices utilize
novel fully calibrated and temperature compensated gas sensors with excellent
repeatability, stability, and long lifetime.
Two relays RE1 and RE2 with switching contacts can be used to control alarm sirens,
ventilation fans, shut-off valves, or other actuators. The devices are equipped with a visual
and acoustic alarm.
The version of your detector is marked on the package.
Safety requirements
Misuse will impair the protection of the product. Always adhere to the safety provisions
applicable in the country of use.
Do not perform any maintenance operation with the power on. Do not let water or foreign
objects inside the device.
Removal of the PCB from the enclosure voids the warranty. Do not touch the electronic
components directly, as they are sensitive to static electricity.
Connection diagrams can be found in the connections section. The device might not
perform correctly or be damaged if the wrong power supply is connected.
External circuits connected to the equipment should have sufficient insulation rating
according to the environmental conditions and equipment power.
A disconnecting device that is marked as such and easily accessible should be included in
the installation of this product.
Operating conditions
The device should be used both in a non-hazardous indoor area and in a basic
electromagnetic environment, where the latter is defined in EN 61326-1. Avoid strong
mechanical shock and vibrations. Avoid corrosive atmosphere and areas highly
contaminated with dust, oil mist, etc. Keep the instrument away from direct sunlight. A
sudden temperature or humidity change might affect the sensitivity of the sensor.
When stored without powering in normal air for a long period, or in an environment
contaminated with organic vapors or volatile oils, the sensor may show a reversible drift in
resistance according to the environment.
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E2630-NO2 Rev 23.03.2021
Installation guidelines
There are no precise rules or standards to follow when installing gas detectors. The
following points must be taken into account:
●Application (air quality control or leakage detection.)
●Properties of the space under investigation (room geometry, direction, and
velocity of airflows, etc.),
●Nitrogen dioxide is ca. 1.6 times heavier than air. The location of the sensor is
determined by operating conditions. Thus, in the underground parking, the NO2
rises to the ceiling with hot exhaustion gases, so the sensor should be located at
1.2...1.5 m from the floor in order to detect potentially dangerous concentration
more quickly.
●The device should be accessible for maintenance and repair.
The aforementioned conditions above will affect the coverage area of the device. however,
the coverage area for a detector is usually between 2.5 to 5 meters radius.
For early leakage detection install the sensor as close as possible to the potential leakage
sources (flanges, valves, pressure reducers, pumps, etc.), taking into consideration other
points listed above.
For general area monitoring without definite leakage sources, the detector should be
distributed evenly in the room.
Do not locate the detector close to ventilation openings and strong air currents. Avoid the
areas without air circulation (corners, niches) as well.
For personal safety control, the detectors are installed in the breathing zone (at the height
of the head of people or animals). The recommended sensor position is vertical, pointing
downwards.
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E2630-NO2 Rev 23.03.2021
Mounting dimensions
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E2630-NO2 Rev 23.03.2021
Connections
1. Unscrew four lid screws and detach the lid from the device;
2. Attach the device to the wall using provided screws through the side mounting holes or
key slots (This step may be done before step 1, consider your convenience).
3. Use two M16 cable glands to let in the cables of the power supply and of the external
devices.
Connect the power terminals N and L to the 24 V power source if you are using detector
version -24 or to 230 V AC mains if you are using detector version -230 (see diagram
below).
The terminals on the E2630 series devices are suitable for a wide range of wires with
cross-section 0,2...1,5 mm2. We recommend to strip the wire end by 5...6 mm and use the
wire end sleeves. To connect the wire, loosen the screw, insert the wire end into the
terminal hole and tighten the screw. The outer diameter of the cable must not exceed 8
mm.
To use relay outputs, connect the chosen actuators to the relay terminals RE1 and/or RE2.
NOTE! Actuator short-circuits shall be avoided. To protect the instrument relays, use
external fuses or safety switches.
3. Place the lid back and fix it with the screws. Make certain that the cable glands are
properly tightened to ensure the conformity to IP65 protection class.
4. Turn on the power. It may take up to five minutes after switching on for the sensor to
stabilize.
For stable operating, it is recommended to keep the detector powered constantly, except
for periods of maintenance, calibration, replacement, etc.
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E2630-NO2 Rev 23.03.2021
Operation
During the first ca. 60 seconds after powering on E2630 performs a warming-up and
self-diagnostic routine, indicated by the flashing of each LED. The upper dual-color LED
remains continuously green in normal operation and blinks red in case of device or sensor
fault. The warm-up time depends on the sensor type, unpowered period, and atmosphere.
During the first 30 seconds after powering on you may select the automatic or manual
mode of alarm release. Touch the device with the magnet key on the spot shown in the
drawing below.
A short touch (< 2 s) enables the automatic mode, a touch of 2...10 s — manual mode. The
activation of the automatic mode is followed by a single LED blinking and acoustic signal.
If manual mode is activated, the double acoustic and light signal follows.
If the gas concentration exceeds the LOW alarm setpoint, the bottom red LED starts
flashing at a rate of 1 Hz, and the relay RE1 switches over. The first alarm stops
automatically if the gas concentration drops below 70% of the LOW alarm setpoint.
If the gas level exceeds the HIGH alarm setpoint, the bottom red LED starts flashing and
the buzzer starts beeping at a rate of 2 Hz, and also the relay RE2 switches over.
Depending on the selected release mode, the HIGH alarm stops automatically or can be
stopped with a short touch of the magnet key, if the gas level has dropped below 70% of
the LOW alarm setpoint. Upon contact, the key should activate the reed switch located left
of the sensor inside the device.
Apart from the warming-up period, a 2....10 s touch causes the device to reset and perform
the self-diagnostic routine for testing purposes. To check the visual and acoustic alarm,
touch the device with the magnet key for more than 10 s. This will launch blinking and
beeping (stops as soon as the key is withdrawn).
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E2630-NO2 Rev 23.03.2021
Sensor probe handling
The sensor probes of all types are equipped with a hydrophobic microporous PTFE filter to
protect the sensor from dust, dirt, and water drops. The filter may be replaced if it gets
strongly contaminated. To replace the PTFE filter, unscrew the sensor head cap and
remove the old filter. Place a new filter into the cap and tighten it again.
NOTE! Never stab or press the filter near its center where the sensor is located since this
may damage the sensor. Do not remove the filter as it may cause the device to show
incorrect values and/or break the sensor.
The recommended orientation of the sensor probe is vertical with the sensor tip pointing
downwards. This prevents the possible accumulation of condensed water on the sensor
protection filter.
The electrochemical gas sensor replacement procedures
1. Un-power detector;
2. Unscrew sensor head cap;
3. Carefully take out the sensor cell;
4. Disconnect the first wire from the old sensor and connect to the same pin on the
new sensor;
5. Disconnect the second wire from the old sensor and connect to the second pin on
the new sensor;
6. Insert the new sensor into the sensor head and screw back the sensor head cap.
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