Evikon E2630-CO Manuale utente



Carbon Monoxide Detector

E2630-CO



User Manual



E2630-CO Rev 14.12.2020
Table of contents
Carbon Monoxide 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-CO options 11
Warranty 12
Manufacturer contacts 12
 
2

E2630-CO Rev 14.12.2020

Carbon Monoxide

A Colorless, odorless, and tasteless gas that is highly toxic. Carbon monoxide is formed as              

a result of incomplete combustion of carbon-containing compounds, e.g. while operating a           

furnace, an oven, or an engine when there is a limited supply of air.

Synonyms: Carbonous oxide, Carbon (II) oxide, Flue gas, Monoxide



Conversion of ppm to mg/m3 is calculated for 25°C and 1 atm.



 

3

Chemical formula

CO

Molar weight

28

Relative gas density (to air)

0,97

Conversion

1 ppm= 1.15 mg/m3

Boiling point

-191.5 °C

Low explosive limit (LEL), % vol. in air

12.5

Upper explosive limit (UEL), % vol. in air

74

Odor

odorless

Hazards

Highly toxic. Mild poisoning causes lightheadedness,

confusion, headache, dizziness, and flu-like effects.

Larger exposures can lead to toxicity of the CNS and

heart, and death. After acute poisoning, long-term

problems may occur. CO also has negative effects on a

baby if exposed during pregnancy. Chronic exposure to

low levels can lead to depression, confusion, and

memory loss.

Exposure

limits (ACGIH)

TWA

40 mg/m3 /35 ppm

STEL

1380 mg/m3 /1200 ppm

E2630-CO Rev 14.12.2020

Specifications

4

Sensor type

Electrochemical cell

Sampling method

Diffusion

Typical detection range

0...200 ppm

0...1000 ppm

Alarm setpoints

(release-LOW-HIGH)

18 - 25 - 125 ppm

88 - 125 - 250 ppm

Response time T90

< 30 seconds

Signal update

Every 1 second

Sensor lifetime

> 6 years

Calibration interval

6 months

Power supply

11...30 VDC,

24 VAC or 90...265 VAC as options

Power consumption

< 2 VA

Digital interface

UART

Relay outputs

2 × SPDT, max 5 A, 30 VDC / 250 VAC

Alarm signaling

Buzzer 2 kHz, 85 dB; red LED

LEDs

Green/red (operation/fault), red (gas alarm)

Enclosure

Grey ABS, wall mount, protection class IP65

Dimensions

H90 × W145 × D55 mm (overall 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

-20...50°C, 15...95% RH without condensation, 0,9...1,1 atm;

Non-ATEX-rated areas

Avoid strong mechanical shock, vibrations or EMI Avoid exposure to

corrosive gases

NOTE! The sensor may exhibit sensitivity to acetylene, ethylene, hydrogen,

and nitric oxide.

E2630-CO Rev 14.12.2020

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. 24 VAC or 230 VAC power supply options are available.

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 at the atmospheric             

pressure ±10% and 15...90 %RH without condensation 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.

5

E2630-CO Rev 14.12.2020

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.),

●Carbon monoxide has practically the same density as air and spreads evenly in            

the room. Install the sensor in proximity to possible leakage or generation source,            

taking into consideration the temperature of the gas, the air currents in the room,             

etc.

●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.

 

6

E2630-CO Rev 14.12.2020

Mounting dimensions



7

E2630-CO Rev 14.12.2020

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 AC/DC 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 mm2. 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 and calibration, replacement, etc.

8

E2630-CO Rev 14.12.2020

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 80% 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 80% 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).

9

E2630-CO Rev 14.12.2020

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 M25 nut and remove the old              

filter. Place a new filter into the nut 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.

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.

 

10

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