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EW0826A4_en - rev. A 

Oxygen detectors 

 URS20SS 

05/10/2020 

Gas detection systems for industrial environments 

8/8

 

 

Key to marking 
information 

  Marking in conformity with all applicable EC Directives 

  Marking for all equipment in conformity with Directive ATEX 2014/34/EC 

II 

Equipment Group for surface industry 

Equipment category 3 for use in Zone 2 

G

 

Equipment intended for use in explosive gas atmosphere, caused by mixture of air 
and gas, vapours, flammable mist 

Ex nA nC d IIC T6 Gb

 

Types of protection complying with EN60079-0 and EN60079-15,

 

sensor body with type of protection d in compliance with EN60079-1 

BVI 07 ATEX 0033 

Type examination certificate 

-20°C 

 TA 

 +50°C 

Operating temperature range 

 

 

Installation data 

 

To be filled in by Installer 

Installer's stamp and 

signature 

Installation site: 
 
 

 

Product order number: 
 
 
Part Number: 
 
 

Manufacturing date: 

Installation date: 
 
 

Replacement date: 

 

Routine checks 

 

To be filled in by Installer / Service Personnel 

Signature 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Remarks 

 
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Due to our policy of continuous product improvement, specifications are subject to change without notice. 

 

Содержание EsiWelma Sensigas URS20SS

Страница 1: ...eaks in hospitals laboratories welding centres and more in general where oxygen is stored Oxygen deficiency is an indirect measurement of the presence of other explosive or asphyxiant gases that deple...

Страница 2: ...umption mode applications at 1 or 2 thresholds 4 20mA Output reference selection 4mA 0 O2 20mA 30 O2 0mA no alarm 10mA 1st threshold alarm 20mA 2nd threshold alarm by jumper selectable polarity 4 20mA...

Страница 3: ...nstructions for location of the detectors The detectors must be installed 1 where accidental gas leakages are possible 2 at least 1 5m away from heat sources or from vent holes 3 not in spaces where v...

Страница 4: ...n order to change the default settings switch off the power supply input the new settings at the JP2 jumper circuit or at the S1 DIP switch as shown in the diagram then power up again in particular Th...

Страница 5: ...Step 1 Insert the connection slot provided with the relay card into the control card making sure the flexible tab is towards the main terminal board Find CN3 connector CN3 connector Connection slot fl...

Страница 6: ...on The sensors are factory calibrated so they normally do not require any other calibration once installed Still after installation an operational check of the sensors is recommended The detector will...

Страница 7: ...return the sensor concerned to the supplier installer who in turn will send it back to the manufacturer Sensors may need to be re calibrated using the TUL40 calibration kit and the TUS40 20 handheld t...

Страница 8: ...gas vapours flammable mist Ex nA nC d IIC T6 Gb Types of protection complying with EN60079 0 and EN60079 15 sensor body with type of protection d in compliance with EN60079 1 BVI 07 ATEX 0033 Type exa...

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