background image

 

Sensor Calibration 

 
Gas detectors must be calibrated and periodically checked to ensure detectors accuracy and system 
integrity. It is important to install stationary gas detectors at locations where the calibration can be 
performed easily. The intervals between calibration can be different from sensor to sensor. However, it is 
good practice to check the detector during the first 30 days after installation. During this period, it is 
possible to observe how well the detector is adapting to its new environment. If the detector functions 
properly for 30 continuous days, this provides a good degree of confidence about the installation. Any 
possible problems can be identified and corrected during this time. Experience indicates that a detector 
surviving 30 days after the initial installation will have a good chance of performing its functions for the 
duration expected. Most problems such as inappropriate detector location, interference from other 
gases, or the loss of sensitivity will arise during this time. Afterward, a maintenance schedule, including 
calibration intervals, should be established.  
 
Normally, a 6-monthly calibration period is adequate to ensure the effectiveness and sensibility of each 

sensor. This check will also afford you the opportunity to maintain the system’s accura

cy.  

 

Calibration Procedure 
 

Calibration of the gas detector includes two steps. First the “zero” must be set and then the “span” must 

be calibrated. 
 

1.

 

To initiate calibration press and hold the tactile button on the PCB or place the magnetic gas 
calibration cup. 

2.

 

After 5sec all LED’s will flash.

 

3.

 

After 2 more seconds the yellow LED will turn OFF, red LED is ON and the green LED is flashing 
once every second for the period of 30 seconds. In this case you may chose from the following:    
-To calibrate the sensor 

 continue holding the button and apply zero gas;                                            

-To refuse calibration on ZERO air 

 release the button (remove the magnetic cap) 

 red LED will 

flash for 2 seconds. 

4.

 

Green LED and red LED start to flash alternately. Now you must apply the span gas and again 
press and hold the button or place the magnetic gas calibration cup. Now the alarm levels are 
automatically adjusted. Red LED lights and green LED are flashing twice at every 2 seconds for 30 
seconds. In this case you may choose from the following:                                                                           
-To calibrate the sensor 

 continue applying span gas for 30 seconds and the red LED will flash for 

2 seconds confirming alarm levels settings;                                                                                                  
-To refuse calibration of alarm levels 

 release the button or remove the magnetic cap and the 

red LED will flash for 2 seconds. 

5.

 

When you complete 

the above steps, calibration is finished, and all LED’s will flash for 5 seconds.

 

 
 NOTE: If during the calibration you release the button or remove the magnetic cap for more than 4              
minutes, calibration will be terminated and the previously saved values for pure air and alarm levels will 
be recovered. 
 
 
 
 
 
 
 

Summary of Contents for ZetaGas GS-220.BC.V.ZETA.MET.100

Page 1: ...1 Operation Manual ...

Page 2: ...ng method 5 Front View 6 Inside View 6 Installation and Wiring 7 Mounting the Sensor 7 Mechanical Mounting 7 Electrical Connection 7 Analogue gas detector GS 220 BC V ZETA 8 Operating Instructions 8 Initial stabilisation 8 Working mode 8 Alarm 1 8 Alarm 2 8 Alarm 3 8 Fault 8 Sensor calibration 9 Maintenance servicing 10 Cleaning 10 Servicing 10 Servicing frequency 10 Ordering codes 11 ...

Page 3: ...rmation please contact Zeta Alarms Ltd Manufacturer reserves the right to modify the technical characteristics if its equipment without notice to improve product performance Safety Warnings Installation and electric connections should be performed by a qualified professional according to Manufacturer s specifications and to the standards of authorities in the field Failure to observe these rules m...

Page 4: ...Alarms Ltd nor any other affiliated organization shall be held liable under any circumstances for any damage whatsoever including without limitations damages for loss of production interruption of production loss of information controller failure personal injury loss of time money or materials or the inability to use the product even in the event that Zeta Alarms Ltd had been informed of such dama...

Page 5: ... measuring methods are used 1 Catalytic sensors for measurement of explosive gases 2 Electrochemical sensors for toxic gases 3 Infrared sensors for CO2 4 Semiconductor sensors for refrigerant gases Table 1 DETECTED GASES See Table Ordering codes Gas feed Diffusion POWER SUPPLY Working voltage 12 30 VDC Power Consumption 3W OUTPUT SIGNAL GS 220 BC V ZETA 4 20mA ENVIRONMENTLE CONDITIONS Working temp...

Page 6: ...tor GS 220 BC V ZETA Inside view gas detector GS 220 BC V ZETA 1 Sensor housing 2 LED indication 3 Cable entry 1 PCB 2 Service connection port 3 Intrinsically safe power converter 4 Connection terminals 5 Calibration button ...

Page 7: ...stalled at face respiration level When deciding on the position for the transmitter make sure that it is always accessible for service and maintenance Mechanical mounting Gas detector is attached to the wall via 4 mounting screws Sensor opening to be placed downwards Drill 4 holes according to the drilling diagram Drilling diagram Electrical connections The electrical connection must be carried ou...

Page 8: ...ntration Indication Green LED is flashing slowly 3 Alarm 1 First alarm level is reached Indication Red LED is flashing slowly 4 Alarm 2 Second alarm level is reached Indication Red LED is flashing quickly 5 Alarm 3 Third alarm level is reached Indication Red LED lights permanently 6 Fault Sensor element fault Indication Orange LED is flashing Connection Diagram GS 220 BC V ZETA Analogue Gas Detect...

Page 9: ...as detector includes two steps First the zero must be set and then the span must be calibrated 1 To initiate calibration press and hold the tactile button on the PCB or place the magnetic gas calibration cup 2 After 5sec all LED s will flash 3 After 2 more seconds the yellow LED will turn OFF red LED is ON and the green LED is flashing once every second for the period of 30 seconds In this case yo...

Page 10: ... The type of test consists of injecting a standard gas mixture of sufficient concentration into the detector to set off the preadjusted alarms This test does not replace a full calibration of the detector Frequency of the gas testing depends on the industrial application in which the detectors are used Inspection should be done frequently the first months after installation starts up later it may ...

Page 11: ... 220 BC V ZETA 410A 2000 R 410a 0 2000ppm GS 220 BC V ZETA 290 2000 R 290 0 2000ppm Model ordering code Detected gas Gas concentration GS 220 BC V ZETA MET 100 METHANE 0 100 LEL GS 220 BC V ZETA PRO 100 PROPANE 0 100 LEL GS 220 BC V ZETA BUT 100 N BUTANE 0 100 LEL GS 220 BC V ZETA PEN 100 N PENTANE 0 100 LEL GS 220 BC V ZETA HEX 100 N HEXTANE 0 100 LEL GS 220 BC V ZETA HEP 100 N HEPTANE 0 100 LEL ...

Page 12: ...12 ...

Reviews: