Honeywell DCP552 Mark II 사용자 설명서

■ O

● Objective

As the O

2

sensor starts to deteriorate, its output impedance increases. This function

checks sensor output impedance and turns on the O

2

sensor error event when the

impedance exceeds 130kΩ.

● Setting

•One of the values set for setup data 

to 

is set to 11 to assign the O

2

sensor check to an external switch.

•One of the values set for event configuration data setting 

to 

is set to

142 to assign an O

2

sensor error event.

● Operation

•Two methods are used to perform an O

2

sensor check. In one method the external

switch which has been assigned the O

2

sensor check function goes from OFF to

ON. This is called a constant check.

•The other method the external switch is turned on each 24-hour period. This is

called an automatic check.

•The impedance is checked when PV1 is 800 °C or more and the O

2

input is

1000mV or higher.

•The O

2

sensor error event goes on when sensor impedance exceeds 130k;Ω

otherwise it remains off.

•The constant check method is shown below.

•The automatic check method is shown below.

 

 

 

  

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