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Linearity Settings for Supported Refrigerants Diagnostics • 15

5.3 Linearity Settings for Supported Refrigerants

Factors such as air movement and the proximity of the sensor to the leak will usually have a greater influence on the

reading (Rdg) than the differences in the linearity (accuracy) of the various supported refrigerants, so the alarm limits

should not have to be adjusted. However, depending on the refrigerant selection, you may want to fine tune the alarm limit

by increasing the limit for the refrigerants with linearity ranges in the 25-50 PPM range that are greater than +/- 10 PPM

to avoid alarming at too low of a count.

If the linearity range is greater than +/- 10 PPM you would increase the alarm limit by the amount it is above +/-10

PPM. For example, if your were using R-410A you may want to increase the alarm limit by 5 PPM, so an alarm limit for

R-410A of 40 PPM would be increased to 45 PPM.

Linearity R-22 R-134a R-404A R-407A R-407C R-410A R-422A R-422D R-427A R-507

25-50 PPM

+/-10

PPM

+/-10

PPM

+/-10

PPM

+/-15

PPM

+/-17

PPM

+/-15

PPM

+/-12

PPM

+/-15

PPM

+/-15

PPM

+/-17

PPM

60-1000

PPM

+/-20%

of Rdg

+/-20%

of Rdg

+/-20%

of Rdg

+/-30%

of Rdg

+/-45%

of Rdg

+/-30%

of Rdg

+/-25%

of Rdg

+/-30%

of Rdg

+/-30%

of Rdg

+/-45%

of Rdg

Table 5-2 - Linearity Settings for Supported Refrigerants

1 2 ... 16 17 18 19 20 21 22

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