Specifications

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3) Once the correct ID is selected the user should tap the “Purge” button. The sample pump will turn on and the

button will turn green. The timer will count down 90 seconds or until the O

percent in the meter is at least 18%

then the pump will turn off. The purge cycle may end if either the Envision® meter detects that the sample train

is clear of methane or the user taps the “Purge” button again.