Specifications

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5) For the first 20 seconds the “Calibration Status” will display “Initializing Gas Sensor”. The “Calibrate” and
“Restore Factory Calibration” buttons will stay inactive during the sensor warm-up phase. If your meter has
received a firmware update as of 9/1/2013 the sensors will always stay on, no longer requiring the 20 second
initialization. However, the O
2
sensor does not require a warm-up time and therefore never needs to go
through the Initializing gas sensor countdown.