procedure, then display HF concentration in PPM (see Figure AF.1) “Self Diagnosis” The unit is now ready to sample gas 2 Place the end of the sample tube at the desired location for gas sampling 3 Wait approximately 10 seconds for the sample to reach the sensor. This number is based on the use of a inner diameter tube that is three feet long as the sample probe. It must 4 1/8” be scaled for probe length. The reading is now valid 5 To turn unit off, press the Power/Enter button and hold down until a series of 15 audible 6 are heard. The unit will display and power itself down “beeps” “Good-Bye” Store the unit in the EP Tool area PPE cabinet 7 Figure AF.1 Hand-Held HF Gas Detector Display
“Self Diagnosis” procedure, then display HF concentration in PPM (see Figure AF.1) 2 The unit is now ready to sample gas 3 Place the end of the sample tube at the desired location for gas sampling 4 Wait approximately 10 seconds for the sample to reach the sensor. This number is based on the use of a 1/8” inner diameter tube that is three feet long as the sample probe. It must be scaled for probe length. 5 The reading is now valid 6 To turn unit off, press the Power/Enter button and hold down until a series of 15 audible “beeps” are heard. The unit will display “Good-Bye” and power itself down 7 Store the unit in the EP Tool area PPE cabinet Figure AF.1 Hand-Held HF Gas Detector Display
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