Heath-consultants Optical Methane Detector (OM) Manual do Utilizador descarregar pdf (Página 32)

CALIBRATION

Verifying Calibration with External Cell:

The standard external calibration cell is 0.6 inches thick

internally. This is approximately 1/100

of the entire external

light path (the distance between the two lenses) for a standard

crossbar. Therefore, the display will read 100 times lower than

the actual gas in this cell. Place this cell in the center of the

light path and observe the PPM reading on the display. The

display should read the value imprinted on the calibration cell

relative to the crossbar length you are using.

Again, if your OMD varies from calibration by more than ±

10% within a range of 1 to 100 PPM, it should be examined by

a trained technician.

1 2 ... 27 28 29 30 31 32 33 34 35 36 37 ... 61 62

Sem comentários

Heath-consultants Optical Methane Detector (OM) Manual do Utilizador Página 32