Rki-instruments GX-94 Manual do Utilizador descarregar pdf (Página 25)

GX-94 Operator’s Manual Page 24

Short-Term Exposure Limit (STEL) Screen

The STEL function shows the average reading for H

S and CO during

the last 15 minutes. These values are not affected by the Lunch Break

function and are reset every time the unit is turned off.

Time-Weighted Average (TWA) Screen

The TWA function shows the average reading for toxic gases during the

last 8 hours. If 8 hours has not elapsed since the last time the STEL/

TWA was cleared, the average is still calculated over 8 hours, with the

missing time assigned a 0 value for readings.

When the Lunch Break RESUME option is selected during start-up, the

GX-94 will include the TWA from the last session.

STEL

H2S 0.

PPM

CO 0PPM

TWA

H2S 0.

PPM

CO 0PPM

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