Black & Decker MULTI-GAS DETECTORS User Manual download pdf (Page 37)

GasAlertMax

Alarms

Gas Exposures Computed

a Warning

To avoid possible personal injury, do not

deactivate the detector during a work shift. The

detector automatically resets the TWA, STEL,

and maximum (MAX) gas exposures at start-up.

If you reactivate the detector during a work

shift, these values will not reflect the entire

work shift.

Table 7. Computed Gas Exposures

Gas Exposure Description

TWA

(CO and H

only)

•

Time-weighted average based

on accumulated exposure to

toxic gases averaged over a

workday

•

Accumulated value.

STEL

(CO and H

only)

•

Short-term exposure level base

on a 5-15 minute period (user

selectable).

•

Accumulated value.

Maximum*

(Peak)

•

Highest gas level encountered

during the period the detector is

turned on.

* For oxygen, it is the highest or lowest concentration

encountered.

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Black & Decker MULTI-GAS DETECTORS User Manual Page 37