Black & Decker MULTI-GAS DETECTORS Manuel d'utilisateur télécharger pdf (Page 27)

BW Defender2

User Manual

Alarms

Table 6 describes the detector alarms and shows how the

display looks for each alarm.

Table 7 describes the computed gas exposure for

the Time Weight Average for TWA (LTEL).

LTEL (Long Term Exposure Limit) = TWA

During an alarm condition, the detector activates the

backlight and the display shows the current ambient gas

reading. Gas alarms are latching.

The High Alarm overrides a TWA alarm and a TWA Alarm

overrides a Low Alarm.

Table 6. Alarms

Alarms Display Alarms Display

Instant Low Alarm:

• Slow modulating tone

and flash.

• ALARM and target

gas bar flash.

Instant High Alarm:

• Fast modulating tone

and flash.

• ALARM and target

gas bar flash.

Latching Alarm User Option: If the Latched Alarm function is turned ON, the audible and visual alarms continue to sound and

flash until the Low or High Alarm condition is acknowledged. Press to deactivate the audible and visual alarms when the current

ambient gas reading falls below the low alarm level. The alarms cannot be deactivated if an alarm condition is still present.

A TWA alarm condition will not reset.

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Black & Decker MULTI-GAS DETECTORS Manuel d'utilisateur Page 27