Black & Decker MULTI-GAS DETECTORS Operator's Manual download pdf (Page 18)

Page 18

CONFINED SPACE

The presence of a hazardous atmosphere is a major threat to workers in confined

spaces. Special precautions are required - for workers who must enter a confined

space - to protect workers from flammable or toxic atmospheres, oxygen depletion or

enrichment.

To reduce the hazard, it is required that the atmosphere be tested prior to entering the

confined space. In addition to monitoring prior to entry, it is required that the

atmosphere be constantly monitored during entry and as long as people are in the

confined space.

The BW DEFENDER is factory set to recommended alarm setpoints for:

OSHA (Occupational Safety and Health Association), and

OHS (Occupational Health and Safety)

The first alarms are set: Combustibles: 10 % LEL

Oxygen: 19.5 % Vol.

Carbon Monoxide: 35 ppm

Hydrogen Sulfide: 10 ppm

BW DEFENDER alarm setpoints are field adjustable for special applications.

DAILY OPERATION

1. Turn your BW DEFENDER “ON”. All features and functions are activated. Leave

the BW DEFENDER ON for the entire work shift to collect TWA (Time Weighted

Average) and PEAK Exposure data.

2. In the event of a hazardous gas alarm take appropriate precautions immediately.

A gas alarm takes priority over any other types of alarms.

3. TEST ALARMS: Verify proper alarm function prior to use with BW’s “Bump” Alarm

Test Gas. Alarm Test Gas is not intended to replace routine calibration, but rather

to confirm proper alarm function between calibrations.

Apply Test Gas. All sensors should be in alarm while the gas passes over the sen-

sors. Check and confirm operation of: LEDs, Alarm Icons, Backlight, and Audible

Alarm.

Note: Small quantity of gas required. DO NOT blast the sensors with “Bump” gas.

CAUTION: Any rapid up-scale reading followed by a declining or erratic reading may

indicate a gas concentration beyond upper scale limit which may be hazardous.

CAUTION: High off-scale readings may indicate an explosive concentration.

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Black & Decker MULTI-GAS DETECTORS Operator's Manual Page 18