Black & Decker MULTI-GAS DETECTORS Manuel de l'opérateur télécharger pdf (Page 16)

Page 16

AUDIBLE / VISUAL ALARMS

GENERAL: Distinguish audibly and visually which gas hazard(s) is present, the alarm

level(s) and type(s) of alarm: LOW, TWA, HIGH, or Multi-Gas alarm. During the

different gas alarm pattern, the alarm LEDs blink on and off as the speaker sounds.

The speaker tone changes from a low tone to a high tone in a repeating pattern. The

backlight is on, and remains on for the duration of the alarm condition.

Table 3: Audible and Visual Alarms

LOW ALARM: Low alarm is activated when one

of the detected gases has exceeded its low

alarm setpoint.

HIGH ALARM: High alarm is activated when

one of the detected gases has exceeded

its high alarm setpoint.

Also, when the TWA (Time-Weighted-

Average) exposure to a toxic gas exceeds

the TWA alarm setpoint, High Alarm is

activated.

NOTE: In TWA alarm, the affected toxic gas

display(s) will blink even though the display

may read “00”. To view Accumulated

Exposures see page 11.

The Low and High Alarms stop when the ambient gas level returns to the acceptable

range.

MULTI-GAS ALARM: If more than one gas alarm hazard is present all alarm icons -

HIGH ALARM LOW - will blink along with the LCDs of the affected gases. The audible

will change from 1 Hz pattern to a 2 Hz pattern and back again. Thus, multiple-gas-

alarm appears as a combination of both low and high alarm.

CAUTION: If the combustible gas sensor is exposed to an over-range condition, the

sensor will be latched at over-range until the BW Defender is shut off and turned back

on again.

MAINTENANCE

The rugged BW DEFENDER is designed to provide years of service with regular care

and minimal maintenance.

1. Calibrate, test, and inspect the unit at regular intervals.

2. Keep an operations log of all events and occurrences.

EXTERIOR: Clean the BW DEFENDER exterior with a soft damp cloth. Do not use

solvents, soaps, or polishes on the detector.

DUST AND PARTICULATES: The Toxic and Oxygen sensors both have a

replaceable washable screen and a built-in washable screen. Without

opening the instrument, clean the screens with a soft, clean brush, water

and mild soap.

Caution: Replace dirty and/or plugged screens and sensors.

NOTE: The combustible sensor has a sintered steel flame arrestor screen. Clean

only with a dry brush.

WATER: Do not immerse in liquids. In the event the sensors become clogged by

water, clean immediately. Drain the sensors and dry with a clean cloth.

Wait several minutes for them to air dry. Check that they are clean.

CAUTION: Removing the Twin Toxic sensor from the BW DEFENDER for longer

than 10 minutes may destabilize the sensor. If this occurs, replace the

sensor in the board and turn on the BW DEFENDER for 30 minutes

before using.

13 22

Indicator Low Alarm High and TWA Level Alarm

ICON flashes “ALARM “HIGH ALARM”

Audible sounds at:

Tone-Pattern

1 Hz

Low to High -

2 Hz

Low to High - faster

LEDs: Both flash in sync with the affected Gas Readout.

LCD Gas Display: Affected Gas Readout Blinks at 2 Hz. Backlight is lit.

1 2 ... 11 12 13 14 15 16 17 18 19 20 21 ... 39 40

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Black & Decker MULTI-GAS DETECTORS Manuel de l'opérateur Page 16

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Produits connexes et manuels pour Détecteurs de monoxyde de carbone (CO) Black & Decker MULTI-GAS DETECTORS