BW Technologies GasAlert Extreme User Manual download pdf (Page 46)

GasAlert Extreme

User Manual

Automatic Shutdown Alarm

There are two situations when an automatic shutdown alarm

occurs:

1. If the battery voltage is in immediate danger of

dropping below the minimum operating voltage, the

audible alarm beeps eight times, the visual alarm

flashes eight times, and the detector emits eight

vibrations. After 3 seconds, the LCD powers off and

the detector stops normal operation. The LCD

periodically displays the low battery icon

until the

battery power is depleted.

For directions about how to replace the battery,

refer to

Replacing the Battery or Sensor.

Note

The low battery alarm continues for approximately

30 minutes before an automatic shutdown occurs.

2. If the calibration past protection user option is

active and the detector is past the calibration due

date, the detector performs an automatic shutdown.

Calibration and Setting Alarm Setpoints

Guidelines

When calibrating the detector, adhere to the following

guidelines.

• Recommended gas mixture:

: clean air, 20.9% vol.

CO (low H

sensitivity): 50 to 500 ppm balance N

CO: 50 to 500 ppm balance N

S (high range): 10 to 100 ppm balance N

S (low methanol): 10 to 100 ppm balance N

S: 10 to 100 ppm balance N

: 1 to 5 ppm balance N

: 10 to 50 ppm balance N

: 3 to 25 ppm balance N

: 20 to 100 ppm balance N

: (high range) 20 to 100 ppm balance N

: 5 to 50 ppm balance N

HCN: 5 to 20 ppm balance N

ETO: 5 to 50 ppm balance N

ClO

: 0.1 to 1.0 ppm balance N

NO: 10 to 250 ppm balance N

• For ETO detectors (before each day’s use) allow the

instrument to fully stabilize in the temperature that it is to

be operated in and then zero the detector.

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BW Technologies GasAlert Extreme User Manual Page 46

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