Bacharach Gas Pup Spezifikationen PDF herunterladen (Seite 17)

Instruction 55-9002 11

Gas Pup

Backlighting

Backlighting of the LCD allows a user to see the display in darkened

areas. Be aware that backlighting causes a higher battery drain and

should only be used when needed. To conserve battery life, the backlight

is automatically disabled when the battery voltage falls below 2.2 volts.

To activate the backlight, briefly press the key. The backlight will turn

ON along with the battery voltage being displayed for about one second.

The backlight automatically turns OFF after 5 minutes, or it can be

immediately turned off by again briefly pressing the key.

Battery Voltage Check

Battery voltage can be displayed by briefly pressing the key. Note that

this action also turns on the backlight.

Battery voltage is displayed in terms of the voltage available at the

printed circuit board from the battery source. The nominal voltage ranges

from approximately 2.8 volts to a minimum of 1.9 volts. Although the Gas

Pup will operate down to 1.9 volts, the last portion of the voltage curve is

quite steep. It is recommended that, except for short tests, the batteries

be replaced when the reading drops to less than 2.0 volts.

Gas Operating Mode

This is the default operating mode when no mode selection is made at

startup.

With the probe and hose assembly connected to the Gas Pup’s gas inlet

fitting, begin checking for gas by placing the probe tip into the area to be

tested. Wait approximately 15 seconds, and then observe the detected gas

level on the instrument’s LCD. The Gas Pup will display the detected gas

level in one of three ranges: PPM (0–2500 ppm), LO% (0.2–5.0%), and

HI% (0–100%).

WARNING: Explosion hazard. Should the display indicate a gas

reading near 5% (equivalent to 100% LEL), the instrument is

sampling from an area with a potentially explosive concentration

of gas. Take all necessary precautions to prevent ignition. Also,

if the detected gas concentration is above 15%, which is nor-

mally considered too rich to be explosive, the concentration

around the area sampled may be within the explosive range and

should be considered dangerous.

Operation

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Bacharach Gas Pup Spezifikationen Seite 17