Compur Ex plus Gas Detector User Manual download pdf (Page 10)

Operation Triple Plus+ and Triple Plus+ IR

level by pressing the UNMARKED button. The peak gas level will

then be displayed again from then on.

In addition to the messages described above, if alarms are muted the message

‘MUTED’ will flash with the sensor name and units.

2.3 Overrange

If a flammable sensor’s signal is out of range then the instrument may be

configured, via a PC and the Portables PC software, to either flash the relevant

numbers on the display, or to display a message of the form 'SENSOR FAILURE'

and the name of the failed sensor. The alarm sounder will activate. This type

of error could indicate a high gas level or sensor failure. Calibration should be

checked after such a warning.

2.4 Cautions

Sensors may be adversely affected by exposure to silicones, lead compounds,

high levels of hydrogen sulphide and chlorine, and some industrial solvents.

A condition of certification is that the instrument is not used with ethyl nitrate

vapours, or in hazardous areas containing IIC gases (e.g. hydrogen, acetylene)

where the risk of mechanical damage to the enclosure is high.

2.5 Backlight

In low ambient light conditions, the backlight can be activated to illuminate the

display by pressing the BACKLIGHT button. To switch off the backlight press the

BACKLIGHT button again, or it will turn off automatically after a configurable

timeout period of 10, 20 or 30 minutes. Alternatively, the backlight may be

configured to remain on permanently, or to never timeout once switched on.

(See LIGHT in section 3.2, Configuration Options). In an alarm condition, the

backlight is automatically turned on.

2.6 Alarms

When the Triple Plus+/Plus+ IR encounters an alarm condition the red lights

flash, the beacons activate and the sounder emits a loud, fast bleep. Where

permitted instantaneous toxic gas alarms may be accepted by pressing the

UNMARKED button. In this case, the sounder is silenced but the red lights

continue to flash. With instantaneous alarms, the word 'ALARM' will flash

next to the gas name. Time Weighted Average exposure limit alarms will flash

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 39 40

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Compur Ex plus Gas Detector User Manual Page 10