Compur Ex plus Gas Detector User Manual download pdf (Page 6)

General description Triple Plus+ and Triple Plus+ IR

I. General Description

Triple Plus+

The Crowcon Triple Plus+ is a microprocessor controlled portable gas detector which

is capable of monitoring up to four gas types simultaneously and providing warn-

ing of hazardous levels. Using electrochemical, catalytic and thermal conductivity

sensors, the instrument may be configured to detect any practical combination of

oxygen, toxic and flammable gas. See Appendix 4 for notes on sensor limitations.

The built in data logging facility records gas levels of all four channels. The user

can choose the intervals at which subsequent readings are taken.They can then be

downloaded to a computer. In this way, a detailed evaluation of logged readings of

accumulated exposure can be made (see section 5). The user can then monitor pat-

terns of gas leaks and so provide essential information to an incident inquest.

The three part injection moulded TRIAX case is light yet durable and resistant

to water and dust. It houses a digital electronic circuit board, up to four sen-

sor modules, a piezo-electric alarm sounder and a power supply board which

restricts available current to the rest of the instrument and so ensures intrinsic

safety. The battery type is chargeable lead-acid which is accessible via an exter-

nal hatch to permit easy replacement and maximum instrument usage, but it is

more likely that the facility to recharge the instrument with the battery pack in

situ will be used. Crowcon have recently introduced the Lithium-ion recharge-

able battery pack, which offers superior performance over lead-acid batteries. If

your detector is not fitted with this new option, please contact your local agent

for details. The top panel incorporates a backlit liquid crystal alphanumeric

display on which gas levels and instrument messages appear, four embossed

tactile push-buttons to control instrument functions, a small green LED which

flashes periodically to confirm operation and a large high intensity red LED

which flashes when an alarm condition is encountered. Additionally, the top

panel includes two small windows through which the instrument sends infrared

signals when it is located in its dedicated Charger/Interface unit.

Triple Plus+ IR

Triple Plus+ IR is a specific version of the Triple Plus+ utilising an infrared sensor

for the detection and measurement of hydrocarbons, in place of the conven-

tional pellistor sensor. Using infrared technology in place of pellistor technology

has a number of advantages as follows:

(a) No requirement for oxygen in the background gas i.e. operation in

inert backgrounds

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Compur Ex plus Gas Detector User Manual Page 6