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T4 Portable Multigas Detector
© 2022 Crowcon Detection Instruments Limited
Safety Information
T4 is a hazardous area certified gas detector and as such must be operated and maintained in strict accordance with the instructions,
warnings and label information included in this manual. T4 must be operated within the limitations stated.
• Read and understand all instructions in the operation section of this manual prior to use.
• Before use ensure that the equipment is in good condition, the enclosure is intact has not been
• damaged in any way.
• If there is any damage to the equipment do not use, contact your local Crowcon office or agent
• for repair/replacement.
• Do not disassemble or substitute components as this may impair intrinsic safety and invalidate
• safety certification.
• Only genuine Crowcon replacement parts must be used; substitute components may invalidate certification and warranty of the
T4 and accessories, reference “Service and Maintenance” section for details.
• No live maintenance is permissible.
• Observe all warnings and instructions marked on the unit and within this manual.
• Observe site health and safety procedures for gases being monitored and evacuation procedures.
• Understand the screen display and alarm warnings prior to use.
• If this product is not working properly, read the troubleshooting guide and/or contact your local
• Crowcon office or agent, for details reference the ‘Crowcon Contacts’ section of the manual
• Ensure maintenance, service and calibration is carried out in accordance with the procedures in
• the manual and only by trained personnel.
Charging & Communication (Um = 9.1V)
• The T4 re-chargeable battery must only be charged in non-hazardous (safe) areas.
• Only connect to T4 in a safe area for charging or communications.
• T4 must not be charged or have communication to the device, at ambient temperatures outside
• the range 0°C to +40°C.
• T4 has been certified and marked Um = 9.1V therefore, if charging T4 via the T4 Charger Cradle use only Crowcon supplied
AC Adaptor. Otherwise this may impair intrinsic safety and invalidate safety certification.
• T4 has been certified and marked Um = 9.1V therefore, if charging T4 via the T4 10 way charger use only Crowcon supplied
AC Adaptor. Otherwise this may impair intrinsic safety and invalidate safety certification.
• Alternative charging and communication cable assemblies types “power cable”, “communication cable”, “power and
communication cable”, “vehicle power cable”, ”cradle power and communications” and “cradle charger“ are suitable for use with
T4.
• Refer to Power & Communication Cables Technical Data” manual (M07996) for further details.
• These devices are intended for use in normal atmospheric conditions of temperature –20 °C to +55 °C; pressure 80 kPa (0,8
bar) to 110 kPa (1,1 bar); and air with normal oxygen content, typically 21 % v/v (volume/volume).
• T4 ‘Type 1’ (as indicated on the certification label) may be used in Zones 0, 1 and 2, for Group llA, llB and llC gases and vapours
and for Temperature Classes T1, T2, T3 and T4. (see Certification label below).
• T4 ‘Type 2’ (as indicated on the certification label) may be used in Zones 1 and 2, for Group llA, llB and llC gases and vapours
and for Temperature Classes T1, T2, T3 and T4. (see Certification label below).
