This certificate is issued as verification that a sample(s), representative of production, was assessed and tested and found to comply with the IEC Standard list below and that the manufacturer's quality system, relating to the Ex products covered by this certificate, was assessed and found to comply with the IECEx Quality system requirements. This certificate is granted subject to the conditions as set out in IECEx Scheme Rules, IECEx 02 and Operational Documents as amended.
This Unit verification certificate is issued as verification that the Apparatus identified on page 1, was assessed and tested and found to comply with the IEC Standard list below. This certificate is granted subject to the conditions as set out in IECEx Scheme Rules, IECEx 02 and Operational Documents as amended.
The apparatus and any acceptable variations to it specified in the schedule of this certificate and the identified documents, was found to comply with the following standards:
As this is a Unit Verification Certificate, no QAR is applicable as this certificate is specific to the items listed by serial number or other unique identification.
The Temperature Transmitter type LI-24ALW is designed to convert temperature signal into an electrical signal. The apparatus comprises several printed circuit boards and LCD, all housed in a metal enclosure which can be made of light alloy for group II and III applications but only of stainless steel for mine (group I) application. One of the housing cover contains a window.External connections are made via integral terminals and cable glands which must be of certified type if they are mounted on the version for combustible dust hazard application.The transmitters intended as EPL Ga/Gb equipment shell be installed into the partition between the hazardous areas of EPL Ga and Gb.Temperature classes T4, T5 or T6 depend on the input power and maximum ambient temperature – see bellow.
Input parameters:a) supply from a power source with linear output characteristic:Ui = 30 V; Ii = 0,1 A; Ci = 2,5 nF; Li = 18 µH; Pi = 0,75 W; Ta = 80°C & T4; Ta = 70°C & T5;Pi = 0,5 W; Ta = 45°C & T6, Tm > 80°C & T* according to DTR.LI24.ALW.01b) supply from a power source with trapezoidal output characteristic:Ui = 24 V; UQ = 48 V; Ii = 50 mA; Ci = 2,5 nF; Li = 18 µH; Pi = 0,6 W; Ta = 80°C & T5Pi = 0,5 W; Ta = 45°C & T6, Tm > 80°C & T* according to DTR.LI24.ALW.01c) supply from a power source with rectangular output characteristic:Ui = 24 V; Ii = 25 mA; Ci = 2,5 nF; Li = 18 µH; Pi = 0,6 W; Ta = 80°C & T5,Tm > 80°C & T* according to DTR.LI24.ALW.01Tm- medium temperature
Output parameters:Uo = 6.6 V; Io = 9,8 mA; Po = 14,5 mW; Lo = 400mHCo = 1000µF for IIA; Co = 480 µF for IIB; Co = 3,5 µF for IICDegree of protection: IP65, IP66/IP67Minimum ambient temperature: Ta min = - 40°C
The operating instructions must be taken into account during installation.The ambient temperature range is reduced to Ta = -20°C to +60°C if the device is installed as Ma equipment.
For the medium temperature Tm>80°C temperature class T* and the maximum surface temperature T* should be set according to the current manual.Version of device with surge arrester does not meet the 500V rms test required by IEC 60079 11:2011. This must be taken into account when installing the device.