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 electrical 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 PMF Position Indicator is designed to provide an electrical signal which gives an indication of the mechanical position of an external magnet. This signal may take the form of incremental changes in resistance over the full measurement range and in addition the indicator offers independent switching zones at various defined positions along the length of a stainless steel measurement tube. The outer stainless steel measurement tube contains an inner insulating tube which contains an encapsulated, printed circuit board. The printed circuit board has a resistive ladder network, with reed switches actuated by the external magnet. The printed circuit board is also fitted with reed switches placed at pre-defined positions and may be used to switch an external circuit at specific positions of interest along the length of the measurement tube. The full length of this inner insulating tube, including the printed circuit board, resistive ladder network and all the reed switches, is encapsulated. External electrical connections to the switches and ladder network are made at seven terminals, within a circular IP67 stainless steel junction box fitted with a screwed lid and gasket, which is locked with a grub screw. A separate earth terminal is provided for an earth connection if required, but this is not required for the safety of the circuit. The terminals are suitable for customer cables with conductors having a cross section area of between 0.5mm2 and 2.5mm2 Cables enter the junction box via a suitably certified Ex e cable gland and must maintain IP67.Variation 0.1To permit the ladder network to be omitted from the PMF Position Indicator and two alternative switch patterns to form PMG and PMH Position Indicators. See Annex for details of the PMG and PMH Position Indicators and the Input parameters for all units