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.
Pressure transmitters PC-28, PCE-28 are designed to measure positive gauge pressure, vacuum pressure and absolute pressure of gases, vapors and liquids.The transmitters PC-28P, PCE-28P are designed to measure of level of liquid.Differential pressure transmitters PR-28, PRE-28 are designed to measure liquid levels in closed tanks and to measure differential pressure across constructions. The electronic part is identical in all versions.The active sensing element is a silicon diaphragm with in-diffused piezoresistors located in a sensing module.The electronic part amplifies and standardizes the signal from measuring bridge to the output signal 4 to 20 mA.The electronic circuitry except of filter board is encapsulated in a stainless steel enclosure.The external circuit connection facility differs according to the model as follows:
The transmitters intended for use as group II equipment are allowed to be installed into the partition between the hazardous areas zone 0 and zone 1. Technical parameters: Ui = 28 V DC; Ii = 0.1 A; (for linear power supply characteristic), Ii = 0,08 A (for rectangular or trapezial power supply characteristic). Pi = …see the table in attachment , Li = 0.9 mH; Ci = 40 nF
Ambient temperature: Ta …see the attachement
Instruction for use - see document DTR.PC.PR-28