45 of 124  Construction of Giresun Wastewater Treatment Plant  Tender Dossier Volume 3 Employer’s Requirements  Section 08: Electrical Works  • Indicator has two lines and momentary and total flow values will be monitored at the same time and  also it will be possible to see from a distance whether momentary value and limit value is exceeded  with two coloured graphical indicator bar.  • During operation of the flow meter all calibration values will be saved in the memory of the equipment  and even if an electronic part is replaced due to a failure, previous values will be able to be loaded again  and they will not be allowed to disappear.  • Interior coating will either be Polyurethanehard rubber or teflon, etc. according to the characteristics of  the liquid to be measured.   Electrodes will be stainless steel 1.4435/316 L, tantalum, Alloy C22 and different material will be able to  be used according to the characteristics of the liquid to be measured.   Transmitter’s housing shall be Polycarbonate with plastic hinge between back plate and cover (non- volatile), has pluggable terminals and folding mains power touch protection  • Process connection: Flange (DIN or ANSI)  • Flange material: Carbon steel or Steel (Option: Stainless steel)  • Protection type: For transmitter IP67 for primary unit IP68.  • Supply voltage: 100-240 VAC/24VAC/DC  • Current output: 0/4...20 m A  • A switch output is going to be used for limit value or status (Empty pipe dedection or low flow cut off).  • Volume flow, Mass flow, Flow velocity, Conductivity and Electronic temperature shall be assignable  measured variables.  • Device will be seperate as sensor and transmitter. • Common  communication  protocols  and  interfaces,  such  as  0/4...20  mA  and  Ethernet  or  0/4…20mA/HART shall be integrated.  • Primary units, will be chosen as IP68 and they will be appropriate for accidental immersion in 3 m  depth under water  • The Contractor will provide primary units, pipes, flanges, fittings, etc. with flanges in compliance with  related requirements.  • To enable dismounting for repair and maintenance each primary unit will be supplied with dismounting  piece as a whole and will be installed.  • Primary of the flow meter will have an electrode to determine whether the pipe is completely full. The  signal that this electrode transmits will control the circuits inside the convector, and will turn on "Pipe  Is Not Completely Full" mode analogue signal circuit, and indicate with an indicator.  • All flow meter measuring devices, distances up and down the flow, installation type will be determined  by the manufacturer.  • Field windings will be completely guarded. • The flowmeter with integrated web server & sensor with EN ISO 12944 corrosion protection.  • The transmitter will have automatic self-diagnostic. 8_Vol3_d4 3_Section 8 electrical works_en_GIR rev6.doc 