Tender For corrigendum : custom bid for services - annual maintenance contract for bet instrument in r&d center and qc lab, alumina plant, nalco, damanjodi ; work shall include routine maintenance, performance checks, re-alignment, repair and replacement of defective components and parts of the bet analyser and associated instruments including the followinga) checking & cleaning of the total system., b) carrying out all required calibration., c) electrical & mechanical functional checks and adjustments., d) replacement of normal wear parts and check of outer conditions .