Tender For corrigendum : supply of lab instruments for calibration of c and i instruments for unit 1 to 4 ,stage-1,2 ctpp o and m, chhabra. - true rms digital multimeter( technical specification as per annexure -i), portable loop calibrator( technical specification as per annexure -ii), electric portable pressure calibrator(range: 0-300 psi)( technical specification as per annexure -iii), reference pressure guage with adeptors (range: 0-3000 psi)( technical specification as per annexure -iv), velometer with stud and cable for portable vibration meter( technical specification as per annexure -v)