supply of voltmeter nw 72, 0-1000 v ac. , analog voltmeter 0-1000v,nw 72 square panel mounting type ac insulation class-i, accuracy 1.5% size 72x72 mm with 750v marking suitable f or fixing in lhb ac coaches sbc, confirming to rdso specification no. rdso/pe/spec/ac/0184-2015 (rev.-i) or latest [ warranty period: 30 months after the date of delivery ] ] , voltmeter nw 72, 0-1000 v ac, with accuracy class-1 conforming to is:1248/83 pt. ii similar to sr-72 type of m/s. yokins or similar models of m/ s. ae / muller + zeigler/rishabh /l&t makes as per bom of rdso specification no. rdso/pe/spec/ac/0184- 2015 [rev.1]. the meter shall be supplied along w ith calibration certificate from the manufacturer traceable to nabl standards [ warranty period: 30 months after the date of delivery ] ]