IS 10639 : 1983 Disappearing filament type optical pyrometers

1 Scope

1.1 This standard specifies the requirements of the opticalpyrometers of disappearing filament type.

2 References

IS 2 :1960Rules for rounding off numerical values

IS 1248 :1968Specification for direct acting electricalindicating instruments

IS 1885 : Part 49 :1978 Electrotechnical vocabulary:Part 49 Industrial process measurement andcontrol