Indian Standard : specification for AC electricity meters - part 7 volt-ampere-hour-meters for full power factor range  section 1 general requirements 

 - New Delhi  Bureau of Indian Standards  1998 
 - 2p.  
<br/><br/> IS : 722 (Part 7/ Sec 2) - 1987 
<br/><br/><label>Subjects--Topical Terms: </label><br/>AC electricity meter<br/>Indian Standard