[Electric engineering.] . , andany roughness detected by rubbing it over the finger found rough, a new shaft end should be put in. A dropof good clock oil may be put on the jewel, except when themeter is in a dusty place. Sometimes the armature circuitsof meters become broken, in which case the meter will notcome up to speed even with the magnets swung in as far asthey will go. Again, if the meter cannot be brought downto the proper speed, the magnets may be too weak or theremay be a short circuit in the resistance in the back of themeter, thus letting too much current through the arma
[Electric engineering.] . , andany roughness detected by rubbing it over the finger found rough, a new shaft end should be put in. A dropof good clock oil may be put on the jewel, except when themeter is in a dusty place. Sometimes the armature circuitsof meters become broken, in which case the meter will notcome up to speed even with the magnets swung in as far asthey will go. Again, if the meter cannot be brought downto the proper speed, the magnets may be too weak or theremay be a short circuit in the resistance in the back of themeter, thus letting too much current through the armature. 119. Reading1 Meters.—Reading meters is considereda difficult task by many, but once the dials are thoroughlyunderstood there should be no trouble in reading dials on a recording wattmeter bear a considerableresemblance to those on a gas meter. The arrangementdiffers somewhat with different makes, but if one is able toread the Thomson meter correctly, there should be littledifficulty with the ni /,000. OOO /OO, OOO /O, oo o *9 1 «
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