Ambient temperature observations

AMBIENT temperature according to rule 2300 of the A. I. E. E. Standards, “is to be measured by means of several thermometers placed at different points around and half way up the machine at a distance of one to two meters or three to six feet.” “The value to be adopted for the ambient temperature during a test, is the mean of the readings of the thermometers (placed as above) taken at equal intervals of time during the last quarter of the duration of the test.”