a. Find the point corresponding to the frequency of the applied voltage on the horizontal scale marked "cycles per
second.”
b. Trace upwards from that point until you strike the curve corresponding to the range on which you are
measuring.
c. Trace along the horizontal line from that point until you strike the vertical scale marked "correction factor."
d. Multiply the voltage indicated on the meter by the correction factor obtained from the graph to find the true
voltage.
DB Measurement
The instructions for db measurement are the same as those for AC voltage measurement, except for the reading of the
meter scales.
When using the 2. 5 volt position, the DB scale is read directly; for all other ranges it will be necessary to algebraically
add the number of db charted on the right hand side of the meter face. For example, if the RANGE selector switch is set
at 250 volts and the meter indicates + 1DB, the actual reading would be 40 + 1 = 41db. As a further example, if the
meter in the 10 volt position reads -8DB, the actual reading would be -8 + 12 = 4db.
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