La Crosse Technology 3362 - Manual (Page 14)

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Example 1:
A lamp is plugged into the Cost Control and operated
every evening:
Day 1 from 6:00p.m. to 8:00p.m.
Day 2 from 7:00p.m. to 9:00p.m.
Day 3 from 6:30p.m. to 8:30p.m.
Assume it costs $1.00 per hour to run this lamp, the
Total Cost at 8:00p.m. on day one would be $2.00. If
Total Cost per day is required then it will show $24.00,
at this point the Cost Control is assuming the lamp will
be left on all day for 24 hours, but this is not the case.
At 6:59p.m. on day 2, the Cost Control will show the
Total Cost as the same at $24.00 but now the cost per
day would have dropped to about $2.00, as it has not
been used for the last 23 hours. Before the lamp is
turned “ON” on day 3, the Cost Control will have taken
the total power consumption and the length of time that
it has been turned off and averaged them out for an
accurate cost per day reading. This should show $2.00
so you know how much, on average, the lamp is costing
to operate everyday.
Example 2:
Some appliances are constantly turned on and off for
varying amounts of time such as refrigerators, freezers,
TV sets, etc. The power used by each of these
electrical appliances varies greatly due to the time the
motor is switched on and off, in such cases, it is