Recommendation; Energy Save Effectiveness - Ricoh D127 Field Service Manual

7. Energy Saving
The time can be set from 10 seconds to 240 minutes, using the number keys.
Sleep Mode Timer may not work when error messages appear.
Depending on which Embedded Software Architecture application is installed on it, the machine might
take longer than indicated to enter Sleep Mode.

Recommendation

We recommend that the default settings should be kept.
• If the customer requests that these settings should be changed, please explain that their energy
costs could increase, and that they should consider the effects on the environment of extra energy
use.
• If it is necessary to change the settings, please try a shorter setting first, such as 30 min., then go to
a longer one (such as 60 min.) if the customer is not satisfied.
• If the timer is set to the maximum value, the machine will not begin saving energy until 240 minutes
has expired after the last job. This means that after the customer has finished using the machine for
the day, energy will be consumed that could otherwise be saved.
• If you change the settings, the energy consumed can be measured using SP8941, as explained
below.

Energy Save Effectiveness

SP 8941 (Machine Status) keeps a record of the amount of time that the machine spends in each mode.
• 8941-001: Operation mode
• 8941-002: Ready mode
• 8941-005: Sleep mode
With this data, and the power consumption values from the specifications, we can estimate the amount
of energy that is used by the machine.
This should only be used as a reference value, because the power consumption specifications are
measured in a controlled environment with a constant power supply.
To get an exact measurement at the customers site, a watt meter must be used to measure the actual
energy consumed.
To use SP8941 to calculate the energy consumed:
• At the start of the measurement period, read the values of SP8941 001 002 005.
• At the end of the measurement period, read the values of SP8941 001 002 005 again.
• Find the amount of time spent in each mode (subtract the earlier measurement from the later
measurement).
• Multiply this by the power consumption spec for each mode.
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