Ricoh MD-P2 Field Service Manual page 225

Energy Save Effectiveness
SP 8941 (Machine Status) keeps a record of the amount of time that the machine spends in each mode.
• 8941-001: Operating time
• 8941-002: Standby time
• 8941-003: Energy save time (Panel Off)
• 8941-004: Low power time (Not used in this model)
• 8941-005: Off mode time (Off/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:
1. At the start of the measurement period, read the values of SP8941 001 to 005.
2. At the end of the measurement period, read the values of SP8941 001 to 005 again.
3. Find the amount of time spent in each mode (subtract the earlier measurement from the later
measurement).
4. Multiply this by the power consumption spec for each mode and convert the result to kWh (kilowatt
hours)
Machine Status
Operating Mode
Ready mode (Stand-by)
Energy Saver Mode
(Panel Off)
Off/Sleep Mode
5. This is a simulated value for power consumed.
Here is an example calculation.
Power Consumption of MD-P2
525 W
62 W
42 W
4.5 W
Energy Save
7
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