Ricoh SH-P1 M020 Field Service Manual page 285

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 to 005.
• At the end of the measurement period, read the values of SP8941 001 to 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.
• Convert the result to kWh (kilowatt hours)
Here is an example calculation.
Machine SP8941:
Condition Machine
Status
Operating 001:
Operatin
g Time
Stand by 002:
Standby
(Ready)
Time
Sleep 005: Off
Mode
Time
Total
Time at Time at End
Start (min.) (min.)
21089.0 21386.0
306163.0 308046.0
508776.0 520377.0
Running Power
time consumption
(hour) Spec. (W)
( - )/
60 =
4.95 898
31.38 179
193.35 1.8
Energy Save
Power
consumption
(KWH)
7
( x )/1000
=
4.45
5.62
0.35
10.42
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