NEC NP-PX800X User Manual - Page 48

3. Convenient Features Checking Energy-Saving Effect [CARBON METER] This feature will show energy-saving effect in terms of CO2 emission reduction (kg) when the projector's [ECO MODE] is set to [OFF], or [ON]. This feature is called as [CARBON METER]. There are two messages: [TOTAL CARBON SAVINGS] and [CARBON SAVINGS-SESSION]. The [TOTAL CARBON SAVINGS] message shows the total amount of CO2 emission reduction from the time of shipment up to now. You can check the information on [USAGE TIME] from [INFO.] of the menu. (→ page 125) The [CARBON SAVINGS-SESSION] message shows the amount of CO2 emission reduction between the time of changing to ECO MODE immediately after the time of power-on and the time of power-off. The [CARBON SAVINGSSESSION] message will be displayed in the [POWER OFF/ ARE YOU SURE ?] message at the time of power-off. TIP: • The formula as shown below is used to calculate the amount of CO2 emission reduction. Amount of CO2 emission reduction = (Power consumption in OFF for ECO MODE − Power consumption in ON for ECO MODE) × CO2 conversion factor.* When the image is turned off, the amount of CO2 emission reduction will also increase. *  Calculation for amount of CO2 emission reduction is based on an OECD publication "CO2 Emissions from Fuel Combustion, 2008 Edition". • The [TOTAL CARBON SAVINGS] is calculated based on savings recorded in 15 minutes intervals. • This formula will not apply to the power consumption which is not affected by whether [ECO MODE] is turned on or off. 34