Division 5.2 Conditions for power measurements

Power measurements:

1. (1)

   Power measurements shall be taken from a point between the power source and the UUT. No Uninterruptible Power Supply (UPS) units may be connected between the power meter and the UUT. The power meter shall remain in place until all On Mode, Sleep Mode and Off Mode power data are fully recorded.

2. (2)

   Power measurements shall be recorded in watts as directly measured (unrounded) values at a rate of greater than or equal to 1 reading per second.

3. (3)

   Power measurements shall be recorded after voltage measurements are stable to within 1 %.

Dark Room Conditions:

1. (1)

   Unless otherwise specified, the illuminance measured at the UUT screen with the UUT in Off Mode shall be less than or equal to 1,0 lux. If the UUT does not have an Off Mode, the illuminance shall be measured at the UUT screen with the UUT's power cord disconnected.

UUT Configuration and Control:

1. (1)

   Peripherals and Network Connections:

   1. (a)

      External peripheral devices (e.g. mouse, keyboard, external hard disk drive (HDD), etc.) shall not be connected to USB ports or other data ports on the UUT.

   2. (b)

      Bridging: If the UUT supports bridging as per the definition in Section 1 of the Energy Star Specification for Displays Version 7.0, a bridge connection shall be made between the UUT and the Host Machine. The connection shall be made in the following order of preference. Only one connection shall be made and the connection shall be maintained for the duration of the test.

      1. (i)

         Thunderbolt;

      2. (ii)

         USB;

      3. (iii)

         Firewire (IEEE 1394);

      4. (iv)

         Other.

      Note: Examples of bridging for Displays may include:

      1. (1)

         A case where the Display converts data between two different port types (e.g. Thunderbolt and Ethernet). This can allow a device to use Thunderbolt as an Ethernet connection or vice versa.

      2. (2)

         Allowing a USB keyboard/mouse to be connected to another system (e.g. Host Machine) through the Display by a USB hub controller.

   3. (c)

      Networking: If the UUT has networking capability (i.e. it has the ability to obtain an IP address when configured and connected to a network) the networking capability shall be activated, and the UUT shall be connected to a live physical network (e.g. WiFi, Ethernet, etc.). The physical network shall support the highest and lowest data speeds of the UUT's network function. An active connection is defined as a live physical connection over the physical layer of the networking protocol. In the case of Ethernet, the connection shall be via a standard Cat 5e or better Ethernet cable to an Ethernet switch or router. In the case of WiFi the device shall be connected and tested in proximity to a wireless access point (AP). The tester shall configure the address layer of the protocol, taking note of the following:

      1. (i)

         Internet Protocol (IP) v4 and IPv6 have neighbour discovery and will generally configure a limited, non-routable connection automatically.

      2. (ii)

         IP can be configured manually or by using Dynamic Host Configuration Protocol (DHCP) with an address in the 192.168.1.x Network Address Translation (NAT) address space if the UUT does not behave normally when autoIP is used. The network shall be configured to support the NAT address space and/or autoIP.

      3. (iii)

         The UUT shall maintain this live connection to the network for the duration of testing unless otherwise specified in this Test Method, disregarding any brief lapses (e.g. when transitioning between link speeds). If the UUT is equipped with multiple network capabilities, only one connection shall be made in the following order of preference:

         1. (a)

            WiFi (Institution of Electrical and Electronics Engineers — IEEE 802.11- 2007^f1);

         2. (b)

            Ethernet (IEEE 802.3). If the UUT supports Energy Efficient Ethernet (IEEE 802.3az-2010^f2), then it shall be connected to a device that also supports IEEE 802.3az;

         3. (c)

            Thunderbolt;

         4. (d)

            USB;

         5. (e)

            Firewire (IEEE 1394);

         6. (f)

            Other.

   4. (d)

      Touchscreen Functionality: If the UUT features a touchscreen that requires a separate data connection, this function shall be set up as directed by the manufacturer's instructions, including connections to the Host Machine and installation of software drivers.

   5. (e)

      In the case of a UUT that has a single connection capable of performing multiple functions (e.g. bridging, networking, and/or touchscreen functionality), a single connector can be used to meet these functionalities provided it is the highest preferred connection the UUT supports for each functionality.

   6. (f)

      In the case of a UUT that has no data/network capabilities, the UUT shall be tested as shipped.

   7. (g)

      Built-in speakers and other product features and functions not specifically addressed by the Energy Star Specification or test method must be configured in the as-shipped power configuration.

   8. (h)

      Availability of other capabilities such as occupancy sensors, flash memory-card/smart-card readers, camera interfaces, PictBridge shall be recorded.

2. (2)

   Signal Interface:

   1. (a)

      If the UUT has multiple signal interfaces, the UUT shall be tested with the first available interface from the list below:

      1. (i)

         Thunderbolt;

      2. (ii)

         DisplayPort;

      3. (iii)

         HDMI;

      4. (iv)

         DVI;

      5. (v)

         VGA;

      6. (vi)

         Other Digital Interface;

      7. (vii)

         Other Analogue Interface.

3. (3)

   Occupancy Sensor: If the UUT has an occupancy sensor, the UUT shall be tested with the occupancy sensor settings in the as-shipped condition. For UUT's with an occupancy sensor enabled as-shipped:

   1. (a)

      A person shall be within close proximity of the occupancy sensor for the entire warm up, stabilisation, luminance testing and On Mode to prevent the UUT from entering a lower power state (e.g. Sleep Mode or Off Mode). The UUT shall remain in On Mode for the duration of the warm up period, stabilisation period, luminance test and On Mode test.

   2. (b)

      No person shall be within close proximity of the occupancy sensor for the duration of the Sleep Mode and Off Mode tests to prevent the UUT from entering a higher power state (e.g. On Mode). The UUT shall remain in Sleep Mode or Off Mode for the duration of the Sleep Mode or Off Mode tests, respectively.

4. (4)

   Orientation: If the UUT can be rotated into vertical and horizontal orientations, it shall be tested in the horizontal orientation, with the longest dimension being parallel to the table surface.

Resolution and Refresh Rate:

1. (1)

   Fixed-pixel Displays:

   1. (a)

      Pixel format shall be set to the native level as specified in the product manual.

   2. (b)

      For non-Cathode Ray Tube (CRT) Displays, refresh rate shall be set to 60 Hz, unless a different default refresh rate is specified in the product manual, in which case the specified default refresh rate shall be used.

   3. (c)

      For CRT Displays, pixel format shall be set to the highest resolution that is designed to be driven at a 75 Hz refresh rate, as specified in the product manual. Typical industry standards for pixel format timing shall be used for testing. Refresh rate shall be set to 75 Hz.

Accuracy of Input Signal Levels: When using analogue interfaces, video inputs shall be within ± 2 % of referenced white and black levels. When using digital interfaces, the source video signal shall not be adjusted for colour, or modified by the tester for any purpose other than to compress/inflate and encode/decode for transmission, as required.

True Power Factor: Programme participants shall report the true power factor (PF) of the UUT during On Mode measurement. The power factor values shall be recorded at the same rate at which the power value (P_ON) are recorded. The reported power factor shall be averaged over the entire duration of the On Mode testing.

Test Materials:

1. (1)

   ‘IEC 62087:2011 Dynamic Broadcast-Content Signal’ shall be used for testing, as specified in IEC 62087:2011, Section 11.6, ‘On (average) mode testing using dynamic broadcast-content video signal’.

2. (2)

   ‘VESA FPDM2’ shall be used only for products that cannot display the IEC 62087:2011 Dynamic Broadcast-Content Signal.

Video Input Signal:

1. (1)

   The Host Machine shall generate the video input signal in the native resolution of the Display such that the active area of the video fills the entire screen. This may require the playback software to adjust the aspect ratio of the video.

2. (2)

   The frame rate of the video input signal should match the frame rate most commonly used in the region in which the product is sold (e.g. for the US and Japan, a 60 Hz frame rate is used; for Europe and Australia, a 50 Hz frame rate is used).

3. (3)

   The audio settings on the Host Machine shall be disabled so that no sound is produced alongside the video input signal.