Division II Workstations: Below is a sample PTEC calculation for a Workstation with two hard drives.

Measure values using the Appendix A test procedure.

• Off = 2 W

• Sleep = 4 W

• Idle = 80 W

• Max Power = 180 W

Note number of Hard Drives installed.

• Two hard drives installed during test.

Apply Weightings based on Table 4 to calculate P_TEC:

• Table 4:

  Toff	35 %
  Tsleep	10 %
  Tidle	55 %

• $$P_{\mathrm{TEC}}=\left(\mathrm{0.35}·P_{\mathrm{off}}+\mathrm{0.10}·P_{\mathrm{sleep}}+\mathrm{0.55}·P_{\mathrm{idle}}\right)$$
• $$=\left(\mathrm{0.35}·2+\mathrm{0.10}·4+\mathrm{0.55}·80\right)$$

• = 45.10 W

Calculate the PTEC requirement using the formula in Table 3.

• $$P_{\mathrm{TEC}}=\mathrm{0.28}·\left[P_{\max }+\left(\mathrm{\#\; HDD}·5\right)\right]$$
• $$P_{\mathrm{TEC}}=\mathrm{0.28}·\left[180+\left(2·5\right)\right]$$

• P_TEC = 53.2

Compare the adjusted P_TEC to the ENERGY STAR levels to determine if the model qualifies.

• 45.10 < 53.2

Workstation meets the ENERGY STAR requirements.