5.1.6 Near End (Black-Belt) DetectionService personnel can adjust the sensitivity to detect a near end (black-belt) with apotentiometer.. PC board name: NESE-12Measurement points: TPl and GND. Specifications: . 3.8 V If 0.1 V (at 25’C) when set the black-color sheet. Less than 1.3 V (10°C to 35°C) when set the white-colorsheet.. Control: RVl (potentiometer). Required tool: Digital voltmeter1) Measurementa) Connect the leads of the digital voltmeter between TPl test point andGround (FG). (See Figure 5.1.7 at next page.)b) Turn on the AC power switch.d .d)Set a black-color sheet on the near-end window.Use the RVl potentiometer on the NESE-12 to adjust the TPl voltage asbelow:TPl VoltageWI4.OV?rO.l v3.8VtO.l V3.6VkO.l VTemperature“C1oto2O”c21 to 30°C3 1 to 35°CSet a white-color sheet on the near-end window.Make sure that the TPl voltage is less than 1.3 V.5- 10
