Denso BHT-7500S User Manual page 103

⇑ ⇓
BS key
ENT key
⇑ ⇓
BS key ENT key
Chapter 2. Getting Started the BHT and System Mode
The fine checker pattern appears.
The fine checker pattern is reversed.
Four right-angled triangles appear.
Press the ENT key, and the BHT beeps once and
returns to the TEST menu.
83