diff --git a/docs/about.md b/docs/about.md index 4cfaad4..1646f3c 100644 --- a/docs/about.md +++ b/docs/about.md @@ -25,11 +25,11 @@ The O-ESD is powered up (or down) using the toggle switch located on the grip. T Once the O-ESD is powered-up the splash screen should appear for 1 s at the LCD. Afterwards, the main screen of the O-ESD shows up. LCD has four 20-character lines. Each line stands for one item. Items (i.e., lines) are selected by moving the selector “ > ” using up/down buttons.
If an item has a numeric value selectable by the user, the numeric value can be changed by rotating the knob. Some items have multiple choices (selections) or submenus (sub-items) available and those are accessible by pressing the knob.
![UI](img_UI.png)

-There are two modes of operation - * contact discharge and - * air discharge. +There are two modes of operation
+(A) contact discharge
+(B) air discharge.

The default mode is the contact discharge. The sharp conductive tip (electrode) is used for contact discharge and should be placed in the red socket at O-ESD output. For air discharge the rounded conductive tip (electrode) is used and it should be placed in the black socket. O-ESD is intended for use with only one conductive tip (electrode) inserted at a time and with the appropriate mode of operation selected.
-Screen (menu) has four items.
+
Screen (menu) has four items.
(1) The first (top) item on LCD is the battery status. It displays the minimum of relative voltages of the two batteries. If the voltage of a battery drops below 3.5 V, the battery status displays that recharge is needed. Note that O-ESD will work even with very low battery voltage that may irreparably damage the batteries. Battery status has a submenu that presents extended information about each battery.
![Battery_extended](img_bat_ex.png)
(2) The second item is the operation mode. It can be either contact or air as selected by the used.