Add On Board for CX101 & CX102 series Digital Panel Meters

How to use the add-on board:
We have also developed an easy-to-use add-on board, which has all the precision voltage divider resistors mounted.

1. The add-on board is used to expand the measuring range from ±200mV DC to ±20V, ±200V, ±500V DC.

2. Desolder the selection joint 200mV (soldered in factory). Make the measuring range selection by soldering the selection joints 20V, 200V, or 500V and also select the decimal point by shortcircuiting the points marked DP1, DP2 or DP3 to Pin 1 (CX101).

Max measuring range	Selection joint soldered	Decimal point selection
0-20V	20V	DP2
0-200V	200V	DP1
0-500V	500V	no shortcircuit to Pin 3

3. Connect an independent 9V voltage to V+ and V- of the add-on board and connect both ends of the voltage to be measured to Vin and GND on the board.

4. Insert the pins on the back side of CX101 into the socket of the add-on board, pin by pin, 13 pin socket, pay attention to polarity.

5. The miniature digital panel meter and the add-on board are ready to use.