Epson 9840 - Manual (Page 59)

I N T E R F AC E M O D E L 9 8 4 0 V E R 6 . 0 . 2
Precision Shunt Calibration Resistors
This diagram shows the connection of the precision internal shunt resistors.
The back panel switch (shown to the left of the two resistors) selects between 30 K
Ω
and 60 K
Ω.
The shunt check relay (shown to the right of the two resistors) connects the selected
resistor between the Excite High and the Cell Output High.
30 K
Ω
60 K
Ω
Cell Output High
Sense High
Excite High
Excite Low
Sense Low
Cell Output Low
LOAD
CELL
M O D E L 9 8 4 0 P G 5 8 P U B . 2 8 5 6 - 1 6