 The default setting for K3, gain for input X3,
equals one (1). In order to avoid problem, set the value for K3 to zero (0). Use the Programming Unit model PU-2A for setting.
With 4-20 mAdc input, 100-ohm internal resistor is attached to each set
of input terminals. If the K3 is set to one (1),
the term "K3 (X3 + A3)"
will be calculated in spite that there is no input X3:
the JFK unit will calculate as if -25% input (0 mA for 4-20 mA span) is
received.
With 1-5 Vdc input, input impedance is very high (greater than 1 M ohms).
It is recommended to shortcircuit across these open terminals in order to
prevent electrostatic induction. |
When one of the three input terminals (ex X3) is
open because this input is reserved for future expansion system, will there
be any problem? What I have to do? 
