Weidmuller DPAMAS - Universal glavanically isolated signal converter - Handbuch (Seite 23)


InternalAdjustments(Inputbalancing)
This control allows for component
tolerances that would otherwise give
unequal outputs with both inputs at 4 mA
and with both inputs at 0 mA.
1. Remove the electronics from the case
and connect up as shown above.
. Set up two multimeters to measure the
voltages across terminals 4 &  and
terminals 4 & .
. With both milliamp sources at 4.00 mA,
adjust the VR1 on the personality card
until both voltages are equal.
4. Repeat the adjustment with both milliamp sources at 0.00 mA.
. Repeat  & 4 until no further improvements can be made.
3 + –
DPA/MAS
2 4
DC mA
source
+ –
B
DC mA
source
A
14
7
VR1
. . . . . . . .