This voltage reference is used in a precision balance I tore down just the other day. The resistor that attaches to it is a 15.00k Ohm, 0.5%, 50ppm/K
Pay close attention to the ground plane "tongue" dips under the resistors. The ordinary 10 ohm resistor right next to it feeds the heating element for the can.
Perhaps the 10 ohm resistor is meant to be a heating element as well to warm up the trace beneath it so the entire cluster remains at the same temperature? The best way to avoid EMF voltage generation aside from using exotic matching is to have the affected components all be at the same temperature.
The six banded resistor then connects to ground through the shunt resistors on stand-offs which are 0.1%.
The permissible voltage variation span is fairly wide. 6.8 to 7.1v. For this scale, it doesn't really matter what the exact voltage is, because the offset adjustment is made with a calibration. What matters is that it STAYS where it is, whatever that value may be.
