That's not really a voltage source. The LM4040 is a series of precision shunt references. Think of it as an ultra-precise low tempco zener diode. You need to choose the series resistor to keep the shunt current within the specified range. Too high and it'll fry. Too low and it will probably oscillate - a sawtooth riding on the approximate specified reference voltage.
Checking the DC accuracy of your meter and 'scope is is a good use. It's also useful as a reference for a comparator (e.g. in a window detector to check whether a power supply output is in spec.
Power Supplies should be boring: No loud noises, no bright flashes, and no bad smells.
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