DMM should be placed in the series combination with the circuit.
Explanation:
DMM is the digital multi meter. It can measure the voltage, current and resistance at a time.
While measuring the current with the DMM you must be ensure that the DMM should be connected with the circuit in series combination. So that it will give the resultant current accurately.
While measuring the voltage the observer should check the open probes.
Check this website out for more information about the space shuttle: https://www.nasa.gov/audience/forstudents/k-4/stories/nasa-knows/what-is-the-space-shuttle-k4.html
