The protocols for experiment M071 and M073 incorporated the SMMD to produce raw data pertaining to food residue and fecal weights. Two SMMD's, each with a capacity of one kilogram, were used for these measurements. One was used for the food wrappers and the other was used for the fecal samples and vomitus. The procedure for weighing residual food called for the wrapper or container to be measured with the residual food inside. These weights were later compared to preflight weights for the food samples to determine the amount of nutrients remaining in the wrapper or the container. The procedure for weighing fecal and vomitus samples involved collecting the specimen in a plastic bag and then weighing it. After weighing, the samples were placed in a drying oven before being stored.
The sample measured had to be securely fastened to the device because of the sensitivity of the device to external movement. A perforated elastic sheet held the specimen in place during operation. For the food samples, the SMMD readout (period of oscillations) was recorded and voice transmitted to Earth where mass was calculated and then transmitted back to the crew. For the vomitus and fecal samples, an on-board graphic conversion was used to convert the SMMD readout to mass, which allowed for proper setting of the fecal drying timers. All samples returned to Earth for analysis included records of oscillation periods.
The SMMD proved to be an instrument worthy of measuring food residue and fecal weights.