Table 2 lists the purity of the fixed-point substances, the container and holder materials, the amount of sample used, the immersion depth of the SPRTs in the thermometer well of the sample container, the controlled operating environment, and the uncertainties associated with the measurements using the fixed-point devices.
The depth of the thermometer well of the container for the high-purity fixed-point substance is limited.
The check (HT)SPRT is removed and two cold silica-glass rods are successively inserted into the thermometer well for about 5 min each to form a thin layer of solid metal around the thermometer well.
Next, a long heater is inserted into the thermometer well to form an inner melt.
The generic sealed cell consists of a permanently sealed pressure vessel with a ballast volume; a sample volume for the condensed portion of the sample; a thermometer well insert; a heat exchanger; and a heating element.
The thermometer well inserts are large enough to accommodate three capsule-type thermometers, either CSPRTs or RIRTs.
The OFHC Cu block contains six thermometer wells, one at the top of the block, four at mid-height, and one at the bottom.
3] copper sample cell, containing 15 mol of Ar, into which seven long, thin-wall stainless steel thermometer wells were inserted and soldered.