Type R and Type S Thermocouple Standards - Models 5649 and 5650 - Fluke Calibration Instruments - Hart Scientific - #1

Hot 6.35 mm (0.25 in) diameter; see

Junction Ordering Information for lengths

Made from the finest platinum and plati­num-rhodium alloy, the Type R and Type S Thermocouples cover a temperature range of 0 °C to 1450 °C with uncertain­ties as good as 0.15 °C over most of that range. With four different models for each type,wehavethethermocoupletofityour application.

The measuring junction of both the 5649 and the 5650 is encased in a 0.25-inch (6.35 mm) alumina sheath that can be ordered in lengths of 20 or 25 inches (50.8 or 63.5 cm) to fit the specific re­quirements of your application. A refer­ence, or "cold," junction may also be ordered. The reference junction uses a stainless steel sheath and is 8.25 inches long (21 cm) by 0.188 inches in diameter (4.8 mm). The thin diameter minimizes the immersion depth needed, but the extra length ensures you can get all the immersion you like.

Special tin-plated, solid-copper con­necting wires with ultra-low EMf proper­ties are used to help retain the integrity of your measurement junction where the probe attaches to your micro voltmeter or Hart Black Stack.

Each probe comes from a spool of wire that has been sample tested using fixed-point standards to ensure uncertainties less than 0.5 °C up to 1100 °C. From 1100 °C to 1450 °C, the uncertainty increases linearly to 3.0°C. If you need greater accu­racy, order an individual calibration with fixed-point standards to reduce uncertain­ties to ± 0.15 °C up to 962°C, ± 0.25 °C up to 1100 °C, and increasing linearly to ±2.0°Cat 1450 °C.

The probe assembly can be easily dis­assembled for performing your own bare-wire calibrations.

5649-20-X Type R TC, 508 mm (20 in) 5649-20CX Type R TC, 508 mm (20 in),

with reference junction 5649-25-X Type R TC, 635 mm (25 in) 5649-25CX Type R TC, 635 mm (25 in),

with reference junction 5650-20-X Type S TC, 508 mm (20 in) 5650-20CX Type S TC, 508 mm (20 in),

with reference junction

5650-25-X Type S TC, 635 mm (25 in) 5650-25CX Type S TC, 635 mm (25 in),

with reference junction X = termination. Specify "B" (bare wire), "W" (ge­neric copper-to-copper TC connector), "R" (standard Type R/S TC connector), or "T" (INFO-CON for 1523 and 1524). Models with reference junctions should not specify "R" and models without reference junc­tions should not specify "W".

1918-B Four-point calibration by fixed point(Sn,Zn, AI,Ag).Extrapo-latedto 1450 °C.

Spare Case (for 635 mm [25 in] long TC)