Petroleum Testing Equipments RAMSBOTTOM CARBON RESIDUE APPARATUS As per ASTM D-524, IP 14 Comprising of Coking furnace with 5 bulb wells, (4 each for cking bulbs and 1 for the control bulb). Temperature is accurately controlled and maintained by fully automatic solid state time proportional digital controller and thermocouple. Power supply 230 V, 1 Phase, 50 Hz.