AFS Foundry Sand Testing Equipment Operating Instructions Manual

INSTRUCTIONS FOR THE CORRECT USE OFULTRASONIC CLAY TESTER ACCESSORYFor UK and Continental European Models, connect to a 220-240 VAC fully earthed supply via a 3pin plug. It can be dangerous to operate an ultrasonic bath without an earth connected.Fill the bath to within 30 mm from the top. The unit is designed to operate correctly with at least ¾liquid level. This is important especially with heated models, where the heaters are mounted on thelower bath sides. If the liquid level falls below ½ full the heaters will be damaged, and the warrantywill be void. A lid will prevent liquid loss by evaporation, and reduce fumes from certain cleaningfluids.Do not allow items to come into contact with the base of the bath. Damage will occur to the basedue to the high frequency vibrations and the transducers can be damaged. Suspend the items tobe cleaned, or use a basket , instrument tray or glass beaker. Stainless steel baskets, beakersupport trays and hard glass beakers are available accessories.After filling the bath with warm water and a 2% addition of detergent or recommended cleaning fluid,advance the timer to the required cleaning time. The timer can be set for a maximum of 15 minutes.In practice most items will be cleaned in less than 5 minutes. The unit should be switched off whennot required, this will prolong the transducer life.Gases are present in a first fill with water from the tap. Cavitation, the appearance of “cold-boiling”,will only occur when the gases have been driven out of the solution. The period taken to degas thefluid varies. Generally, less than two minutes will see cavitation taking place. Once the solution isdegassed, the bath is always available for immediate use.14