1 ENJECT ETHANOL OR ACETONE ABOUT 25mm TO THE DEW-POINT METER CONTAINER, THEN PUT IN DRY ICE TO REFRIGERATE AND KEEP THE CENTIGRADE UP TO OR LOWER THAN -40℃.
1 ENJECT ETHANOL OR ACETONE ABOUT 25mm TO THE DEW-POINT METER CONTAINER, THEN PUT IN DRY ICE TO REFRIGERATE AND KEEP THE CENTIGRADE UP TO OR LOWER THAN -40℃.
2将试样水平放置，在上面涂一层乙醇或丙酮。使露点仪与该表面紧密接触，停留时间按表4的规定。