The learned paṇḍita wanted to scrutinizingly test the transcendental feats of Lord Caitanya because often unscrupulous devotees imitate physical feats in order to flaunt transcendental achievements just to attract innocent people and take advantage of them. A learned scholar like the Bhaṭṭācārya can detect such imposters, and when he finds them out he at once rejects them.
In the case of Lord Caitanya Mahāprabhu, the Bhaṭṭācārya tested all the symptoms in the light of the śāstras. He tested as a scientist, not as a foolish sentimentalist. He observed the movement of the stomach, the beating of the heart and the breathing of the nostrils. He also felt the pulse of the Lord and saw that all His bodily activities were in complete suspension. When he put a small cotton swab before the nostrils, he found that there was a slight breathing as the fine fibers of cotton moved slightly. Thus he came to know that the Lord's unconscious trance was genuine, and he began to treat Him in the prescribed fashion.