If there is no display when powering on, check whether the power supply is properly connected and whether the fuse is blown. Replace the fuse under the cover of the power socket fuse holder; the standard fuse rating is 3A.
On-site Transformer Error Tester If the device freezes, displays a distorted screen, or a blank screen at any time, or if the user wants to interrupt the measurement process, press the "Reset" button and wait.
During printing, if you want to stop printing, press the reset button several times until the printer stops; if you want to print again, you must turn off the instrument power and restart it, otherwise pressing "Print" may cause a freeze.
If during measurement, "Measurement Complete" appears but the data does not change, or "*****" appears, reset and then re-measure.
If the instrument does not respond for a long time during measurement, reset, turn off the power, restart, and then measure again.
When entering the measurement page, if the bottom right corner does not show "Measuring..." but shows "****", it indicates that the time spent before entering the measurement page was very short, and the program did not have time to initialize, so it cannot respond to the page information for measurement. You must restart the instrument and then slowly enter the measurement page to measure.
