GUIDE TO PURCHASE,
INSPECT AND MAINTAIN DIGITAL MEASURING INSTRUMENTS

1) “Fixed digits” ---- resulting from accidental trouble in circuit, accompanied by display of some irrelative signs.

Solution: Take out the battery and put it back after over 30 seconds. It’ll become normal after several trials.

2) Flashing digits---- resulting from low electric voltage. To get it solved, you need to replace the battery as soon as possible.

3) Figures displayed in disorder-----resulting from its unstable display. It results from the wet protective sticker. To get it solved, please refer to the above-mentioned operating instructions.

4) Mechanical abrasion:

The method of repair is about the same as that of a vernier caliper’s. But see to it that it must avoid forceful striking. And its striking should be done after the electronic parts are taking apart. Repair can also be done for more times than before not only because “Zero” can be set at any position but also because it’s not limited by zero- error of vernier calipers. It’s worth great noticing that repair is becoming more and more difficult due to the fact that the left end of an ordinary four-way digital caliper acts as the step measuring face and that the end of inside jaws are hard and crisp. At clients’ request, we can solve that problem using anti-jaw-broken technique which is one of the patents of Guanglu.. Guanglu also suggests the maintenance of all digital calipers made by different manufacturers in China free of charge. And the replacement of parts will be charged reasonably. Domestic clients are welcome to enjoy that service.