BSIL-T2-1.1 Instruction Manual
CGEO INTERNATIONAL LIMITED
Installation Manual
5
7.
Trouble Shooting
When troubles occur, a millimeter is usually used to check core wire resistance and examine
the breakdown phenomena.
When checking, connect the digital millimeter to the cores of the transducer, the normal
condition is that the resistance matches the environment temperature (check Appendix A). In
25
C, the resistance should be 3000Ω. If the resistance deviates from the norms, it is caused
normally by cable open or short, should focus on inspecting the cable for damage.
If the cable is damaged or affected with damp, the reading will be fuzzy, a bit bigger than the
correct reading. What should be noticed is that, if the cable is too long and under the
high-temperature environment, the resistance of cable core should be taken into consideration
during calculating, to gain a higher precision. This resistance will not be taken into
consideration under low-temperature environment. The resistance of matched cable core is
about 50Ω/1000m, and doubled when in two-direction.
Appendix A: Resistance versus Temperature Table
