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BSIL-T2-1.1 Instruction Manual
Cable Welding Lengthening
3.
A standard CGEO-TEM2 model temperature gauge equips with 1m cable in ex-factory,
cable model is CGEO-4-SCT. For cable lengthening adopted is CGEO-4-SCT dedicated cable,
and BSIL-4-SC cable as well as. Proceed lengthening basing on the field circumstance before
installation. Avoid connection as possible as in the cable buried in soil. If cable connection is
inevitable, should adopt waterproof connection, recommend using ES-3 model dedicated
heat-shrinkable connector, and also epoxy connector, like 3M ScotchcastTM 82-A1 dedicated
cable connector, those connector devices can be ordered from Beijing SOIL.
As following details introduction of connection method of using ES-3 model dedicated
heat-shrinkable connector.
Measure the resistance between cores of transducer with millimeter and note it before
welding. Thereinto, the resistance between green and white core should be 3k at room
temperature 25℃. As to CGEO-TEM2 model temperature gauge, the resistance between red
and black core leads is the same as green and white.
Before welding divest the outer leather of cable end part, length about 8cm, and expose
the core leads, roughen rest cable outer leather part with emery cloth or sandpaper, length
about 3 cm. Sleeve φ12mm heat-shrinkable tube onto outside cable (length about 14cm).
Strip outer skin of cores 0.5~0.8 cm with stripping pliers, jacket φ2mm heat-shrinkable tube
onto core leads. After twisting core leads together corresponding to colors, solder tin with
electric soldering iron. Should avoid poor soldering and remove burrs during soldering
process. 5 pieces of cores all are needed to solder, please note: 1). Stagger each core
connector; 2). Ensure every core lead length same and ensure each core uniformly forced
when cable is pulled. After soldering, naked core line length about 7 cm, push φ2mm outer
heat-shrinkable tube onto core leads connector part, and make it shrunk in connector part with
heat wind gun. At last push φ12mm heat-shrinkable tube unto cable connector and heat-
shrunk in connector part with heat wind gun. φ12mm heat-shrinkable tube should be
pressed 3 cm over each end of cable outer skin. Should control the temperature when using
heat-wind gun so that heat-shrinkable tube internal in transparent, fluid status, and fully filled
with connector internal. But too high temperature will melt core lead outer skin and cause
CGEO INTERNATIONAL LIMITED
2
Installation Manual
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