Minebea Intec PR 6211 Compact Compression Load Cell 30kg-300kg

Welding near the load cells
-All electrical welding at the measuring facility must be finished before mounting the load cells. Directly when installing the load cell, by- pass the load cell with the flexible copper strap of at least 6mm2 provided for this purpose (Fig. 8), to prevent welding or lightning stroke current from passing through the load cell and damaging it.

 Flexible copper strap
In case electrical welding is required in the vicinity of the load cell, disconnect the load cell cable from the measuring instrument, by-pass the load cell carefully with the abovementioned flexible copper strap. Take care that the grounding clamp of the welding set is fitted as closely as possible to the welding joint in order to prevent a current flow through the load cell.

- Do not lift the load cell by its cable.
- Avoid shock stress (dropping, hard impacts).
- The contact surface for the load cell in the lower mounting plate must be clean, i.e. exempt of sand grains, material rests, etc.
The load cell must be installed in such a way that the direction of load introduction is as close as possible to the vertical direction.
Temperature variations > 15 K/h may affect the measuring accuracy. To protect the load cells against direct heating or cooling effects (sun, wind, heat radiation), suitable shields or heat protection housings must be installed.

To prevent vertical force shunts, all mechanical connections of the object to be weighed to its surrounding construction (pipes, cables, bellows etc.) must be coupled as flexibly as possible.

HINTS FOR CONNECTION
- Protect the cable ends against contamination.
- No moisture must penetrate into the open cable end.
- Do not shorten the load cell cable. Connect the prepared cable end and roll up the remaining cable.
- The cable screening should not be in contact with earth, except at the connecting terminal in the measuring instrument.
- The load cell cabling should be kept away from power circuits.
- The distance between the measuring cables and the power supply cables should be at least 1m
- The load cell cables should be laid in separate cable conduits or steel pipes
- Power supply cables should be crossed at right angles