Instron 1000KPX-J3, Руководство по концепции системы

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Replacement or repair of load cells
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Inspect/replace 59 Series power entry module fuses
The 59 Series power entry module fuses are located in the power entry module on the rear of the
59 Series control unit. Perform the following procedure to inspect or replace the fuses.
Equipment required
No equipment is required, although it may be helpful to have a flat screwdriver to remove the fuse holder.
Recommended procedure
1. Be sure the system is shut down. All power should be off.
2. Depress the tab of the fuse holder (see Figure 22 ) and remove it from the power entry module.
3. Inspect or change fuses as necessary. Fuse specifications are listed in Table 10 .
4. Once work is complete, replace the fuse holder.
Replacement or repair of load cells
Instron load cells, in general, are electrically calibrated, self-identifying and rationalized. Approximate
resistances can be provided to allow confirmation of a possible broken gauge, or a faulty connector or
cable.
If a strain gauge in a cell has been badly overstressed, but still maintains its electrical continuity, the cell
may show a higher than normal amount of creep. If a gauge has become improperly bonded due to
degradation in use, the cell may exhibit a combination of general instability in its balance point, together
with a large amount of creep. Difficulties of this sort rarely appear as an instability in the calibration of
the cell.
If a load cell has been overloaded, the load-sensitive member may be permanently deformed to the extent
that the proper dimensional alignments inside the cell are no longer maintained. If you suspect that a cell
may be damaged, contact your local Instron Services department as directed on page
14 to arrange
returning the load cell for analysis and possible repair.
Figure 22. 59 Series power entry module fuses.
Power entry module
Fuse holder