ATS 2140-M Series, Инструкция по эксплуатации

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SLoad: The test is ready for a load increase.
TCBCal: There is no thermocouple measurement unit calibration found on the system.
THigh: A control thermocouple is above the minor temperature alarm limit.
TLow: A control thermocouple is below the minor temperature alarm limit. See A.3.2 for more
information about this alarm.
ZExt: The extensometer has traveled beyond its specified re-zero range and must be re-zeroed.
A.3.1 FZONE alarm:
Refer to the Furnace Setup menu, under “Zone Power Control,” to find a set of parameters which define
the zone power control limits.
Min and Max usually 10 and 90 percent, mean that of the available power to the furnace, any one zone
should be receiving a minimum of 10%, and no zone should be receiving more than 90%. If the control
algorithm cannot achieve the required control within these limits, the FZONE alarm will be activated,
which indicates a problem with the furnace or specimen arrangement. It does not mean that the test
should be stopped or is invalid. It means that attention is required.
The following problems are associated with the FZone alarm:
1. The problem can be with the hardware; for example, one half of the furnace elements in a zone
may be open.
2. In unusual circumstances, a wiring error in the thermocouple connections or the furnace zone
control relays could result in the thermocouple or zone relay being associated with the wrong
zone. This produces a very distinctive temperature pattern, and a review of a test file will easily
identify this problem. To receive advice through a review of archived test files, call the ATS Service
Department.
3. It may be that one or more of the thermocouples are not properly attached or are not in the
proper location.
4. It may mean that the furnace is not properly closed or that the end caps are not in place.
5. The most common problem is that the specimen is not in the center of the furnace, requiring
the furnace to be adjusted vertically. If the specimen is below the center of the furnace, then
the bottom end of the specimen will not be inside the furnace. This will result in the bottom of
the specimen being even cooler than normal. This makes it much more difficult for the differential
algorithm to function, resulting in the FZone alarm.
NOTE: With a specimen installed and the lever arm positioned correctly, the furnace should be
positioned so that the specimen is vertically centered in the middle zone. This is part of the installation
procedure and should be checked any time a change is made to either specimen or pull rod length.