Testing And Calibration - Fluke DATAPAQ XDL12 User Manual

If providing your own connecting cables, make every effort to ensure that
all cables and terminating plugs are from the same manufacturer.
The XDL12 will accept sub-miniature thermocouple plugs, but for highest
accuracy standard plugs are recommended.
Use high-quality extension cables and compensating cables from
the logger to the external furnace connection, preferably from the same
batch.
If using type-R or type-S noble-metal thermocouples, compensation cable
can be used, but only noble-metal wire will ensure full accuracy. This
is particularly important if significant temperature variation may occur down
the length of the cable.
When using mineral-insulated thermocouples in a vacuum furnace at
relatively high temperatures, ensure that the diameter of the cable is big
enough to avoid breakdown of the magnesium oxide insulation but small
enough to allow the cable to be bent around the test jig. These
requirements are generally met by 2-mm diameter, type-N, mineral-
insulated thermocouples.
Minimize the number of plug and socket or other connections in
the extension cables or compensating cables. In vacuum furnaces and
autoclaves it is not possible to avoid such connections, but always check the
condition of the sockets on the inner wall of the furnace, and clean with a
small-diameter wire brush if oxidized.
Replace any of the connections on the inner or outer walls of the
furnace if in poor condition or where the connection seems loose.

Testing and Calibration

It is recommended that the logger is tested and calibrated by Datapaq at least
once a year. To comply with the AMS 2750D standard, loggers should be
calibrated every three months. The Datapaq calibration procedure comprises:
Inspection of the logger, externally and internally.
Battery- and charge-testing.
Stability testing, using a stable temperature source and varying ambient
temperatures.
Calibration and updating of the logger's firmware.
Issue of certificate, which can be traced back to national calibration
standards.
No other company can offer this degree of in-depth testing as well as a full
calibration service. To calibrate your logger, please return it to the Service
Department at Datapaq (see title page for contact details).
DATAPAQ XDL12
Specifications and Operation
17