ISOMET 2114
User
’s Guide
www.appliedp.com
22
4.3.5 Calibration
Supplied measurement probes have good long term stability through the whole measurement range.
Periodic calibration before measurements is not necessary. Nevertheless, calibration by means of a
reference material is supported by the instrument. Calibration coefficient
k
stated in sense of the
standard ASTM
– 5334-08 may be applied to subsequent measurements automatically. In addition, it
is possible to apply an offset value
q
for subsequent measurements.
Calibration page is available by selecting the 6
th
item in the system menu or by pressing the key 6.
Editing the Calibration page is protected by password. The password is 1234. Before entering the
password numeric mode of the keyboard must be selected by pressing the Shift key. After successful
entering the password, edit boxes for entering calibration coefficients or expected (conventionally
true) thermal conductivity values became available. There are two possibilities for the user. It is
possible to enter coefficients
k
and
q
,
calculated according to the standard ASTM 5334-08 or linear
regression,
directly. It is also possible to select measurement result of one or two reference materials
in the database of results and after entering the conventionally true thermal conductivity values of the
reference materials, calculated calibration coefficients are displayed in the edit box. If only one
reference material is used for calibration, the second calibration coefficient
q
must have zero value.
Applying the coefficient must be enabled in the combo box Use correction. For safety reason, the
combo box is not saved. After switching the instrument on, applying calibration coefficient is disabled.
