1. About Calibration
Ensuring samples are properly calibrated is critical, as improper calibration will affect the accuracy of the
measurement. Calibration, CALSTD, is a pre-configured calibration performed at the time of shipment with 3
standard samples (EPS, Acrylic, TEMAPX glass). The calibration data of CALSTD cannot be modified by the end
user and is password protected. If the calibration data of CALSTD needs to be modified, please contact your EKO
Instrument representative.
Calibration, CALSTD is useful for checking the deterioration of the sensor. Periodically using CALSTD, you can
check to see if there is any deterioration of the sensor. This is done by measuring the thermal conductivity of the
standard sample and comparing this value to the displayed thermal conductivity.
Additionally, if you cannot prepare samples for calibration, it is possible to measure the thermal conductivity of a
homogeneous sample in the thermal conductivity range of 0.03 to 1.0 [W/m・K] by using CALSTD.
When measuring non-homogeneous samples like a Vacuum Insulated Panel (VIP), to measure the thermal
conductivity in a narrow range with the same material, samples for calibration need to be prepared. 3 to 4 samples
with different thermal conductivity are required, for the calibration. Up to 19 calibrations can be stored on the
device; CAL001 to CAL019. When a PC is used, there is no limit to the number of calibrations.
2. Preparation of calibration sample (example of VIP)
When measuring a Vacuum Insulation Panel (VIP), calibration CALSTD of standard sample cannot be used.
VIP is a non-homogeneous material with a very low thermal conductivity. To measure VIP, it is necessary to
prepare 3 to 4 proof plates (user samples) of VIP of the same shape and different thermal conductivity. The
thermal conductivity of the VIP samples must be accurately measured by another thermal conductivity measuring
device.
3. Calibration Operation
1) Menu selection (move with ▲ ▼ buttons, select Enter or Select) select Calibration.