1314-900 Revision BA
250W Precision Calorimeter
23
Manual RF Calibration Procedure
Configure the equipment as shown in Figure 4.16. Set the 1314 to read RF power by pressing the
AC/RF soft key on the front panel display to RF. After confirming fluid is flowing properly in the
calorimeter and the correct chiller set point has been entered, slowly apply RF power monitoring
the total output power as read by the externally supplied RF power meter standard serving as the
DUT. When the desired calibration power level has been reached, continue to keep the power
constant and allow the calorimeter to settle for >~6 minutes and then read the RF value in the
front panel display. Repeat this process for as many power level points as desired for testing. The
power levels desired do not need to necessarily match the calibrated AC power levels as the
internal software to the 1314 will use the piecewise linear approximations derived from the
calibration.ini file to interpolate between points if needed. When finished, shut off the RF source
power to the input of the calorimeter and allow the coolant fluid to continue flowing through the
load for a minimum of >3 minutes before shutting down the chiller supplying the coolant flow.
The resulting power value differences obtained between the DUT and the calorimeter can now be
used to adjust or correct the DUT readings resulting in a calibrated DUT device.
Figure 18: Manual RF Calibration Set-up
