Using U8480 Series USB Power Sensors 8
N1913A/1914A EPM Series Power Meters User’s Guide User’s Guide 183
Measurement Accuracy
Thermocouple sensors have small errors in their response over frequency.
The response of each sensor is measured during manufacture to determine
correction factors. With the U8480 Series thermocouple sensors, correction
factors are stored in a 3 MB Flash memory and are downloaded to the
power meter automatically.
Using calibration factors enables improved measurement accuracy. This
section describes making average power measurements using the U8480
Series thermocouple sensors.
Making a measurement requires the following steps:
1 Zero the power meter/power sensor combination.
2 Set the frequency for the signal you want to measure.
3 Make the measurement.
Procedure
1 Zero the power meter/thermocouple sensor combination.
2 Ensure the power sensor is disconnected from any signal source.
3 Press and the channel softkey. Select the required channel.
Now, set the frequency of the signal you want to measure. The
thermocouple meter automatically selects the appropriate calibration
factor.
4 Press . On dual channel meters select the required channel.
5 Use the and keys to highlight the Frequency value field and
press to display the Frequency pop- up. Use the numeric keypad
to enter the required value in the Frequency pop- up window.
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