Bird-technologies 5015 Series-Manual Manual do Utilizador descarregar pdf (Página 17)

Chapter 3 Operation

Zeroing Sensor

Over time, the sensor’s “zero value” (reading with no

applied RF power) can drift, making all readings inac

curate by this value. For example, if the zero value is –

0.02

W, measuring a 50 W signal will give a reading of

49.98

W, a 0.04% error. Measuring a 1 W signal will

give a reading of 0.98

W, a 2% error. If the drift would

be a significant error, rezero the sensor:

1. Ensure the sensor has reached a stable operating

temperature.

2. Ensure no RF power is applied to the sensor.

3. Press “Zero” to begin Calibration.

 Note: Calibration will take about 40 sec-

onds. Do not interrupt the calibration! A bar on

the screen will display calibration progress.

Power Measurement Accuracy

Accuracy

The Bird power sensors are highly accurate. Accuracy is

specified for each sensor type is typically given as a per

cent of reading or of full-scale.

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Bird-technologies 5015 Series-Manual Manual do Utilizador Página 17