Which of the following is not a factor affecting the frequency accuracy of a dip meter?

A dip meter (or grid-dip oscillator) is a simple test instrument used to measure the resonant frequency of an unpowered radio frequency circuit. Its internal oscillator frequency can be easily pulled off-target by external physical and electrical factors. Factors like stray capacity, hand capacity (your body's capacitance affecting the tuning coil), and over coupling to the circuit under test will physically alter the capacitance or inductance of the dip meter's tuned circuit, shifting its frequency and reducing accuracy. Because a dip meter is a standalone, low-power diagnostic tool used on passive, unpowered circuits, your station's transmitter power output has absolutely no relation to the dip meter's operation or its measurement accuracy.