Hioki 3169-20 - Setting the Synchronization Method

5.2 Setting on the Measurement Setting Screen (MEASUREMENT)
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5.2.2 Setting the Synchronization Method
What is PLL?
PLL stands for "Phase Locked Loop" and is a phase synchroniza-
tion circuit. The 3169-20/21 uses PLL to generate a frequency syn-
chronized with the fundamental wave (50/60 Hz) and multiplied by
128, to sample input waveforms of voltage and current. If there is
no PLL input (PLL source), there is no means of sampling input
waveforms, and calculation cannot be performed. This is called
"PLL unlock." When there is no PLL source, the 3169-20/21
switches the synchronization method over to the internal clock (50/
60 Hz fixed clock).
Press the
SET UP
key to display the setting screen.
Press the
F5
(NEXT SCR) key to display the measurement setting
screen. (3169-20: SET UP 1/4, 3169-21: SET UP 1/5)
Move the cursor to "
SAMPLING
."
Set the synchronization method by using the function keys.
* Normally set to PLL
Move the cursor to Measured Frequency.
Set to the frequency of the line to be measured by using the func-
tion keys. (Default: 50 Hz)
PLL PLL
(default)
FIXED Fixed clock
50 Hz
60 Hz
NEXT
SCR
FIXED
PLL