Figure 8: Split core measurement unit installation
Attention：Forbid hot plugging RJ12 connect to PLbus, because of the
voltage passed safety range on RJ12 after SPM20 power on.
Chapter 4 Display & key operation
4.1 Full display
SPM20has a LCD with resolution ratio of
128*64, which can realize multi-function
menu change by the two key on LCD, and the
menu prompt.
Remark：If no key operation within 60s, LCD
backlight will be off, till the operation cause it
lighting.
Ua 238.6 V
Ub 119.6 V
Uc 119.6 V
F 49.98 Hz
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