GW Instek GPT-9800 series User Manual - Manual (Page 31)

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1. To set the safety extra low
voltage, press the SELV key.
2. To set the SELV use the number pad and press
Confirm.
SELV Range 0～99 volts
3. Press ON to enable the SELV.
SELV Setting On/Off
For more details see the System Settings chapter of the GLC-9000 user
manual.