GW Instek GDM-350B - Manual (Page 21)

MEASUREMENT OPERATION
19
1. Turn the rotary switch to the “ ” position.
2. Insert the red test lead into the “ ΩmA ” terminal and the black test lead into the
“COM” terminal. If the resistance between both terminals is >70Ω, it indicates
an open-circuit and no buzzer will sound, but if the resistance between both
terminals is ≤10Ω, it indicates a good connection and the buzzer will sound.
The resistance measurement is displayed on the LCD (Unit: Ω).
Warning:
 To maintain measurement accuracy, disconnect circuit power and discharge all
the high voltage capacitors during continuity measurement.
 For continuity testing, the open circuit for voltage is 2.3V.
 Do not input higher than DC 60V and AC 30V voltage to prevent any damage
and injury.