GDM-541/533 User Manual
24
Caution
Use caution when working with voltages
above AC 30Vrms, 42Vpeak or DC 60V. Such
voltages pose a shock hazard.
If the measured resistor is open or the
resistance exceeds the maximum range, the
LCD will display “OL”.
Before measuring resistance, switch off the
power supply of the circuit, and fully
discharge all capacitors.
When measuring low resistance, the test leads
will produce 0.1Ω~0.3Ω measurement
error.
To obtain accurate measurement, short-circuit
the test leads and use the relative value
measurement (REL) mode.
If the resistance is not less than 0.5Ω when the
test leads are short-circuited, please check if
the test leads are loose or abnormal.
When measuring high resistance, it is normal
to take a few seconds to stabilize the reading.
