GW Instek GDM-398 - Manual (Page 19)

GDM-360/397/398/461 User Manual
17
Warning
To avoid injury to your person or damage to the Meter from electric shock,
please do not attempt to measure voltages higher than 1000V, although readings
may be obtained.
When measuring high voltage, take extra care to avoid electric shock.
1. Insert the red test lead into the V terminal and the black test lead into the COM
terminal.
2. Set the rotary switch to V; DC measurement is the default or press the BLUE
button to switch between DC and AC measurement mode. Connect the test
leads across to the DUT. The measured value is shown on the display.
GDM-397/398: Displays the effective value of a sine wave (mean value
response).
GDM-360/461: Displays the true rms value.
3. Press Hz% (GDM-360/397/398) or the yellow button (GDM-461) to obtain the
frequency and duty cycle value.
 Input Amplitude: (DC offset is zero)
 Input Amplitude: ≥range×30%
 Frequency response: GDM-397/398: ≤400Hz, GDM-360/461: ≤1kHz