User
EM1230
Handheld Digital Oscilloscope
,
s Manual
CHB
TRIG
CHA
CHA
CHB
3
3
EM1230
F1
F2
F3
F4
F5
R/H
V
V
S
nS
mV
mV
AUTO
MENU
7
1.2 Measurement port
CHA
CHB
External signal input test port, CHA and CHB either as single-channel
oscilloscope can also be used as a dual-channel oscilloscope in the oscilloscope mode.
COM
Oscilloscope and multimeter measurements common ground port
TRIG:
1 Oscilloscope mode Used in SCOPE mode to trigger (or start) acquisitions from an external
source
2 Multimeter mode DC voltage \ AC voltage \ Resistance \ Continuity \ Diode \ capacitance \
current measurement input ports
Note:
1 Note that each port safety limit, do not exceed the maximum test range
2 The multimeter testing current mode, you must use the current probe
3 Note that proper grounding
(Incorrect Grounding)
(Correct Grounding)
A ground loop can be created when you use two ground leads connected to different ground
potentials. This can cause excessive current through the grounding leads
