... 9 ...
4.4 ACA :
1. Connect the black test lead to “COM” terminal and the red one to “mA” terminal (max.2A) or “20A” terminal.
2. Set the knob to ACA range, connect the test leads across to the circuit under measured, the polarity will be displayed
with the voltage reading value.
3. The meter might be not zero at ACA range, it’s normal and has no effect on the reading.
NOTE :
1. See DCA measuring NOTE 1 ~ 4
2. To get more accuracy, when selecting range, it’s better to select the range which the reading is more than 10% of full range.
4.5 RESISTANCE MEASURING
1. Connect the red test lead to V
terminal, the black one to “COM” terminal.
“
W
Hz”
2. Set the knob to range, connect the test leads across to the resistance under measured.
W
NOTE :
1. If the resistance is larger than the max. Value of selected range, “
” displays. Set the knob to a higher range.
OL
When the resistance is 1M or larger than 1M , it will take a few seconds to be stable, it’s normal in high resistance
W
W
measuring.
2. When the input terminal is n
open circuit, OL displays.
u der
3. When measuring resistance in-line, be sure that power of the circuit under measured is turned off and all capacitors
are released completely.
4.
pen voltage is
V
.
Low range for o
about 1 ; the high range is 2V
4.6 DIODE AND CONTINUITY TEST
1. Connect the red test lead to V
terminal, the black one to “COM” terminal (note: the polarity of the red lead is +).
“
WH
z”
2. Set the knob to diode range, connect the test leads across to the diode or circuit under measured.
3. When measuring diode, the reading is forward voltage drop, if making continuity test, buzzer sounds
when the resistance between the test leads is less than approx. 50
W
± 20
W
.