GW Instek GCM-303 - Manual (Page 6)

n Diode Check (
)
1.Set the function switch knob on
2.
Symbol will appear on the LCD
3.Connect the test leads to the diode and then read the
value when it stabilizes
(A)Forward-bias Diode Test
Connect black test lead to the cathode and red one to
the anode
Note that reading close to 0V represents a short-
circuit and "OL" symbol indicates an open-circuit.
(B)Reverse-bias Diode Test
Connect black test lead to the anode and red one to
the cathode. Normally, it shows OL on display,
indicating that the diode under test is normal. The
diode is defective if the display gives a certain
voltage level.
4.When measurement finished, set the function
on OFF position to turn off the meter.
Silicon diode value reading approximate 0.5~0.7V
Germanium diode value reading approximate 0.5~0.7V
switch
knob
-9- -10-
n Continuity Measurement (
)
1.Set the function switch knob on
2.Press SELECT key until
symbol appears on LCD
3.Plug the black test lead into COM terminal and the red
one into terminal
4.Connect the test leads to the circuit under test. If
circuit is continuous or less than 60 ( + _ 20 ), the
beeper will sound
5.When measurement finished, set the function switch
knob on OFF position to turn off the meter.
When power on the meter and you don't touch any key
or function switch knob for 15 minutes, the meter will
turn the power off automatically. One minute before
the meter shut down, the alarm sounds to warn the
users. Once the meter turns the power off already, you
can press the MAX key to regenerate the meter again.
(3) AUTO POWER OFF (POWER-SAVING)DEVICE
+
B
A
Red testing lead
Black testing lead
MAX
SELECT
OFF
600V
COM
V V
A
AC CLAMP METER AUTO RANGE
MAX
SELECT
OFF
600V
COM
V V A
AC CLAMP METER AUTO RANGE
MAX
SELECT
OFF
600V
COM
V V A
AC CLAMP METER AUTO RANGE