Gw-instek GCM-303 User Manual download pdf (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

Red testing lead

Black testing lead

MAX

SELECT

OFF

600V

COM

CLAMP METER

AUTO RANGE

MAX

SELECT

OFF

600V

COM

CLAMP METER

AUTO RANGE

MAX

SELECT

OFF

600V

COM

CLAMP METER

AUTO RANGE

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Gw-instek GCM-303 User Manual Page 6

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