Colluck HH0308C, Owner'S Manual

CAUTION:

 If OL shows on the display, disconnect the test lead from circuit immediately to 

avoid damaging the meter. 

    Never connect test lead with circuit when changing the position of function switch. 

                            Do not make current measurements on the 20A scale for longer than 15 seconds 

every 30 minutes. Exceeding 15 seconds may cause damage to the meter and /or 
the test leads. 

 
4.2.5 Resistance Measurement  

1.  Set the function switch to the position of OHMS

, the LED above the jack (V/

Ω

/F/ 

 CAP) will shine.  

2.  Insert the black test lead banana plug into the negative (-) jack (COM) and the red test 

lead banana plug into the positive (+) jack (V/

Ω

/F/ 

 CAP). 

3,   Check if the AUTO, OL and M

Ω

 appear in the display. 

4,   Touch the test probe tips across the resistor under test, read the value on the display.    

(If the resistor is part of the circuit, it is necessary to disconnect one end of the resistor to 
avoid the unwanted interference from the rest of the circuit). 

NOTE

: The meter will be in Auto ranging. If you wish to manually set the range, do so 

following instructions in the Description (4.1Diagram item7) section of this manual. For 
manual ranging, start at the highest range and work down. 

CAUTION: 

Never measuring the resistor that has voltage on it. 

 
4.2.6 Diode Check  

1,   Set the function switch to the position of OHMS 

, the LED above the jack (V/

Ω

/F/ 

 CAP) will shine.  

2,   Insert the black test lead banana plug into the negative (-) jack (COM) and the red test 

lead banana plug into the positive (+) jack (V/

Ω

/F/ 

 CAP). 

3,    Press the 

 button until OL and      appear in the display. 

4,   Touch the test probe tips across the diode under test, read the value on the display. 
5,   Reverse the test probes’ measuring positions across the diode and read the value. 
6,   The result may as follow: 
  6.1, If one reading is around 0.5 and the other reading is OL, the diode is good. 
  6.2, If both readings are OL, the diode is open. 
  6.3, If both readings are 0 or very small number, the diode is shorted.   

(If the diode is part of the circuit, it is necessary to disconnect one end of the diode to 
avoid the unwanted interference from the rest of the circuit). 

CAUTION: 

Never measuring the device that has voltage on it. 

 
4.2.7 Transistor Check  

1,   Set the function switch to the position of h

FE

. 

2.  Determine whether the transistor is NPN or PNP and identify the emitter, base and 

collector leads. Insert the leads in the proper holes in the h

FE 

socket

.

3.  The display will read approximate h

FE 

Value based on the test condition of 10µA DC base  

current  and Vce of approximately 1.5VDC. 
 

4.2.8 Continuity Check  

1,  Set  the function switch to the position of OHMS

, the LED above the jack (V/

Ω

/F/ 

 CAP) will shine.  

2,   Insert the black test lead banana plug into the negative (-) jack (COM) and the red test 

lead banana plug into the positive (+) jack (V/

Ω

/F/ 

 CAP). 

3,    Press the 

 button until OL and    appear in the display. 

4,   Touch the test probe tips across the devise under test. 
5,   If the resistance is less than 20

Ω

, the audible signal will sound.     

(If the resistor is part of the circuit, it is necessary to disconnect one end of the resistor to 
avoid the unwanted interference from the rest of the circuit). 

CAUTION: 

Never measuring the device that has voltage on it. 

 
4.2.9 Capacitance Measurement  

1,   Discharge the capacitor being tested before starting the measurement.