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4.1 Diagram (Fig. 1) 

1. LCD 

Display. 

2. Function 

Selector 

Use to select the desired measurement or OFF. 

3.  20A Input Jack 

Plug-in connection for the red (positive) lead for 20A measurements only. 

4.  mA/µA  TEMP Input Jack 

Plug-in connection for the red (positive) lead for temperature and current measurements up 
to 400mA only. 

5. COM 

Input 

Jack 

Plug-in connection for the black (negative) lead for all measurements. 

6. V 

/

/F/ 

CAP Input Jack 

 Plug-in connection for the red (positive) lead for voltage, capacitance, frequency, resistor,   
 continuity and diode check. 

7.  MAX / MIN button 

      Use to manually select the desired display.  

8.   Data Hold button 

Use to hold a reading. When this button is pressed, the data being displayed will be frozen in 
the display and a DH will appear. Changes in the input signals will not change the display. It 
can be used in all measurement modes. Press the button again to release this function and 
the DH will disappear. 

9. 

/AC/DC  Hz/% button 

In the OHM 

mode, use this button to choose between continuity check or diode test or 

resistance test. 
In the A AC and D DC mode, use this button to choose between A AC and D DC ranges. 
In the FREQ mode, use this button to choose between frequency test and duty test. 

      10. Relative button 

This is a very convenient function button. It is used for measuring the different (relative) 
value between parts and the reference. 
Ex. During the measurement of a +5V standard DC voltage, press this button once, the value 
on the display will be changed from +5V to 0V. 
Disconnect the test lead from the source (-5V will be displayed on the LCD). 
If you measure a +4.5VDC source, the LCD will display -0.5V. This is indicating that the 
value you measured is 0.5V lower than the standard value. 

      11. Auto Test Lead Insert Indication LED. 

Patented New technology exclusively used for our products. 
The bright LED indicates the right jack to be used related to the selected function and range. 
The LED will shut off after the test lead is fully inserted into the indicated jack. If the test lead 
is inserted into a wrong jack, the LED will flash and the buzzer will sound. 

 
4.2 Operating Instructions 
 
4.2.1 DC Voltage Measurement  

1.  Set the function switch to the position of V DC, the LED above the jack (V/

/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/

/F/ 

 CAP). 

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.  

3.  Touch the test lead tips to the circuit under test. 
4.   The value and polarity of the voltage will appear on the display. 

CAUTION:

 If OL shows on the display, disconnect the test lead from circuit immediately to 
avoid damaging the meter. 

   

   Never apply the voltage over 1000 V. 

   

   Use 

extreme

 caution when working with high voltage. 

   

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

Summary of Contents for HH0308C

Page 1: ...PORTANT Read and understand this manual before using the tester Failure to understand and comply with safety rules and operating Instructions can result in serious or fatal injuries and or property da...

Page 2: ...orking with voltage over the 36V safe point 2 6 NEVER change the position of the function switch during measuring 2 7 CHOOSE the correct positions of all function switches before testing 2 8 NEVER cha...

Page 3: ...60uF 100uF 0 01nF 0 1nF 1nF 10nF 100nF 10 rdg 25dgts 2 5 rdg 10dgts The VAC and AAC ranges are specified from 5 to 100 of the range Input Impedance 10M AC DC measurement Diode Test reads approximate...

Page 4: ...voltage press this button once the value on the display will be changed from 5V to 0V Disconnect the test lead from the source 5V will be displayed on the LCD If you measure a 4 5VDC source the LCD w...

Page 5: ...it only changes the decimal point 3 Remove power from the circuit under test Then open up the circuit at the point where you wish to measure current 4 Touch the black test lead tips to the negative si...

Page 6: ...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...

Page 7: ...above the jack V 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 F CAP 3 Press the HZ button twice the...

Page 8: ...d from any source of voltage 6 4 Remove the screw on the back of the meter then remove the back cover 6 5 Remove the old batteries and insert a pair of new and same type batteries in the right place 6...

Page 9: ......

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