Harbor Freight Tools CEN-TECH 41080 Скачать руководство пользователя страница 8

OPERATING INSTRUCTIONS   
DC VOLTAGE MEASUREMENT   

1. 
 
2. 
3. 
4. 
 

Connect the red test lead to the “V” jack and the black lead to the “COM” 
jack. 
Set rotary switch at desired 1000V

  position.   

Connect test leads across the source or load being measured. 
Read voltage value on the LCD display along with the polarity of the red 
lead connection. 

 
AC VOLTAGE MEASUREMENT 

1. 
 
2. 
3. 
4. 

Connect the red test lead to “V” jack and the black test lead to the “COM” 
jack. 
Set the rotary switch at desired 750V~ position. 
Connect test leads across the source or load being measured. 
Read voltage value on the LCD display. 

 
AC CURRENT MEASUREMENT 

1. 
2. 
 
3. 

Set the rotary switch at desired A~ position. 
Press  the  trigger  to  open  transformer  jaw  and  to  clamp  one  conductor 
only, making sure that the jaw is firmly closed around the conductor. 
Read current value on LCD display. 

 
RESISTANCE MEASUREMENT 

 

1. 
 
2. 
3. 
 
4. 

Connect the red test lead to “

” jack and black test lead to the “COM” jack. 

(The polarity of red lead is positive “+”.)   
Set the rotary switch at desired ”

” range position. 

Connect  test  leads  across  the  resistor  to  be  measured  and  read  LCD 
display. 
If the resistance being measured is connected to a circuit

turn off power 

and discharge all capacitors before applying test probes. 

 

 
NOTE: 

1. 
 
 
2. 
 
3. 
 
4. 
 

If the resistance being measured exceeds the maximum value of the range 
selected or the input is not connected, an overrange indication 

OL

will be 

displayed. 
When  checking  in-circuit  resistance,  be  sure  the  circuit  under  test  has  all 
power removed and that all capacitors have been discharged fully. 
For measuring resistance above 1M

, the meter may take a few seconds 

to get stable reading. This is normal for high resistance measurements. 
At 2000M

 range display reading is around 10 counts when test leads are 

shorted. 
These counts have to be subtracted from measuring results. For example, 

-6-

 

Содержание CEN-TECH 41080

Страница 1: ......

Страница 2: ...TS PAGE SAFETY INFORMATION SAFETY SYMBOLS SAFETY PRECAUTIONS MAINTENANCE GENERAL DESCRIPTION FRONT PANEL DESCRIPTION OPERATING INSTRUCTIONS SPECIFICATIONS REPLACING THE BATTERY ACCESSORIES 1 1 1 2 3 3 6 7 8 9 ...

Страница 3: ...f the following European Community Directives 89 336 EEC Electromagnetic Compatibility and 73 23 EEC Low Voltage as amended by 93 68 EEC CE Marking However electrical noise or intense electromagnetic fields in the vicinity of the equipment may disturb the measurement circuit Measuring instruments will also respond to unwanted signals that may be present within the measurement circuit Users should ...

Страница 4: ...hich might be at ground potential Keep your body isolated from ground by using dry clothing rubber shoes rubber mat or any approved insulating material You always are careful when working with voltages above 60V dc or 30V ac rms Keep fingers behind the probe barriers while measuring Never use the meter to measure voltages that might exceed the maximum allowable input value of any function Never to...

Страница 5: ...Rotary switch This switch is used to select functions and desired ranges as well as to turn on off the meter Back light To use this function press the Back light button When this button is pushed the Back light of display is on After about 3 5 seconds the Back light is self off The Back light is on again just push this button once Display 3 1 2 digit 7 segment 18mm high LCD V jack This is positive...

Страница 6: ...e function and range and press the MAX button When this is done the MAX annunciator will appear in the display Next by inputting a signal the MAX function operates This maximum value is held in digital memory for a long period To exit the MAX mode press the MAX button once again Trigger Press the lever to open the transformer When the lever is released the jaws will close again 4 ...

Страница 7: ...CLAMP METER LAYOUT 5 ...

Страница 8: ... LCD display RESISTANCE MEASUREMENT 1 2 3 4 Connect the red test lead to Ω jack and black test lead to the COM jack The polarity of red lead is positive Set the rotary switch at desired Ω range position Connect test leads across the resistor to be measured and read LCD display If the resistance being measured is connected to a circuit turn off power and discharge all capacitors before applying tes...

Страница 9: ... with relative humidity to 80 GENERAL Maximum voltage between terminals and earth ground CAT II 1000V dc or 750V ac rms sine Display LCD 1999 counts updates 2 3 sec Polarity indication displayed for negative polarity Overrange Indication Only figure OL on the display Jaw opening capability 55mm Max conductor size Power 9V battery NEDA 1604 or IEC 6F22 Low battery indication appears on the display ...

Страница 10: ...uency range 50Hz to 60Hz RESISTANCE Range Resolution Accuracy 200Ω 0 1Ω 1 0 of rdg 3 digits 20kΩ 10Ω 1 5 of rdg 5 digits 20MΩ 10kΩ 1 5 of rdg 5 digits 2000MΩ 1MΩ 5 0 of rdg 10 10 digits CONTINUITY Range Description If continuity exists about less than 30Ω built in buzzer will sound REPLACING THE BATTERY WARNING Before attempting to open the case of battery always be sure that test leads have been ...

Страница 11: ...attery 4 Replace the battery cover and reinstall the screw ACCESSORIES Operator s instruction manual Set of test leads Gift box 9 volt battery NEDA 1604 6F22 006P type CAUTION Using this appliance in an environment with a strong radiated radio frequency electromagnetic field approximately 3V m may influence its measuring accuracy The accuracy can be reduced to 12 of reading 6 digits The Clamp is u...

Страница 12: ......

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