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16 

the red test lead into the positive 

(

Ω)

 jack. 

3.  Touch  the  test  probe  tips  to  the  circuit  or  component 

under test 

4.  If the resistance is less than approximately  40

Ω a tone 

will  sound.  The  display  will  also  show  the  actual 
resistance. 

 

DIODE TEST 

WARNING: 

To  avoid  electric  shock,  do  not  test  any 

diode that has voltage on it. 

1.   Set the function dial to                    position and press the 

MODE

 button until the              symbol appears on the top 

of the display. 

2.   Insert  the  black  test  lead  into  the  negative

  (

COM)

  jack 

and the red test lead into the positive (

Ω) 

jack. 

3.

 

 Touch  the  test  probe  tips  to  the  diode  or  semiconductor 

junction you wish to test. Note the meter reading 

4.   Reverse  the  probe  polarity  by  switching  probe  position. 

Note this reading. 

5.   The diode or junction can be evaluated as follows: 

A.  If  one  reading  shows  a  value  and  the  other  reading 

shows 

OL

, the diode is good. 

B. If both readings show 

OL

, the device is open. 

C.  If  both  readings  are  very  small  or  0,  the  device  is 

shorted. 

NOTE:

    The value indicated in the display during the diode 

check is the forward voltage. 
 

FREQUENCY MEASUREMENT 

1.    Set the function dial to the 

Hz/%

 position. 

Содержание DM-918

Страница 1: ...DM 918 OPERATIONS MANUAL AUTORANGING MULTIMETER...

Страница 2: ...ding by using dry clothing rubber soled shoes rubber mats or any approved insulating material Turn off power to the circuit under test before cutting unsoldering or breaking the circuit Small amounts...

Страница 3: ...N symbol indicates a potentially hazardous situation which if not avoided may result damage to the product This symbol advises the user that the terminal s so marked must not be connected to a circuit...

Страница 4: ...ve Input Jack for 10A DC or AC measurements 6 Measuring MODE selection button 7 Range button 8 Hold Backlight button 9 MAX Min Hold button DISPLAY DESCRIPTION Continuity Low Battery Diode HOLD Data Ho...

Страница 5: ...drops below the operating level Measurement rate 3 times per second nominal Auto power off Meter automatically shuts down after approx 15 minutes of inactivity Operating environment 0 C to 50 C 32 F t...

Страница 6: ...acy 6 000V 1mV 1 of rdg 3 dgts 60 00V 10mV 1 2 of rdg 3 dgts 600 0V 100mV 600 0V 1V Input Impedance 10M Frequency Range 50 to 400Hz Maximum Input 600V DC or 600V AC RMS DC Current Autoranging for A an...

Страница 7: ...ut 600mA DC or 600mA AC RMS on A mA ranges 10A DC or AC RMS on 10A range Resistance Autoranging Range Resolution Accuracy 6 0 1 1 2 of rdg 4 dgts 6 1 1 0 of rdg 2 dgts 6 10 1 5 of rdg 2 dgts 6 100 6 1...

Страница 8: ...g 4 dgts Sensitivity 8V RMS Overload protection 250V DC or AC RMS Duty Cycle Range Resolution Accuracy 0 1 99 9 0 1 1 2 of rdg 2 dgts Pulse width 100us 100ms Frequency width 5Hz 150kHz Sensitivity 8V...

Страница 9: ...1 ALWAYS turn the function dial to the OFF position when the meter is not in use This meter has an Auto Power Off function that automatically shuts the meter OFF after 15 minutes of inactivity 2 If OL...

Страница 10: ...ange for the measurements being made and is generally the best mode for most measurements For measurement situations requiring that a range be manually selected perform the following 1 Press the RANGE...

Страница 11: ...ton DC VOLTAGE MEASUREMENTS CAUTION Do not measure DC voltages if a motor on the circuit is being switched ON or OFF Large voltage surges may occur that can damage the meter 1 Set the function dial to...

Страница 12: ...ages if a motor on the circuit is being switched ON or OFF Large voltage surges may occur that can damage the meter 1 Set the function dial to the V position and press the MODE key to select the AC mo...

Страница 13: ...n appears on the left side of the display 6 Remove power from the circuit under test then open up the circuit at the point where you wish to measure current 7 Touch the black test probe tip to the neg...

Страница 14: ...uit at the point where you wish to measure current 7 Touch the black test probe tip to the negative side of the circuit and the red test probe tip to the positive side of the circuit 8 Apply power to...

Страница 15: ...into the positive jack 3 Touch the test probe tips to either side of the circuit or part under test It is best to disconnect one side of the part under test so the rest of the circuit will not interf...

Страница 16: ...t lead into the negative COM jack and the red test lead into the positive jack 3 Touch the test probe tips to the diode or semiconductor junction you wish to test Note the meter reading 4 Reverse the...

Страница 17: ...before making a temperature measurement 1 Set the function dial to the C F position and press the MODE button to select between C Celsius and F Fahrenheit 2 Insert the Temperature Probe s into the Te...

Страница 18: ...screwdriver 3 Remove old battery and insert new battery into battery holder observing correct polarity Replace battery cover and secure with two screws 4 Properly dispose of old battery WARNING To av...

Страница 19: ...the 600mA range 10A 250V fast blow for the 10A range 5 Replace the battery cover and secure with two screws WARNING To avoid electric shock do not operate your meter until the fuse door is in place a...

Страница 20: ...your PDI product at www PDImeters com NOTE Online product registration is required for all warranty claims All warranty claims must have a Return Goods Authorization assigned from PDI in order to beg...

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