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F1 500mA/250 FUSE

F2 20A/250V FUSE

9V Batte

9V Battery Door

9V Battery Door Screws

Rear cover screws

Rear cover screws

 
Diode Test 

Test current 

Resolution 

Accuracy 

1.0mA typical 

1 mV 

+5% of rdg +15 dgts 

Open circuit voltage: 3.0V dc typical 

 

Audible Continuity 

Audible threshold: Less than35Ω Test current: <1mA dc typical 
 

Maintenance 

 

REPLACING THE BATTERY

 

WARNING

: To avoid electric shock, disconnect the test leads from 

any source of voltage before removing the battery door. 

1.  When the batteries  become exhausted or drop below the operating 

voltage, “   ”  will appear in the left-hand side of the LCD  display. 

The battery should be replaced. 

2.  Follow instructions for installing battery. See the Battery Installation 

section of this manual. 

3.  Dispose of the old battery properly. 

WARNING: 

To avoid electric shock, do not  operate your meter until 

the battery door is in place and fastened securely. 

 

BATTERY INSTALLATION 

WARNING

: To avoid electric shock, disconnect the test leads from 

any source of voltage before removing the battery door. 

1.  Disconnect the test leads from the meter. 

2.  Open the battery door by loosening the screw using a Phillips head 

screwdriver. 

3.  Insert the battery into battery holder, observing the correct polarity. 

4.  Put the battery door back in place. Secure with the two screws. 

WARNING: 

To avoid electric shock, do not  operate the meter until 

the battery door is in place and fastened securely. 

NOTE

: If your meter does not work properly, check the fuses and 

battery to make sure that they are still good and that they are properly 

inserted. 

REPLACING THE FUSES 

WARNING

:  To avoid electric shock, disconnect the test leads  from 

any source of voltage before removing the rear cover (fuse door). 

1. Disconnect the test leads from the meter and any item under test. 

2. Open the fuse door by loosening the screws on the rear cover using 

a Phillips head screwdriver. 

3. Remove the old fuse from its holder by gently pulling it out.   

3.  Install the new fuse into the holder. 

4.  Always use a fuse of the proper size and value (0.5A/250V -

φ

5 x 20 , 

fast blow for the 400mA range, 20A/250V –

φ

6.3 x 32 fast blow for 

the20A range). 

5.  Put the fuse door back in place. Insert the screw and tighten it 

securely. 

WARNING

: To avoid electric shock, do not operate your meter until the 

fuse door is in place and fastened securely.

 

 

 

 

 

Summary of Contents for DM-930

Page 1: ...1 0 DM 930 AUTOMOTIVE MULTIMETER INSTRUCTION MANUAL Auto Power Off 4 2...

Page 2: ...t tested must be protected by a 20A fuse or circuit breaker Do not use the meter if it has been damaged Do not use any test leads if the insulation is damaged or if metal is exposed Safety Cont d Dang...

Page 3: ...C AC DC20A 20A 20A DC AC 20 Amp measurement for 30 seconds maximum Getting Started This chapter will help you get started It describes the basic functions of the Meter Meter Basics 1 Digital LCD displ...

Page 4: ...DIS Hz ms CYL Button Press to this button to select STROKE 4 2DIS Hz ms CYL range V A Resistance manual Range Manual Ranging The meter turns on in the autoranging mode Press the Range button to go to...

Page 5: ...Pmin or Pmax indicator switches off Note If the Function switch position is changed after a calibration the Peak Hold calibration must be repeated for the new function selected MAX MIN 1 Press the MA...

Page 6: ...cation that has capacitors in the circuit be sure to turn the power OFF on the test circuit and discharge all capacitors Accurate measurement is not possible if external or residual voltage is present...

Page 7: ...re performing any work Select the Capacitance CAP function with the function dial and MODE button Insert Black lead in COM terminal Red lead in V RPM terminal CAUTION When checking in circuit capacita...

Page 8: ...nsure of the current draw IMPORTANT Turn OFF all power to the circuit or disconnect the circuit from the power source Connect The Red probe to the side of the circuit closest to the power source The B...

Page 9: ...in COM terminal Red lead in V RPM terminal Connect the Black test probe to ground Connect the Red test probe to the signal wire circuit The illustration for a mixture control solenoid is shown with th...

Page 10: ...ct black test probe to a good ground at the fuel injector or the negative vehicle battery post Connect red test probe to the fuel injector solenoid driver input on the jumper cable Start the engine A...

Page 11: ...w battery indication The is displayed when the battery voltage drops below the operating level Measurement rate 2 times per second nominal Auto power off Meter automatically shuts down after approx 30...

Page 12: ...Resistance Range Resolution Accuracy 400 0 0 1 1 2 of rdg 4 dgts 4 000k 1 1 0 of rdg 2 dgts 40 00k 10 1 2 of rdg 2 dgts 400 0k 100 4 000M 1k 40 00M 10k 2 0 of rdg 3 dgts Capacitance Range Resoluti on...

Page 13: ...t leads from the meter 2 Open the battery door by loosening the screw using a Phillips head screwdriver 3 Insert the battery into battery holder observing the correct polarity 4 Put the battery door b...

Page 14: ...still toggled ON Warranty This PDI product is warrantied to be free from defects in materials and workmanship for a period of two 2 years from the verified date of purchase During this warranty period...

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