background image

 
 

Safety 

 

 

• 

Circuits under test must be de-energized and isolated before 

connections are made (except for voltage measurements). 

 

• 

Circuit connections must not be touched during a test. Use extreme 

caution when working near bare conductors and bus bars. Accidental 
contact with conductors could result in electrical shock. 

 

• 

Use caution when working near voltages above 60VDC or 30VACrms. 

 

• 

After insulation tests, capacitors must be discharged. 

 

• 

Test leads (including alligator clips) must be in good working order, 

clean and without broken or cracked insulation. 

 

• 

When servicing, use only specified replacement parts. 

 

International Safety Symbols 

 

 

Caution, refer to this manual before using this meter 

 

Dangerous Voltages 

 

 

Meter is protected throughout by double or reinforced insulation 
 
 

 

ELECTRICAL SYMBOLS 
 

 

DC (Direct Current)

.

  

 

AC (Alternating Current)

.

 

 

DC or AC 

 

Important safety information.  
Refer to the manual

.

 

 

Dangerous voltage maybe present

.

 

 

Earth ground

.

 

 

Low battery 

 

Fuse

.

 

Summary of Contents for MM350

Page 1: ...tulations on your purchase of the Triplett MM350 True RMS Auto Ranging Digital Multimeter This instrument performs AC DC voltage AC DC Current Resistance Audible Continuity Diode Temperature measurements and Frequency measurements it is a 3 3 4 digits 3999 counts Auto Ranging DMM ...

Page 2: ...Crms After insulation tests capacitors must be discharged Test leads including alligator clips must be in good working order clean and without broken or cracked insulation When servicing use only specified replacement parts International Safety Symbols Caution refer to this manual before using this meter Dangerous Voltages Meter is protected throughout by double or reinforced insulation ELECTRICAL...

Page 3: ...re the voltage current resistance or capacitance When the meter is in the auto range mode AUTO is displayed To enter and exit the manual range mode a Press RANGE button The meter enters the manual range mode and the symbol AUTO turns off b To exit the manual range mode press and hold down the RANGE button for 2 seconds the meter returns to the auto range mode and the symbol AUTO is displayed 3 Sel...

Page 4: ...t The maximum and minimum values are cleared after the changes the test function or meter be off 5 Relative Button This Meter will display relative measurements in all functions except frequency 6 Hz button When you measure the Hz pressing this button will switch the meter between HZ function and duty cycle function When you measure the ACV pressing this button will switch the meter will show the ...

Page 5: ...ltage which exceeds 600Vdc for DC voltage measurement or 600Vac for AC voltage measurement Measuring Current 1 Connect the black test lead to the COM jack If the current to be measured is less than 200mA connect the red test lead to the INPUT jack If the current is between 200mA and 10A connect the red test lead to the 10A jack instead 2 Set the range switch to desired µA mA or A range If the curr...

Page 6: ...is not connected i e at open circuit the symbol OL will be displayed as an over range indicator c Before measuring in circuit resistance be sure that the circuit under test has all power removed and all capacitors are fully discharged Continuity Test 1 Connect the black test lead to the COM jack and the red to the INPUT jack Note The polarity of the red test lead is positive 2 Set the range switch...

Page 7: ... switch to or range 2 Insert the black or plug of the K type thermocouple to the COM jack and the red or plug to the INPUT jack 3 Carefully touch the end of the thermocouple to the object to be measured 4 Wait a while read the reading on the display Frequency Duty cycle measure 1 Connect the black test lead to the COM jack and the red to the INPUT jack 2 Set the range switch to Hz range 3 Press th...

Page 8: ...s 200mV range 250V DC AC rms Max Input voltage 600V DC 5 2 AC VOLTAGE Auto ranging Range Resolution Accuracy 400mV 1mV 1 2 of rdg 5dgts 4V 1mV 1 0 of rdg 8dgts 40V 10mV 400V 100mV 600V 1V 1 2 of rdg 8dgts Input Impedance 10MΩ Frequency Range 40Hz 400Hz Overload Protection 600V DC or 600AC rms Response Average calibrated in rms of sine wave Max Input voltage 600V AC rms 5 3 TEMPERATURE Rang e Resol...

Page 9: ... Max Input Current INPUT jack 200mA A jack 10A For measurements 5A duration 10 seconds interval 15 minutes Voltage Drop 400µA 40mA and 4A ranges 40mV 4000µA 400mA and 10A ranges 400mV 5 5 AC CURRENT Range Resolution Accuracy 400µA 0 1µA 1 5 of rdg 8dgts 4000µA 1µA 40mA 10µA 400mA 100µA 4A 1mA 2 0 of rdg 10dgts 10A 10mA Overload Protection µA and mA ranges F0 5A 600V fuse 4A and 10A ranges F10A 600...

Page 10: ...op will be displayed Open circuit voltage about 1 5V The built in buzzer will sound if the resistance is less than about 30Ω Open circuit voltage about 0 5V Overload Protection 250V DC AC rms For continuity test When the resistance is between 50Ω and 100Ω the buzzer may sound or may not sound When the resistance is more than 100Ω the buzzer won t sound 5 8 Capacitance Range Resolution Accuracy 40n...

Page 11: ...or s error This meter uses a fuse F1 500mA 600V and F2 10A 600V fast action To replace the fuses open the meter back cover replace the damaged fuse with a new fuse of the specified ratings Reinstall the battery cover and lock this cover Warranty Information Triplett Jewell Instruments extends the following warranty to the original purchaser of these goods for use Triplett warrants to the original ...

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