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User Manual
MM300
True RMS Manual Ranging Digital Multimeter
Introduction
Congratulations on your purchase of the Triplett MM300 True RMS Manual 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
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
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Summary of Contents for Triplett MM300
- Page 1 True RMS Manual Ranging Digital Multimeter Introduction Congratulations on your purchase of the Triplett MM300 True RMS Manual 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 Safety •...
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Page 2: Meter Description
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. Diode Continuity test °C Centigrade °F Fahrenheit AUTO Auto range Conforms to European Union directive. -
Page 3: Operation
Operation DC & AC VOLTAGE MEASUREMENT 1. Connect red test lead to “INPUT” jack, Black lead to “COM” jack. 2. Set RANGE switch to desired VOLTAGE range, if the voltage to be measured is not known beforehand, set switch to the highest range and reduce it until satisfactory reading is obtained. -
Page 4: Diode Measurement
4. Connect test leads to circuit being measured. 5. Read resistance value on Digital Display. DIODE MEASUREMENT 1. Red lead to “INPUT”, Black lead to “COM”. 2. RANGE switch to “ ” range. 3. Connect the red test lead to the anode of the diode to be measured and black test lead to cathode. -
Page 5: Specifications
“ ” FUNCTION 5. After pressing the button, the present reading is held on the display, meanwhile “ ” is displayed on the LCD as an indicator. To exit the Hold Mode, press the button again and the indicator “ ”... -
Page 6: Audible Continuity
RESPONSE: Average responding, calibrated in rms of a sine wave. FREQUENCY RANGE: 45Hz ~ 450Hz OVERLOAD PROTECTION: 600V DC or 600V rms for all ranges. AUDIBLE CONTINUITY RANGE DESCRIPTION Built-in buzzer sounds if resistance is less then 30±20Ω OVERLOAD PROTECTION: 15 second maxi- mum 220 V rms. DC CURRENT RANGE RESOLUTION... -
Page 7: Resolution Accuracy
RESISTANCE RANGE RESOLUTION ACCURACY 200Ω 0.1Ω 2KΩ 1Ω ±（1.0% of rdg+10D） 20KΩ 10Ω 200KΩ 100Ω 2MΩ 1KΩ OVERLOAD PROTECTION: 15 seconds maxi- mum 220Vrms. TEMPERATURE (with K-TYPE PROBE) RANGE RESOLUTION ACCURACY -40 ~150 ± （1.0%+4D） 150 ~1370 ± （1.5%+15D ） -40 ~302 ±... - Page 8 Warranty Information Triplett / Jewell Instruments extends the following warranty to the original purchaser of these goods for use. Triplett warrants to the original purchaser for use that the products sold by it will be free from defects in workmanship and material for a period of (1) one year from the date of purchase.
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