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Klein Tools MM300 Multimeter is a manual ranging multimeter that measures AC/DC voltage, DC current, and resistance. It can also test batteries, diodes, and continuity. Klein Tools' Test and Measurement product line was exclusively designed from the ground up by electricians for electricians. Years of field research, combined with extensive input from electricians across America, inspired the development of meters and electrical testers loaded with innovative, time-saving features.

Product Depth (in.) | 1.78 in |
|---|---|
Product Width (in.) | 3.07 in |
Accuracy Measurement | Non-RMS |
|---|---|
Category Rating | III |
Features | Audible Alert, Data Logging, Interchangeable Leads |
Functions Measured | Amperage, Continuity, Resistance, Voltage |
Included | Batteries |
Maximum AC Current (A) | 0 |
Maximum AC Voltage | 600 |
Maximum DC Voltage | 600 |
Maximum Frequency (MHz) | 0 |
Maximum Resistance (ohms) | 2M |
Number of Functions | 16 |
Power Source | Battery Operated |
Range | Manual Ranging |
Returnable | 90-Day |
Certifications and Listings | CE Certified |
|---|---|
Manufacturer Warranty | Please refer to the attached warranty document in the Product Overview section above under Info & Guides. |
On the Klein Tools Cat. No. MM300, Digital Multimeter, Manual-Ranging, 600V, “OL” indicates an open circuit when testing continuity. During diode testing, it indicates reverse bias or an open device.
The Klein Tools Cat. No. MM300, Digital Multimeter, Manual-Ranging, 600V includes an instruction manual with detailed operating instructions for measuring voltage, current, resistance, continuity, diodes, and batteries. Please refer to the instruction manual that was included with the meter for complete operating instructions. If you no longer have the manual or need additional assistance, please contact Klein Tools Customer Service at customerservice@kleintools.com and we will be happy to help.
Please contact Klein Tools Customer Service 1-800-553-4676 for assistance with your meter.
For information on calibration certification please contact Klein Tools Customer Service 1-800-553-4676
For information on calibration certificates please contact Klein Tools Customer Service 1-800-553-4676
Yes, batteries are included.
39 in.
The Klein Tools MM300 Multimeter will measure DC millivolts.
The Klein Tools MM300 Multimeter has 2 replaceable fuses: 200mA/600V fast-blow fuse (Klein Cat. No. 69031) 10A/600V fast-blow fuse (Klein Cat. No. 69032)
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