The Klein MM200 is one of Klein’s lower end multimeters. It is good for those who are looking for a more basic tester, albeit a reliable one from a respected brand name. It measures all kinds of inputs, including voltage, amps and continuity, and is more suited to light electrical work rather than that of an industrially-rated DMM. In short, it suits general purpose electrics and electronics.
While it doesn’t win any awards for outstanding functionality, ruggedness and accuracy, it is nonetheless an acceptable multimeter at this price point. Standout features from the Klein MM200 review include its small size, the micro-amp and capacitance inputs, and backlit display.
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Key Specs
- Auto ranging
- CATIII 600V safety rating
- Measures temperature, capacitance and frequency
- Measures amps, milliamps and micro-amps
- Continuity has loud beeper
- Diode test
- Data hold
- Backlit screen
- Auto power off
- Low battery indicator
- Size: 5.7” (146mm) x 2.7” (70mm) x 1.7” (45 mm)
- Weight: 14oz (397g)
Included
- Tester
- Test probes / leads
- 9V battery
- Thermocouple (Type K)
Complete Review of the Klein MM200
Main features are the ability to measure AC and DC voltage to 600V, AC and DC amps to 10A, milliamps / micro-amps settings, and temperature (with included type K thermocouple). It also has standard test functionality – resistance, continuity and diode check – as well as frequency / duty cycle check and capacitance. These specs make is pretty useful for checking basic electronic circuitry.
ACCURACY
| RANGE | ACCURACY | RESOLUTION | |
|---|---|---|---|
| AC voltage | 4V / 600V | ±(1.2%+5) | 1mV-1V |
| DC voltage | 400mV / 600V | ±(0.5%+3) | 0.1mV-1V |
| AC current (low) | 400μA / 400mA | ±(1.2%+3) | 0.1μA-0.1mA |
| AC current (high) | 10A | ±(3.0%+5) | 0.1A |
| DC current (low) | 400μA / 400mA | ±(1.0%+3) | 0.1μA-0.1mA |
| DC current (high) | 10A | ±(3.0%+5) | 0.1A |
| Resistance | 400Ω / 40MΩ | ±(0.8%+4) @400-4MΩ | 0.1Ω-0.01MΩ |
| Capacitance | 4nF to 200μF | ±(3.0%+6) @4nF-40μF | 0.001nF-0.1μF |
| Frequency | 9.999Hz to 999.9kHz | ±(0.5%+2) | 0.001Hz-0.1kHz |
| Duty cycle | 0.1% to 99.9% | ±(2.0%+5) | 0.1% |
| Temperature °F | -4°F to 1832°F | ±(3.0%+2) @32-1832°F |
— input impedance is 10MΩ —
Accuracy levels are crude and may not take into account full ranges and digit/count offset. They may also differ from factory specs depending on the state of the battery, integrity of the leads, accuracy of calibration, reliability of the test subject, competence of the user, and environmental conditions.
NOTE: this multimeter should be re-calibrated annually.
Best Suited To: this multimeter is mainly for those into lighter usage, such as home electrics, single phase installations, electronics, DIYers and hobbyists. While CATIII, it is not really suited to industry, but can be relied upon for many tasks as a spare. It will also suit those into the automotive industry to a degree, although the lack of RPM and dwell angle test features may put some off.
Design / Build Quality
The MM200 is a decent looking multimeter, with a pretty good external and internal build quality. While not Klein’s most attractive tester, bear in mind it is in the lower league of their selection of test meters. It is, however, ETL listed.
Importantly, this meter fits in the hand quite snugly, being both small and light enough to hold for a prolonged amount of time. In addition, it comes with a decent stand and rear probe holders. The 9V battery, meanwhile, can be accessed by a single screw on the rear of the device. When low, the display shows a low battery icon.
Display and Interface
The MM200 display is 4000-count (3-3/4 digit, meaning it can display up to a resolution of 39.99 on a given input range). It is clear and durable, displays important icons onscreen and is also backlit, which is a big plus. Be aware that prolonged use of the backlight will drastically lower battery life, which is the typical cause of why a meter may lose charge more quickly than anticipated.
The 10-position dial selector is straightforward. Though not color coded, it is clear which input is which. DC and AC voltage and amperage share inputs, as do continuity / diode check and frequency / duty cycle. Stepping between these is achieved via the Function button.
One obvious negative from the Klein MM200 review – as is often the case with many multimeters in this category – is the lack of a dedicated jack socket for milliamps and micro-amps. As a result, users may find that fuses blow more often than not when testing voltage.
Function and Performance
The DC voltage / AC voltage range may annoy auto technicians as it defaults to AC when selected, meaning you’ll have to hit Function every time before you can test for DC volts. Unlike many meters of this price range, however, the MM200 multimeter has its own capacitance input.
Overall, it performs well enough, with the auto range operating at an acceptable speed, though is naturally not as quick as a typical manual ranging meter. General accuracy away from DC volts may be an issue for some.
BUTTONS
FUNCTION: switch function on a given input selection (such as AC volts to DC volts)
HOLD: freeze the current reading
HZ%: read frequency and duty cycle of a given input
BACKLIGHT: on and off
Protection
The Klein Tools brand has a good reputation for sturdily built tools. This goes for its multimeters too, including the Klein MM200 which is generally well protected both mechanically and electrically. The case has a dual wall and is covered by a rubber boot that protects the corners from bumps and drops. Both milliamps and amp circuits are protected by quick blow fuses. You can also buy an optional replacement fuse kit.
MM200 Pros and Cons
PROS
- Feels sturdy
- Backlit display
- Auto ranging
- Lots of functionality – including separate temperature and capacitance inputs
- Can measure amps continuously
- Milliamps / micro-amps inputs
- Overload protection on current circuits
CONS
- Milliamps shared with main test terminal
- Bit inaccurate
- Cheaper meters available in this bracket
- Better reliability through higher quality probe leads
Roundup
For those on more of a budget, the Klein MM200 multimeter review has a decent alternative to the budget end of more established brands. While not as accurate or precise as it could be, it is a very useful device nonetheless, catering to those with an interest in general electrics, electronics and auto repair.
Alternatively, for more functionality and a higher rating (CATIII – CATIV), you may want to consider the Klein MM1000.