Milwaukee 2217-20 True RMS Multimeter: What It Does and What to Check
As an Amazon Associate we earn from qualifying purchases.
Quick answer
- The Milwaukee 2217-20 is a True RMS digital multimeter (DMM). The Milwaukee operator’s manual (cat. no. 2217-20) says all voltage and current readings are True-RMS values.
- Milwaukee states a safety category of CAT III 600 V for the meter. The manual says never to measure on a circuit where voltage above 600 V rms exists.
- The manual lists a current range of 10 A AC and DC, protected by a 600 V, 10 A fast-acting fuse. The product page also carries a “Measures up to 600A AC” line that does not match the manual. Check the manual before you rely on either figure.
- Milwaukee’s product page and product sheet state a 5-year warranty and recommend calibration once a year.
What the Milwaukee 2217-20 measures
A multimeter measures electrical quantities by switching the input between functions. On the 2217-20, the rotary dial selects the function, and the manual’s measurement table lists the following ranges and resolutions. Read the table as Milwaukee prints it, because some entries apply only to certain ranges.
- AC voltage: 600.0 mV/6.000 V, 60.00 V and 600.0 V ranges. Accuracy is stated as ±(1.0% + 3 dgt) for 45 to 500 Hz and ±(2.0% + 3 dgt) for 500 to 1000 Hz.
- DC voltage: the same 600.0 mV to 600.0 V ranges, stated at ±(0.5% + 2 dgt).
- Low-impedance voltage (Lo-Z): a 600.0 V range at 0.1 V resolution, stated at ±(2.0% + 3 dgt). Milwaukee describes the Lo-Z mode as having an input impedance of approximately 4 kΩ.
- Resistance: 600.0 Ω up to 40 MΩ across several ranges. The manual gives the 40 MΩ range an accuracy of ±(1.9% + 5 dgt).
- Continuity: a buzzer that sounds at 30 Ω or less.
- Capacitance: 100.0 µF and 1000 µF ranges.
- Current: AC and DC current from 0.40 mA to 600.0 mA, and 6.000 A and 10.00 A. The manual gives AC current accuracy of ±(1.5% + 3 dgt) for 45 to 500 Hz and DC current accuracy of ±(1.0% + 3 dgt).
- Frequency: ranges up to 9.999 kHz and 50.00 kHz in the manual’s table.
- Temperature: -40.0 °C to 400.0 °C and -40.0 °F to 752.0 °F, stated for the meter itself. The manual notes that a temperature probe may have different specifications.
The product page describes the same meter with the phrase “Contact temperature measurement from -40 to 752°F”, and it lists a Lo-Z feature, a backlight, a bargraph, and HOLD, MIN and MAX functions. Those features match the functional description in the manual, which lists a Range button, a °F/°C button, a Backlight button, a Min/Max button and a Hold button.
Manufacturer specifications in one place
The table below uses only figures printed in the Milwaukee manual or on Milwaukee’s product page. Where a figure is not printed, the cell says so.
| Item | What Milwaukee states | Where it is stated |
|---|---|---|
| Safety category | CAT III 600 V | Manual (general specifications, “600 V Cat III Rated”); product page |
| Maximum voltage, any terminal to earth | 600 V Cat III | Manual, general specifications |
| Fuse | 600 V AC/DC, 10 A fast-acting (Milwaukee p/n 22-89-0305) | Manual, general specifications |
| Current range | 10.00 A (AC and DC) | Manual measurement table; product sheet |
| Current range (conflicting) | “Measures up to 600A AC” | Product page only; the manual does not state 600 A |
| Overload protection, current | AC/DC 20 A for 10 seconds | Manual, overload protection note |
| Maximum measurement time at 10 A | 1 minute, then at least 20 minutes rest | Manual |
| Ingress protection | IP54 | Manual, general specifications |
| Drop test | 1 meter | Manual, general specifications |
| Battery | 2 AA, approximately 26 hours with all lights on | Manual; product sheet lists 2 AA batteries |
| Operating temperature | -10 °C to 50 °C; current measurements -10 °C to 40 °C | Manual |
| Operating altitude | 2,000 m | Manual |
| Warranty | 5 years | Product page; product sheet |
| Calibration | Milwaukee recommends calibration service once every year | Product page |
| Counts or display resolution in counts | Not stated as a count figure; the manual gives resolution per range (for example 0.01 V and 0.1 V) | Manual measurement table |
How to use the meter safely
Electrical work can kill, and the Milwaukee manual opens with that warning. The manual tells the user to read the full operator’s manual before use, and it gives several limits that a buyer should understand before the meter reaches a job site.
- Match the category to the circuit. The meter is rated CAT III 600 V. Do not use it on a circuit where voltage above 600 V rms exists. The manual also says to use only leads rated 600 V CAT III or better. A meter’s rating does not make an unrated lead safe, so check the leads too.
- Use the right jack and function. Current readings belong on the current jacks. Do not attempt a current measurement when the open-circuit voltage is above the fuse protection rating. Do not apply more than the rated voltage marked on the meter between terminals, or between any terminal and earth.
- Respect the time limit at 10 A. The manual says the maximum measurement time at 10 A is 1 minute, followed by a rest of at least 20 minutes.
- Do not improvise the fuse. The manual says not to install substitute parts or replace the fuse with anything other than the specified fuse. The specified part is a 600 V AC/DC, 10 A fast-acting fuse, Milwaukee p/n 22-89-0305.
- Keep the work at the right level. Panel, service entrance and utility work belongs to a licensed electrician. A meter is a measuring tool, not a substitute for the training that work requires.
- Handle batteries and automotive systems with care. Automotive battery checks are a common use. Disconnect and handle batteries safely, and do not take readings on airbag wiring or on high-voltage hybrid or EV systems with a general-purpose meter.
What to check before you buy
Each item below comes from a figure printed in the manual or on Milwaukee’s product page. None of them is a judgement about how well the meter performs.
- Your highest voltage. The stated voltage range tops out at 600 V. If your work involves higher voltages, the 2217-20 is outside its stated range.
- Your current need. The manual states 10 A AC and DC. The product page’s “600A AC” line conflicts with the manual. Ask Milwaukee or check the printed label on the meter before you buy for high-current work.
- Your true RMS need. Milwaukee states True RMS measurement for both voltage and current. Whether you need that feature depends on the waveform you measure.
- Your battery supply. The meter uses 2 AA batteries. The product sheet lists AA batteries as included.
- Temperature probe. The manual says the temperature probe may have specifications different from the meter. Read the probe’s own figures before relying on a temperature reading.
- Calibration plan. Milwaukee recommends calibration service once a year. Plan that cost and downtime if the meter sees daily professional use.
How we chose
This article covers one model. It does not compare the 2217-20 with other meters, and it does not rank it. The sources were chosen because each one is a Milwaukee document or a copy of a Milwaukee document that identifies the manufacturer and gives a document number or date. The manufacturer operator’s manual is the primary source for measurement figures. The product page is used for the warranty, the calibration advice and the wording of its claims. The third-party copy of the product sheet is used only to confirm figures that also appear on the product page.
What we could not verify
- The sources do not state a counts figure for the display. The manual gives resolution per range instead.
- The product page’s “Measures up to 600A AC” line conflicts with the 10 A figure in the manual. The sources do not explain the difference. Treat the 10 A figure as the one printed in the operator’s manual, and confirm with Milwaukee before you rely on any other figure.
- The sources do not give fuse ratings for the current jacks beyond the 600 V AC/DC, 10 A fast-acting fuse listed in the manual.
- The sources do not state a battery replacement interval beyond the approximate 26-hour run time with all lights on.
- Milwaukee’s product page lists a “Read More” link and a product sheet that the sources do not reproduce in full. Any detail beyond the sections cited here is not covered.
FAQ
Is the Milwaukee 2217-20 a True RMS meter?
Yes, according to Milwaukee. The manual states that all voltage and current readings are True-RMS values, and the product page lists True RMS as a feature.
What is the CAT rating of the Milwaukee 2217-20?
Milwaukee states CAT III 600 V. The manual defines Cat III as the classification for transient overvoltages based on nominal line voltage to earth, and it says the meter must not be used on circuits where voltage over 600 V rms exists.
What fuse does the Milwaukee 2217-20 use?
The manual lists a 600 V AC/DC, 10 A fast-acting fuse, Milwaukee p/n 22-89-0305. It also warns the user not to replace the fuse with a substitute.
Can the Milwaukee 2217-20 measure 600 A?
The manual does not state a 600 A current range. The product page says “Measures up to 600A AC”. Because the two sources disagree, the manual figure of 10 A is the one printed in the operating instructions. Ask Milwaukee to confirm before you buy for high-current work.
Does the Milwaukee 2217-20 come with a warranty?
Milwaukee’s product page states a 5-year warranty. The product sheet gives the same figure.
Bottom line
The Milwaukee 2217-20 is a CAT III 600 V True RMS multimeter with a stated 10 A current range and a fuse specified in the manual. Match the meter to your highest voltage and your highest current before you buy, respect the 1-minute limit at 10 A, and keep any panel or service work with a licensed electrician.
Sources
- Milwaukee Tool, Operator’s Manual, True RMS Multimeter (DMM), cat. no. 2217-20, document 58-14-2219d6, printed 01/13. Opened 2026-10-27 from https://documents.milwaukeetool.com/58-14-2219d6.pdf (manufacturer host).
- Milwaukee Tool, 2217-20 product page. Opened 2026-10-27 from https://www.milwaukeetool.com/Products/2217-20 (manufacturer website).
- Milwaukee 2217-20 product sheet, third-party copy hosted by State Electric. Opened 2026-10-27 from https://default.assets-stateelectric-prod.roccommercecloud.com/assets%2Fea38a52080ab7c68bd4abb9a6556769e/mil2217-20.pdf (third-party copy of the manufacturer product page).
