Lutron CM9940
Mini Dca/Aca Clamp Meter Auto Range
Mini DCA / ACA Clamp Meter
Model: CM‑9940
Replacement for DM6052
Features
- Design meets IEC 61010‑1, IEC 61010‑2‑32 safety requirement.
- Auto range & multi‑functions.
- Measurement for ACA, DCA, ACV, DCV, Ohms, Diode, Hz, Continuity beeper, Relative.
- Wide ranges: 600 A, 240 A clamp current measurement both for ACA & DCA.
- Overload protection circuit is provided for full range.
- LSI circuit provides high reliability and durability.
- Pocket & slim housing case, easy carryout.
- Compact & heavy duty ABS housing fireproof plastic case.
- Water resistance for the front panel.
- Data hold.
General Specifications
| Display | 10.8 mm (0.43”) LCD, 3 digits, max. indication 5000. |
| Measurement | ACA, DCA, ACV, DCV, Ohms, Hz, Continuity beeper, Relative. |
| Range | Auto ranging. |
| Polarity | Automatic switching, “–” indicates negative polarity. |
| Current Sensor | Hall effect sensor. |
| Zero Adjustment | Push button adjustment. |
| Over‑Input | Indication of “1” or “‑1”. |
| Sampling Time | Approx. 0.35 second. |
| Battery | 2 × 1.5V AAA (UM‑3) batteries. |
| Operating Temperature | 0°C to 50°C (32°F to 122°F). |
| Operating Humidity | Less than 80% RH. |
| Weight | 230 g / 0.50 lb (including battery). |
| Dimension | HWD: 175 × 64 × 33 mm (7.0 × 2.5 × 1.3 inch). |
| Max. Conductor Size | 30 mm (1.18 inch) Dia. |
| Accessories Included | Operation manual — 1 PC. Test leads (red & black) — 1 pair. |
| Optional Accessories | Carrying case, Temperature adapter, Light adapter, Ammeter adapter, Pressure adapter, Anemometer adapter, Tachometer adapter, High voltage probe. |
Electrical Specifications (23 ± 5°C)
| Function | Range | Resolution | Accuracy | Overload Protection |
|---|---|---|---|---|
| DCA / ACA | 20 mA | 0.01 mA | ± (0.5% + 2d) | AC/DC 600 V |
| DCA / ACA | 240 A / 600 A | 0.1 A / 1 A | ± (2% + 5d) | |
| DC Voltage | 2.4 V to 600 V | 0.001 V to 1 V | ± (1% + 1d) | AC/DC 600 V |
| AC Voltage | 2.4 V to 600 V | 0.001 V to 1 V | ± (1.5% + 5d) | AC/DC 600 V |
| Ohms | 240 Ω to 240 MΩ | 0.1 Ω to 0.1 MΩ | ± (2% to 3.5%) | AC/DC 400 V |
| Frequency | 50 Hz to 100 kHz | 0.01 Hz | ± (1% + 5d) | AC/DC 250 V |
Additional Functions
| Diode | Short/open conduction, good/defect test. |
| Continuity | If measuring resistance is less than 10 ohm, the beeper will sound. |
Optional Adapters
| Item | Model |
|---|---|
| Carry case | CA‑05A |
| Humidity Adapter | HX‑02 |
| Light Adapter | LX‑02 |
| EMF Adapter | EMF‑24 |
| Pressure Adapter | PS‑403 |
| Anemometer Adapter | AM‑402 |
| Temperature Adapter | DH‑802C/F |
| IR Adapter | IR‑T601 |
| Tachometer Adapter | TA‑601 |
| High Voltage Probe | HV‑40 |
| Test lead with alligator clips | TL‑02AS |
| Selling Unit | EACH |
|---|---|
| Model No | CM9940 |
| Brand |
|
| Description | Mini Dca/Aca Clamp Meter Auto Range |
| Width | 64mm |
| Height | 33mm |
| Length / Breadth / Depth | 178mm |
| Weight | 45.6g |
| Categories |
Test & Measurement Equipment Digital Test Equipment Clamp Meters |
| Data Sheet |
|
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