Megger DCM330 Open-Jaw Clamp Multimeter
The Megger DCM330 is a compact open-jaw clamp meter that combines an AC current clamp with the functions of a basic multimeter, designed for electricians, electrical contractors, maintenance technicians, and panel testers in Ireland who need a single instrument for current, voltage, resistance, and continuity measurements made on single conductors. Powerpoint Engineering supplies the DCM330 alongside the wider Megger handheld test instrument range, with calibration and service backed by our in-house lab.
The open-jaw design is the clue to the product's character. Where a traditional clamp meter wraps a closed jaw around a conductor, the DCM330's open-jaw fork lets you hook a single live conductor in a tight panel without dismantling the wiring, which is the situation electricians actually find themselves in most days.
What the DCM330 measures
- AC current to 200 A on single conductors using the open-jaw fork.
- AC voltage to 1000 V for distribution-level voltage measurements.
- DC voltage for control circuits and battery work.
- Resistance measurements for continuity and basic component checks.
- Continuity test with audible buzzer.
- Non-contact voltage detection (NCVD) for live circuit identification before opening a panel.
It is intentionally not the most full-featured clamp meter Megger make. The DCM330 is the small, fast tool you reach for when you need to confirm load current on a single circuit, prove a circuit is dead before working on it, or check a control voltage, without unpacking a larger instrument.
Key features
- Open-jaw fork design: hook a single live conductor without disconnecting the wiring; faster than a clamp on tight panels.
- CAT III 1000 V safety rating: cleared for use throughout the LV distribution and downstream of the meter.
- Compact, pocketable handheld: fits in a tool belt, not a tool bag.
- Audible continuity: faster fault-finding than reading the display.
- Auto-ranging: removes the need to switch ranges manually during fault-finding.
- Battery-powered with auto power-off: long working life between battery changes.
Specifications: what to confirm before you order
|
Specification |
What to confirm |
|
AC current |
200 A AC, on single conductors using the open-jaw fork |
|
Voltage |
AC and DC voltage measurements up to 1000 V AC |
|
Safety rating |
CAT III 1000 V |
|
Functions |
Current, voltage, resistance, continuity, non-contact voltage detection |
|
Display |
Backlit digital display for low-light work |
|
Calibration |
Supplied calibrated; periodic recalibration through Powerpoint's lab |
Target users and applications
- Electricians and electrical contractors carrying out daily commissioning, maintenance, and fault finding
- Panel builders and switchgear assemblers verifying ferrule and terminal terminations
- Maintenance technicians on commercial, industrial, and renewable sites
- Building services electricians measuring lighting, HVAC, and small plant loads
- Toolbox replacement for older fixed-jaw clamp meters that no longer meet CAT III 1000 V
Typical applications include load current checks on single-circuit conductors in distribution boards, voltage verification on lighting and small motor circuits, continuity testing on cable runs, and live-circuit identification using non-contact voltage detection. The DCM330 is the daily-driver test instrument that complements the larger Fluke clamp meters and the dedicated Megger insulation testers in a contractor's toolkit.
As authorised Megger distributor in Ireland, Powerpoint Engineering supplies the DCM330 with in-house calibration and repair, accessory supply, and the wider Megger range for daily electrical testing.
FAQs
What is an open-jaw clamp meter and when is it useful?
An open-jaw or "fork" clamp meter has a slot in the jaw rather than a closed loop, allowing the user to hook a single live conductor without disconnecting it. This is faster than a closed-jaw clamp in tight panels and saves the time and risk of separating wiring just to take a reading.
Does the DCM330 measure True RMS?
The DCM330 is an average-responding clamp meter, suitable for general electrical work with predominantly sinusoidal current. For loads with significant harmonic distortion (VFDs, switch-mode supplies, modern electronic plant), choose a True-RMS clamp meter such as the Fluke 373 or a higher-class Megger model.
Does the DCM330 need calibration?
Yes. As a measurement instrument used for inspection and report decisions, the DCM330 should be recalibrated periodically. Powerpoint Engineering's calibration laboratory recalibrates Megger handheld instruments and supplies a traceable certificate.
To match the right Megger clamp meter to your daily work and toolkit, request a quote or speak to our team for compatibility advice.
Megger DCM330 Fork Multimeter Datasheet
For additional technical details about the Megger DCM330 Fork Multimeter please refer to the product datasheet.
