Overview
The Simpson M7980-2 panel meter is a heavy-duty analog instrument built for accurate DC current measurement in industrial and power systems. This 4.5-inch rectangular panel meter features a proven Annular d’Arsonval movement mechanism and is calibrated for 0-1500 ADC (amperes DC) operation. With decades of Simpson Electric reliability backing it, the M7980-2 serves as a drop-in upgrade or direct replacement for legacy metering installations.
Key Features
- Annular d’Arsonval Movement: Self-shielding design allows installation in steel panels without requiring recalibration
- Shock Protection: Spring-loaded pivot and jewel suspension protects the meter mechanism during transport and operation
- Durable Construction: Bakelite case and cover ensure long service life in harsh industrial environments
- External Shunt Compatible: Requires external shunt (sold separately); calibrated for 5-foot leads at 0.065Ω
- Panel Mount: 4.5-inch rectangular format fits standard panel cutouts
Technical Specifications
The following specifications apply to the Simpson M7980-2 panel meter:
- Measurement Range: 0–1500 ADC (amperes DC)
- Movement Type: Annular d’Arsonval
- Case Material: Bakelite
- Panel Format: 4.5-inch rectangular
- Shunt Configuration: External shunt required (not included)
- Shunt Calibration: 5-foot lead length at 0.065Ω
- Lead Sensitivity: ±0.1Ω changes indication by 1% at full scale
- Suspension: Spring-loaded pivot and jewel bearing
- Operating Environment: Industrial; steel panel compatible without recalibration
Typical Applications
The Simpson M7980-2 is commonly used in the following applications:
- Welding power supply monitoring (amperage readout)
- Industrial machinery and motor control panels
- Power distribution and electrical testing equipment
- Battery charging systems and DC power supplies
- Equipment upgrades and modernization of legacy control systems
- Laboratory and field electrical measurement
Compatibility & Replacements
Compatible With
- DC power systems and circuits rated for 0–1500 amperes
- Standard electrical panel installations with 4.5-inch cutout spacing
- External current shunts and lead networks
- Industrial control cabinets and electrical enclosures
- Welding equipment and power supply installations
Replaces / Drop-In Replacement For
The Simpson M7980-2 directly replaces earlier Simpson panel meter models in the same rectangular series rated for 0–1500 ADC operation. Verify mechanical fit and shunt compatibility with your existing installation before ordering. Contact your system integrator if you are uncertain about cross-compatibility.
Works With
- External current shunts (0.065Ω @ 5-foot lead)
- Standard electrical panel mounting hardware
- DC power measurement systems and control circuits
- Legacy and modern industrial control architectures
