NewTrend · digital voltage and frequency meter
Product overview
The 91-2080 simultaneously displays AC voltage and power frequency on separate LED rows. Red digits show the voltage and green digits show frequency, allowing both quantities to be read from one compact 45 × 45mm panel instrument. It draws its operating supply directly from the measured AC input.
Technical specifications
| Model | 91-2080 |
|---|---|
| Measured quantities | AC voltage and frequency |
| Voltage range | AC 40.0–300V |
| Frequency range | 45.0–65.0Hz |
| Voltage display | 3-digit red LED |
| Frequency display | 3-digit green LED |
| Measurement accuracy | 1% ±2 digits |
| Measurement speed | Approximately 2 readings per second |
| Voltage input | AC 40–300V |
| Supply | Self-powered from the measured AC input |
| Overall dimensions | 45 × 45 × 38mm |
| Mounting | Panel mounting with rear fixing studs |
| Rear dimension references | 34mm terminal-area width; 3mm fixing-stud reference |
| Input connection | Rear voltage-input terminals |
| Illustrated continuous-working-life reference | Typically over 30000 hours |
Display and measurement behaviour
The upper three-digit red display shows AC voltage over the 40.0–300V range. The lower three-digit green display shows frequency from 45.0 to 65.0Hz. The original specification gives 1% ±2 digits accuracy and approximately two readings per second.
Wiring and measurement input
Connect the measured AC input to the two rear screw terminals. The original connection illustration identifies live and neutral as interchangeable for this AC input. The same AC40–300V input supplies the meter, so a separate auxiliary power supply is not required.
Dimensions and panel installation
The original outline shows a 45mm square front, 38mm overall depth, a 34mm rear terminal-area reference and a 3mm fixing-stud reference. Use the rear studs and nuts to secure the meter to the panel. These references are preserved as shown; the rear width is not presented as an independently verified panel-cutout specification.
Applications and included equipment
Typical uses include panel-mounted AC voltage and frequency monitoring in industrial, commercial and residential electrical systems. The original feature material highlights the compact size, LED readability, rapid updates, installation and wide AC measurement input. The illustrated parameter table separately gives a typical continuous-working-life reference of over 30000 hours.
