UMF, power frequency meter, really designed for power system use, provides wide input sensing voltage range from 75V to 580V, very accurate & stable conversion with a crystal heart. The unit guarantees accuracy & reliable long term stability.
True power system designing, the unit specification complaints ANSI-IEEE, IEC standards providing full protecting for surge & unusual over input.
True power system designing, the unit specification complaints ANSI-IEEE, IEC standards providing full protecting for surge & unusual over input.
- True power system design complaints
- ANSI-IEEE, IEC standards
- High accuracy of 0.05%
- Display with LCD 4 digits
- Accuracy(23±3℃) 0.05% rd
- Stability < 100 ppm per degree C change, long term draft < 100 ppm draft per year
- Digits & count 4 digits - 9999 counts.
- Display LCD 0.3” with backlight
- Input resistance ≦ 1 MΩ
- Input over 1kVrms for 10 sec, 750V continuous
- Response time 1 of per sec typically
- Dielectrically strength 2.0 kV AC RMS, terminals to reference ground (case), input to power
- Impulse and surge test ANSI/IEEE c37.90.1-1989 (3KV) SWC
- IEC 61000-4-12 ClassⅢ SWC
- IEC 61000-4-4 ClassⅣ SWC
- IEC 61000-4-5 ClassⅣ Impulse
- Operating condition
- Temperature range -10 to 55℃, 20-95% RH non-condensed
- Storage -25 to 70℃, 20-95% RH non-condensed
- Auxiliary power
- AC/DC 85-265V 40-70Hz for AC
- DC 24V or 48V ±15%
- Dissipation maximum 3VA for AC and 2 watts for DC