Automatic electric ltd. Is engaged in manufacturing electrical instruments, power systems and instrument transformers in india. The company has been accredited with an iso 9001 certification. Combimeter dm-800 is a rms 8-in-1digital meter which incorporates micro-controller system, which samples voltage and current signals and computes voltage, current, frequency, active power, reactive power, apparent power & active energy. Power factor is computed by power division method.
1. parameters are displayed on four digit, seven segment, led display.
2. a single dm800 meter can replace 12 meters viz. 3 ammeters, 3 voltmeters, 1 frequency meter & 1 three phase meters
3. various parameters can be selected by push the "select" button
4. `pfer` p.F. Indication when input current is not applied.
5. `erlo` frequency indication when input signal voltage is not applied.
6. frequency indication on sigma mode when any one of phase voltage signal is absent.
7. sign indication depends upon current direction,
8. eight digit [4+4] indication for active energy with `msb` push-button.
9. combimeter is 3 ph-3 el- 4 w type
