Product Tutorials
Power Meter Tutorials
Measurement
Variety of Power Measuring Instruments
Inductive Type Wh-meter
Inductive Type Wh-meters, which are based upon the principle of mechanically averaging instantaneous power measure electrical energy consumed in a home for billing purposes. It is guaranteed only commercial frequencies 50/60Hz.
1: current coil 2: Short ring
3: Movable disk 4: Phase adjusting coil
5: magnetic shunt steel 6: manganin resistor
7: Secondary voltage coil 8: Voltage coil
Analog indicate type Power Meter
Principle : Repulsion of magnetic field caused by currents of both Fixed and Moving coils
| Side View | Top View |
Restrictions;
- Frequency bandwidth(It can not measure component upper than 400Hz accurately.)
- Dynamic ranges and accuracy especially in the case of small input
- Immunity against large input current
Analog calculation type Digital Power Meter
Principle : Time Division Multiple analog circuit method Multiplication circuit 
Waveform
Restrictions ;
|
YOKOGAWA 2533 |
Digital Sampling type Digital Power Meter
Principle : Digital filtering method of digital sampled data 
Restrictions ;
|
YOKOGAWA WT2000 |
