YOKOGAWA WT1803

ii
IM WT1801-01EN
Contents
1 Items That This Instrument Can Measure
Measurement Functions Used in Normal Measurement............................................................... 1-1
Harmonic Measurement Functions (Option) ................................................................................. 1-3
Delta Computation Functions (Option).......................................................................................... 1-5
Motor Evaluation Functions (Option) ............................................................................................ 1-5
Auxiliary Input Measurement Functions (Option) .......................................................................... 1-5
High Speed Data Capturing Measurement Functios (Option) ...................................................... 1-5
What Is a Measurement Function? ............................................................................................... 1-6
Measurement Period..................................................................................................................... 1-6
2 Fundamental Measurement Conditions
Wiring System Settings (WIRING) ................................................................................................ 2-1
Wiring System (Wiring) ................................................................................................................. 2-1
Efciency Equation (η Formula) .................................................................................................... 2-4
Independent Input Element Conguration (Element Independent) ............................................... 2-5
Delta Computation (Δ Measure; option) ........................................................................................ 2-6
Selecting an Element Whose Measurement Range You Want to Specify (ELEMENT) ................ 2-8
Selecting All Input Elements (ALL)................................................................................................ 2-9
Voltage Range (RANGE UP/DOWN (V)) ...................................................................................... 2-9
Auto Voltage Range (AUTO (V)) ................................................................................................. 2-10
Current Range (RANGE UP/DOWN (A)) .....................................................................................2-11
Auto Current Range (AUTO (A)) ..................................................................................................2-11
Power Range .............................................................................................................................. 2-12
External Current Sensor Range (EXT SENSOR; option) ........................................................... 2-12
External Current Sensor Conversion Ratio (SENSOR RATIO; option) ....................................... 2-13
External Current Sensor Range Display Format (DIRECT/MEASURE; option) ......................... 2-14
Scaling (SCALING) ..................................................................................................................... 2-14
Valid Measurement Range (CONFIG(V)/CONFIG(A)) ................................................................ 2-16
Crest Factor (Crest Factor) ......................................................................................................... 2-17
Measurement Period (SYNC SOURCE) ..................................................................................... 2-18
Line Filter (LINE FILTER) ............................................................................................................ 2-19
Frequency Filter (FREQ FILTER) ............................................................................................... 2-19
Data Update Interval (UPDATE RATE) ....................................................................................... 2-20
Averaging (AVG) ......................................................................................................................... 2-20
Displaying the Setup Parameter List (INPUT INFO) ................................................................... 2-22
3 Harmonic Measurement Conditions (Option)
Harmonic Measurement Conditions (HRM SET) .......................................................................... 3-1
PLL Source (PLL Source) ............................................................................................................. 3-1
Measured Harmonic Orders (Min Order/Max Order) .................................................................... 3-2
Distortion Factor Equation (Thd Formula)..................................................................................... 3-3
Input Element Group (Element Settings) ...................................................................................... 3-3
Anti-Aliasing Filter ......................................................................................................................... 3-4