YOKOGAWA WT1800 User Manual

iv
IM WT1801-01EN
Contents
8 Computation
Computation (MEASURE) ............................................................................................................ 8-1
User-Dened Functions (User Dened Function) ......................................................................... 8-1
Measuring the Average Active Power ........................................................................................... 8-5
MAX Hold (Max Hold) ................................................................................................................... 8-5
User-Dened Events (User Dened Event) .................................................................................. 8-6
Apparent Power, Reactive Power, and Corrected Power Equations (Formula) ............................ 8-8
Sampling Frequency (Sampling Frequency)................................................................................. 8-9
Phase Difference Display Format (Phase) .................................................................................. 8-10
Master/Slave Synchronization Measurement (Sync Measure) ................................................... 8-10
Voltages or Currents Whose Frequencies Will Be Measured (FREQ MEASURE) ......................8-11
9 Integrated Power (Watt hours)
Integration-Related Display Indications ........................................................................................ 9-1
Number of Displayed Digits (Display Resolution) ......................................................................... 9-2
Enabling or Disabling Independent Integration (Independent Control) ......................................... 9-4
Independently Integrated Elements (Element Object) .................................................................. 9-4
Starting, Stopping, and Resetting Integration (Start/Stop/Reset) ................................................. 9-5
Integration Conditions (Integ Set) ................................................................................................. 9-7
Integration Mode (Mode)............................................................................................................... 9-7
Integration Timer (Integ Timer).................................................................................................... 9-10
Scheduled Times for Real-Time Integration (Real-time Control) ................................................ 9-10
Integration Auto Calibration On/Off (Auto Cal) .............................................................................9-11
Watt Hour Integration Method for Each Polarity (WP ± Type) ......................................................9-11
Current Mode for Current Integration (q Mode) ...........................................................................9-11
Rated Time of Integrated D/A Output (D/A Output Rated Time; Option) ..................................... 9-12
10 Waveform Display
Waveform Display (WAVE) ......................................................................................................... 10-1
Display Format (FORM) .............................................................................................................. 10-2
Number of Windows (Format) ..................................................................................................... 10-2
Time Axis (Time/div) .................................................................................................................... 10-2
Vertical Axis (Amplitude) ............................................................................................................. 10-4
Trigger (Trigger Settings) ............................................................................................................ 10-5
Advanced Waveform Display Settings (Display Settings) ........................................................... 10-7
Waveform Mapping (Wave Mapping) .......................................................................................... 10-8
Display Item (ITEM) .................................................................................................................... 10-8
11 Trend Display
Other Displays (OTHERS) ...........................................................................................................11-1
Trend Display (Trend) ..................................................................................................................11-1
Display Format (FORM) ...............................................................................................................11-2
Display Item (ITEM) .....................................................................................................................11-3
12 Bar Graph Display (Option)
Bar Graph Display (OTHERS (Bar)) ........................................................................................... 12-1
Display Format (FORM) .............................................................................................................. 12-1
Display Item (ITEM) .................................................................................................................... 12-2

YOKOGAWA WT1800 Specifications

General

Model	WT1800
Basic Power Accuracy	±0.1% of reading
Frequency Range	DC, 0.1 Hz to 1 MHz
Harmonic Analysis	Yes, up to 500th order
Voltage Range	1.5 V to 1000 V
Current Range	0.5 A to 50 A
Display	8.4-inch LCD
Interfaces	USB, Ethernet, GP-IB
Sampling Rate	2 MS/s
Dimensions	426 mm x 177 mm x 400 mm