WT200 Digital Power Meter (253421) (DISCONTINUED)
Notice: This product was discontinued on Mar 1, 2003.
Overview:
To change the voltage range on element 1 to the 30 V range, send the "RV4" command to the measuring instrument.To change the current range on element 1 to the 1 A range, send the "RA5" command to the measuring ...
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To change the voltage range on element 1 to 30 V, send the "CONFIGURE:VOLTAGE:RANGE 30V" command to the measuring instrument.To change the current range on element 1 to the 1 A range, send the "CONFIGURE:CURRENT:RANGE ...
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The waveform may actually not be a pure sine wave. Even though a 50/60 Hz sine wave is expected, the following factors may be involved:
The waveform is slightly distorted (harmonic components are mixed in)
Small ...
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Check the "Sync Source" and zero cross filter (frequency filter) settings. For the WT3000, "Sync Source" setting is irrelevant if the data update rate is 250 ms, 500 ms, 1 s, or 2 s.
Sync Source SettingIn principle, if ...
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Check for differences in the specifications or features of the instruments.
For values that do not match when inputting a 50/60 sine wave
Check whether the value is within the specifications (error) of each power ...
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You can use the "STATUS:ESSR?" command to access the extended event register and determine whether the data was updated. You can judge the data update status by referencing bit 0 (UPD) of this register. However to do ...
FAQ
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You can determine whether data was updated by performing a serial poll and referencing the status byte.Bit 0 of the status byte (D101) changes to 1 when data is updated. When bit 0 changes to 1, bit 6 (D107) also ...
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NO, you should not use the instrument with both the direct input and external sensor terminals wired. Doing so will put the user at risk of electric shock and could damage the instrument. This is because the ...
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Send the appropriate command as shown below to your instrument, then read in all the data that is returned. PZ4000: "NUMERIC:NORMAL:VALUE?" WT1600: "NUMERIC:NORMAL:VALUE?" WT100/200 series ...
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Send the "OF1,1,1" commandThis command sets the voltage value (V) from element 1 to output to channel 1 (from among the 14 output channels), and causes the voltage of element 1 to be read out.
In the same manner, make ...
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Send the "MEASURE:NORMAL:ITEM:PRESET:CLEAR" command to the measuring instrument. This command turns all items for output OFF. Therefore no items will be output if you send the "MEASURE:NORMAL:VALUE?" command.
Send the ...
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The measurement intervals of the measured I/O data must overlap exactly. Check the sync source setting.
For example, route the input to a three-phase device under measurement to input elements 1-3 on the power meter, ...
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Check for differences in the specifications or features of the instruments.
For values that do not match when inputting a 50/60 sine wave
Check whether the value is within the specifications (error) of each power ...
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This is to prevent an open current circuit. Among non-Japanese power meters, there are products that also use safety terminals for current terminals. Safety terminals can be said to be safe because the terminal is not ...
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The input terminals on all Yokogawa power meteras are located on the rear panel. This takes into account safety when handling the measuring instrument.
The signal input to the power meter normally carries high ...
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There are restrictions of the DSP hardware.
WT230 and WT210 are low-cost power meters.
So, a low-cost, modest performance DSP utilized.This DSP has slow calculation.
WT3000 is performing complicated ...
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The Urms and Umn values can be simultaneously read and retrieved using communication commands, only if the instrument is in WT300 IEE 488.2 mode. The WT300 has two communication command modes:IEE 488.2 in WT210/WT230 ...
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You can not use LabVIEW and WTviewer to communicate with the PC using same USB driver. The USB driver for LabVIEW and the USB driver for WTviewer is different.
Yokogawa's YKMUSB driver is used by WTviewer ...
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Check the Synch Source and Frequency Filter settings
When a single-phase signal being measured fluctuates around power factor of 1.Slight fluctuations in the measured values of voltage, current, and power can cause a ...
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The following may be causing the problem.
5V may have occurred during rating. Check the range setting again.
DA output error can affect the values when the input is smaller than the rating.
Have you checked the error ...
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In the case of three-phase three-wire, or 3V3A wiring, the power, power factor, and phase angle of each input element do not match because it is the line to line voltage that is measured.
Please download and refer ...
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In the three-phase three-wire, or 3V3A wiring scheme, the phase angle of voltage and current input to each input differs from that of the actual load because it is the line to line voltage that is measured.
In ...
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The peak value and crest factor may be unstable if they have not been captured accurately. If the peak value is not stable, neither will the crest factor be stable. The cause is the difficulty in capturing the narrow ...
FAQ
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The difference in measurement values can be attributed to the difference in calculation methods for normal mode and harmonic mode.
The voltage, current, and power in normal mode are displayed as the total of the ...
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The frequency display and D/A output can handle only one input element at a time, either the voltage or the current. When either the V Hz or A Hz display function indicators are lit in display C, the frequency ...
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This error occurs when the PLL source frequency is outside of the measurement range. The measuring frequency range for the PLL source is 40 Hz to 440 Hz. You can select voltage or current for the PLL source. Select a ...
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The part numbers for the 2 piece screws in the WT210 Rack Mount Kit (751533-E2) are listed below:
Y9414LB: Binding-head screw (M4, 14mm long)
Y9414EB: Flat-head screw (M4,14mm long)
If you wish to purchase the screws ...
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Yes, if the instrument is in auto-range, zero level correction will still be executed.
FAQ
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When making a WT230 RS232C connection using GateWT, please verify the following RS232C communication settings on the instrument: Mode = 488.2 Hand = 0 For = 0 Baud Rate = 9600 Terminator Cr+Lf Even though you can run ...
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The part numbers for the black current knobs and pads (studder) is listed below:
A9105ZG: Black Current Knob Set of 2
B9292GX: Pad (Studder) Set of 10
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The D/A output of the WT230 uses a 24-Pin Centronics type connector. For additional informating regarding the 24-Pin Centronics Connector, please refer to the attached PDF and click on the link below.
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The WT3000 D/A output terminal is electrically isolated from the case. For all other models, the D/A output terminal is connected to the case.
FAQ
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"Zero level correction" is performed only when the setting initialization accompanies one of the following change.
Switching normal measurement/harmonics measurement.
Switching the voltage range.
Switching the current ...
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There are several items you will need to check and verify to solve this issue.
Verify the GP-IB connectionSome instruments have a D/A output connector located next to the GP-IB connector. There have been some ...
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Please refer to the attached Excel spreadsheet for complete information regarding the RS232 cable pinouts used with by the WT & PZ Series Power Analyzers.
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If the HOLD button was pressed when the WT210 was powered OFF, it causes the WT210 to display "-----" on the next time it is powered ON. You can revert back to a numerical display simply press the HOLD button.
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The value depends on the model of the power analyzer.
For WT1000, WT2000, WT100, and WT200, it is fixed to the fundamental wave. For power analyzers with 7 segments LED, the relative harmonic content is fixed to the ...
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You can read the average active power during continuous integration mode (just before the integral resets) for the WT230, by monitoring the status of the ITG or ITM bits of the extended event register.
Bit 1 ITG is ...
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Although WTViewer is not officially supported under the Linux environment, users have successfully done so using WINE (flavor of Linux) via RS232. For connectivity to WT210/WT230, WTViewer requires that the meter be set ...
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The output resolution of the D/A option for the WT100/WT200 series is 12-bits.
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The maximum response time during normal measurement is 0.5s, which is the display update interval x 2.
FAQ
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With RS232C, the response time depends on settings other than the communications speed. An actual measurement example is given below at 1 byte=10 bits (start bit: 1 bit, data: 8 bits, stop bit: 1 bit, no parity) with a ...
FAQ
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Yes, the setting values will be stored in internal memory if the instrument has firmware version 1.21 or later. You can check the version in the opening message when you first turn the power ON.
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The following product tutorial guides have been created for the WT and PZ Series Power Meter and Analyzer instruments and are available for download. Each tutorial contains quick and easy steps to help you get started ...
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If you want to know the condition of the "Check Range" LED indicator for voltage and current, you will need to read three bits in the Extended Event Register. "Bit-6", "Bit-7", and "Bit-8" needs to be read to know the ...
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It is possible to lock out all the keys, including LOCAL, on the WT210/WT230 using a GPIB specific or controller specific command.For the GPIB controller from National Instruments, the command is called LLO or Local ...
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No, it is not possible to change the maximum number of harmonic orders when calculating THD. On the WT210/WT230, the THD values are calculated based on 50 orders. To calculate THD on the WT210/WT230, there are two ...
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Please download the attached PDF file for a list of pinouts for various communication cables.
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Although Yokogawa does not have any official recommendation for USB to Serial converters, it is possible to use some USB to RS232 DB9 Adapter Cables. If you choose to use a laptop PC without RS232C port, please use ...
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Yes, the WT210 will meet or exceed all requirements set by the Energy Star guideline. Please see the attached documents for more details.