How do I Retrieve Specific Items From the PZ4000 and WT1600 Using the Communications Commands?

  1. Send the "NUMERIC:FORMAT:ASCII" command 
    This sets the data format for the data you want to read out. Measured data read out using the "NUMERIC:NORMAL:VALUE?" command is output as an ASCII string.
  2. Send the "NUMERIC:NORMAL:CLEAR:ALL" command
    This command turns all items for output OFF. Therefore no items will be output if you send the "NUMERIC:NORMAL:VALUE?" command.
  3. Send the "NUMERIC:NORMAL:ITEM1 URMS" command. This command sets item 1 of the data that is output using "NUMERIC:NORMAL:VLAUE?" to element 1's voltage RMS value (Urms) output.
  4. Send "NUMERIC:NORMAL:ITEM2 IRMS,1", and "NUMERIC:NORMAL:ITEM3 P,1" to set the second and third data to the current RMS value (Irms) and power value (P) output.
  5. Send the "NUMERIC:NORMAL:VALUE?" command.
    This command will set the number of parameters to be read out. 

For example, if you want to read out the values for Urms, Irms, and P, send the "NUMERIC:NORMAL:VALUE?" command. The reply would be 3 data outputs as shown below.            

             Example Output:4.083E+00,50.002E+00,202.65E+00

The output items, using the "NUMERIC:NORMAL:ITEM" command, of Urms, Irms, and P are set to the 1st, 2nd, and 3rd data respectively. The first data is Urms=4.083E+00, the second data is Irms=50.002E+00, and the last data is P=202.65E+00 for element 1.

In the above procedure using "NUMERIC:NORMAL:ITEM" you set each output item individually, but you can also specify all output items at once using a preset pattern. There are 4 preset patterns that can be used. For example, to use preset pattern, send the "NUMERIC:NORMAL:PRESET1" command to the measuring instrument.

You can also use preset pattern 1 to output Urms, Irms, and P by sending the following 4 commands in order to the measuring instrument.

        "NUMERIC:FORMAT ASCII"
        "NUMERIC:NORMAL:PRESET 1"
        "NUMERIC:NORMAL:NUMBER 3"
        "NUMERIC:NORMAL:VALUE?"

When using a preset and there are a large number of items to be output, first, choose the closest preset pattern, then add a "NUMERIC:NORMAL:ITEM" command for each remaining item.


For more information on preset output item patterns, please refer to the following manuals:

  • PZ4000 Power Analyzer Communications Interface User's Manual Page 4-66 to 4-67
  • WT1600 Digital Power Analyzer Communications Interface User's Manual Page 4-70 to 4-71

Related Products & Solutions

PZ4000 Power Analyzer

The PZ4000 is designed for High Frequency Power Measurements as well as Transient Power Measurements. Its real-time acquisition system can perform cycle-by-cycle power measurements. One to Four input elements offer Basic Power Accuracy of 0.2% with 2 MHz Bandwidth and 5MS/sec digitizing rates.

WT1600 Digital Power Meter

The High-end WT1600 is designed for a wide range of applications, from energy-saving to large load applications. The WT1600 has a six element input capability to provide maximum flexibility, and Basic Power Accuracy of 0.1% with 1 MHz Bandwidth.

Power Analyzers and Power Meters

Measure characteristics of devices that generate, transform or consume electricity. Also called power meters or wattmeters, these devices measure parameters such as true power (watts), power factor, harmonics, and efficiency.

 
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