WT230 get wh

[st168]

I use Labview to get voltage, current, power and wh from WT230 by using RS232. I can get the data of voltage, current and power, but it can not work in "wh". Can you suggest any method? or provide vi to me? thank you.

[Charles.Tac]

Hi st168,

Would you please provide more detial about your problem?

1. Have you use the "Configure Measruement Normal.vi" and set the "Measure Item" to Wh?

2. Have you got any error when read the measurement of Wh?

Thanks,

Charles

[st168]

Hi Charles,

I download the driver from

http://sine.ni.com/apps/utf8/niid_web_display.model_page?p_model_id=1805

I select Plug and Play (project-style) and run the sample vi from the above link.

I can get the V, A and W from the sample vi but I cannot get the wh. It's no error message and return a error reading, for example 0.999xe-6.

I have used "Configure Measruement Normal.vi" and set the "Measure Item" to Wh. Also send "START" comment to WT230, for example "INTEGrate:START".

Please give me a suggestion.

Thank you.

Sylvia

[Billingsley]

您可能要到 VI 底層檢查詳細的原因

NI 並不保證每一個 VI 都可以執行

[x35]

那是因為WT210&WT230它是要用加入那個測試選項   你去下Measure:Value?    它就會回你 你需要的值

你都沒下命令去新增的話  它就只會回你   Vin Iin Pin的值

[st168]

Hi X35,

I have add wh in the example of measure value. But it returns error data. Do you have any suggestion?

[x35]

我沒用過Labview    我是用vb去寫的

如我要加入PF  

"MEASUER:NORMAL:ITEM:PF:ELEMENT1 ON"

我之前有試過其它的 都是正確的

[st168]

Hi x35,

When you write the vb, does it need to set the START key for wh? if yes, how to set? thank you.

[x35]

看不懂你的start key 是什麼

可是labview也只是提供一個介面  送出的gpib的command一定是一樣的

我也是看wt210的 manual 去send command

[st168]

Hi x35,

when measure "wh", energy, it's in terms of time kWh. If you use the equipment to direct measure, it needs to press the "START" key before the measurement. The equipment will measure the energy in terms of time. After you press the "STOP" key, the equipment stop the measurement. for example after 1 h press the "STOP" key, that means the equipment measure the energy in 1 h.

So why I want to know how to set the "START" key when write the Labview?