34420A测量误差大小与什么有关？

您好我对这个 论坛的新用户我遇到万用表34420A的问题我首先用万用表上的显示器进行阻抗读数，然后使用GPBI端口用excel进行相同的电阻测量，我得到差不多20％的误差
这是否意味着我的编程代码错误或数字界面与它有关？我的代码：Private Sub cmdSingleReading_Click（）delay 1000'在活动单元格中放置一个读数Dim Address As String Address = Agt3494A1.Address If
Len（地址）地址=“GPIB0 :: 22”Agt3494A1.Address =地址结束如果txtAddress.Text =地址Dim结果为Double Agt3494A1.Output“Read？”
Agt3494A1。输入结果Dim contador As Double contador = Cells（2001,1）+ 1 Cells（contador，1）.Value = result End SubThanks提前



以下为原文

Hi im new to this forum
I'm having a problem with a mul timeter 34420A I first take a resistence reading with the display on the multimeter and then I take the same resistance measurement with excel using the GPBI port and I get an error of almost 20% does this means something on my programing code is wrong or the digital interface has something to do with it?

My code:

Private Sub cmdSingleReading_Click()
delay 1000
' Places a single reading in the Active cell
Dim Address As String

Address = Agt3494A1.Address
If Len(Address) < 4 Then ' no address
Address = "GPIB0::22"
Agt3494A1.Address = Address
End If

txtAddress.Text = Address
Dim result As Double

Agt3494A1.Output "Read?"
Agt3494A1.Enter result
Dim contador As Double
contador = Cells(2001, 1) + 1
Cells(contador, 1).Value = result

End Sub

Thanks in advance