Tabel 4.3 Hasil Pengukuran pada Rangkaian Penguat Tegangan IC LM 324
Pin 1 0,009 Volt
Pin 2 0,041 Volt
Pin 3 0,01 Volt
Pin 4 4,96 Volt
Pin 5 2,21 Volt
Pin 6 2,22 Volt
Pin 7 3,87 Volt
Pin 8 3,86 Volt
Pin 9 2,19 Volt
Pin 10 2,22 Volt
Pin 11 0,00 Volt
Pin 12 2,42 Volt
Pin 13 2,33 Volt
Pin 14 3,86 Volt
4.4 Pengujian Tampilan Grafik Pengukuran Suhu dan Alarm Pada PC
Tampilan grafik suhu pada PC dibuat dalam bentuk visual basic dengan menggunakan bahasa C. Tampilan grafik akan berjalan apabila rangkaian sistem
sensor dihubungkan ke PC atau komputer server. Berikut adalah listing program untuk menampilkan grafik pengukuran suhu.
Dim Xd0 To 18000, Yd10 To 18000, Yd20 To 18000, Yd30 To 18000 As Integer
Dim TIMES0 To 18000 As String Dim j As Integer
Dim Temp, x, y2, y1, L1, L2, R, S, y10, y20, y30, x0, Data As Integer
Dim Sampling_Time As Single Dim oXL As Excel.Application
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Private Declare Function sndPlaySound Lib Winmm.dll Alias _
sndPlaySoundA ByVal lpszSoundName As String, ByVal uflags As Long As Long
Private Const snd_sync = H0 Private Const snd_Async = H1
Private Const snd_loop = H8
Private Sub Command4_Click Timer4.Enabled = True
Trace.Enabled = False Command7.Enabled = False
MSComm1.PortOpen = True x = 0
Timer5.Enabled = True Grids
Open C:\Data\ + Text5 + .DAT For Output As 1
End Sub
Private Sub Command5_Click sndPlaySound vbNullString, snd_Async
End Sub
Private Sub Command7_Click Timer3.Enabled = False
Set oXL = New Excel.Application Set oxlbook = oXL.Workbooks.Add
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FileName = C:\Data\ + Text5 + .xls
oxlbook.Worksheets1.RangeA1 = Time oxlbook.Worksheets1.RangeB1 = Temperature
oxlbook.SaveAs FileName For i = 2 To j
oxlbook.Worksheets1.RangeA i = TIMESi oxlbook.Worksheets1.RangeB i = Yd1i
Next i On Error GoTo 1
oxlbook.SaveAs FileName oxlbook.Close
1: End Sub
Private Sub Command1_Click Close 1
Line25.BorderColor = HFF0000 Line24.BorderColor = HFF
Line22.BorderColor = HFF0000 Grids
End Sub
Private Sub Command2_Click End
End Sub
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Private Sub Command3_Click If MSComm1.PortOpen = True Then MSComm1.PortOpen = False
Timer5.Enabled = False Timer4.Enabled = False
Trace.Enabled = True Command7.Enabled = True
Close 1 End Sub
Private Sub Timer4_Timer y1 = 6280 - Temp 10
Picture1.Line x0, y10-x, y1, QBColor12 R
x0 = x y10 = y1
x = x + 10
If Sampling_Time = Timebase 1 Then
Xdj = x Yd1j = Temp 2
TIMESj = Text1 j = j + 1
Sampling_Time = 0 End If
Sampling_Time = Sampling_Time + 1
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If x 12000 Then x = 0
x0 = 0 Q = 568
Grids End If
End Sub
Private Sub Timer5_Timer Dat = MSComm1.Input
If Dat Then If Data - Dat 20 Then
Text2 = Dat 2 Temp = Dat
Data = Dat
If Temp 2 100 Then alert = C:\ Windows \ media \ + notify.wav
sndPlaySound alert, snd_Async Or snd_loop End If
End If
End If
End Sub Private Sub Trace_Click
Timer4.Enabled = True
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Trace.Enabled = False Command7.Enabled = False
Read.Enabled = False Line25.BorderColor = HFF0000
Line24.BorderColor = HFF0000 Line22.BorderColor = HFF
MSComm1.PortOpen = True x = 0
Timer5.Enabled = True Grids
Open C:\Data\ + Text5 + .DAT For Output As 1 End Sub
Private Sub Form_Load With MSComm1
If .PortOpen = True Then .PortOpen = False .CommPort = 4
.Settings = 19200,n,8,1 .DTREnable = True
.RTSEnable = True .RThreshold = 1
.SThreshold = 0
End With R = 568
x = 0 x0 = 0
y10 = 6952 Data = 70
End Sub
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Private Sub Timer1_Timer Text1 = Time
End Sub
Private Sub Grids Picture1.Cls
Q = 568 For GRID = 1 To 17
Picture1.Line 0, Q-15000, Q, QBColor3 Q = Q + R
Next GRID
Q = 568 For GRID = 1 To 35
Picture1.Line Q, 0-Q, 10000, QBColor3 Q = Q + R
Next GRID
Picture1.Line 0, 7952-15000, 7952, QBColor9
End Sub
Private Sub Timer3_Timer Grids
Timer3.Enabled = False End Sub
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Setelah program dijalankan maka data pada sensor dikirim ke komputer server dalam bentuk grafik dan nilai. Dalam hal ini apabila pengukuran suhu melampaui batas
100
o
C maka alarm akan bunyi pada komputer server. Data pengukuran suhu dapat diamati secara real time dan dapat disimpan dalam format Microsoft excel.
Gambar 4.3 Tampilan Grafik Pengukuran Suhu
4.5 Perbandingan Pengukuran Suhu antara Alat dengan Alat Ukur Standar
