Pasco Xplorer-GLX Users’ Guide Manuel d'utilisateur Page 79
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Xplorer GLX Users’ Guide 73
One-Point Offset In a one-point offset calibration, you reset only one point.
The line shifts so that it intersects the new point, but its slope does not change.
One-point slope calibration; the line shifts to intersect the new point
Offset calibration is usually used to make one sensor agree with another sensor.
The graph below on the left shows the measurements from two temperature
probes in the same container of water. Due to normal variation among probes, the
second probe consistently reads about 0.08 °C higher than the first probe. Nor-
mally this difference would be insignificant; however, an offset calibration can
be used to bring the sensors into closer alignment. See “One-Point Offset Cali-
bration or Multiple-Measurement Alignment Procedure” on page 77 for step-by-
step instructions.
Navigating in the Calibration Dialog Box
For step-by-step instructions on the calibration procedure, see page 75.
The Calibration dialog box contains a list of fields that are used to select the mea-
surement (or measurements) to be calibrated, and to enter the parameters of the
calibration. One of the fields is always highlighted. Use the up and down arrow
keys to move the highlight to a different field.
You will sometimes see an up or down arrow ( or ) near the bottom of the
dialog box indicating that more fields are available, but not currently visible.
When you see the up arrow displayed on the screen, you can press the up arrow
key on the keypad multiple times to make more fields visible. When you see the
down arrow displayed on the screen, you can press the down arrow key to make
more fields visible.
new
point
old
calibration
new
calibration
Input Data
Output Data
line shifts
Before offset calibration After offset calibration
One measurement
is shifted to align
with other
measurement
- Users’ Guide 1
- About this Guide 2
- Technical Support 2
- How to Store the 3
- Contents 5
- Introduction 9
- Included Equipment 10
- Quick Start 11
- Overview of the GLX 12
- Shutting Down 13
- The Record Button 14
- Home Screen 15
- Bottom Row 16
- 12 Overview of the GLX 18
- Chapter 1: Displays 19
- Active Fields 20
- Choosing Data to Display 21
- Data Cursor and Coordinates 22
- Graph Function Keys 22
- Scale and Move with a Mouse 23
- F3 Tools Menu 23
- F4 Graphs Menu 28
- Data Annotation 31
- Annotation Menu 32
- Note Editor Dialog Box 33
- To Open the Table 34
- Table Scrolling 35
- Table Function Keys 35
- F2 Edit Cell 36
- F4 Tables 37
- Manually Entered Data 38
- Editing an Existing Data Set 40
- Xplorer GLX Users’ Guide 35 41
- 36 Table 42
- Digits Display 43
- To Open the Meter Display 44
- Auto Scale and Reset 44
- Chapter 2: Utility Screens 45
- Output Settings 46
- Calculator 47
- Algebraic Calculations 48
- Graphing Equations 50
- Sensor-based Calculations 51
- Calculation 52
- Calculator Function Keys 54
- F2 [Data] 55
- F3 Graph 55
- Output-control Calculations 56
- Special Functions 57
- Output-control Functions 57
- Logic Operators and Functions 58
- Audio Temperature Indicator 58
- Notes Screen 59
- Stopwatch 60
- Chapter 3: Settings and Files 61
- Sensor Settings 62
- Sensors Function Keys 63
- F3 Microphone 64
- ScienceWorkshop 65
- Manual Sampling Mode 66
- Timing Screen 68
- Constants 69
- Measurements 69
- Working with Multiple Timers 70
- Timing Screen Function Keys 70
- Digital Adapter Options 73
- 68 Timing Screen 74
- Data Properties 75
- Calibration 77
- For step-by-step 78
- After offset calibration 79
- 74 Calibration 80
- Calibration Procedures 81
- 76 Calibration 82
- Data Files Screen 84
- Navigating in the File List 85
- Data Files Function Keys 86
- Move or Copy File 87
- RAM and Flash 88
- File Size Limits 88
- File Transfer 89
- Backup and Restore GLX Files 89
- GLX-to-GLX File Transfer 90
- Settings Screen 91
- Language Options: 92
- Settings Screen Function Keys 93
- 88 Settings Screen 94
- Data Source Menus 95
- Multipress Text Input Mode 96
- Using a USB Keyboard 96
- Scientific Notation 97
- Printing 97
- 92 Printing 98
- Operation 99
- GLX Storage 100
- Battery Disconnection 100
- Battery Capacity 101
- Resetting 102
- Operating Temperature 103
- 98 Operating Temperature 104
- GLX with DataStudio 105
- Transferring Files 106
- File will be uploaded to 107
- 102 GLX with DataStudio 108
- GLX Simulator 109
- Screen Capture 110
- Screen Mirroring 110
- Sample Activities 111
- Activity 1: Calorimetry 113
- Analysis 114
- Xplorer GLX Users’ Guide 109 115
- 110 Calorimetry 116
- Background 117
- Before You Begin 117
- Procedure 118
- Data Collection 123
- 120 Newton’s Law of Cooling 126
- Variation 127
- GLX Set-Up 130
- Place the dashed box 135
- 134 Capacitor Discharge 140
- Interference 141
- Activity 10:Beat Frequency 143
- 140 Beat Frequency 146
- Shortcut Summary 149
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