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Chapter 8. Servicing the PT878
190 Transport® Model PT878 Portable Liquid Flowmeter User’s Manual
8.10.3 Testing the Watchdog Timer Circuit
The PT878 includes a watchdog timer circuit. If a software error causes the
meter to stop responding, this circuit automatically resets the meter. A
properly functioning PT878 restarts if you run the Watchdog Test.
To start the Watchdog Test, scroll to the Watchdog Test option in the Test
Menu and press
[ENTER]. The screen appears similar to Figure 126 below.
Figure 126: Watchdog Test Screen
Press
[F2] (No) to cancel the test and return to the Menu screen, or press [F3]
(Yes) to start the test. The PT878 should go blank for a few seconds, and
then restart. If it does not follow this sequence, consult the factory.
Dew Point, °C
Signal, dB
-52.0
32
Pressure, PSIg
55.00
10.0
Run Time, Hours
Site Program Meter Logging Service
Units
Reports
Reference
MIS Probe
Factory Defaults
Flash Update
06
12
Factory Calibration
Test
X
No
Watchdog Test
Test Screen
Test Keys
Yes
** WARNING **
This test should automatically
restart your meter!
Press ‘Yes’ to start the test.
Press ‘No’ to cancel the test.
Watchdog Test
- TransPort® Model PT878 1
- Information Paragraphs 5
- Safety Issues 5
- Environmental Compliance 7
- Contents 10
- 1.1 Overview 17
- 1.1 Overview (cont.) 18
- 1.2 System Description 18
- 1.2.1 The Flowcell 18
- 1.3 Theory of Operation 20
- Chapter 2. Initial Setup 21
- • Transducers 22
- • Input/Output 22
- • Infrared Interface 22
- 2.1.1 Power Connections 23
- 2.1.2 Transducer Connections 23
- 2.2.2 Replacing the Batteries 26
- 2.2.3 Disposing of Batteries 27
- 2.3 Powering ON and OFF 28
- 2.4.1 Screen 31
- 2.4.1 Screen (cont) 32
- 2.4.2 Keypad (cont.) 34
- T] key to reach the 45
- T] or [S] 47
- X] key to scroll down by 47
- [ENTER].)The 53
- [F3] (OK).The 55
- • Traverses 56
- • Spacing 56
- [ENTER]. The screen appears 58
- 3.8 Entering Analog Inputs 66
- Analog Input 66
- Cancel OK 67
- Analog Output 70
- • Forward Totalizer 74
- • Reverse Totalizer 74
- • Forward Energy 74
- • Reverse Energy 74
- 3.11 Entering User Functions 77
- Figure 38: Site Menu 87
- 4.1 The Site Manager 88
- Figure 40: Site Manager Menu 89
- 4.1 The Site Manager (cont.) 90
- 4.1.1 Creating a New Site 90
- 4.1.3 Saving a Site 93
- 4.1.7 Deleting a Site 96
- 4.1.8 Creating a Site Message 97
- 4.1.9 Printing a Current Site 99
- [ENTER] 100
- Figure 51: QuickBeam Window 101
- Figure 54: Wireless Link Icon 103
- 4.1.13 Listing Files by Name 104
- E0: No Errors 105
- [SEL] from the Operate 105
- [SEL] enables 105
- [ENTER] button opens the 105
- 5.1 The Format Option 106
- T] or [S] key 106
- Velocity, ft/s 108
- Delta-T, ns 108
- Volume, l/s 108
- Signal, dB 108
- 5.3 The Limits Option 109
- 5.4 The Measurement Option 111
- Configure FKey 116
- Velocity, m/s 117
- Gain, dB 117
- 1. Press [MENU] 118
- [ENTER]. The 119
- [F2] (Refresh) 123
- 5.6.4 Deleting a File 124
- 5.6.5 Listing Files by Name 125
- [F2] (Next) 126
- [ESC] or [F3] (Exit) 126
- 6.3 The Battery Charger 130
- 6.4 Entering Date and Time 131
- [F3] (OK). The 135
- [F2] (Cancel) 135
- 6.6 Adjusting the Contrast 136
- W] key to move to 136
- Vitesse, m/s 139
- W] and [X] keys to scroll to 140
- 6.11 Setting Up User Tables 143
- Chapter 7. Logging Data 147
- 7.2 The Log Manager 149
- W] and [X] keys 149
- 7.3 The File Menu 150
- 7.3.1 Setting up a New Log 151
- Select Measurement 155
- 7.3.3 Renaming a Log 157
- 7.3.4 Deleting a Log 157
- 7.3.4 Deleting a Log (cont.) 158
- 7.3.5 Deleting All Logs 158
- 7.3.7 Printing a Log 159
- 7.3.7 Printing a Log (cont.) 160
- 7.4 The Log Menu 161
- 7.4.2 Restarting a Log 162
- 7.4.3 Ending a Log 162
- 7.4.4 Stopping All Logs 163
- 7.4.5 Restarting All Logs 163
- 7.4.6 Ending All Logs 163
- 7.4.7 View All Sites 163
- 7.5 The View Menu 164
- 7.5.1 Displaying Log Details 165
- 7.6 The Sort Menu 170
- 7.6.1 Listing Logs by Name 170
- 8.2 Printing Reports 173
- 8.2 Printing Reports (cont.) 174
- X] arrow key 176
- [F2] (Out) to zoom out fully 180
- W] or [X] 181
- T] arrow key and then 185
- 8.7.2 Calibrating Inputs 192
- • Transmit Sample Size 194
- Errors Allowed 194
- 8.9 Setting Error Limits 200
- 8.10.1 Testing the Screen 204
- 8.10.2 Testing the Keys 205
- Dew Point, °C 206
- Pressure, PSIg 206
- Run Time, Hours 206
- Stop Exit 207
- 8.10.7 Testing the Battery 209
- 8.12 Updating PT878 Software 211
- 6. You now have two options: 213
- 8.12.2a Setting up the PC 214
- • Transducers and cables 219
- 9.1 Error Code Messages 220
- Soundspeed 222
- 9.3 Flowcell Problems 224
- 9.3.1 Fluid Problems 224
- 9.3.2 Pipe Problems 225
- 9.4 Transducer Problems 226
- 3. INTERNAL DAMAGE 227
- 4. PHYSICAL DAMAGE 227
- 1. POOR COUPLING TO PIPE 227
- 2. MISALIGNMENT 227
- 9.4.3 Relocating Transducers 228
- Chapter 10.Specifications 229
- 10.2 Electrical 230
- Chapter 10. Specifications 231
- 10.4 Transducer 233
- 10.5 Pipe Size and Material 233
- 10.6 Available Options 234
- Program Meter Logging Service 235
- Appendix A. Menu Maps 236
- Figure 138: Site Menu 237
- Figure 140: Meter Menu 239
- Figure 141: Logging Menu 240
- Figure 142: Service Menu 241
- Figure 143: Transducer Option 243
- Figure 144: Lining Option 244
- Figure 145: Fluid Option 245
- Figure 146: Path Option 246
- Figure 147: Energy Option 247
- Pipe Thickness 255
- Pipe O.D 255
- • the wall thickness (WT) 256
- • the mounting angle (MA) 256
- • inside diameter (ID) = 48” 257
- • wall thickness (WT) = 3/8” 257
- • mounting angle (MA) = 45° 257
- C.2 Mounting RTDs on the Pipe 260
- • a screw buckle 260
- • a feeder buckle 260
- Operation 265
- E.1 Product Identification 269
- E.2 Hazardous Ingredients 269
- E.3 Physical Data (nominal) 270
- E.5 Reactivity Data 270
- E.8 Control Measures 272
- Appendix G. Glossary 275
- Warranty 291
- Return Policy 292
- GE Infrastructure 293
- Customer Support Centers 297
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