Contents
September, 4th 2018 Ultrasonic Flowmeter USM GT400 II
1 About this manual
1.1 Objective of the manual ........................... 1
1.2 Specialized knowledge required .............. 2
1.3 Abbreviations ........................................... 2
1.4 Symbols ................................................... 3
1.5 Validity of the manual .............................. 3
2 Brief instructions
2.1 Mechanical connection ............................ 5
2.2 Electrical connection................................ 6
2.3 Start Up.................................................... 7
2.4 Earthing ................................................... 7
2.5 Parameter setting .................................... 8
3 Device overview
3.1 Main components .................................... 9
3.2 Ultrasonic electronics............................. 11
3.3 Arrangement of the
ultrasonic transducers............................ 15
4 Functional principle - Ultrasonic flow
measurement
4.1 General description................................ 17
4.2 Correction of the base line..................... 21
4.3 Diagnostic function Speed of Sound...... 24
4.4 Import of gas composition data.............. 27
4.5 Batch mode............................................ 36
5 Safety
5.1 Intended use .......................................... 37
5.2 Layout of instructions............................. 38
5.3 Qualification of the personnel ................ 39
5.4 Safety instructions ................................. 39
5.5 Responsibilities of the operator ............. 46
6 Transport and storage
6.1 Transport ............................................... 47
6.2 Packing the device for transportation .... 55
6.3 Storage .................................................. 62
7 Construction and Planning
7.1 Connection flanges ................................ 65
7.2 Seals...................................................... 66
7.3 Screws ................................................... 70
7.4 Installation possibilities .......................... 71
7.5 Flow computer ....................................... 75
8 Installation
8.1 Assembly work preparations ................. 78
8.2 Installation of the device........................ 80
8.3 Connecting the device electrically ......... 84
8.4 Installing the pressure connection ....... 112
8.5 Outdoor installation.............................. 114
9Start Up
9.1 Comparing meter parameters.............. 115
9.2 Checking functions of the USM ........... 115
9.3 Reading out speed of sound................ 116
10 Operation
10.1 Measuring values and parameters ...... 118
10.2 Calling up and changing the parameters
via the ultrasonic electronics ............... 121
10.3 Parameterize the USM interface ......... 131
10.4 Modbus communication in detail ......... 141
10.5 List of the measurement values and
parameters .......................................... 143
11 Maintenance
11.1 Maintenance schedule......................... 146
11.2 Checking the device for leaks.............. 146
11.3 Checking the device for any signs of
damage................................................ 147
11.4 Changing the battery ........................... 147
11.5 Changing the transducer ..................... 147
11.6 Changing the ultrasonic electronics..... 148
11.7 Cleaning the device ............................. 148
11.8 Check the official seal.......................... 149
11.9 Decommissioning and disposal ........... 149
12 Alarm and warning messages
12.1 Alarm messages.................................. 151
12.2 Warning messages.............................. 154
12.3 Notes ................................................... 157
12.4 Troubleshooting................................... 157
13 Technical specifications
13.1 Performance data................................ 160
13.2 Approved gas types ............................ 160
13.3 Approved measuring range according
to MID.................................................. 161
13.4 Type plate............................................ 162
13.5 Weights and dimensions ..................... 163
