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Contents
10 OPERATION ........................................................................................ 134
Measuring values and parameters ............................................................ 135
10.1
10.1.1 Input protection for parameters ....................................................................... 135
10.1.2 Parameter and measuring values with variable units ..................................... 135
10.1.3 Calibration and Service Switch ....................................................................... 136
IV
10.1.4 Interfaces to converters and controllers .......................................................... 136
10.1.5 Interface for service and parameterization ...................................................... 137
10.1.6 Adaptation of the DZU protocol to ERZ 2400 ................................................. 138
10.2
139
10.2.1 Calling up the value of a parameter ................................................................ 140
10.2.2 Entering data ................................................................................................... 141
10.2.3 Changing the parameters of protection E and S ............................................. 144
Parameterize the USM interface ................................................................. 149
10.3
10.3.1 Interface 0 ....................................................................................................... 149
10.3.2 Interface 1 ....................................................................................................... 150
10.3.3 Interface 2 ....................................................................................................... 150
Modbus communication in detail .............................................................. 161
10.4
10.4.1 Codes supported ............................................................................................. 161
10.4.2 Data types ....................................................................................................... 161
Configuration of the current output .......................................................... 163
10.5
List of the measurement values and parameters ................................. 163
10.6
11 MAINTENANCE .................................................................................. 164
Maintenance schedule ................................................................................. 165
11.1
Checking the device for leaks .................................................................... 165
11.2
Checking the device for any signs of damage ....................................... 166
11.3
Changing the battery .................................................................................... 166
11.4
Changing the transducer ............................................................................. 166
11.5
Changing the ultrasonic electronics ......................................................... 167
11.6
Cleaning the device ...................................................................................... 167
11.7
Check the official seal .................................................................................. 168
11.8
Decommissioning and disposal ................................................................ 168
11.9
12 ALARM AND WARNING MESSAGES ........................................... 170
Alarm messages ............................................................................................ 171
12.1
Warning messages ........................................................................................ 172
12.2
Manual USM GT400 · EN10 · May 2021
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