Velocity Edge DualX Service Manual Page 13

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Reference, Installation, and Operations Manual Table of Contents
3-9000-743 Rev U August 2014
Contents v
6.1.14 Seniorsonic flow characterizations ................................................................... 205
6.1.15 Flow-condition pressure and temperature........................................................ 206
6.1.16 Gas properties.................................................................................................. 210
6.1.17 AGA8 compressibility calculations.................................................................... 215
6.2 Frequency, digital, and analog outputs ......................................................... 215
6.2.1 Frequency outputs ........................................................................................... 215
6.2.2 Digital outputs ................................................................................................. 219
6.2.3 Analog (Current) output................................................................................... 221
6.3 Digital Input ............................................................................................... 225
6.4 Modbus communication .............................................................................. 226
6.4.1 Mapping data points to Modbus Registers........................................................ 226
6.4.2 Log record access............................................................................................. 227
6.5 Optional gas chromatograph interface ......................................................... 227
6.5.1 Hardware configuration ................................................................................... 228
6.5.2 Software configuration..................................................................................... 228
6.5.3 Gas property data............................................................................................. 228
6.5.4 Data polling...................................................................................................... 229
6.5.5 GC data validity ................................................................................................ 230
6.5.6 GC alarm handling............................................................................................ 230
6.6 Archive logs ............................................................................................... 231
6.6.1 Daily log ........................................................................................................... 231
6.6.2 Hourly log ........................................................................................................ 236
6.6.3 Audit log .......................................................................................................... 239
6.6.4 Alarm log ......................................................................................................... 250
6.6.5 System log ....................................................................................................... 253
6.6.6 Reading log records.......................................................................................... 253
6.7 Viewing transducer waveforms .................................................................... 255
6.8 Upgrading the meter program ..................................................................... 255
6.8.1 Power disruption during firmware upgrade ...................................................... 256
6.9 Self-tests and data reliability ....................................................................... 258
6.9.1 RAM integrity ................................................................................................... 258
6.9.2 Program integrity............................................................................................. 258
6.9.3 Stored data integrity ........................................................................................ 258
6.9.4 Hardware watchdog......................................................................................... 258
6.9.5 Program execution integrity............................................................................. 258
6.9.6 Log transfer integrity........................................................................................ 259
6.9.7 Data value limit checks..................................................................................... 259
6.9.8 Configuration dependency checks ................................................................... 259
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