Solartron Mobrey 7828 - Page 8

7828 Density Transmitter Technical Manual
viii 78285000_AB
APPENDIX B - CALCULATED PARAMETERS
B.1 INTRODUCTION................................................................................B-1
B.2 BASE DENSITY REFERRAL.............................................................B-2
B.2.1 Matrix density referral ....................................................................... B-2
B.2.2 API density referral ........................................................................... B-3
B.3 CALCULATED PARAMETERS..........................................................B-6
B.3.1 Specific Gravity................................................................................. B-6
B.3.2 Degrees Baumé................................................................................ B-6
B.3.3 Degrees Brix..................................................................................... B-6
B.3.4 Quadratic Equation........................................................................... B-6
B.3.5 % Mass............................................................................................. B-7
B.3.6 % Volume ......................................................................................... B-7
B.3.7 API degrees...................................................................................... B-7
APPENDIX C - SAFETY CERTIFICATION
C.1 INTRODUCTION................................................................................C-1
APPENDIX D - MODBUS COMMUNICATIONS
D.1 INTRODUCTION................................................................................D-1
D.2 ACCESSING MODBUS REGISTERS................................................ D-2
D.2.1 Establishing Modbus Communications............................................. D-2
D.3 MODBUS IMPLEMENTATION...........................................................D-3
D.3.1 Register size and content ................................................................. D-3
D.4 MODBUS REGISTER ASSIGNMENTS .............................................D-4
D.5 INDEX CODES...................................................................................D-7
D.5.1 API product type ............................................................................... D-7
D.5.2 Pressure, temperature, density and other units................................ D-7
D.5.3 Special function................................................................................. D-8
D.5.4 Special function quadratic equation name........................................ D-8
D.5.5 Special function quadratic equation units ......................................... D-9
D.5.6 Output averaging time ...................................................................... D-9
D.5.7 Analog output selection.....................................................................D-9
D.5.8 Referral temperature....................................................................... D-10
D.5.9 Alarm coverage............................................................................... D-10
D.5.10 Alarm hysteresis ............................................................................. D-10
D.5.11 Software version............................................................................. D-10
D.5.12 Hardware type................................................................................. D-11