Hamilton Electronics EPHUM011 - Manual (Page 48)

pH ARC Sensors Modbus RTU Programmer ’ s Manual (EPHUM011)
624300/01 page 48 / 67
2.7.5 Currently active Calibration Parameters part 1
In registers 5164 (CP1), 5196 (CP2) and 5324 (CP6) the currently active calibration parameters part 1
are stored. These registers contain the values for temperature, number of calibrations and operating
hour upon calibration.
Start
register Number
of
registers Reg1 / Reg2 Reg3 /
Reg4 Reg5 /
Reg6 Reg7 /
Reg8 Modbus
function
code Read
access Write
access
5164 8 Unit of
temperature for
CP1 (bitwise
defined) Value of
temperature
of CP1 Number of
calibrations
at CP1 Operating
hour for
CP1 3, 4 U/A/S none
5196 8 Unit of
temperature for
CP2 (bitwise
defined) Value of
temperature
of CP2 Number of
calibrations
at CP2 Operating
hour for
CP2 3, 4 U/A/S none
5324 8 Unit of
temperature for
CP6 (bitwise
defined) Value of
temperature
of CP6 Number of
calibrations
at CP6 Operating
hour for
CP6 3, 4 U/A/S none
Figure 2.7.5.1: Definition of register 5164 for CP1, 5196 for CP2 and 5324 for CP6.
Command: Calibration CP1 values Modbus address: 5164 Length: 8 Type: 3 Read
Parameter: Unit of temperature Temperature Number of cali Operating hour
Format: Hex Float Decimal Float
Value: 0x00000004 24.35184 6 23.78
Figure 2.7.5.2: Example to read the calibration values for CP1. The physical unit is °C (0x00000004),
the temperature is 24.35184 °C, the number of calibrations at CP1 is 6 and the operating hour is
23.78 h.
Command: Calibration CP2 values Modbus address: 5196 Length: 8 Type: 3 Read
Parameter: Unit of temperature Temperature Number of cali Operating hour
Format: Hex Float Decimal Float
Value:
0x00000004 24.37691 5 16.45
Figure 2.7.5.3: Example to read the calibration values for CP2. The physical unit is °C (0x00000004),
the temperature is 24.37691 °C, the number of calibrations at CP1 is 5 and the operating hour is
16.45 h.
Command: Calibration CP6 values Modbus address: 5324 Length: 8 Type: 3
Read
Parameter: Unit of temperature Temperature Number of cali Operating hour
Format: Hex Float Decimal Float
Value: 0x00000004 29.93368 12 379.5167
Figure 2.7.5.4: Example to read the calibration values 1 for CP6. The physical unit is °C (4), the
temperature is 29.93 (°C), the number of calibrations at CP1 is 12 and the operating hour is
379.51 (h).
2.7.6 Currently active Calibration Parameters part 2
Registers 5172 (CP1), 5204 (CP2) and 5332 (CP6) are not defined for pH ARC Sensors, as they
document atmospheric pressure and salinity used for VISIFERM DO / VISIFERM DO ARC Sensors
only.