pH ARC Sensors Modbus RTU Programmer’s Manual (EPHUM011)
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 | Number | Reg1 / Reg2 | Reg3 / | Reg5 / | Reg7 / | Modbus | Read | Write |
register | of |
| Reg4 | Reg6 | Reg8 | function | access | access |
| registers |
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| code |
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5164 | 8 | Unit of | Value of | Number of | Operating | 3, 4 | U/A/S | none |
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| temperature for | temperature | calibrations | hour for |
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| CP1 (bitwise | of CP1 | at CP1 | CP1 |
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| defined) |
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5196 | 8 | Unit of | Value of | Number of | Operating | 3, 4 | U/A/S | none |
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| temperature for | temperature | calibrations | hour for |
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| CP2 (bitwise | of CP2 | at CP2 | CP2 |
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| defined) |
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5324 | 8 | Unit of | Value of | Number of | Operating | 3, 4 | U/A/S | none |
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| temperature for | temperature | calibrations | hour for |
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| CP6 (bitwise | of CP6 | at CP6 | CP6 |
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| defined) |
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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 |
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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 |
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| 16.45 |
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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 |
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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).
2.7.6Currently 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.
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