Hamilton Electronics EPHUM011 User 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.