Hamilton Electronics EPHUM011 manual Calibration Point 6 Product Calibration, CP6

pH ARC Sensors Modbus RTU Programmer’s Manual (EPHUM011)

Command: Read calibration stability			Modbus address: 5128	Length: 4	Type: 3	Read
Parameter:	Max drift pH		Max drift Temp
	[pH/min]		[K/min]
Format:	Float		Float
Value:	0.1		0.5
Figure 2.7.2.1.5:	Example to read the	calibration stability.
Command: Set calibration stability			Modbus address: 5128	Length: 4	Type: 16	Write
Parameter:	Max drift pH		Max drift Temp
	[pH/min]		[K/min]
Format:	Float		Float
Value:	0.2		0.5

Figure 2.7.2.1.6: Example to set the calibration stability.

Attention:

The stability criteria defined in register 5128 is valid for CP1 and CP2 only, but NOT for CP6.

2.7.2.2Calibration Point 6 (Product Calibration)

The limits for calibration point 6 are given in register 5312.

Start	Number of	Reg1 / Reg2	Reg3 / Reg4	Reg5 / Reg6	Modbus	Read	Write
register	registers				function code	access	access
5312	6	Physical unit	Min value for	Max value for	3, 4	U/A/S	none
		currently	CP6 (in the	CP6 (in the
		active for	physical unit	physical unit
		CP6	as defined in	as defined in
			Reg1 and 2)	Reg1 and 2)

Figure 2.7.2.2.1: Definition of register 5312 for CP6.

Command: Calibration limits CP6			Modbus address: 5312		Length: 6	Type: 3	Read
Parameter:	Unit	Min value		Max value
Format:	Hex	Float		Float
Value:	0x01000	0		14

Figure 2.7.2.2.2: Example to read the limits of CP6. The active physical unit is pH, the min value is pH 0 and the max value is pH 14.

Note: the definition of min and max is different than the one for CP1 / CP2, because CP6 can be set to any pH value.

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