Hamilton Electronics EPHUM011 manual Reading the Sensor’s Quality Indicator, 120 130

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

Command: SIP definition			Modbus address: 4988		Length: 8	Type: 16	Write
Parameter:	T min [°C]	T	max [°C]	Time min [min]		Empty
Format:	Float	Float		Float		Float
Value:	120	130		30		0
Figure 2.8.5.3:	Example to write the	SIP definitions.
Command: SIP definition			Modbus address: 4988		Length: 8	Type: 3	Read
Parameter:	T min [°C]	T	max [°C]	Time min [min]		Empty
Format:	Float	Float		Float		Float
Value:	120	130		30		0
Figure 2.8.5.4:	Example to read the	SIP definitions.
Command: CIP definition			Modbus address: 4996		Length: 8	Type: 16	Write
Parameter:	T min [°C]	T	max [°C]	Time min [min]		Empty
Format:	Float	Float		Float		Float
Value:	80	100		30		0
Figure 2.8.5.5:	Example to write the	CIP definitions.
Command: CIP definition			Modbus address: 4996		Length: 8	Type: 3	Read
Parameter:	T min [°C]	T	max [°C]	Time min [min]		Empty
Format:	Float	Float		Float		Float
Value:	80	100		30		0

Figure 2.8.5.6: Example to read the CIP definitions.

2.8.6 Reading the Sensor’s Quality Indicator

In register 4872 the sensor’s quality indicator (0-100%) is given.
Start	Number of		Reg1 / Reg2		Modbus	Read		Write
register	registers		(Float)		function	access		access
					code
4872	2		Quality [%]		3, 4	U/A/S		none
Figure 2.8.6.1: Definition of register 4872.
Command: Quality indicator				Modbus address: 4872			Length: 2		Type: 3	Read
Parameter:		Quality [%]
Format:		Float
Value:		100

Figure 2.8.6.2: Example to read the sensor’s quality indicator.

The sensor’s quality indicator is influenced by:

Offset a pH 7

Slope

Errors

624300/01 page 63 / 67