Hamilton Electronics EPHUM011 manual Sensor Status, Temperature Ranges

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

2.8Sensor Status

2.8.1 Temperature Ranges

In registers 4608, 4612 and 4616 three different temperature ranges are defined:

Operation –in this range the sensor will work properly (current output, Modbus communication), except the measurement, which is stopped until the temperature is back in the measurement range. In this case the last value of measurement will be frozen and sent to analog interfaces.

Measurement –in this range the sensor is able to measure.

Calibration –in this range the sensor can be calibrated.

Start	Number of	Reg1 / Reg2	Reg3 / Reg4		Modbus	Read	Write
register	registers				function	access	access
					code
4608	4	Operating	Operating		3, 4	U/A/S	none
		temperature min [°C]	temperature max	[°C]
4612	4	Measurement	Measurement		3, 4	U/A/S	none
		temperature min [°C]	temperature max [°C]
4616	4	Calibration	Calibration		3, 4	U/A/S	none
		temperature min [°C]	temperature max [°C]

Figure 2.8.1.1: Definition of register 4608, 4612 and 4616.

Command: Operating T range			Modbus address: 4608		Length: 4	Type: 3	Read
Parameter:	Operating T min	Operating T max
	[°C]	[°C]
Format:	Float	Float
Value:	-20	130
Figure 2.8.1.2:	Example to read the	operating temperature		values min and max.
Command: Measurement T range			Modbus address: 4612		Length: 4	Type: 3	Read
Parameter:	Measurement T	Measurement T
	min [°C]	max [°C]
Format:	Float	Float
Value:	-20	130
Figure 2.8.1.3:	Example to read the	measurement temperature values min and max.
Command: Calibration T range			Modbus address: 4616		Length: 4	Type: 3	Read
Parameter:	Calibration T min	Calibration T max
	[°C]	[°C]
Format:	Float	Float
Value:	5	50

Figure 2.8.1.4: Example to read the calibration temperature values min and max.

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