Siemens 200 P661 Temp Fixed, P663 Temperature Transducer Allocation, P660 Temp Source

Parameters

In gasses other than air, the temperature variation may not correspond with the speed of sound variation. In these cases turn off the temperature sensor and use a fixed temperature.

P661 Temp Fixed

Use this feature if a temperature sensing device is not used.

Primary Index	Transducer
Values	Range: -199 to 199 (preset = 20 °C)
	•	P651	Sound Velocity Calibration
Related	•	P653	Velocity
	•	P654	Velocity at 20°C
	•	P660 Temp Source

Enter the temperature (in °C) of the atmosphere within the transducer acoustic beam. If the temperature varies with distance from the transducer, enter the average temperature.

P663 Temperature Transducer Allocation

This feature may only be used for differential or average Operation (P001 = 4 or 5).

Primary Index	Transducer
	1	*	Transducer One
Values
	2		Transducer Two
	1:2		Transducer One and Two average [MR200]
	•	P651	Sound Velocity Calibration
Related	•	P653	Velocity
	•	P654	Velocity at 20°C

As preset, the temperature measurements of Ultrasonic / Temperature Transducer One and Two are allocated to Points 1 and 2 respectively.

Use this feature if the temperature measurement from both transducers should be identical, but one is located close to a radiant heat source. Allocate the temperature measurement of the other transducer to both transducer Point Numbers.

Enter the number of the Transducer whose temperature measurement will be used for the distance calculation of the Point Number displayed. When both transducers are allocated to a Point Number, the temperature measurements from each are averaged.

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