| Q |
What is a temperature transmitter? |
| A |
A temperature transmitter is a device that captures a signal from a sensor such as a thermocouple or RTD, calculates the temperature based on this signal, and then converts it to a 4-20 mA, FOUNDATION™ fieldbus, or some other type of signal for output to a receiving device. |
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| Q |
What is the measurement principle of a temperature transmitter? |
| A |
When a thermocouple is used, a temperature transmitter measures the electromotive force and terminal block temperature, and uses the electromotive force data to calculate the temperature.
When an RTD is used, the temperature transmitter passes a very small electric current through the RTD to measure electrical resistance.
Based on the relationship between resistance and temperature, it then calculates the temperature.
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| Q |
What are the advantages of YTA temperature transmitters
field-mounting type: YTA110/310/320? |
| A |
| 1) |
YTA110/310/320 temperature transmitters employ a dual-compartment housing that fully separates the electronic circuits from the terminal block containing the sensor signal and power/output lines.
This ensures reliability by preventing exposure of the YTA’s electronic circuits to corrosive gasses and moisture that can enter the terminal block through the wiring holes (glands). |
| 2) |
The BRAIN and HART communication versions are SIL2 certified for use in safety instrumented systems. |
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| Q |
What are the advantages of the YTA50/70 head-mounted temperature transmitters? |
| A |
The YTA50/70 head-mounted temperature transmitters can be mounted in any DIN Form B-compliant temperature sensor housing without further modification.
No special housing or brackets are required, reducing the installation cost. |
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| Q |
Which YTA temperature transmitter should I choose for my application? |
| A |
For standard applications, the YTA110 is recommended. For applications that require higher measurement accuracy, the YTA310/320 models are recommended.
The YTA310/320 achieve high conversion accuracy through the use of stable components that calibrate temperature with high accuracy. For even higher accuracy, the YTA310/320 support an optional sensor matching function that sets a temperature conversion factor for an individual Pt100 sensor, substantially reducing errors associated with sensor characteristics.
For applications requiring the absolutely highest levels of reliability and accuracy, the YTA320 also supports the use of dual input sensors. This ensures a backup in the event of sensor failure and enables the calculation of average and differential temperature.
In addition to the YTA110/310/320 field-mounting types, there are the YTA50/70 head-mounting types for applications requiring greater cost efficiency. The most cost efficient model is the YTA50, and the YTA70 is equipped with a HART commuication function. Both are designed for mounting in the sensor head. |
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| Q |
Are there any reference materials for YTA temperature transmitters? |
| A |
Catalogs, general specifications, and drawings can be downloaded from our website.
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| Q&A for the products |
| Q |
With the YTA110/310/320, is it possible to change the number of digits displayed after the decimal point? |
| A |
The number of display digits is adjusted automatically. For numbers having three or fewer integers, two digits are displayed after the decimal point. For four integer numbers, one digit is displayed after the decimal point. |
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| Q |
With single sensor input, what is the difference between the YTA110 and YTA310 temperature transmitters? |
| A |
The measurement accuracy and the effect of ambient temperature are different. The YTA310 achieves higher conversion accuracy as a result of its carefully selected parts and availability of a temperature calibration function.
Also, the YTA310 supports an optional sensor matching function that sets a temperature conversion factor for individual Pt100 sensors, thus substantially reducing error associated with sensor characteristics. For applications that require higher measurement accuracy, the YTA310 is recommended. |
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| Q |
Is it possible to change the YTA’s range? |
| A |
The range can be easily changed using a setting tool (FieldMate or BRAIN terminal). |
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| Q |
Is it possible to change the mounting angle for the YTA’s integral indicator? |
| A |
The indicator can be rotated 90˚ counterclockwise and 90˚ clockwise. |
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| Q |
How many cable wiring holes are there for the YTA110/310/320? |
| A |
Two (one for the power supply/transmission and another for the temperature sensor) |
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| Q |
What is the minimum operating voltage of the instrument? |
| A |
The minimum operating voltage of the instrument is 10.5V for YTA110/310/320,
7V for YTA50 and 8V for YTA70. |
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| Q |
How many characters (for the tag name) can be printed on the YTA110/310/320 rating plate? |
| A |
Up to 16 alphanumeric characters (including spaces). |
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| Q |
Is a simulated input required when changing the YTA’s range? |
| A |
A calibrator is not required to change just the temperature range. |
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| Q |
Can an unused YTA110/310/320 terminal be used as a junction terminal?
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| A |
This is not possible because the terminal is connected to an internal circuit. |
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| Q |
How tall are the characters that display the process value for the YTA110/310/320? |
| A |
11mm (about half an inch) |
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| Q&A for the application |
| Q |
What applications are best for the YTA320? |
| A |
As the YTA320 can accurately measure differential temperature using data from two sensors, it is ideal for applications such as measurement of the conversion efficiency of a heat exchanger. |
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| Q |
What application is differential input measurement used in? |
| A |
It is used for applications such as checking the temperature change in a heat exchanger or the level switch of a liquid tank.
As temperatures can be measured at two points on the same circuit, higher accuracy is achieved and the effect of disturbances. |
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| Q |
What application is average temperature measurement used in? |
| A |
Measurement of the average temperature at two points is useful in reducing the effect of temperature distribution in a reactor. |
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| Q |
Can the YTA320 be used for detecting failures such as a steam trap? |
| A |
Yes. With its ability to measure differential temperature, the YTA320 can detect such failures with higher accuracy than conventional measurement devices. |
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| Q&A: YTA110 | YTA310/320 | YTA50 | YTA70 |
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