Standard RTD Platinum Temperature Sensor

The Standard Platinum Resistance Thermometer measures the temperature according to the changeable regularity of the resistance temperature of the platinum.

In accordance with the regulations of ITS90, the T90 is defined by the platinum thermometer when triple point (13.8033K) of the nitrogen balance reaches to the temperature range of silver freezing point. It is indexed by using the group of required defined freezing point and reference function as well as the deviation function of the temperature interpolation.

The above temperature zoning is divided into several and decided to work normally within the sub-temperature zone by various different forms of structure of thermometers.

First class standard platinum resistance Highlight

1.Temperature Range: 0~660℃

2.The nominal resistance value at the water three-phase point(Ω) : 25

3.sensitivity Ω/℃ : 0.1

4.Braided : quartz

I. Use Information

1. Before using, firstly, check the thermometer number to be consistent with the test certificate.

2. When using, according to the lug logo of the thermometer wire terminal, connect the wire correctly. The lug of the red wire is connected to the current positive terminal; the lug of the yellow wire, to the current negative terminal; and the lug of the black wire, to the potential positive terminal; the lug of the green wire, to the potential negative terminal.

3. The current should be 1MA according to the measuring of the temperature component of the thermometer.

4. For matching the electrical measurement device of the thermometer for measuring temperature, the low resistance potentiometer of grade 1 and the standard coil resistance of grade 0.1 or the measuring precise temperature bridge as well as the accessories should be used. The complete set of electrical measuring device should be guaranteed to have the sensitivity to distinguish the changing of one ten-thousandth Ohm.

5. During the process of using, preservation and transportation, try to avoid the severe mechanical vibration of the thermometer.

6. When using the first grade Standard Platinum Resistance Thermometer to test the temperature of the second grade Standard

Platinum Resistance Thermometer, should follow the verification procedures approved by National Measurement Bureau.

7. The regular test of the thermometer should be done stringently according to the relevant verification procedures and regulations .

Precautions when use

1. The insulation tube cannot be used at high temperature roasting. The original insulation tube is used after strict cleaning and high temperature roasting.

2. The insulation tube ignores positive and negative, which will cause the platinum pole to be contaminated and the thermoelectric potential value to decrease.

3. Randomly the standard thermocouple insulation tube with cheap wire will contaminate the standard thermocouple, and the protective metal tube must be used for the verification of the base metal thermocouple.

4. The standard thermocouple cannot be suddenly placed in the temperature-regulating furnace, nor be taken out from the temperature-regulating furnace. The sudden-heat and cold will affect the thermoelectric performance

5.Under normal circumstances, the verification furnace for the precious metal thermocouple and the base metal thermocouple should be strictly distinguished; if it is impossible, the clean ceramic tube or corundum tube(diameter about 15mm) should be inserted to the furnace tube for protecting precious metal Thermocouples and standard thermocouples from base metal thermocouple pollution

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