TS-7-M1 glass thermometers are designed to measure air temperature in rooms or equipment, granaries, during processing and storage of meat and dairy products. The article discusses devices of different designs and describes the possibilities of their application.
Description of a measuring instrument
Temperature measurement with a TS-7-M1 thermometer is based on changes in the volume of the thermometric fluid and depends on the environment in which the study takes place. All devices are made of 360 grade glass (according to Standard 1224-71) or material of a similar quality, except for TC-7-M1 isp. 9, polystyrene is used for it (GOST 28250-89).
The devices are made in the form of a glass oval shell, in which the lower part is narrowed and there is a reservoir for thermometric fluid, a capillary tube is attached to it.
For visualization, a thermometric liquid of red shades is used. Typically, it is methylcarbitol or toluene. And inside the device there is a paper scale on which the readings are counted.
The devices are available in 9 versions and differ in technical characteristics and purpose. For example, the TS-7-M1 thermometer isp. 6 is used to determine the temperature inside refrigeration units during storage of meat and dairy products. It can operate in the temperature range from -30 0 to +30 0 .
Characteristics
TS-7-M1 thermometer isp. 7 has two production options. They differ in size and weight. So, option 1 has dimensions 175 * 11.4 * 8.2 mm and a mass of 10 grams. And option 2 is heavier - it weighs 14 grams, has dimensions 195 * 16 * 13.5 mm.
The division value on all devices is 1 degree. Also, thermometers can make an error, it depends on changes in the temperature range:
- from -55 to -38 0 the error can be ± 2 0 ;
- from -38 to 0 0 the error can be ± 1,5 0 ;
- from 0 to +100 0 the error can be ± 1 0 .
The thermometer versions 1 and 7 (version 2) have a polyethylene base, and versions 3 and 6 have a protective frame made of the same material.
Thermometers are manufactured by the Ukrainian company Steklopribor PJSC in Chervonozavodskoye, Ukraine. The cost of devices is from 45 to 110 rubles. The goods can be bought in ordinary stores or ordered on the Internet, having paid for shipping. When buying on a thermometer, a guarantee is not provided, and the device is not subject to exchange or return.
Regulations
Calibration of thermometers TS-7-M1 is carried out on the basis of Standard 8.279-78 once every three years. The main means of verification are laboratory glass thermometers TL-4.
Requirements for glass thermometers are established by such regulatory and technical documents:
- State Standard 28498-90. The standard defines the values of the main indicators that are used to characterize the technical level and quality of thermometers.
- State Standard 8.279-78. The standard defines the methodology for conducting initial and subsequent instrument calibrations.
- State Standard 8.558-2009. The standard defines the state verification scheme for thermometers, which consists of three parts depending on the temperature range.
- Specifications 25-2022.0002-87. Defines the working conditions for each version of the device.
The type of agricultural thermometers TS-7-M1 has approved technical and metrological characteristics. It is successfully used for its intended purpose in various sectors of the economy.