FAQ
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| Common Items |
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| TX10 Series Digital Thermometers |
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| TM20 Thermo Collector |
| 1. | What is the difference between the logging and collector functions ? |
| 2. | What does "setting of cycle・period" mean in logging measurements ? |
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| 530 Series Emission Thermometer |
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| Common Items |
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| These are designations for common thermocouple types. A thermocouple consists of two wires of different
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When one end of each wire is in electrical contact at that end of the pair of wires is at a temperature
different from that at the other end of the wires an electromotive force is generated that can be used to measure
the temperature. These four types of thermocouples can be used with YMI thermometers. However, YMI only supplies Type K temperature probes. It is necessary to change a setting in the main unit when using any of the other three types of thermocouples. The materials of these thermocuple types are: Type K: chromel-alumel Type E: chromel-constantan Type J: iron- constantan Type T: copper-constantan |
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| We recommend using a Type T Miniature Plug available from of Omega Engineering and other companies.
The model TX10 has built-in reference junction compensation. |
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| While YMI does not provide such a temperature sensor, other companies do offer such temperature sensors. |
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| Material: FR PET No. B9015 (glass fiber reinforced polyethylene terephthalate, product of Teijin) Grip allowable temperature limits: 200℃ (for reference, the allowable temperature limits for an old Model 2459 was 60 to 70℃). |
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| Since the nominal accuracy is quaranteed based on the combination of the main unit and probe, a certificate cannot be provided for the probe only. |
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| Per JIS C1602-1995 These tolerance classes follow: * Class 1 more than -40℃、max 375℃：±1.5℃ more than 375℃、max 1000℃：±0.004・|t|（±0.4% of measuring temperature) * Class 2: more than -40℃, max +333℃： ±2.5℃ more than 333℃、max 1200℃ : ±0.0075 |t| (±0.75% of measuring temperature) A thermocouple measures temperature by generating an electromotive force that is based on the difference between the temperature being measured and a reference temperature at the other end of the thermocouple. The tolerance is the maximum deviation from the actual temperature being measured by the thermocouple. There is a Class 3 with a large tolerance then Class 2. |
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| The material is Teflon so that the allowable temperature limit will be around 200℃. |
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| TX10 Series Digital Thermometers |
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| First turn the power off, then press the TC TYPE key and POWER key simultaneously. The thermocouple type changes with each press of the TC TYPE key. |
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| First turn the power off by pressing the POWER key once. Then press the POWER key again for more than 5 seconds to reset the display unit to ℃. |
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| With power off press the POWER key and the DATA HOLD key together to turn this feature off. The unit will then not automatically power off after it is turned on. |
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| Yes, the TX10 can be used with thermocouple types K, J, E and T. When other than a type K thermocouple is to be used also use the corresponding type of thermocouple connector for Omega or other source. |
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| TM20 Thermo Collector |
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| Logging function: loads the data based on the preset fixed time interval. Collector function: loads the data as required regardless of the time. This function is useful for the temperature measurements from place to place continuously. |
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| As an example, when the measuring cycle is set for one (1) minute and the period is set for one (1) hour, then measurement stops after 61 measurements have been made. When in the collector function data is measured until the memory is full. When the memory is full the display will not change and measurement will not start even if the MEMORY key is pressed. To restart measuring reset the measured data to less than 20,000. Note that when using the 2-channel setting each channel can measure only 1/2 of the total number of available data points. |
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| 530 Series Emission Thermometers |
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| The object around radiates infrared rays from its surface. (radiant amount is proportional to heat quantity of object.) Non-contact thermometer receives infrared rays without touching an object and measures temperature converted by amount of infrared rays. |
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Non-contact thermometer measures average temperature of object surface.
The surface area is referred to as "field of view". It changes according to measurement distance between thermometer and measured object. It is also different according to each product. To measure correctly, please make sure that measured area satisfy field of view completely.
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| As mentioned in Q2, field of view becomes wider along with longer measurement distance. It is possible to measure with distance of infinity on the principle of operation, but only when the measured object is larger than field of view. |
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| Non-contact thermometer measures surface temperature of solids or liquids. It is not able to measure gasses, internal temperature of solids and liquids. Also, it is not accurately measured under the following conditions. a) Glossy metal b) Measurement through glass |
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| Any object radiates infrared rays with different wavelength according to temperature and material. It is necessary to choose non-contact thermometer which has wavelength of infrared rays for detection corresponding to measurement temperature. Additionally, it should consider the detection wavelength which is less subject to moisture (H2O) and carbon dioxide (CO2) which absorb infrared rays in the atmosphere. 530 series adopt 8 to 14 μm as detection wavelength which is suited to measurement of low temperature of -30 to 600 ˚C with less influence of moisture and carbon dioxide. |
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| The Non-contact thermometer is little affected from dust which can’t see in the atmosphere. However, please avoid using it in environment which can’t see measurement object due to a lot of floating dust. It influences a measurement if dust adhere to a lens surface (filter). Please clean a lens. |
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| As mentioned in Q5, 530 series thermometer detects wavelength which is less influence of moisture and carbon dioxide in the atmosphere. However, please avoid using it in environment which can’t see measurement object due to moisture, as well as Q6. |
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| When it measures perpendicularly to aspect of a measuring object, it measures part which is the area of a circle (or square) as a field of view. When it measures from an angle, a field of view is an ellipse (or lozenge).
Even in this case, measurement is possible if the size of the measuring object fulfills the field of view.
Less than 45 degrees of incidence angles is recommended. |
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| It is possible to measure rotating object because of non-contact to the object. It measures average value of surface temperature of the rotating object which goes through the area of field of view during response time. |
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| The Non-contact thermometer measures not point but area, different from contact type, thus it can measure averaged temperature even if surface of object in the field of view is concavo-convex surface. |
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| The non-contact thermometer is not affected by color in principle. However, there may be influence according to coating material of object surface if there is gloss. |
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| It is possible to measure even in dark place because 530 series detects infrared rays , not visible light. |
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| 530 series are using class 2 laser which is compliant with JIS C6802 standards. Please don’t look the laser beam directly or irradiate human eyes. There is possibility to disable eyes or damage health. |
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| It is not available for medical purpose because 530 series is not clinical thermometer. |
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