Decree No. 383 / 2006 Coll.
Ordonnance setting out requirements for thermometers for the control of temperature and hot water with a division of 0,1 ° C or better, used by state control authorities
Valid
Order
Effective from 01.10.2006
Text versions:
01.10.2006
02.08.2006
383
DECLARATION
of 11 July 2006
laying down requirements for thermometers for the control of ambient temperature and hot water with a division of 0,1 ° C or better, used by state control authorities
The Ministry of Industry and Trade provides pursuant to Sections 6 (2), 9 (1) and 27 of Act No. 505 / 1990 Coll., on Metrology, as amended by Act No. 119 / 2000 Coll. and Act No. 137 / 2002 Coll.:
(1) This Regulation lays down the requirements, the type-approval procedure and the verification procedure for:
(a) electronic thermometers for environmental temperature control with a division of 0,1 ° C or better, used by state control authorities (hereinafter referred to as "ambient temperature control thermometers"); and
(b) electronic thermometers for the control of hot water temperature with a division of 0,1 ° C and better used by the State control authorities (hereinafter referred to as "hot water temperature control thermometers").
(2) This Decree was notified in accordance with Directive 98 / 34 / EC of the European Parliament and of the Council of 22 June 1998 laying down a procedure for the provision of information in the field of technical standards and regulations and rules and of rules on information society services, as amended by Directive 98 / 48 / EC.
The terminology, the requirements for ambient temperature control thermometers and hot water temperature control thermometers, the type approval procedure and the verification procedure are set out in the Annex.
This Decree shall take effect on 1 October 2006.
Minister:
Ing. Urban v. r.
Annex to Decree No 383 / 2006 Coll.
1 TERMINOLOGY
1.1 Celsius temperature is the temperature equal to the difference between thermodynamic temperature and 273.15 K.
1.2 Celsius temperature scale is a temperature scale derived from Kelvin's temperature scale by shifting by 273.15 K, which is a value of 0,01 K below the thermodynamic temperature of the three water points.
1.3 The temperature sensor is the basic functional part of the thermometer or temperature sensor that converts the temperature at the measured point to a variable suitable for evaluation.
1.4 The response time is the time interval between the moment when the sensor is exposed to the specified jump change and the time when the response of the specified measuring chain reaches its constant (steady) value within the specified limits. This is the time at which the indicated value of the thermometer reaches 90% of the final steady value.
1.5 The Ethylene thermometer is an accurate thermometer or temperature sensor, designed as an interpolation apparatus for the temperature scale or for the connection of other thermometers or temperature sensors.
1.6 A temperature measurement error is the difference between the temperature measured by the meter and the actual temperature determined by the ethalon thermometer.
1.7 The coefficient of expansion k = 2 for the normal (Gaussian) distribution means that the confidence interval corresponds to the confidence coefficient value of 0,95 (i.e. the actual value is likely to be 0,95 at the boundaries of the expanded uncertainty value).
1.8 The measuring range of the thermometer for checking the temperature of the environment or thermometer for checking the temperature of the hot water is the range of temperatures between the highest and lowest temperature values between which the thermometer is capable of measuring (in accordance with the manufacturer's specification) and a permissible temperature error is guaranteed.
1.9 Uncertainty is a qualified estimate assigned to the result of the measurement and characterising the interval of values that are claimed to be within it of the correct value.
1.10. The temperature control thermometer or hot water temperature control thermometer is the temperature sensor length affecting the space or the device in which the temperature is measured. It shall be measured from the end of the temperature sensor to where it leaves the device in which it is inserted or the space in which the temperature is measured.
1.11 A comparison thermostat (bath) is a device to maintain a constant temperature and to ensure a desired temperature distribution in the working area to verify hot water temperature or temperature control thermometers or temperature sensors. This may be an air or liquid comparison thermostat.
1.12 The temperature sensor is a separate component of a temperature measuring device that contains a temperature sensor.
1.13. The specified working conditions are the conditions of use for which the metrological requirements of the measuring instrument are to be established within the specified limits.
1.14. Thermometer for checking the temperature of hot water and thermometer for checking the temperature of the environment are temperature measuring instruments.
1.15 Thermodynamic temperature is the temperature determined according to Kelvin's thermodynamic temperature scale.
1.16. The complete dive is a heat sink for checking the ambient temperature or temperature thermometer for checking the hot water temperature at which the whole temperature sensor is exposed to the measured temperature.
1.17 The external temperature sensor (probe) is a sensor that measures the temperature outside the body of its own thermometer - indicator device.
If the sensor is designed to measure the temperature of the air, such a sensor is called a spatial probe.
If the sensor is designed to measure the temperature of the liquid, then such a sensor is called a submarine probe.
1.18. The internal temperature sensor is a sensor that measures the temperature inside the thermometer body for checking the ambient temperature.
2. REQUIREMENTS FOR HEALTH CHECKS AND HEALTH CHECKS
2.1. METHOLOGICAL REQUIREMENTS
2.1.1 Thermometers for temperature control.
2.1.1.1. The measurement range shall be at least (-10 to + 50) ° C.
2.1.1.2. The resolution capability of the thermometer for temperature control is 0,1 ° C and better.
2.1.1.3. The height of the digits of the indicator unit - displays is at least 4 mm (if the display is part of the evaluation unit).
2.1.1.4. The maximum permissible error in the accuracy of the meter data (as a whole) may be ± 0,4 ° C within the measurement range.
2.1.1.5 The indication unit shall show the measured temperature in degrees Celsius, which shall be indicated on the gauge.
2.1.1.6. Thermometer response time for environmental temperature control is not more than 180 seconds
2.1.2 Thermometers for checking hot water temperature (with submersible probe)
2.1.2.1. The measurement range shall be at least (0 to + 100) ° C.
2.1.2.2. The radiance of the thermometer for hot water temperature control is 0.1 ° C and better.
2.1.2.3. The height of the digits of the indicator device - displays shall be at least 4 mm.
2.1.2.4. The maximum permissible error of accuracy of the thermometer reading for checking the temperature of hot water (as a whole) may be ± 0,4 ° C within the measurement range.
2.1.2.5 The indication unit shall show the measured temperature in degrees Celsius, which shall be indicated on the gauge.
2.1.2.6. Thermometer response time for hot water temperature control not exceeding 60 seconds
2.1.3 Recording equipment used to register measured values over time interval
2.1.3.1. The temperature control thermometer recording device shall enable the measured data to be recorded in the internal meter memory in the set period.
2.1.3.2. A holiday record time error may reach a maximum of 0,2% of the recording time.
2.1.3.3. The recording device is not a mandatory part of the thermometer for measuring ambient temperature.
2.2 TECHNICAL REQUIREMENTS
2.2.1. Requirements for the design of a thermometer for checking hot water temperature and a thermometer for checking ambient temperature
2.2.1.1. The gauge shall be designed for measuring air temperature or for measuring water temperature or for measuring both previous methods.
2.2.1.2. The meter can be equipped with a communication interface that enables connection of attachments (PC, printer). This interface shall not affect its metrological characteristics. By means of a communication interface, the measured data can be transmitted to or controlled by computer means by means of these means by the frequency of recording the measured data into the internal memory of the thermometer for checking the ambient temperature or the thermometer for checking the hot water temperature. It shall be ensured that the metrological characteristics of the measuring instrument cannot be changed or recorded data are altered or deleted by normal computing at user level.
2.2.1.3. The temperature control thermometer and the hot water temperature control thermometer may be combined as a whole with other measuring instruments such as a humidifier or barometer; their function shall not affect or impede the function or accuracy of the temperature measurement.
2.2.2 Special requirements for the design of thermometers for environmental temperature control
2.2.2.1. The temperature control thermometer is designed to measure air temperature in closed or open spaces.
2.2.2.2. The temperature control thermometer consists of an electronic evaluation unit that is located inside the apparatus body and a temperature sensor. The temperature sensor is made up of a sensor that operates on the principle of electrical resistance to temperature. The evaluation unit shall measure the temperature sensor resistance and convert the measured electrical resistance to temperature. Temperature is displayed on the indicator device - display. If the meter is not equipped with a display, the measured data may be displayed via a communication interface.
2.2.2.3. The temperature sensor may be internal (built inside the instrument body) or external. The external temperature sensor is connected to the evaluation unit by cable.
2.2.2.4. The external temperature sensor may form one unit with the evaluation unit or be detachable, for example by means of a connector. The detachable temperature sensor shall be permanently identifiable in such a way as to avoid confusion (for example, the production number).
2.2.2.5. If the length of the coupling line could significantly affect the metrological characteristics of the gauge or the external temperature sensor is difficult to identify, the external temperature sensor shall be permanently connected to the evaluation unit.
2.2.2.6. The design arrangement of the thermometer for checking the ambient temperature shall enable it to be verified as a whole.
2.2.3 Specific requirements for the design of thermometers for hot water temperature control
2.2.3.1. The design arrangement of the thermometer for checking the temperature of hot water shall enable it to be verified as a whole.
2.2.3.2. The hot water temperature control thermometer consists of an electronic evaluation unit located inside the body of this thermometer and a temperature sensor. The temperature sensor is made up of a sensor that operates on the principle of electrical resistance to temperature. The evaluation unit shall measure the temperature sensor resistance and convert the measured electrical resistance to temperature. Temperature is displayed on the indicator device - display.
2.2.3.3. The design of the temperature sensor shall be such that, when used and cleaned normally, it cannot be damaged or its metrological properties changed (especially watertight design, chemical and mechanical resistance).
2.2.3.4. The temperature sensor shall be so designed as to allow undamaged and variable properties during use and during the verification of immersion into:
(a) hot water; and
b) working fluids thermostatic bath (alcohol, water, oil).
2.2.3.5. The temperature sensor, whose sensor is temperature dependent resistance, is either built firmly into the gauge as an external temperature sensor or can be connected to a cable evaluation unit.
2.2.3.6. The external temperature sensor, which is connected to the cable evaluation unit, can form a single unit or can be disconnected, for example by means of a connector. The detachable temperature sensor shall be permanently identifiable in such a way as to avoid confusion (for example, the production number).
2.2.3.7. If the length of the coupling line could significantly affect the metrological characteristics of the gauge or the external sensor may be confused, the external temperature sensor shall be permanently connected to the evaluation unit.
2.2.4. Labels and marks
The indication of the thermometer for checking the temperature of hot water as well as the thermometer for checking the temperature of the environment shall be measured in the Celsius scale marked on the gauge by the letter ° C. This applies not only to the actual display of the thermometer for checking the temperature of hot water and the thermometer for checking the temperature of the environment, which must show the temperature measured data at Celsius degrees, but also to the identification of data which can be read from the apparatus by means of a communication interface.
3 TYPE APPROVAL
3.1 Procedure for the type-approval of thermometers for the control of hot water temperature or for the control of ambient temperature.
3.1.1 Thermometers for environmental temperature control and thermometers for hot water temperature control shall be resistant to influencing factors such as:
(a) AC supply voltage fluctuations (when the apparatus is equipped with a network adapter);
(b) changes in the frequency of the AC power supply (when the apparatus is equipped with a network adapter);
(c) AC voltage fluctuations;
(d) environmental effects (temperature, humidity); and
(e) mechanical vibration and shock.
3.1.2. The hot water temperature control thermometer and the ambient temperature control thermometer shall meet the essential requirements:
(a) electromagnetic compatibility requirements laid down by specific legislation1);
(b) basic environmental impact tests - strikes,
(c) the degree of protection by covering; and
(d) the technical requirements for electrical measuring equipment laid down by specific legislation (m2).
The metrological tests of the equipment for type-approval purposes may be initiated after proof of compliance with the above requirements.
3.1.3. The subject of the type-approval assessment shall be, in addition to the own measuring instruments, the assessment of the document3) submitted by the contracting authority for the type-approval test of the measuring instrument.
3.1.4. The metrological characteristics of the gauge shall be tested in accordance with paragraph 4. The test shall be carried out on at least three specimens of a thermometer to check the temperature of hot water or a thermometer to check the temperature of an environment of the same type. The gauge shall be satisfactory for type approval if, for all thermometers submitted for testing, the accuracy error of the value specified in paragraph 4.3 above does not exceed.
3.2. Type-approval certificate
3.2.1 The requirements of the type-approval certificate are laid down in a separate legislative act. 4)
3.2.2. The annex to the type-approval certificate, the technical test report, shall specify, in addition to the particulars specified in the specific legislation, the temperatures in which initial and subsequent verification is carried out.
4 VERIFICATION
4.1 Requirements for test and etalon equipment
4.1.1 Thermometers for checking the temperature of the environment and thermometers for checking the temperature of the hot water shall be tested using a method of comparing their data with those of the ethalon thermometer. Only a platinum temperature sensor calibrated in the range of (-39 to + 156) ° C, secondary second-order etalon, together with a measuring and evaluation device, may be an etalon thermometer. The uncertainty of determining the temperature of the liquid in the reference thermostat shall not exceed 0,03 ° C for the coefficient of expansion k = 2 within the measurement range of the test thermometer.
4.1.2 Air - the space probe is tested either in the air-conditioning thermostat (air-conditioned chamber) or after being inserted into the watertight container of the submarine in a liquid bath.
4.1.3. The hot water temperature control thermometer shall be tested in a liquid comparison thermostat where the internal space allows the measurement to be carried out at full draught of the test thermometer. The temperature difference in the liquid reference thermostat working space shall be not more than 0,03 ° C.
4.1.4 Stops or other time-time devices with a range of at least 10 h and a relative error of less than 0,02%.
4.2. General requirements for a validated gauge
4.2.1 The procedure for initial and subsequent verification of the thermometer for checking the temperature of hot water and the thermometer for checking the temperature of the environment is identical.
4.2.2. During the external inspection of the hot water temperature thermometer or the ambient temperature thermometer, defects shall be detected visually. When checking compliance with the technical requirements, it shall be established whether the gauge meets the requirements of paragraph 2.2. Measurements which fail to comply with the external inspection and inspection of the prescribed requirements shall be excluded from further tests.
4.3. Procedure for the accuracy test of the measured gauge
4.3.1. The hot water temperature control thermometer and the ambient temperature control thermometer shall be tested at five points of the prescribed temperature range, evenly distributed throughout the range interval. The first and last points shall lie within the prescribed temperature range.
4.3.2. The temperature sensor and thermometer sensor for checking hot water temperature (or the whole thermometer with internal sensor) are located in the operating space of the comparison thermostat together with the etalon thermometer and allowed to be tempered for the time needed to stabilize the temperature.
4.3.3 The temperature in the comparison thermostat is determined by an etalon thermometer.
4.3.4. Each reading of the thermometers tested must begin and end by determining the temperature with an etalon thermometer.
4.3.5. A maximum of five measuring instruments may be tested simultaneously during one test.
4.3.6. Deductions shall be made over time according to the following scheme:
| 1. odečet: | TE, T1, T2 ...................... T5, TE | |
| 2. odečet: | TE, T5, ........................... T2, T1, TE | |
| 3. odečet: | TE, T5,........................... T2, T1, TE | |
| 4. odečet: | TE, T1, T2 ...................... T5, TE |
where TE is the temperature indicated by the ethalon thermometer,
T1...... T5 temperature data measured by the test thermometers 1..... 5.
4.3.7. From the measured values of the measured meters, the arithmetic mean shall be calculated for each series of readings separately. From the measurement thermometer, the temperature of the liquid in the reference thermostat shall be calculated for each series of readings.
4.3.8. Error The measured data are calculated from the relationship
∞ = tT - tE
where tT is the arithmetic mean of the temperature data measured by the test gauge,
tE is the conventional right-hand temperature value measured by an etalon thermometer.
4.3.9. The maximum permissible error in accuracy of the test gauge data may be ± 0,4 ° C.
4.4. Procedure for recording time accuracy test
4.4.1. This test shall only be carried out on gauges equipped with recording equipment. In this test the recording time shall be checked in the range of permitted errors set by the technical requirements for recording equipment. The check may be carried out either by evaluating the test record or by other means, if recommended by the manufacturer and usable for verification purposes.
4.4.2. The internal recording device shall be set to its maximum speed (i.e. the shortest recording interval). The actual time for the test record shall be measured using stopwatch (see paragraph 4.1.4) and compared with the time interval measured by the recording device. The recording device shall be checked at ambient temperature.
4.4.3. The recording device shall be activated (activation by buttons or communication interface).
4.4.4. The temperature control thermometer with internal temperature sensor or air probe shall be exposed to the recorded data file at the start of the test at which the stoppers are triggered. After stabilising the data of this thermometer, a jump temperature change shall be made to the original temperature.
4.4.5. The recording shall be kept running together with the stopwatch for a sufficient period of time. For this period, the gauge or thermometer probe may be at ambient temperature.
4.4.6. At the end of the test period, the measuring instrument shall be repeatedly exposed to a temperature change, indicating the end of the test and stopping the stopwatch in the recorded data file.
4.4.7. Data shall be subtracted from the recording device, when the time interval between the jump changes at the beginning and the end of the test is compared to the time interval measured by means of stopwatch.
4.4.8 The estimate of the length of time interval T (in minutes) required to check the recording time shall be calculated using the following formula:
T = 100 .tiσp
where the shortest measurable time interval on the record is in minutes;
δp is the biggest vacation error in percent.
4.4.9 The recording time shall be measured by recording equipment (see paragraphs 4.4.4 to 4.4.6). Its delta percentage error shall be calculated using the following formula:
∞ = tc - trtc × 100
where tc is the recording time measured by the stop,
tr is the recording time measured by the recording device.
4.4.10 The recording time error must be less than or equal to the largest permissible error, which is 0,2% of the measured interval. If the measurement error does not exceed the permissible error, the verification shall be eligible for the measurement of the recording time.
4.4.11. The actual uncertainty of the measurement of the record time is negligible with regard to the time interval, stopwatch accuracy and operator response time.
4.5 Verification sheet
If the validated measuring instrument complies with the requirements of this Regulation, it shall be marked with an official mark and a certificate shall be issued (5).
1) Government Decree No. 18 / 2003 Coll., laying down technical requirements for products with regard to their electromagnetic compatibility.
2) Government Decree No. 17 / 2003 Coll., laying down technical requirements for low voltage electrical equipment.
3) § 1 of Decree No. 262 / 2000 Coll., which ensures the uniformity and accuracy of meters and measurements, as amended by Decree No. 344 / 2002 Coll.
4) § 3 of Decree No. 262 / 2000 Coll.
5) § 6 of Decree No. 262 / 2000 Coll.
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Regulation Information
| Citation | Decree No. 383 / 2006 Coll., laying down requirements for thermometers for the control of temperature and hot water with a division of 0,1 ° C and better used by state control authorities |
|---|---|
| Regulation Type | Order |
| Author | - |
| Collection | Code of Laws |
| Date of Promulgation | 02.08.2006 |
|---|---|
| Effective from | 01.10.2006 |
| Effective until | - |
| Status | Valid |
The regulation text is for informational purposes only.
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