Procedure<\/strong><\/p>\n\n\n\nThe cuff is removed, and a metal container is placed in its place. Then the pressure increases step by step. The values \u200b\u200bof the reference manometer and the manometer of the device under test are taken. The entire test is carried out at normal temperatures and humidity levels.<\/p>\n\n\n\n
Results<\/strong><\/p>\n\n\n\nThe difference between the pressure shown by the device and the pressure of the reference manometer is noted. If this difference is within the permissible limits, the device passes the test.<\/p>\n\n\n\n
2. Test for Pressure Error under Varying Temperature Conditions<\/h3>\n\n\n\n
Apparatus<\/strong><\/p>\n\n\n\nThis test shows whether the device is working properly at different temperatures and high humidity. The device is not always used in the same environment.<\/p>\n\n\n\n
Procedure<\/strong><\/p>\n\n\n\nThe device is placed in a climatic chamber. The device is kept at temperatures of 10\u00b0C, 20\u00b0C, and 40\u00b0C and at high humidity for a specified period. After the device has stabilized in each condition, the pressure is measured.<\/p>\n\n\n\n
Results<\/strong><\/p>\n\n\n\nThe values \u200b\u200bof the device’s manometer and the reference manometer are compared at each temperature. If the pressure difference remains within the limits even after the temperature changes, then the device is considered acceptable.<\/p>\n\n\n\n
3. Test for Pressure Error under Storage Conditions<\/h3>\n\n\n\n
Apparatus<\/strong><\/p>\n\n\n\nThis test ensures that the device’s measuring ability is correct after long-term storage. It is also checked whether the device is damaged during transportation or storage.<\/p>\n\n\n\n
Method<\/strong><\/p>\n\n\n\nThe device is kept at certain high and low temperatures for some time. It is brought to normal temperatures and tested. A metal container is also placed in place of the cuff, and pressure is applied.<\/p>\n\n\n\n
Results<\/strong><\/p>\n\n\n\nThe pressure shown by the device after storage is compared with the reference manometer. If the difference is within the permissible limits, then the device passes the storage test.<\/p>\n\n\n\n
4. Test for Air Leakage in the Pneumatic System<\/h3>\n\n\n\n
Apparatus<\/strong><\/p>\n\n\n\nThis test checks whether the air inside the device is leaking out unnecessarily. The blood pressure measurement may be inaccurate if excess air leaks.<\/p>\n\n\n\n
Procedure<\/strong><\/p>\n\n\n\nThe cuff is wrapped around a cylinder of a specific size. Then the device is pressurized, and the pressure change is observed for some time. This test is done at different pressure levels.<\/p>\n\n\n\n
Results<\/strong><\/p>\n\n\n\nThe amount of pressure that decreases in one minute is calculated. If this pressure decrease rate is within the specified range, then the pneumatic system is working properly.<\/p>\n\n\n\n
5. Test for Pressure Reduction Rate (Deflation Valve)<\/h3>\n\n\n\n
Apparatus<\/strong><\/p>\n\n\n\nThis test ensures that the pressure is decreasing slowly and in a controlled manner. If the pressure decreases too quickly or too slowly, the blood pressure cannot be accurately measured.<\/p>\n\n\n\n
Procedure<\/strong><\/p>\n\n\n\nThe device is used on a human hand or an artificial limb. The test is performed multiple times on limbs of different sizes. The data is recorded with a reference manometer during the pressure decrease.<\/p>\n\n\n\n
Results<\/strong><\/p>\n\n\n\nThe average rate of pressure reduction at a given pressure level is calculated. If this rate is within the specified range, the deflation valve is working properly.<\/p>\n\n\n\n
6. Test for Rapid Exhaust Function<\/h3>\n\n\n\n
Apparatus<\/strong><\/p>\n\n\n\nThis test verifies whether the device can release pressure quickly in an emergency. This is very important for the safety of the patient.<\/p>\n\n\n\n
Procedure<\/strong><\/p>\n\n\n\nA metal container is placed in place of the cuff. After applying maximum pressure to the device, the rapid exhaust valve is fully opened. Then, the decrease in pressure is measured over time.<\/p>\n\n\n\n
Results<\/strong><\/p>\n\n\n\nThe number of seconds it takes to decrease from high pressure to low pressure is recorded. If the pressure decreases within the specified time, the device passes this test.<\/p>\n\n\n\n
7. Test for Scale Spacing and Thickness<\/h3>\n\n\n\n
Apparatus<\/strong><\/p>\n\n\n\nThis test ensures that the marks and numbers on the scale are clear and easy to read. This reduces the possibility of user misreading.<\/p>\n\n\n\n
Procedure<\/strong><\/p>\n\n\n\nDifferent parts of the scale are examined with a magnifying lens equipped with a scale. The thickness of the marks and the distance between the marks are measured. This test is performed at multiple locations.<\/p>\n\n\n\n
Results<\/strong><\/p>\n\n\n\nIf the marks on the scale are clear and of the specified size, the scale passes the test. This test is verified entirely by the eye.<\/p>\n\n\n\n
8. Test for Security against Mercury Leakage<\/h3>\n\n\n\n
Apparatus<\/strong><\/p>\n\n\n\nThis test ensures that the mercury inside the device does not leak even under excessive pressure applied to the device. If mercury leaks, the risk of both the user and the environment increase.<\/p>\n\n\n\n
Procedure<\/strong><\/p>\n\n\n\nIn this test, the device is placed in a safe collection container. Then, a pressure higher than the normal limit is applied. After holding the pressure for some time, the pressure is suddenly released. The condition of the device is carefully observed throughout the process.<\/p>\n\n\n\n
Result<\/strong><\/p>\n\n\n\nAfter releasing the pressure, it is visually checked whether mercury has leaked anywhere. If there is no mercury leak, then the device passes this test.<\/p>\n\n\n\n
9. Test for Mercury Stopping Device Effectiveness<\/h3>\n\n\n\n
Apparatus<\/strong><\/p>\n\n\n\nThis test aims to verify how quickly the mercury stopping device is working. It is important to stop the mercury quickly so there is no risk if the pressure drops suddenly.<\/p>\n\n\n\n
Procedure<\/strong><\/p>\n\n\n\nPressure is applied directly to the mercury reservoir without a cuff. After reaching a certain pressure, the pressure is stopped. Then, the time taken for the mercury to fall from a certain scale to the lower scale is measured with a stopwatch.<\/p>\n\n\n\n
Results<\/strong><\/p>\n\n\n\nIf the time taken for the mercury to fall is within the specified limit, the device is working properly. If it takes longer, the stopping device is considered weak.<\/p>\n\n\n\n
10. Test for Hysteresis Error (Aneroid Manometer)<\/h3>\n\n\n\n
Apparatus<\/strong><\/p>\n\n\n\nThis test checks whether the device shows the same value when increasing and decreasing the pressure. If there is a large difference, the blood pressure result may be incorrect.<\/p>\n\n\n\n
Procedure<\/strong><\/p>\n\n\n\nThe pressure is increased step by step by using a metal container instead of a cuff. After holding it at maximum pressure for a while, the pressure is reduced in the same step. During this time, the device is not tapped in any way.<\/p>\n\n\n\n
Results<\/strong><\/p>\n\n\n\nThe difference in the value obtained at the same level when increasing and decreasing the pressure is calculated. If this difference is within the limit, the device is acceptable.<\/p>\n\n\n\n
11. Test for Durability of Aneroid Manometer<\/h3>\n\n\n\n
Apparatus<\/strong><\/p>\n\n\n\nThis test shows whether the device’s ability to take measurements is correct after using it for a long time. This ensures long-term reliability.<\/p>\n\n\n\n
Procedure<\/strong><\/p>\n\n\n\nThe device is connected to a special pressure generator. Then, 10,000 cycles of increasing and decreasing pressure are carried out. After this process, it is allowed to rest for some time.<\/p>\n\n\n\n
Results<\/strong><\/p>\n\n\n\nThe pressure readings of the device before and after the test are compared. If the difference is within the specified limits, the device is considered durable.<\/p>\n\n\n\n
12. Test for Mechanical Safety<\/h3>\n\n\n\n
Apparatus<\/strong><\/p>\n\n\n\nThis test ensures that the device works properly when dropped, hit, or shaken. This is important for the safety of the user.<\/p>\n\n\n\n
Procedure<\/strong><\/p>\n\n\n\nThe hand-held device is dropped from a certain height onto a wooden platform. Some devices are also tested for vibration and shock. Mercury-containing devices are specifically checked for leaks.<\/p>\n\n\n\n
Results<\/strong><\/p>\n\n\n\nIf the device works properly after the test and mercury does not leak, it is considered safe. If there is any damage, the device is discarded.<\/p>\n\n\n\n
13. Test for Durability of Markings<\/h3>\n\n\n\n
Apparatus<\/strong><\/p>\n\n\n\nThis test ensures that the writing, labels, and markings on the device remain legible even after long-term use. This reduces user errors.<\/p>\n\n\n\n
Procedure<\/strong><\/p>\n\n\n\nAfter all the tests are completed, the markings on the device are rubbed with a cloth. First, a cloth is soaked in water, then alcohol is used.<\/p>\n\n\n\n
Results<\/strong><\/p>\n\n\n\nIf the writing does not fade, the label does not come off, or the corners do not fold after rubbing, then the marking is considered durable.<\/p>\n\n\n\n
Read more – Goa Legal Metrology (Amendment) Rules, 2022<\/a><\/strong><\/p>\n\n\n\n<\/span>Terms and Definitions used in Legal Metrology (General) Amendment Rules, 2026<\/span><\/h2>\n\n\n\nThe Legal Metrology (General) Amendment Rules, 2026, have given clear meanings to some important terms. This makes the rules easy to understand and apply. The meaning of some key terms is given in the table below:<\/p>\n\n\n\n
Key Term explained below-<\/strong><\/p>\n\n\n\n