Several questions about the test the temperature of the fuel dispenser

1. Selection of the thermometer. JJG443-2006 auxiliary equipment requirements thermometer measuring range is -25 ℃ ~ 55 ℃, minimum scale value 0.2 ℃. But now most of the measurement technology used in the practical work agencies inexpensive glass thermometer, this thermometer has the following defects: ⑴ breakable glass thermometer; ⑵ glass thermometer to measure the internal oil temperature gauge is not convenient; ⑶ glass thermometer bulb reaction slower. It is therefore recommended to select digital display platinum resistance thermometer minimum scale value 0.2 ℃, the measurement range of -30 ℃ ~ 60 ℃, the use of platinum resistance temperature sensor, built-in battery power supply, the length (50 ~ 70) cm stainless steel tube protection, not damaged, eye-catching display, rapid, accurate and convenient.
2. Temperature measurements.
2.1 muzzle oil temperature measurement. When measuring oil muzzle temperature, oil oiling the metal gauges must always flow from temperature thermometer segment too, the oil temperature muzzle distance about 1cm, when the thermometer showing the value of steady and rapid reading (or cng fuel dispenser indication When the measurement reaches 50% to 70% of metal gauges capacity), the recording data.
2.2 Metal car fuel dispenser oil temperature measurement. When measuring the oil temperature gauge metal, glass thermometer, thermometer upper line of rope oil, temperature gauge metal segment can reach the central limit (which can be a stick in the other end of the rope, slightly longer than the overflow cover diameter measurement gauges prevent metal thermometer fall), holding a rope into metal thermometer gauge, temperature gauge metal middle segment arrives, after the end (3 ~ 5) min thermometer bulb section before was quickly exposed reading recorded data.
Another approach: When the metal gauges measuring emissions of oil, when oil into about half of the measured temperature in the vessel; or when Metal Tank discharge of oil, in a pitch gauge thermometer bulb row It was measured at about 1cm mouth until the thermometer shows stable reading value, which replaces the oil inside the metal gauges.