NTC temperature sensor factory test standard
Users in the purchase of ntc temperature sensor, Can be constant current, constant temperature conditions, According to the size of the temperature zone, Two-point or three-point test. To verify interchange accuracy, linearity and temperature coefficient. Under normal circumstances, The easiest test method as long as the test reference voltage value. And all electrical parameters, In the delivery of goods with the parameters of the table (certificate), To provide the detailed parameters of the batch ntc temperature sensor.
The test conditions are as follows:
Constant current source: 100μA ± 0.5%;
Constant temperature field: fluctuation: ≤ ± 0.05 ℃;
Test instrumentation: 41/2 or 51/2 digital voltmeter.
2. Ntc temperature sensor stability standards:
Stability refers to the ntc temperature sensor reference voltage value of the annual drift. This drift is then converted to the temperature value by the temperature-to-voltage conversion factor, Ie stability = ± ΔV / S / year. The stability of the linear temperature sensor is ± 0.05 ℃ / year. This parameter describes the ntc temperature sensor in a variety of conditions to maintain the original characteristics of the ability.
3. Ntc temperature sensor lead standard:
Should be said that little effect, Under normal circumstances the transmission distance of up to 1000 meters. If the distance and then far, Can be considered ntc temperature sensor output signal converted into a digital quantity, This makes it easier to achieve longer distances.