ASTM E644 − 11 Testing Industrial Resistance Thermometers

ASTM E644 − 11 Testing Industrial Resistance Thermometers

The testing for insulation is covered by ASTM E644 − 11. This method includes testing for resistance, calibration, immersion mistake, pressure impacts, self-response time, vibration effect, mechanical shock, self-response time, stability, thermoelectric effect, humidity, end seal integrity, improper hysteresis, and thermal shock.

    Scope:

    These test techniques provide uniform procedures for evaluating industrial resistance thermometers, allowing a tester to expect the same value of a test result from making the same number of tests within the same test piece.

    Procedure

    The analytical procedures appear in the following sections:

    TEST METHODSECTION
    Insulation Resistance Test5
    Thermometer Calibration6
    Minimum Immersion Length Test7
    Pressure Test8
    Thermal Response-Time Test9
    Vibration Test10
    Mechanical Shock Test11
    Self-Heating Tests12
    Stability Test13
    Thermoelectric Effect Test14
    Humidity Test15
    Thermal Cycle and Thermal Hysteresis Test16
    Thermal Shock Test17
    End-Seal Integrity Test18

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    Specimen size

    This test is applicable only for thermometers with immersion lengths less than 51 mm (2 in).

    Data

    Measurements for pressure impacts, self-response time, vibration effect, mechanical shock, self-response time, stability, thermoelectric effect, humidity, etc calculated in each procedure accordingly.

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