Tolerance Calculator

Inputs

Capacity

Resolution

Scale Class (HB44)

Min Weight

Test Point

Results

NIST HB44 Table T6

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NIST HB44 Table T1.1

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USP

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Inputs

Capacity

Resolution

Scale Class (HB44)

Min Weight

Maximum Test Point

Optional: substitutes for Capacity when computing TP #3–#5.

Test Points

Test Point #1

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Test Point #2

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Test Point #3

—

Test Point #4

—

Test Point #5

—

Inputs

Capacity

Resolution

Scale Class (HB44)

Min Weight

Maximum Test Point

Optional: substitutes for Capacity when computing TP #3–#5.

Test Points & Tolerances

#	Test Point	NIST HB44 T6	NIST HB44 T1.1	USP	Recommended
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HB44 T6 uses the class-specific breakpoints (in scale divisions) and is rounded to the nearest resolution; NIST/USP are floored to resolution and are at least 1×resolution.

Inputs

Value

0.5110100

Actions

Tip: swapping flips “From” and “To”.

From

kggmg µglbozoz t

To

kggmg µglbozoz t

Result

—

Inputs

Sensor Type

Curve Type

Measured Resistance (Ω)

Result

Calculated Temperature

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R₀

100 Ω

Resistance at −200 °C

18.520080 Ω

Resistance at 850 °C

390.481125 Ω

Inputs

Sensor Type

Curve Type

Input Temperature (°C)

Result

Calculated Resistance

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R₀

100 Ω

Curve

PT-385

Temperature Range

−200 to 850 °C

RTD Conversion Notes

PT100 = 100 Ω at 0 °C; PT1000 = 1000 Ω at 0 °C.
PT-385 uses A = 3.9083×10⁻³, B = −5.775×10⁻⁷, C = −4.183×10⁻¹².
PT-392 uses A = 3.9787×10⁻³, B = −5.87×10⁻⁷, C = −4.0×10⁻¹².
Calculations use the Callendar–Van Dusen resistance-temperature equation.
This is a practical PT100/PT1000 RTD conversion aid, not a strict ITS-90 SPRT conversion. ITS-90 requires thermometer-specific calibration coefficients.
Use the sensor or instrument documentation/calibration certificate to select the proper curve.