Home Decision Rules for Declaring Tolerance Conformity

Decision Rules for Declaring Tolerance Conformity

Decision Rules by product grouping:

1. Model M1111, F1116, M1120, F1119, M1125, F1125, M1110, F1109, 1807A, M1130, F1130, 1505, 2505, 2818, M1118, F1117, M1135, F1135, 1510, 2510, and 2850. The base models are listed, however, the decision rules below also pertain to models with suffixes A, AC, B, C, H, & N:
  1. Incoming calibration factors are reported as in-tolerance or out-of-tolerance based on the difference in reported calibration factor between the test being reported and the most recent test for which TEGAM has records. This comparison is intended to catch large changes in calibration factor that could be caused by excessive drift or damage. The magnitude of the difference between the current and the previous measurement is compared with the RSS combination of the k=2 uncertainty of the two tests, plus a 0.5%/year calibration factor change allowance. In-tolerance is reported if the magnitude difference is less than the combined uncertainty plus the change allowance; otherwise out-of-tolerance is reported. Additionally, out-of-tolerance is reported if the calibration factor is below the minimum allowed calibration factor, if such a specification exists for this model. When a specification does exist, conformity statements to the specification are based on “Simple Acceptance” with the tolerance limit being set as the acceptance limit with a TUR constraint ranging from 1:1 to 4:1.
  2. Outgoing calibration factors are reported as in-tolerance when the minimum calibration factor is met, if such a specification exists for this model. When a specification does exist, conformity statements to the specification are based on “Simple Acceptance” with the tolerance limit being set as the acceptance limit with a TUR constraint ranging from 1:1 to 4:1.
  3. Tests are conducted to measure rho magnitude and angle to perform Gamma correction and to verify that the mount meets manufacturer’s specifications for maximum reflection. Magnitude and angle are reported with uncertainty. The in-tolerance/out-of-tolerance conclusion compares the magnitude of the reported reflection coefficient with the maximum allowable reflection from the most recent TEGAM specification for the product. When a specification does exist, conformity statements to the specification are based on “Simple Acceptance” with the tolerance limit being set as the acceptance limit with a TUR constraint ranging from 1:1 to 4:1. If the measured magnitude is less than the specified maximum, a PASS is reported; otherwise a FAIL is reported.
2. Model 911, 912, 921, 922, 931, 932, 940, 945, 947, 948. The base models are listed, however, the decision rules below also pertain to models with suffixes A & B:
  1. Test Results are reported as Pass/Fail based on compliance with a guard-banded test limit. The test limit is guard-banded to provide a probability of a false pass of less than 2.0%.
3. Model 1830A:
  1. Calibration factors for the 1830A RF Power meter are measured with the uncertainties reported. These factors are subject to two comparisons:
    1. They are compared to intended “nominal” values as a gross check of the function of the circuit. TEGAM engineering has determined conservative limits that indicate that the circuit is functioning as intended. If the factor is found to within the limits (listed on the test report), a PASS is issued; otherwise a FAIL is reported. Conformity statements to the specification are based on “Simple Acceptance” with the tolerance limit being set as the acceptance limit with a TUR constraint ranging from 1:1 to 4:1.
    2. The factors are compared to the most recent set of factors stored within the unit being calibrated, and a difference, “delta” computed for each factor. The delta indicates how much each calibration factor has changed since the last test. TEGAM engineering has assigned acceptable limits for change to each factor, based on the change in factor’s impact upon the error budget of 1830A power measurements. The limits only take into account the impact on 1830A results of the change. The error budget for the 1830A takes into account both the reported uncertainty of the measurement of the factor, AND the allowed change. If the “delta” is less than 75% of the limit, a PASS is reported; if between 75% and 100% of the limit, a pass is reported, but the data point is highlighted to WARN of the condition; and if the delta is larger than the limit, a FAIL is reported.
4. Models 1804, 1805, and 1806. The base models are listed, however, the decision rules also pertain to models with suffixes A, B, and /220:
  1. The parameters measured in the test report, containing specific tolerance limits are reported as pass/fail or in-tolerance/out-of-tolerance. Conformity statements to the specification are based on “Simple Acceptance” with the tolerance limit being set as the acceptance limit with a TUR constraint ranging from 1:1 to 4:1.
  2. The power sensor calibration factors derived with this device installed as part of a TEGAM, Inc Power Sensor Calibration System are reported as in-tolerance or out-of-tolerance based on the difference in calibration factor between the test being reported and the current calibration for that sensor. The difference between the current and the previous measurement is compared with the RSS combination of the k=2 uncertainties of the two tests. In-tolerance is reported if the calibration factor difference is less than the combined uncertainty; otherwise out-of-tolerance is reported.
5. N Type, 3.5mm, and 2.4mm attenuators from 0dB through 30dB and power splitters, in the frequency range of 100kHz–50GHz. This includes, but is not limited to the following attenuators: 138-645-1, 138-645-2, 1130-913-02, 1135-913-02, Model 2 (2-XX), Model 44 (44-XX) and the attenuators (only) in the 187-4001 kit. This includes, but is not limited to the follow power splitters: 102-475-1, 102-688, and RG-100.
  1. Attenuation, rho magnitude, and reflection coefficient are reported as in tolerance if the value measured is within the attenuation and reflection limits specified for the attenuator. If these limits are not specified, the limits that are available (attenuation limits only for example) or limits agreed to with the customer will be used as the pass/fail criteria. Conformity statements to the specification are based on “Simple Acceptance” with the tolerance limit being set as the acceptance limit with a TUR constraint ranging from 1:1 to 4:1.
6. 1825, 1825/220, 1827, and 1827/220:
  1. The parameters measured in the test report, containing specific tolerance limits are reported as pass/fail or in-tolerance/out-of-tolerance. When a specification does exist, conformity statements to the specification are based on “Simple Acceptance” with the tolerance limit being set as the acceptance limit with a TUR constraint ranging from 1:1 to 4:1.
  2. Incoming calibration factors are reported as in-tolerance or out-of-tolerance based on the difference in reported calibration factor between the test being reported and the most recent test for which TEGAM has records. This comparison is intended to catch large changes in calibration factor that could be caused by excessive drift or damage. The magnitude of the difference between the current and the previous measurement is compared with the RSS combination of the k=2 uncertainty of the two tests, plus a 0.5%/year calibration factor change allowance. In-tolerance is reported if the magnitude difference is less than the combined uncertainty plus the change allowance; otherwise out-of-tolerance is reported. Additionally, out-of-tolerance is reported if the calibration factor is below the minimum allowed calibration factor, if such a specification exists for this model. When a specification does exist, conformity statements to the specification are based on “Simple Acceptance” with the tolerance limit being set as the acceptance limit with a TUR constraint ranging from 1:1 to 4:1.
  3. Outgoing calibration factors are reported as in-tolerance when the minimum calibration factor is met, if such a specification exists for this model. When a specification does exist, conformity statements to the specification are based on “Simple Acceptance” with the tolerance limit being set as the acceptance limit with a TUR constraint ranging from 1:1 to 4:1.
  4. Tests are conducted to measure rho magnitude and angle to perform Gamma correction and to verify that the mount meets manufacturer’s specifications for maximum reflection. Magnitude and angle are reported with uncertainty. The in-tolerance/out-of-tolerance conclusion compares the magnitude of the reported reflection coefficient with the maximum allowable reflection from the most recent TEGAM specification for the product. . When a specification does exist, conformity statements to the specification are based on “Simple Acceptance” with the tolerance limit being set as the acceptance limit with a TUR constraint ranging from 1:1 to 4:1. If the measured magnitude is less than the specified maximum, a PASS is reported; otherwise a FAIL is reported.
7. 1314, 1315, 1316:
  1. Linear Magnitude shall be verified to conform to published specification. Conformity statements to the specification are based on “Simple Acceptance” with the tolerance limit being set as the acceptance limit with a TUR constraint ranging from 1:1 to 4:1.
  2. Calibrated RF Power is reported as Pass/Fail based on a guard-banded test limit. The guard-banded test limit will provide a probably of false pass of less than 2.0%.
8. 710, 720, and 730:
  1. Incoming test results are reported as Pass/Fail based on compliance with a guard-banded test limit. The test limit is guard-banded to provide a probability of a false pass of less than 2.0%.
  2. Outgoing test results are reported as Pass/Fail based on compliance with a guard-banded test limit. The test limit is guard-banded to provide a probability of a false pass of less than 2.0% and additionally guard-banded to allow instrument drift over the course of the manufacturer recommended calibration interval.
9. 5540:
  1. Test Results are reported as Pass/Fail based on compliance with a guard-banded test limit. The test limit is guard-banded to provide a probability of a false pass of less than 2.0%. Measurements within the guard-banded test limits are reported as “pass”. Measurements within specification, but outside of the guard-banded test limits are reported as “conditionally passed”. Measurements outside of specified limits, but within when considering the addition of the guard-banding are reported as “conditionally failed”. Measurements outside of specification even with the addition of the guard-banding are reported as “failed”.
10. 2601, 2602, and 2604:
  1. Incoming calibration factors are reported as in-tolerance or out-of-tolerance based on the difference in reported calibration factor between the test being reported and the most recent test for which TEGAM has records. This comparison is intended to catch large changes in calibration factor that could be caused by excessive drift or damage. The magnitude of the difference between the current and the previous measurement is compared with the RSS combination of the k=2 uncertainty of the two tests, plus a 0.5%/year calibration factor change allowance. In-tolerance is reported if the magnitude difference is less than the combined uncertainty plus the change allowance; otherwise out-of-tolerance is reported. Additionally, out-of-tolerance is reported if the calibration factor is below the minimum allowed calibration factor, if such a specification exists for this model. When a specification does exist, conformity statements to the specification are based on “Simple Acceptance” with the tolerance limit being set as the acceptance limit with a TUR constraint ranging from 1:1 to 4:1.
  2. Outgoing calibration factors are reported as in-tolerance when the minimum calibration factor is met, if such a specification exists for this model. When a specification does exist, conformity statements to the specification are based on “Simple Acceptance” with the tolerance limit being set as the acceptance limit with a TUR constraint ranging from 1:1 to 4:1.
  3. Tests are conducted to measure rho magnitude to verify that the device meets manufacturer’s specifications for maximum reflection. Magnitude is reported with uncertainty. The in-tolerance/out-of-tolerance conclusion compares the magnitude of the reported reflection coefficient with the maximum allowable reflection from the most recent TEGAM specification for the product. When a specification does exist, conformity statements to the specification are based on “Simple Acceptance” with the tolerance limit being set as the acceptance limit with a TUR constraint ranging from 1:1 to 4:1. If the measured magnitude is less than the specified maximum, a PASS is reported; otherwise a FAIL is reported.