AMS2750 (revF). C3 delivered the goods.
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C3 Data: Furnace Compliance, Reimagined
Table of Contents
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- C3 Data: Furnace Compliance, Reimagined
- SENSORS
- INSTRUMENTS
- OFFSETS
- THERMAL PROCESSING EQUIPMENT
- SAT (SYSTEM ACCURACY TEST)
- 3.4.1.3 (SAT: Control & Recorder, Integrated)
- 3.4.2.2 (SAT: After correction offset changes)
- 3.4.3.1.1 (SAT: Multiple Operating Ranges)-Test Interval
- 3.4.7.1.1 (SAT: Multiple Operating Ranges)-Annual Requirement
- 3.4.7.4.3 (SAT: Resident Sensor)-Affixed
- 3.4.7.4.4 (SAT: Resident Sensor)-Over-Temp
- 3.4.11.1 (SAT: REPORTS)
- ASAT (ALTERNATE-SAT)
- TUS (TEMPERATURE UNIFORMITY SURVEY)
- ROUNDING
- QUALITY ASSURANCE
SENSORS
Table 1 (Sensors & Sensor Calibration)
Tolerance Formulas for Sensors have changed (per Table 1)
SAT, TUS, Control/record and Load sensors now all have the same tolerances as shown here: Type R, S: ±1.0 °F or ±0.6 °C or ±0.1% Type B: ±1.0 °F or ±0.6 °C or ±0.25% Base metal: ±2.0 °F or ±1.1 °C or ±0.4%
All base metal sensors must be ‘Special Limits’ with the following exceptions:
NOTE:11: For Types E and T only, temperatures <32°F (<0°C), shall have the following calibration accuracy: Type E:-328 to 32°F, ±3.0°F (-200 to 0°C, ±1.7°C), or ±1.0% for either, whichever is greater TypeT: -328 to 32°F, ±1.8°F (-200 to 0°C ,±1.0°C), or±1.5% for either, whichever is greater
NOTE: 13: When correction factors are used: Type B load sensors: shall meet calibration accuracy of ±2.7°F (±1.5°C) or ±0.5% Types R and S load sensors: shall meet calibration accuracy of ±2.7°F (±1.5°C) or ±0.25%
How does C3 handle this change?
C3 includes these new sensor tolerance formulas. No action required by C3 users.
Table 2 (Sensor & extension wire/connector)
Thermocouple types: ‘C and ‘M have been added to the list of thermocouple types. Type ‘C is considered to be ‘Nobel Metal’ Accuracies for these thermocouple types are listed in Table 1
How does C3 handle this change?
C3 includes these new sensor types and their associated calibration accuracies. No action required by C3 users.
Table 5 (Sensor reuse & recalibration)_CONTROL & RECORDING
This table has been expanded to include ‘Control & Recording’ sensors, and goes on to state that: these sensor types must be replaced in accordance with 2.2.42, 3.1.4.4, 3.4.8 and 3.4.9.
How does C3 handle this change?
C3 includes the ability to for users to enter the replacement interval of each of their Control & Recording sensors based on whatever your internal procedures dictate.
Tables 5 & 6 (Sensor reuse & recalibration)_ALL OTHER SENSOR TYPES
Sensor types (other than Control & Recording) have also been updated with new rules surrounding their expiry based on date and/or number of uses at various temperatures.
How does C3 handle this change?
C3 will automatically track usage and expiry of all thermocouple types (K, N, S, R, T, J…) and all use cases (SAT, TUS, Resident-SAT, Load*, etc), and all forms (expendable & non-expendable).
No action required by C3 users.
*HOWEVER: Load sensor usage tracking will be released as an optional app module (release phase-2).
Section 3.1.4.8 (Interpolation of Sensor Correction Factors)
Interpolation of correction factors [of sensors] between two known calibration points is permitted using the linear method.
How does C3 handle this change?
C3 uses linear interpolation between two known sensor calibration points. No action required by C3 users.
INSTRUMENTS
Table 7 (Instrument & Instrument Calibration)
All tolerances must now include one decimal place.
How does C3 handle this change?
C3 automatically uses one decimal for all tolerances. No action required by C3 users.
3.2.5.1 (Calibration: LABELS)
A label affixed to or in close proximity to the instrument shall indicate the most recent successful calibration. As a minimum, the label shall include:
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- (NEW) Instrument number or furnace number.
- Date the calibration was performed.
- Due date of the next calibration.
- Identification of the technician who performed the calibration.
- (NEW) Indication if any limitations or restrictions of the calibration. If space on the label does not permit listing of the limitations or restrictions, a second label in close proximity to the instrument or a notation such as “see report” is acceptable.
How does C3 handle this change?
C3 provides a feature where users can customize their calibration labels to always include these two new requirements.
3.2.5.2 (Calibration: REPORTS)
The results of instrument calibration shall be documented. As a minimum, the documentation shall include:
- (NEW) Unique identification of the instrument.
- Make and model of the instrument calibrated.
- Unique Identification of the test instrument used during calibration.
- (NEW) Identification of each sensor type in use (e.g., type K, N, etc.) and form (e.g., V, mA, etc.) if the instrument is used for these scales.
- (NEW) Identification of location where signal was input (only required for measurement systems employing the alternate SAT).
- Required calibration accuracy.
- As-found data at each calibration point and as-left data if any adjustments are made, to include:
- (NEW) Nominal test temperature.
- (NEW) Error of test instrument (optional or when specified by the customer).
- (NEW) Error of instrument under test (corrected or uncorrected for test instrument error when specified).
- Correction and modification offsets as-found and as-left in accordance with 3.2.6
- Sensitivity, pass/fail (applicable to analog instruments only).
- Instrument calibration pass or fail statement.
- Any limitations or restrictions of the calibration.
- Date the calibration was performed.
- Due date of the next calibration.
- (NEW) Statement of traceability to NIST or other internationally recognized standards organization.
- Identification of the technician who performed the calibration.
- Identification of the calibration agency if calibration is not performed internally.
- Approval of an authorized agent for the calibration agency if performed by a third party.
- User quality organization approval.
How does C3 handle this change?
C3 auto-generates Instrument Calibration Reports to include these and all other required variables.
OFFSETS
3.2.6.1 (Instrument Corrections & Modification Offsets)-GENERAL
3.2.6.1.2 The maximum cumulative correction offset shall not exceed the uniformity tolerance for the thermal processing equipment or ±5.0 °F or ±2.8 °C for refrigeration and quench instruments. (e.g., a class 2 furnace instrument is limited to a maximum correction offset of ±10.0 °F or ±6.0 °C).
3.2.6.1.3 Instrument correction and/or modification offsets may be either internal (electronic) or external (manual), and shall be included in the calibration, SAT, and TUS documentation.
3.2.6.1.4 Controlling instrument modification offsets for TUS shall not exceed the allowances in Tables 18 or 19. SAT modification offsets are not allowed.
3.2.6.1.5 Control and recording instrument correction offsets for SAT shall not exceed the allowances in Tables 18 or 19. TUS modification offsets are not permitted on recorder channels other than for the channel recording the control sensor temperature.
How does C3 handle these changes?
C3 helps track & manage all of your correction & modification offsets in the portal at the Instrument Setup level.
Users only need to define their correction offsets for each instrument and C3 will ensure that those correction offsets do not violate these new requirements. Future changes to your correction offsets can be made either via the portal and/or the mobile app.
C3 will also force user behavior when performing Instrument CAL, SAT, and TUS jobs so that all required correction & modification offsets are always included in the calibration, SAT, and TUS documentation.
THERMAL PROCESSING EQUIPMENT
Table 11 (Furnace Class Uniformity Tolerances)
(NEW) Note (1): Some design authorities require temperature uniformity tolerances of ±5.0°C and ±7.0°C for class 2 and class 3, respectively.
How does C3 handle this change?
How does C3 handle this? 
Table 12 (Instrumentation type requirements)
As Table 12 illustrates, Instrument Type D+ has been added.
How does C3 handle this change?
C3 has been updated to include the new Instrument Type: D+. The requirements (test frequencies, etc) of this new Instrument type automatically flow down into all existing areas of pyrometry within the C3 system.
SAT (SYSTEM ACCURACY TEST)
3.4.1.3 (SAT: Control & Recorder, Integrated)
When the control and recording systems are integrated such that the digitally displayed control value and the digitally recorded value are generated from the same measurement circuit and cannot be different, it is only necessary to document a single displayed/recorded value for the SAT..
How does C3 handle this change?
C3 allows you to toggle OFF the SAT requirement for either the controller or recorder.
If you prefer to exercise this new option then they you only need to toggle OFF the SAT requirement for one of these two systems.
3.4.2.2 (SAT: After correction offset changes)
An SAT shall be performed after any activity that could affect the SAT accuracy [to include introducing, removing or altering an existing correction offset during instrument calibration].
How does C3 handle this change?
In the event that a C3 user attempts to introduce, remove or alter any correction offset values, the app will warn the user that doing so will require that an SAT be performed on the equipment prior to allowing the equipment to be used in production..
3.4.3.1.1 (SAT: Multiple Operating Ranges)-Test Interval
For furnaces with multiple qualified operating temperature ranges, the SAT shall be performed in accordance with the most stringent interval for the furnace class used..
How does C3 handle this change?
C3 always has and will continue to enforce this newly stated requirement..
3.4.7.1.1 (SAT: Multiple Operating Ranges)-Annual Requirement
For furnaces with multiple qualified operating temperature ranges, a periodic SAT shall be performed in each range at least annually..
How does C3 handle this change?
When performing SATs throughout the year, mobile app users will be automatically notified as to which operating ranges still need testing. This notification will become more persistent as the annual deadline approaches.
3.4.7.4.3 (SAT: Resident Sensor)-Affixed
The resident SAT sensor shall be affixed in position to an assembly to prevent movement in relation to the sensor under test. Position shall be verified on installation and replacement. Alternatively, the resident SAT sensor may be located independently of the sensor under test and its position shall be verified before each test to ensure that it has not moved between sensor installation events..
How does C3 handle this change?
C3’s Instrument Setup has a new field that defines whether or not the Resident SAT sensor is affixed in position. When defined as: Not affixed, the mobile app user collecting SAT data will be prompted to verify the position prior to each SAT test.
When the app user verifies position this verification is automatically recorded on the SAT report.
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3.4.7.4.4 (SAT: Resident Sensor)-Over-Temp
It is permitted to use the over-temperature sensor as the resident sensor provided it is used only for over temperature safety and meets all of the requirements of an SAT sensor, 3.4.7, and Table 16.
How does C3 handle this change?
To exercise this new option simply navigate to the Instrument Setup screen and assign the Hi-Limit sensor as your Resident SAT sensor.
3.4.11.1 (SAT: REPORTS)
The results of the comparison SAT shall be documented. At a minimum, the documentation for each sensor system tested shall include:
- Identification of the sensor system being tested.
- (NEW) Identification of the SAT Sensor and depth of insertion when type K or E is used.
- Identification of the SAT instrument.
- Date and time of the SAT.
- Set point of the furnace during the SAT.
- Observed control or recording instrument readings and recordings.
- Observed SAT instrument readings.
- SAT sensor correction factor at the applicable set temperature.
- The correction factor of the SAT instrument at the applicable set temperature.
- Corrected SAT instrument reading.
- Calculated SAT difference (control and recording instrument readings minus the corrected SAT instrument reading).
- (NEW) As-found and as-left correction and/or modification offsets if used during production.
- SAT difference pass or fail statement.
- Identification of the technician who performed the SAT.
- Identification of the agency if SAT is not performed internally.
- Approval of an authorized agent for the calibration agency if performed by a third party.
- User quality organization approval.
How does C3 handle this change?
C3 auto-generates Instrument Calibration Reports to include these and all other required variables.
ASAT (ALTERNATE-SAT)
IMPORTANT!: Alternate SAT Reports in revF now require that they be reviewed & approved by quality personnel. Therefore all Alternate SAT reports will flow trough the ‘Tests’ scree (just like all other job types: CAL, SAT and TUS). Otherwise the automated process in which Alternate SAT Reports have always been generated has not changed.
3.4.8.3 (ASAT: Documentation/Report Frequency)
Documentation of Alternate SAT shall be made at the shorter of sensor replacement interval or instrument calibration interval.
How does C3 handle this change?
C3’s automated Alternate-SAT reporting feature automatically creates the Alternate-SAT reports on the shorter of the replacement interval or instrument calibration.
3.4.8.4 (ASAT: Calculations across Operating Range)
Alternate-SAT calculations to be done at each temperature on the instrument calibration report
(aka: across Qualified Operating Range).
How does C3 handle this change?
C3’s automated Alternate-SAT reporting feature automatically creates calculations at each temperature on the instrument calibration report.
3.4.11.2 (ASAT: REPORTS)
Requirements for Alternate-SAT reports have now been defined and require the following variables:
- Identification of the sensor system being tested.
- Identification of the sensor or roll.
- Date and time of the alternate SAT.
- Method Used:
- Sum of calibration errors or correction factors (see 3.4.8.2.1).
- Correction factors applied manually or via programming (see 3.4.8.2.2).
- Limit instrument/thermocouple calibration errors or correction factors such that SATis always met (see 3.4.8.2.3).
- Final SAT results calculated for the method used with supporting documentation/test reports, as required
- Identification of the technician who performed the alternate SAT, as applicable.
- Identification of the agency if the alternate SAT is not performed internally.
- Approval of an authorized agent for the agency performing the alternate SAT if performed by a third party.
- User quality organization approval.
- Due date of the next calibration.
- tatement of traceability to NIST or other internationally recognized standards organization.
- Identification of the technician who performed the calibration.
- Identification of the calibration agency if calibration is not performed internally.
- Approval of an authorized agent for the calibration agency if performed by a third party.
- User quality organization approval.
How does C3 handle this change?
C3 Data’s auto-generated Alternate SAT reports include all of these variables..
TUS (TEMPERATURE UNIFORMITY SURVEY)
3.5.8.6 (TUS: Vacuum Furnaces, Partial Pressure)
For vacuum furnaces operated in both vacuum (no gas) and in partial pressure (with backfill gas) during production, one of the periodic TUS shall be performed at least annually at one single operating temperature and within the partial pressure range used in production. The gas used shall be one of the gases used during production..
How does C3 handle this change?
C3’s Furnace Setup screen has been expanded to enable users to define furances that run under vacuum & paritial pressure w/backfil gas.
C3 automatically tracks your historical TUS tests performed under vacuum & partial pressure. Each time a TUS is performed C3 will inform the user when the next periodic TUS performed under these conditions is due.
3.5.10.1 (TUS: Data to begin >100ºF/55ºC)
Data collection shall begin when the temperature of all TUS and furnace sensors are no less than 100 °F or 55 °C below each survey temperature so that any TUS or furnace sensor failing to reach the lower TUS tolerance or exceed the upper TUS tolerance can be detected. For test temperatures of 200 °F or 93 °C and below, data collection shall begin at the ambient temperature of the furnace or refrigeration equipment prior to the start of heating (or cooling for refrigeration equipment). If the furnace or refrigeration equipment is pre-stabilized, data collection shall begin prior to the TUS sensors being inserted.
How does C3 handle this change?
C3’s TUS module automatically checks the ‘Start Monitoring’ time of your TUS, and determines whether or not this new requirement was met.
If you fail to meet the new requirement, C3 will warn the user and give them the opportunity to re-run the TUS.
3.5.10.6 (TUS: Minimum Stabilization Time)
At no time shall any TUS, control, or recording sensor exceed the upper TUS tolerance. The equipment shall be held at the TUS temperature until all TUS sensors have stabilized (see 2.2.71). After stabilization, data collection shall continue for a minimum of 30 additional minutes.
How does C3 handle this change?
Although this is not a new requirement in AMS2750 revF, C3 has enhanced its TUS module to optionally define a Minimum Stabilization Time for each operating range (at the Furnace Setup level).
If you define your furnace operating range to have a Minimum Stabilization Time of 30 minutes, the TUS software will automatically enforce this requirement for all future TUS for that furnace at that operating range. The enforcement occurs when the green stabilization lines are being drawn. If you attempt to draw the green vertical lines at a time <30 minutes the software will immediately notify you of the violation and will not allow the TUS to pass until the time between the two green lines = 30 minutes or greater.
3.5.15.2 (TUS: Hot/Cold Locations)-Relocate?
The hot and cold recording sensors do not require relocation if either of the following conditions is met:
3.5.15.2.1 The temperature uniformity results do not exceed one half of the maximum temperature uniformity tolerance for the applicable furnace class at all temperatures surveyed. The intent of this requirement is that the TUS results do not exceed 1/2 of the uniformity tolerance in either direction from the set point temperature.
3.5.15.2.2 The difference between the measured temperature at the current hot and cold recording sensor locations and the actual respective hottest and coldest measured locations is less than the maximum SAT difference for the applicable furnace class (see Tables 14 and 15). The intent of this requirement is that the maximum and minimum TUS sensor readings during the 30 minute TUS soak, recorded and corrected by the TUS recorder, are compared to the furnace recording of the current hot and cold recording sensors at the same time, and must not exceed the applicable SAT tolerance.
How does C3 handle this change?
Each Furnace whose Instrument Type = A or C now has new fields that define the hottest and coldest thermocouple locations. These locations are defined at the furnace’s individual Operating Ranges.
C3 addresses 3.5.12.2 by leveraging powerful new features built into the TUS module. These new features include automatic analyzation of the TUS data for both scenarios (3.5.15.2.1 and 3.5.15.2.2) to determine for you if the location of your hottest and/or coldest thermocouple need changed.
By analyzing your TUS data we are able to determine for you if the TUS results exceed 1/2 the uniformity tolerance in either direction from the set point. If exceeded, C3 notifies the user and automatically analyzes the TUS data once again to determine if the difference between the measured temperature at the current hot and cold recording sensor locations and the actual respective hottest and coldest measured locations is less than the maximum SAT difference for the applicable furnace class.
In the end, C3’s TUS module definitively determines if relocating the High and/or Low thermocouple is required and makes that determination abundantly clear to you. If it is determined that relocation is necessary C3 automatically updates your new location(s) for you in the applicable furnace operating range. These new locations will carry forward automatically for the subsequent TUS.
3.5.16 (TUS: REPORTS)
The results of the TUS shall be documented. At a minimum, the TUS documentation shall include:
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- Furnace identification name or number.
- (NEW) Identification of TUS as initial or periodic.
- TUS instrument unique identification number.
- (NEW) TUS sensor(s) batch or lot number.
- TUS set point temperatures.
- (NEW) Control instrument tuning constants.
- (NEW) TUS sensor calibration report.
- (NEW) TUS instrument calibration report.
- (NEW) TUS, control, and recording sensor location identification required by the applicable instrumentation type including a detailed diagram, description, or photograph(s) of any load, rack, or fixture used.
- (NEW) The atmosphere used.
- Time and temperature data from all recorded sensors required for the instrument type for all qualified work zones surveyed.
- (NEW) Correction factors for the TUS sensors and TUS instrument at each TUS temperature. The TUS instrument correction factors shall be stated even when the correction factors have been electronically applied to the TUS instrument to correct the TUS instrument temperature readings.
- As-found and as-left TUS offsets if used during production.
- Corrected or uncorrected (if documented) readings of all TUS sensors at each TUS temperature. TUS readings shall be identified as corrected or uncorrected.
- (NEW) Load condition; i.e., empty, with a rack, or with a load.
- TUS start date and time (when temperature data collection began).
- TUS end date and time (when temperature data collection ended).
- (NEW) The results of hottest and coldest TUS and furnace recording sensor relocation analysis for type A and C instrumentation, as applicable.
- (NEW) Traverse speed(s) or shaker frequency for the TUS performed on continuous and semi-continuous furnaces, as applicable.
- TUS pass or fail statement.
- When applicable, documentation of any control, recording, or TUS sensor failures.
- Summary of the corrected plus and minus TUS readings at each test temperature during the minimum soak period.
- Identification of the technician performing the TUS.
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How does C3 handle this change?
C3 auto-generates Instrument Calibration Reports to include these and all other required variables.
ROUNDING
3.8.2 (Rounding: ASTM E29, Absolute Method)
Rounding to the number of significant digits imposed by the requirement is permitted in accordance with ASTM E29 using the absolute method or other equivalent international standards..
How does C3 handle this change?
As allowed by (3.8.2) C3 Data utilizes ASTM E29 rounding using the absolute method. Out-of-tolerance test data is never rounded into tolerance. Rounding is only ever applied to the final calibration or test result.
3.8.4 (Rounding into Tolerance)
All specified limits in this specification are absolute and out of tolerance test data cannot be rounded into tolerance.
How does C3 handle this change?
As mentioned in section 3.8.2 of this document, C3 Data utilizes ASTM E29 rounding using the absolute method, and any out-of-tolerance test data is never rounded into tolerance. Rounding is only ever applied to the final calibration or test result.
3.8.5 (Rounding: Final Calibration Result Only)
Rounding must only be applied to the final calibration or test result.
How does C3 handle this change?
C3 only applies rounding to the final calibration or test result.
QUALITY ASSURANCE
Table 25 (Calibration/Test Interval Extension)
(Note-1): All extensions must be documented with written justification and approved by the user quality organization.
How does C3 handle this change?
This requirement is one of very few that will be addressed in phase-2 of our AMS2750-F. Here is a sneak peak of how this will be handled in your C3 account…
Note-1 shown in Table 25 (above) requires that when the QA is approving a test that was performed after the DueDate, that the QA must document why the test was performed late.
Process Flow: In phase-2 C3 will be smart enough to flag the QA during the approval process if/whenever this condition arrises. C3 will prompt (require) that the QA provide a reason for the delay in testing and we will then put that documented reason in the report itself. In C3 this will apply to these test types only: CAL, SAT, TUS. It will NOT apply to Alternate-SATs since Alternate-SAT reports are fully automated and therefore will never technically “late”.
Phase-2 will also address these additional areas as they relate to allowable extensions beyond due dates:
• The Dashboard will not turn your furnace red until the extension period has expired.
• CAL & SAT app will allow a Standard that is within the extension period to be used.
The process flow described above will also incorporate the ability for the QA to add notes specific to the job that is being approved. This will help facilitate a one of our more popular requests which is for Quality personnel to have the ability to assign an internal NCR number and any associated notes to the particular test and have that NCR number and information that was typed in permanently attached to that job/test record and have it be readily retrievable on an as needed basis.
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