AMS 2750D PDF

The “AMS” name in the standard is an abbreviation of “Aerospace Materials Specifications”. The standard is published by SAE Aerospace, part. I am relatively new to being a provider of heat treat services and am trying to get some clarification on AMS D. The specification identifies. Does AMS D require a statement of compliance to the specification (AMS D). printed on, or provided with Certificates of Calibration for an instrument.

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AMS2750D Standards Compliance with X-Series Recorders

If additional copies are needed by other Alcoa employees, contact MQS. It covers temperature sensors, instrumentation, thermal processing equipment, system accuracy tests, and temperature uniformity surveys. These are necessary to ensure that parts or raw materials are heat treated in accordance with the applicable specification s. This specification is not applicable to heating, or to intermediate thermal processing unless specifically referenced by a material or process specification.

This specification applies to laboratory furnaces to 22750d extent specified in 3. The issue of 275d following documents in effect on the date of the purchase order aks a part of this specification to the extent specified herein.

The supplier may work to a subsequent revision of a 2750f unless a specific document issue is specified. When the referenced document has been canceled and no superseding document has been specified, the last published issue of that document shall apply. The use of this Report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefrom, is the sole responsibility of the user.

SAE invites your written comments and suggestions.

No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE.

General Sensor Information ………………………………………………….

Using Honeywell X-Series paperless recorders for compliance with AMS D standards

Thermocouple Calibration Requirements …………………………………… Thermocouple Usage …. Wire Rolls – Calibration Requirements……………………………………. Instrument Calibration also see Table 3 …………………………………… Instrumentation Records……………………………………………………….

Electronic Records — Instrumentation ………………………………………. Instrumentation Type B ………………………………………………………. Instrumentation Type C ………………………………………………………. Instrumentation Type D ……………………………………………………….

Instrumentation Type E ………………………………………………………. Instrumentation – Refrigeration Equipment …………………………………. Instrumentation – Quench Systems …………………………………………. System Accuracy Test Waiver ………………………………………………. System Accuracy Test Procedure ……………………………………………. Records — System 2570d Test ……………………………………………. Multiple Qualified Operating Temperature Ranges ….

TUS Frequency also see Tables 8 and 9 …………………………………. TUS Instrumentation also see Tables 1 and 3 ……………………………. Radiation Surveys ……………………………………………………………… Laboratory Furnaces ……………………………. Process Recorder Print and Chart Speeds …………………………………. Temperature sensors shall comply with Table 1 and the following requirements. Exclusions for specific applications shall be as listed in the following paragraphs. Thermocouples may be made either from bare or coated wire or MIMS mineral insulated, metal sheathed cable.

Unless specifically noted, requirements apply to all temperature sensor materials. Correction factors for sensors derived from their initial or subsequent calibration 275d0 be used to improve temperature accuracy and shall be amss when required by this specification.

Sensors shall have a certificate of compliance that identifies the source of the calibration data, nominal test temperature, actual test temperature readings, calibration technique, and correction factor for each calibration temperature traceable to NIST or other recognized National Standard.

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Conversion from millivolts to degrees or degrees to millivolts shall be in accordance with ASTM E or other national standard. Temperature sensors shall be calibrated in the temperature range within which they are to be used. Extrapolation of calibration correction factors above the highest calibration temperature and below the lowest calibration temperature is prohibited.

Use of thermocouples not conforming to these recommendations shall be based upon calibration and recalibration intervals required in Table 1 of this document.

Thermocouple calibration intervals specified herein, whether based on time, number of uses, or temperature are the maximums permitted. However, compliance with these intervals does not relieve the user of the responsibility for ensuring that excessive drift has not occurred under the particular conditions environment, time, and temperature of exposure.

Extension wire in new installations one year after the issue of this revision shall conform to ASTM E or national equivalent.

Extension wire shall not be spliced. Connectors, plugs, jacks and terminal strips are permitted if mas are the compatible type, i. Thermocouple composition and extension wire requirements are shown in Table 2. Thermocouples made from calibrated rolls may be used in lieu of individually calibrated thermocouples.

Rolls up to feet meters in length may be sampled at one end; rolls over feet shall be sampled at both ends of the roll see 3. Use the average correction factor calculated from both ends of the roll if the individual correction factors from each end are within acceptable limits of Table 1.

The roll calibration method shall not be used for rolls over feet meters if the difference between the highest and lowest calibration readings of the sample thermocouples at any calibration temperature exceeds the requirements in 3. For rolls not meeting 2750c. It is permissible to divide the roll into shorter length rolls that do meet the 275d0 to end tolerance specified in 3.

It is permissible to use individual thermocouples am the zms if they are calibrated in accordance with Table 1. Reuse of any thermocouple is prohibited unless the insulation remains intact and wires including the hot junction are not damaged.

If the salvaged thermocouple originated from a calibrated wire roll, the original roll calibration may be used in lieu of recalibration.

The number of uses prior to salvage shall be included in the total number of uses of the thermocouple.

Reuse is permitted so long as “U” in the following formula does not exceed The reference standard sensor together with a primary standard instrument shall be used to calibrate primary standard sensors. Primary standard sensors shall comply with Table 1. A primary standard sensor together with a primary standard instrument shall be used to calibrate secondary standard sensors.

Secondary standard sensors shall comply with Table 1. Use shall be limited to calibration of temperature uniformity, system accuracy, controlling, monitoring, recording, and load sensors. Temperature uniformity survey sensors shall comply amd Table 1.

System accuracy test sensors shall comply with Table 1. Calibration of SAT sensors shall have been performed with a primary or secondary standard instrument against a primary or secondary standard sensor in accordance with Table 1. Control, amms, and recording sensors 270d comply with Table 1. Expendable thermocouples may be used, subject to the ans of 3.

When a Load Sensor is used as a Control Sensor: Calibration shall have been performed before use. Recalibration of base metal load thermocouples is prohibited see 3. Expendable thermocouples, when used as a control sensor are limited to one use. Nonexpendable load thermocouples may be used to control temperature, subject to the limitations of 3. Load sensors shall comply with Table 1. Load sensors, used for measurement of temperature of parts, simulated parts, or raw material, shall be in contact with or buried in the load during thermal processing.

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Load sensors aks be used as control sensors in accordance with 3.

When a load sensor is used as a control 27500d, no control, monitoring, or recording sensor shall exceed the maximum allowed processing temperature. Recalibration frequency of noble metal thermocouples shall be every six months after first use. Nonexpendable base metal load thermocouples may be used as specified in 3. The life of nonexpendable base metal load thermocouples shall be determined by the operating temperature s.

Records shall be maintained of the accumulated thermocouple use furnace load cycle. Maximum number of uses or maximum elapsed usage time, whichever occurs first, shall be as follows: Replacement of 27500d load sensor earlier than the required SAT frequency satisfies the SAT requirement for the load sensor. It is now subject to the 90 use limit as it has been used in a higher temperature range.

Output of sensors shall be converted to temperature readings by instruments specified herein or instruments of equal or greater accuracy. Instruments shall be calibrated by NIST or an equivalent national standards organization, or against standards whose calibration is traceable to NIST or 27550d recognized national equivalent s according to Table 3. The following requirements 3. Temperature resolution requirements for furnace chart recorders shall be in accordance with Table 4. Controlling, Monitoring, or Recording Instruments: Installation of controlling, monitoring or recording instruments shall conform to the manufacturer’s recommendations.

If offsets are used, a documented procedure shall exist, describing when and how to perform manual and electronic offsets. The 2750dd shall address how to account for and reintroduce any intentional offsets. Prior to reintroducing any intentional offsets, any instrument calibration error found shall be taken into account. Adjustments offsets greater than 250d shown in Tables 6 or 27500d shall not be used. If subsequent internal instrument adjustments or offsets are made to achieve TUS requirements, these 2750dd adjustments or 7250d must be applied during subsequent SATs per 3.

In addition, if subsequent internal instrument adjustments or offsets are made to achieve SAT requirements, the effect on the TUS range or distribution shall be considered as the range will shift upwards or downwards in response to the internal adjustment or offset.

Controlling, monitoring and recording instruments shall receive an unmodified signal from sensors except for analog to digital and digital to analog conversions, or a digitallyprocessed, error-checked 270d representation of a direct measured value. Calibration shall be performed on the instrument s listed in the Instrument Type column of Table 3. Regardless of the calibration procedure used, it shall comply with the requirements of Table 3.

Calibration accuracy and frequency requirements shall be in accordance with Table 3.

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