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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The range within which the temperature input can be altered upscale and downscale without registering a change on the instrumentation.

In addition, a documented preventive maintenance program shall be in effect. An instrument that is portable, that meets the requirements of Table 3, has calibration traceable to secondary equipment or better and is used to conduct on-site tests of thermal processing equipment.


A temporary condition such as a short or loose connection where normal temperature readout is restored shall not be considered a failed survey thermocouple. The sensor representing the hottest location per 3.

Normally used to calibrate secondary instrumentation. The process of adjusting an instrument or compiling a deviation chart so its reading may be correlated to the actual value being measured.

Observed control or recording instrument reading? It is normally one-half the numerical value of the dead band, such as: The cut-to-length finished assembly consisting of thermoelements having one end joined in a measuring junction, contained within and electrically isolated from, a protective sheath closed at the measuring end.

Instruments shall be calibrated by NIST or an equivalent national standards organization, or against standards whose calibration is traceable to NIST or other recognized national equivalent s according to Table 3.

A test or series of tests where calibrated field test instrumentation and sensors are used to measure temperature variation within the qualified furnace work zone prior to and after thermal stabilization. The term furnace includes ovens.


An instrument connected to a controlling, monitoring, load or recording sensor that indicates process equipment temperature. A furnace may have multiple qualified operating temperature ranges. Change of combustion pressure settings from original setting? The timer reset screen shows the next suggested date for SAT and TUS depending on Furnace class, material and instrumentation type, or provide a date one month in the future for Control TC or Instrument calibration.

The product analyzed shall be one whose properties are sensitive to variations in heat treating temperature and whenever possible, one that is heat treated frequently. For all aluminum alloy solution heat treating air furnaces, when the heat source e.

If the furnace is prestabilized, data collection shall begin as soon as the test load or rack is loaded in the furnace. Burner size, number, type, or location change? No TUS sensor failures at the corner locations of the work zone are permitted.

When testing a portion of the work zone volume incrementally, the entire volume is measured as the TUS sensors traverse through the furnace.

A calibrated and traceable sensor with known deviations, if any, used for system accuracy tests. Survey with 24 to 39 sensors 4 failures? If a 2-step treatment is required, it is permissible to perform the second step on the samples separately from the remainder of the lot e. If subsequent internal instrument adjustments or offsets are made to achieve TUS requirements, these internal adjustments or offsets must be applied during subsequent SATs per 3.

Recalibration of the out-of-tolerance instrument. In the case of Instrument type A and B, there would be one additional load sensor. System Accuracy Test Procedure …………………………………………….

Multiple Qualified Operating Temperature Ranges …. A mass of material equivalent to the heat transfer characteristics of the thinnest section of the part being heat-treated. Connectors, plugs, jacks and terminal strips are permitted if they are the compatible type, i. The instrument may or may not also record temperature. Sensors whose only function is over temperature protection do not need to be recorded.


The issue of the following documents in effect on the date of the purchase order forms a part of this specification to the extent specified herein. If no recurrent temperature pattern is detected, readings at subsequent locations shall be taken at intervals of two minutes or less, for a minimum of six minutes at each test location.

Identification of the sensor being tested? Change of furnace pressure settings damper system from original settings? Documentation of any adjustment offset is a requirement.

thermocouples AMS | Pyrocontrole

Control, monitoring, and recording sensors shall comply with Table 1. This can be changed by selecting this button and changing the date using the on screen date selection.

The system must create write-once, read only electronic records that cannot be altered without detection. Examples include replacement of the thermocouple and recalibration of the instrument when any adjustment has been made. Quality Assurance shall be consulted for direction on whether specific maintenance requires a new SAT.

Calibration accuracy and frequency requirements shall be in accordance with Table 3. A conforming corresponding test shall be required as evidence of adequate corrective action.

It is permissible to use individual thermocouples from the roll if they are calibrated in accordance with Table 1. Process instruments of thermal processing equipment shall not be used to record TUS sensor data.

AMS2750D Standards Compliance with X-Series Recorders

The effect of this adjustment over the entire operating temperature range shall be evaluated. Standard used during calibration? The equipment shall be stabilized at the test temperature. Plane perpendicular to the conveyance direction in a continuous or semicontinuous furnace. Readings shall be identified as corrected or uncorrected. Examples are an indicating device, chart recorder, electronic 2750r recorder or a data acquisition system. Offset as found and as left as required?