Tel: (outside USA). Fax: Email: [email protected] SAE WEB ADDRESS: AMS D. ®. Issued. APR Standards such as the AMS E (Aerospace Material Specifications) are applicable for the industrial processing of high-quality materials. They define. AMSD Temperature Uniformity Surveys using TEMPpoint. Background: Industrial process furnaces and ovens re- quire uniform temperature and heating; .

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This page can be found at http: They are available in a wide variety of diameters and materials Figs.

Contact Lesman sales at for further details on AMSD-compliant recorders, or read more online about Honeywell X-series advanced paperless recorders.

Expendable thermocouples are generally supplied on spools, and the insulation is present on each thermocouple wire conductor plus an overall outer insulation jacket.

Two modes in the recorder address the AMDD specification.

AMS2750D Standards Compliance with X-Series Recorders

This give an indication to when thermocouples need replacing, dependent on load cycles and other factors specified in AMSD. A second, more robust version is a mineral- insulated, metal-sheathed MIMS thermocouple. This document can then be printed and signed off by the appropriate person. These fully protected assemblies are flexible and, within the temperature limitations of the sheath material, offer enhanced life as compared to both expendable thermocouples and often beaded-ceramic nonexpendable sensors.

Noblemetal thermocouples may also be necessary based upon the class of furnace being used and the temperature uniformity range defined for the thermal-processing equipment. System accuracy test SAT sms2750d 8. Control Sensors Control sensors, like all sensors, fall into the two previously defined categories — expendable and nonexpendable.


If your process is subject to NADCAP audits, X-Series recorders can collect the data and produce survey reports to show that your temperature instrumentation is in compliance. AMS process mode is available on all X-Series recordersand requires five credits in the X-Series firmware credit system.

Call Mon-Fri 7: That said, the type and classification of thermocouples chosen — as defined in AMS D — have a dramatic effect on efficiency, thermocouple life and performance. Insulated wire serves the needs of many applications, but a detailed analysis of the benefits of MgO-style thermocouples often proves to enhance efficiencies in the world of thermal processing.

IndustrialHeating – December2010

Currently, the TUS capability works only on single zone thermal processing equipment. While a commonly used assembly, the ceramic insulators are fragile, which is why many thermal processors are moving toward an alternate style of nonexpendable thermocouple.

Process mode adds some new status screens and timers to the recorder to help with AMSD compliance of the process, giving a countdown to SAT and TUS intervals as well as control thermocouple and instrument calibration. However, in the 31 years that we have lived with the specification its reach has expanded greatly.

Honeywell X-Series paperless recorders now have features that make ams27500d easier for users to comply with AMSD standards.

Expendable vs. Nonexpendable Thermocouples: A Detailed Look at AMS D

When examining the use of expendable versus nonexpendable thermocouples, the categories of control sensors, load sensors, SAT sensors and TUS sensors each have very specific parameters as defined by AMS D. Guidelines for Use of Expendable, Nonexpendable Sensors In a wide variety of thermal-processing applications, base-metal thermocouples types T, J, K and N are often applied.


Load Sensors The use of expendable and nonexpendable thermocouples as load sensors is very specifically defined under AMS D. This will reset the next control thermocouple calibration date. AMS process is used when the recorder is attached to the process in the role of a recording device.

Thermocouples and their application are undoubtedly a large part of the most current revision — AMS D. X-Series Temperature Uniformity Survey TUS mode allows a recorder to be set up as a testing device rather than an in-process recorder, to monitor and record the temperature uniformity of thermal processing equipment per AMSD.

The scope of use of one as compared to the other varies greatly according to the specification. Nonexpendable Thermocouples While the preceding introduction gives us a very cursory glance at temperature sensor uses AMS D provides far greater detailit is necessary to take a much more in-depth look at how sensors are classified. Process mode lets you track thermocouple usages based on thermocouple type, the number of times they are used, and the temperatures they see, to determine if they are still within the AMSD specified allowable uses.

By contrast, nonexpendable thermocouples, when used as test sensors, can be used and reused for a period of 90 days regardless of the number of thermocouples or the thermal-processing operating temperature range. Nonexpendable thermocouples have a more delineated specification according to AMS 3.

However, one important variable related to drift is that these limits do vary based on the furnace class.