When these models are used for TUS work, the Yokogawa TUS Report software will separately show TC and recorder correction factors, and allow either corrected or non-corrected data to be used in the report calculations. Yokogawa provides a range of highly reliable and secure electronic recording systems that are ideal for continuous and batch recording, as well as Temperature Uniformity Survey work.
Panel mount and portable models are available and all include universal inputs that measure a wide range of thermocouple and RTD temperature sensor types, plus DCV, mA, and DI process inputs. Data is securely saved in a proprietary binary file format to non-volatile flash memory and convenient Compact Flash, SD memory, or USB media is used to transport these files to the PC environment for reporting.
All models include standard Ethernet connectivity that supports automatic file transfers to an FTP transfer, email messaging, web browser viewing, and more. Free software is included that supports system configuration, file viewing and printing, and file conversion to ASCII and Excel file formats. Optional software is available for real-time data acquisition and temperature uniformity survey report generation.
DX and GX series data acquisition stations feature an Advanced Security option that provides system access log-in, audit trail, and electronic signature functions. As standard, they provide batch recording and extensive text message entry functions that allow operators to apply useful text information to the saved data records.
These all-in-one measurement, display, and electronic recording systems are the ideal upgrade solution for a fully AMSF- compliant batch or continuous process recording system. They can also input batch information, descriptive text messages, and with the Advanced Security option, review and electronically sign batch records. Free software is provided for analysis, reporting, and printing of the secure, tamper-proof data records. Custom reports in PDF or Excel file formats that supplement primary data recording functions are supported, and optional data acquisition and reporting software with automatic printing is also available.
Panel mount GX series models:. Portable GP series models have a carry handle and plug-in power cord, and their portability makes them ideal for TUS work. Models are:. DXAdvanced data acquisition stations provide a traditional key-operated user interface and brilliant color display graphics.
Panel mount models are:. This system is DIN-rail or surface mount with scalable input capacity from 10 to channels on a single system. A multi-unit configuration can support as many as input channels in one system. GM10 is easily configured using a web browser that also supports real-time data monitoring. GM10 is the ideal data acquisition choice for monitoring and data logging applications that do not require an integral display and user interface. It then reviews the target data file containing the temperature data and automatically calculates compliance with the assigned settings and limits.
A pass or fail report is then generated that is ready for printing and submittal. I will get more into that subject as I progress. One definition I would like to point out is paragraph 2. The placement of this definition and table will help both heat treaters and auditors understand the frequency of testing in detail when examining due dates of testing. Previously, this had the potential to be interpreted in several different ways, whereas now it cannot be.
This is one of the many positive changes within AMSF. There are now specific limitations regarding permitted error and composition. While it does not seem RTDs are used as often as thermocouples, it is important for those who use RTDs to ensure their existing thermocouples conform to AMSF and that procedures address the new requirements.
A change that seems to have gotten attention is the elimination of standard limits for base metal thermocouples. Previously, quite a few suppliers would only order special limit wire, as having both standard and special limit wire in a production facility posed the risk of some thermocouples that met only standard limit error to be used for, say, an SAT test that requires special limit wire.
For this reason, I cannot see this change posing too great a burden on the industry. In fact, it seems to make sense, considering the procurement of thermocouples in the last six years.
The next major change is the definition of expendable and nonexpendable thermocouples. Previously, the definitions were as follows simplified, of course : Expendable thermocouples are those that are covered in plastic or fabric insulation and nonexpendable were all others. This is not the case any longer see Table 1. Now, an expendable thermocouple is one where any portion of the thermal element is exposed to the thermal process environment.
Anything other than that is considered a nonexpendable. This table should be considered when suppliers begin to question whether the thermocouples currently in service apply to the new definition. A change made that was based on Nadcap requirements is the inclusion of multiple methods to find a correction factor not stated on a thermocouple or test instrument certification. With AMSF, processers are now permitted to use either linear interpolation or selection of a correction factor based on the nearest test point.
The key to this is potentially threefold:. If not using the linear interpolation method, identify what you will do when the temperature being used falls directly in the middle of two test points. Document which method will be used and use it consistently on both thermocouple certifications as well as test instrument certifications.
Additional items have been added to what is required to be on the thermocouple calibration report. These new items are extensive, and I will not be going into each one. For the most part, thermocouple suppliers already had these items on the certifications.
The one item less likely to be on thermocouple certifications claiming conformance to AMSE is a statement of initial calibration or recalibration. As stated, the majority of the new items required on thermocouple certifications were already on most industry certifications, with the exception of initial or recalibration.
The portions of J and K do not necessarily add up to anything new. They were already part of the pyrometry reference guide for AMSE, so those suppliers who were Nadcap accredited before the release of AMSF should ideally already be in compliance. The changes within the instrumentation section of AMSF may have a bit more of an impact than those within the thermocouple section. Test instruments must also have minimum readability of 0.
Not all test instruments have the ability to accomplish this. Suppliers should look for this. Another major change within the instrument section is the calibration of clocks and timers within digital recording systems. We should all agree that this is a long time coming. Timing within heat treating, especially for more sensitive materials such as nonferrous metals, is critical.
It should go without saying that you cannot calibrate a furnace recording timer system with a stop watch that is not calibrated. Of course, this will be up to the supplier to interpret, establish, and prove.
Instrument calibration sticker requirements have small changes, one being that the furnace or instrument number must be identified on the sticker Figure 1. The other is that identification of limitations may be spelled out on the instrument calibration certification. This is not a new allowance; it was previously in the pyrometry reference guide. The instrument calibration certificate contains quite a few new requirements. The more major changes are within paragraph 3.
Portions of g, h, and i are new, although small additions have been made to those paragraphs. This new instrumentation type is simply Type D with the addition of a recording sensor that is within 3 inches of the control sensor and must be of a different sensor type Figure 2. Those already familiar with AMS will recognize that 3-inch requirement and relate it to an SAT thermocouple requirement.
The SAT section seems to have gotten the most attention so far. Rounding The remaining sections are: 4. Quality assurance provisions 5. Preparation for delivery 6. Acknowledgement 7. Rejections 8. Notes 3.
Some key bullets from that section: The AMSE standard specifies the thermocouple sensors to be used, as well as the sensor wire types. Correction factors may be used to compensate for the errors found in calibration. The temperature range for the sensors used. Allowance to use wireless transmitters. Contents of a sensor calibration certificate.
The max number of usage of thermocouples in different temperatures. Types of thermocouple sensors to be used, the use for thermocouples primary calibration, secondary calibration, sensor calibration, TUS, SAT, installation, load sensing , calibration period for thermocouples, and maximum permitted error. Instruments need to be traceably calibrated. Specifications for electronic records.
SAT test records shall include: identification of sensor calibrated ID of reference sensor ID of test instrument date and time set points readings of furnace under test test instrument readings test sensor correction factors corrected test instrument reading calculated system accuracy difference an indication of acceptance or failure who performed the test signature quality organization approval 3. An example customer case story Here's an example case story of company Trescal, UK.
Download the free white paper You can download the free pdf white paper by clicking the picture below: Beamex solutions for AMSE Beamex offers various temperature calibration products that can be used and are being used in an AMSE environment. You can find the detailed information of our offering on our website in the below link: Beamex temperature calibration products Please contact us for information on how our products can be used in an AMS environment.
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