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A. If your organization has inspections or audits, your authority having jurisdiction (AHJ), which may be the CDC, FDA, USDA or your state health department, might require your business to follow certain guidelines, including having a periodic certificate of calibration done for your Winland environmental monitoring equipment. This is sometimes referred to as a Certificate of Calibration or NIST traceable calibration. The National Institute of Standards and Technology (NIST), is a non-regulatory agency that promotes and maintains measurement standards.
A. You will need to communicate with your authority having jurisdiction (AHJ). Typically application such as pharmaceuticals, plasma storage and vaccine storage, require a periodic Certificate of Calibration. Food handling facilities sometimes have calibration and accuracy requirements as well.
A. A Certificate of Calibration is issued by an accredited testing lab. If your system is installed, then we would recommend Trescal for the initial certificate and renewals. If you are in the process of planning, and haven't bought your system, we would have you look at the pricing difference between purchasing pre-certified equipment from Davis vs going through your regular distributor and then having Trescal certify it after purchase. You have the option to purchase your system with the Certificate of Calibration from Davis Instruments.
For renewals we recommend having spare probes, and sending the spares to Trescal for certification,
then swapping them into service.
The process can take up to 5 to 10 business days, that does not cover shipping time.
A. All Winland probes can be "Certified" for accuracy and most, but not all, can accept a calibration "offset" to correct an inaccuracy. However, this "offset" can not be applied to the EA-WTS sensor.
Please be aware that the HA-III+, EA-WMFS, EA-WTS, or EA-WHS sensors
must not be placed in a condensing environment such as a cooler or freezer.
A. There are two options in this type of scenario.
1. Trescal does offer Field Calibration, you will need to communicate with Trescal for pricing.
2. We recommend purchasing additional probes, having those probes certified and then swapped in. The probes that you have taken out will then be sent in for certification
so you can round-robin your sensors as needed.
Trescal 704.987.4300 x1902 (William Lutz)
This should be placed next to the probe or kept in a place where it will be available to an inspector.
An Ice melting point test, is designed to verify the accuracy of a probe with low cost and items that can be setup quickly and easily and may be sufficient to satisfy your AHJ or for one's own peace of mind. However, it can not replace a NIST traceable certificate of calibration.
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