Moisture analysis is a delicate task that can involve a wide range of materials and substances. Because the samples are dried by heat, it's important to follow proper procedures in order to avoid burns, fumes, splatters or volatile reactions. We've compiled a number of substances their preparation methods, drying time and results in this book to help you get testing right the first time. Please make sure to take proper precautions and adjust the procedures according to desired results. Your own results may vary. These methods are meant to be a helpful guide, and do not supplant your laboratory's testing procedures.
PMB Moisture Analyzers use a single 400 watt halogen bulb to heat the sample in 1 °C selectable increments. They include three heating modes:
Ramp-up: The temperature will rise to a specific degree over a set period of time. For example, 125ºC in 10 minutes.
Single: A single temperature. The moisture analyzer will heat to a specific temperature, and stays there for the duration of the test, no matter how long it is.
Step: Heats to one temperature for a set time then to another temperature for another period of time. There are a maximum of 3 settings in the PMB. So you could set it to 100ºC for 3 minutes, 125ºC for 2 minutes and to 150 ºC for 6 minutes.
Samples often need to be processed before testing. Here are some tools you might need:
• Disposable sample pans
• Glass fiber filters
• Mortar and pestle
• Copper wire
• Wire netting
• Aluminum foil
• Paper clips
• Teflon roller
• Calibration weights