TMA Q Series Getting Started Guide
9
Sample Decomposition
The TMA is capable of heating samples to 1000°C. Many materials may decompose during the heating, which
can generate hazardous byproducts.
WARNING: If you are using samples that may emit harmful gases, vent the gases by
placing the instrument near an exhaust.
Samples should not be heated above their decomposition temperatures to prevent the relase of hazardous
materials or contamination of the TMA.
Lifting the Instrument
The TMA is a fairly heavy instrument. In order to avoid injury, particularly to the back, please follow this
advice:
WARNING: Close the furnace before moving the instrument, even for a short distance.
Use two people to lift and/or carry the instrument. The instrument is too heavy for one
person to handle safely.
Handling Liquid Nitrogen
The TMA can use the cryogenic (low-temperature) agent, liquid nitrogen, for cooling in subambient experiments.
Because of its low temperature [-195°C (-319°F)], liquid nitrogen will burn the skin. When you work with liquid
nitrogen, use the following precautions:
WARNING: Liquid nitrogen boils rapidly when exposed to room temperature. Be
certain that areas where liquid nitrogen is used are well ventilated to prevent dis-
placement of oxygen in the air.
1.
Wear goggles or a face shield, gloves large enough to be removed easily, and a rubber apron. For extra
protection, wear high-topped, sturdy shoes, and leave your pant legs outside the tops.
2.
Transfer the liquid slowly to prevent thermal shock to the equipment. Use containers that have satisfactory
low-temperature properties. Ensure that closed containers have vents to relieve pressure.
3.
The purity of liquid nitrogen decreases when exposed to air. If the liquid in a container has been open to the
atmosphere for a prolonged period, analyze the remaining liquid before using it for any purpose where high
oxygen content could be dangerous.
