Agilent Technologies 4500 Series Operation Manual page 23

Figure 5. Applying a sample to the bottom window on the TumblIR
In the case of a volatile sample, such as with fuels analysis, larger
amounts of sample can be applied without concern of leakage or
damage to the instrument, however, using the smallest amount of
sample possible will ease in the cleaning process.
Although it is safe to run a variety of lubrication samples, including
aqueous solutions or even thick pastes such as grease, the TumblIR is
not to be used with any solid samples, such as hard graphite
lubricant. Use of the TumblIR with solid samples will damage the
ZnSe windows.
The sample mounting window and accessory window are made from ZnSe. ZnSe
CAUTION
can be damaged by samples with a pH below 4 and above 9. Only measure
samples with a pH between 5 and 9.
ZnSe windows can be easily scratched by hard or abrasive samples. Avoid use of
CAUTION
samples that may scratch the surface of the windows.
Do not open your system and attempt to clean interior surfaces. Opening your
CAUTION
system will void the warranty.
Agilent 4500 Series FTIR Operation Manual
Analyzing Samples
23