Vaisala GMP231 - Manual (Page 72)

User's Guide _______________________________________________________________________
70 ___________________________________________________________________ M211501EN-C
CHAPTER 6
MAINTENANCE
This chapter provides information that is needed in the basic maintenance
of the GMP231.
Cleaning
When correctly installed, the GMP231 is minimally exposed to
contaminants in the chamber. There is little reason to perform cleaning
other than normal chamber sterilization, and changing the filter and/or
silicone plug if they appear contaminated. See the following sections for
instructions:
- Changing the Filter on page 71.
- Changing the Silicone Plug on page 72.
The CARBOCAP
®
sensor of the GMP231 is well protected by the PTFE
filter, and it can tolerate some dirt on the optics as the measurement is
compensated for the reduction of signal.
CAUTION When changing the filter, you can use clean instrument air to gently blow
any loose dirt and filter material away from the sensor. Do not attempt to
clean the optical surfaces of the sensor in any other manner.
Chemical Tolerance
GMP231 tolerates the following sterilization chemicals:
- DMSO
- IPA (70% Isopropyl Alcohol, 30% water)
- H
2
O
2
(2000 ppm), non-condensing
- Ethanol
- Acetic acid
CAUTION The electronics housing of the GMP231 is not sealed, so do not expose it
to these chemicals. If necessary, you can clean the housing by wiping
with a moist cloth.