Brooks Instrument QMBM - Manual (Page 41)

Section 4 Maintenance
4-1
Installation and Operation Manual
X-CM-QmB-eng
Part Number: 541B029AAG
June, 2011
QmB Series IP40, IP66, IP66XP
4-1 General
There are no routine maintenance procedures required to keep the
Quantim device in good operating condition. It is however, very important
to keep the fluid entering the Quantim clean, and as a result periodic
replacement of the inlet guard filter is recommended at a frequency
determined by the cleanliness of the fluid. At a minimum this guard filter
should be replaced on an annual basis.