T
HERMO
F
ISHER
S
CIENTIFIC
S
S
S
S
S
ECTION
ECTION
ECTION
ECTION
ECTION
5
5
5
5
5
M
AINTENANCE
AND
C
ALIBRATION
P
ROCEDURES
O
PERATING
G
UIDE
, TEOM 1405
5-5
Filters should be stored inside the unit for easy access and to keep them
dry and warm.
TEOM filter life depends upon the nature and concentration of the
particulate matter sampled, as well as the flow rate settings. TEOM filters
must be replaced when the filter loading value approaches 100%. This
generally corresponds to a total mass accumulation on the filter of
approximately 3-5 mg. TEOM filter life at a main flow rate of 3 l/min is
generally 21 days at an average PM-10 concentration of 50 µg/m
3
. TEOM
filter life is longer at lower flow rates because the particulate matter
accumulation on the TEOM filter is slower.
TEOM filters must be replaced before the filter loading percentage on the
status line of the Main screen reaches 100%. When the filter loading
percentage is greater than 90%, the unit will trigger a status condition. You
must replace the 47 mm filter every time that you replace a TEOM filter.
Note.
Note.
Note.
Note.
Note. Do not handle new TEOM filters with your fingers. Use the filter
exchange tool provided with the instrument to replace filters.
▲
Содержание TEOM 1405
Страница 2: ......