T
HERMO
F
ISHER
S
CIENTIFIC
S
S
S
S
S
ECTION
ECTION
ECTION
ECTION
ECTION
4
4
4
4
4
S
CREENS
AND
S
ETTINGS
O
PERATING
G
UIDE
, TEOM 1405
4-3
The TEOM Data screen contains the following information:
•
MC (µg/m
3
):
This field contains the mass concentration value. This is a one-
hour average updated every 6 minutes. This value cannot be changed by
the user.
•
01-Hr MC (µg/m
3
):
This field contains the 1-hour mass concentration
average. This is a sliding average that is updated every 60 minutes on the
hour. This value cannot be changed by the user.
•
08-Hr MC (µg/m
3
):
This field contains the XX-hour mass concentration
average. The user may set value to any whole number greater than 1. This
is a sliding average that is updated every 60 minutes on the hour. This value
cannot be changed by the user.
Note
Note
Note
Note
Note. Mass concentration averages of less than 24 hours can be
averaged using data logging equipment to compute sliding 24-
hour averages and 24-hour averages that do not necessarily start
and end at midnight, as well as averages on other user-defined
time scales.
▲
•
12-Hr MC (µg/m
3
):
This field contains the 12-hour mass concentration
average. This is a sliding average that is updated every 60 minutes on the
hour. This value cannot be changed by the user.
•
24-Hr MC (µg/m
3
):
This field contains the 24-hour mass concentration
average. This is a sliding average that is updated every 60 minutes on the
hour. This value cannot be changed by the user.
•
T
otal Mass (µg/m
3
):
This field contains the total mass that has accumulated
on the TEOM filter since the last filter change or reset.
•
Frequency:
This field contains the oscillating frequency of the tapered
element (TE) in the mass transducer. This value varies from one TEOM
1405 unit to another, but generally ranges between 150 and 400 Hz. This
value cannot be changed by the user.
•
Noise:
This field contains the mass transducer’s performance. This value
should be less than “0.10” after the system has been in Operating Mode
4 for at least 30 minutes. This value cannot be changed by the user.
Содержание TEOM 1405
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