04 Series for CO(-H2)
Chapter 4: Display Mode • 29
TWA Screen (TWA)
The TWA Screen displays the time weighted average (TWA) reading.
The TWA reading is the average reading
over the last 8 hours
. If 8 hours have not elapsed
since the last time the TWA reading was cleared, the average is still calculated over 8 hours.
The missing readings are assigned a value of 0. If
LUNCH
is set to
OFF
(factory setting), the
TWA is cleared when the CO-04C is turned off.
If
LUNCH
is set to
ON
, the CO-04C remembers the TWA reading when it is turned off and
can continue accumulation when it is turned on again (see pg.14).
Changing the User ID (USER ID)
This screen only appears if
DISP.SET
in User Mode is set to
ON
(factory setting) and if
ID
DISP
in Maintenance Mode is set to
ON
(factory setting is
OFF
).
Use this screen to select a user ID from the 128 user IDs that are stored in the CO-04C’s
memory. Before a user ID is selected on a brand new instrument, the user ID is “----------”.
The factory-installed user IDs have a “U_ID_XXX” format.
The user ID provides a way to identify the CO-04C user during a data logging session.
User IDs can only be selected in this menu item. In order to edit the 128 user IDs, you must
use the 04 Series Datalogging Program or 04 Series Setup Program.
1. After entering Display Mode, press and release POWER MODE until the
USER ID
screen sequence appears.
2. To change the User ID, press and release AIR. The current User ID flashes.
3. Use AIR to scroll to the desired User ID.
4. Press and release POWER MODE to save the User ID and return to the
USER ID
screen
in Display Mode.
CO
5
TWA
ppm
USER
ID
U_ID_001
USER
ID
CHG / AIR
USER
ID
NO /MODE
USER
ID
U_ID_001
