RKI Instruments Gas Tracer - Manual (Page 56)

48 • Display Mode Gas Tracer Operator’s Manual
TWA Screen
The TWA Screen displays the time-weighted average (TWA) readings
for CO only.
The TWA reading is the average reading during 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 time
is assigned a 0 value for readings.
Alarm Points Screen
The Alarm Points Screen allows you to view each channel’s alarm
settings for full scale, warning, alarm, STEL (for CO only), and TWA
(for CO only). The bottom line of the screen will alternate between
ALARM--P, NO /DISP, and YES/ENT.
Press the POWER ENTER button to proceed to view the full scale
settings. Use the AIR▲ or (SHIFT)▼ buttons to scroll through screens
showing the different settings.
0
ppm
TWA
CO
dISP
ALARM--P
100
40.0
500
vol%
%LEL
%
ppm
CH
4
O
2
F. S.
CO