GX-6000 Operator’s Manual Display Mode • 48
STEL Screen
The STEL Screen displays the short term exposure limit (STEL) readings for
H
2
S, CO, and high range VOC only. The STEL reading is the average reading
over the last 15 minutes.
TWA Screen
The TWA Screen displays the time weighted average (TWA) readings for
H
2
S, CO, and high range VOC only.
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 time is assigned a 0 value for
readings. If LUNCH BREAK is set to OFF, the TWA is cleared when the
GX-6000 is turned off.
If LUNCH BREAK is set to ON, the GX-6000 will remember TWA
readings when it is turned off so it can continue them when it is turned on
again. See “Turning On the GX-6000” on page 19.
STEL
H2S CO
ppm ppm
VOC
ppm
2.0 10
10.0
TWA
H2S CO
ppm ppm
VOC
ppm
0.5 5
5.0
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