RKI Instruments GX-2012 Manual - Manual (Page 53)

GX-2012 Operator’s Manual Display Mode • 45
The lunch break feature enables the GX-2012 to remember peak readings
when it is turned off so it can continue them when it is turned on again. See
“Turning On the GX-2012, Normal Mode Only” on page 19. To reset the
peak readings during operation, press and hold the RESET SILENCE button
for a few seconds while in the peak screen.
STEL Screen
The STEL Screen displays the short-term exposure limit (STEL) readings for
CO and H
2
S only. The STEL reading is the average reading during the last 15
minutes.
TWA Screen
The TWA Screen displays the time-weighted average (TWA) readings for CO
and H
2
S 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.
0
20.9
0
0.0
%LEL
%
ppm
ppm
CH
4
O
2
PEAK
CO
H
2
S
PEAK
0
0.0
ppm
ppm
STEL
CO
H
2
S
0
0.0
ppm
ppm
TWA
CO
H
2
S