Energizer PORTABLE GAS DETECTION INSTRUMENT User Manual
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The STEL (Short Term Exposure Level) function measures the level of toxic
gas during a fifteen (15) minute interval and alarms when the preset STEL
value in parts per million is exceeded. The alarm levels are as follows:
STEL
TWA
Ammonia
35 ppm
25 ppm
Carbon monoxide
100 ppm
25 ppm
Chlorine
1 ppm
0.5 ppm
Chlorine Dioxide
0.3 ppm
0.1 ppm
Hydrogen Cyanide
4.0 ppm
2.0 ppm
Hydrogen sulfide
15 ppm
10 ppm
Nitrogen Dioxide
5.0 ppm
3.0 ppm
Phosphine
1 ppm
0.3 ppm
Suphur Dioxide
5 ppm
2 ppm
To enter the TWA/STEL Menu, depress the “SELECT” pushbutton as de-
scribed in Section 6.2 when the TWA/STEL Menu screen is displayed. The
instrument will display one of the following screens:
For Toxic Gases
STEL = 0 ppm
TWA = 0 ppm @ 0:05
RESET SHOW
DISABLE TWA/STEL
STEL and TWA values are calculated. STEL averages exposure for the
latest fifteen (15) minutes. TWA shows the eight-hour average exposure.
Both measures start from zero when the instrument is turned on. The TWA
reading accumulates total exposure since turn-on or “RESET” and is calcu-
lated as if the total exposure occurred in a standard eight-hour shift.
The “RESET/DISABLE” pushbuttons allows the user to reset the values and
time on the display to “0”. One of following screens will be displayed when
the “RESET/DISABLE” pushbuttons are depressed:
TIME AVERAGE VALUES
For Toxic Gases
RESET DISABLE