RKI Instruments GX-82A User Manual
Page 13
Model GX-82A Instruction Manual
10
Hayward, California (510) 441-5656
2. Verify Operation
To easily verify correct operation of the GX-82A, breathe out over
the diffusion grill of the instrument. The O2 reading should drop
measurably before returning to normal.
To verify detection of combustibles use a controlled source of
flammable vapor, for example, a bottle of isopropyl alcohol. The
audible alarm will sound, the %LEL will blink, and the HC will
flash on the display.
Caution
Do not use gas from a cigarette lighter to test response to
combustibles. Exposing the sensor to uncontrolled high
concentrations of gas in this manner will reduce
response and sensor life.
WARNING
I
F
THE
GX-82A
DOES
NOT
RESPOND
TO
THESE
VERIFICA-
TIONS
,
TAKE
IT
TO
A
KNOWN
“
FRESH
-
AIR
”
ENVIRON-
MENT
,
THEN
FOLLOW
THE
DEMAND
ZERO
PROCEDURE
DESCRIBED
IN
A
DJUSTMENT
AND
C
ALIBRATION
. R
EPEAT
THE
V
ERIFY
O
PERATION
PROCEDURE
BEFORE
USING
THE
GX-82A
IN
A
POTENTIALLY
HAZARDOUS
LOCATION
.
Normal Operation
The GX-82A will continuously monitor the atmosphere, and display
the LEL, O
2
, and toxic gas concentrations present. If the GX-82A is
taken into a low-light environment, the display backlight will
automatically turn on. To use with sample-drawing attachments, insert
the probe into the area to be monitored and wait a few seconds for