RKI Instruments GX-82 - Manual (Page 9)

Model GX-82 Instruction Manual Operation • 5
Operation
Start-up
1. Press the POWER button. The buzzer sounds a single tone, and the GX-82 displays
the following:
BATT. CK (MIN 2.3V)
This message displays while the GX-82 is measuring the battery voltage. If the voltage
is below the 2.3 volt minimum, the GX-82 cannot operate.
BATT. (X.XV)
This message displays the actual battery voltage; for example, (2.9V).
SELF DIAGNOSIS
This message displays while the GX-82 checks itself for proper operation.
STAND BY
This message displays while the GX-82 completes the self-checks and prepares for
normal operation.
00 21.0 00.0
The normal operating display, showing fresh-air concentrations of all gases. The
GX-82 sounds a double tone to indicate it is in normal operation.
2. Verify that the GX-82 is operating correctly.
To easily verify correct operation of the GX-82, exhale over the diffusion grill. When
the oxygen reading drops below the decreasing oxygen alarm level, the audible alarm
for oxygen deficiency should sound, and the OXY LED should flash.
To verify detection of combustibles, use a controlled source of flammable vapor, for
example a bottle of isopropyl alcohol. The %LEL reading should rise, the audible
alarm should sound, and the COMB LED should flash.
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: If the GX-82 does not respond to these verifications, take it to a known
“fresh-air” environment, then follow the AUTO ZERO procedure in
Normal Operation. Repeat step 2 above before using the GX-82 in a
potentially hazardous location.