Thermo GasTech CO-95, Руководство оператора

Страница: 19 / 45

Start Up & Operation
71-0011 — REV E 3-3
INSTRUMENT OPERATION
In normal operation, your instrument monitors the environment
and displays the current gas concentration. The instrument
displays alarms to indicate gas concentrations outside preset
limits. Low and dead battery as well as weak and failed sensor
conditions are also indicated.
NOTE
Momentary small negative gas readings are not abnormal with
the HS-95 and the CO-95. The instrument automatically corrects
itself.
Alarm Indications
When a gas concentration reaches the alarm setpoint, the alarm is
indicated by the buzzer pulsing, the red alarm light flashing, and
the gas reading blinking, all in unison. For the HS-95 and the
CO-95, the gas alarm is a pulsing audible tone with a blinking
reading for the low level alarm, and a steady audible tone with
pulsing display for the high level alarm. For the OX-95, you can
tell whether the alarm is a high or low alarm by the gas reading.
A high O
2
alarm shows a reading above the high setpoint, and is
signified by a pulsing audible tone. A low O
2
alarm shows a
reading below the low setpoint, and is signified by a steady
audible tone.
NOTE
Preset alarm setpoints conform to current OSHA standards, but
can be adjusted. See Chapter 4 for alarm adjust procedures.