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6.7 ALARM SETPOINT MENU
The “ALARM SETPOINT” can be adjusted by the user in the ALARM
SETPOINT menu within the following ranges:
CO = 5 to 250 ppm
Cl
2
= 0.1 to 10.0 ppm
ClO
2
= 0.10 to 2.00 ppm
HCN = 0.1 to 50.0 ppm
H
2
S = 5 to 100 ppm
NH
3
= 5 to 100 ppm
NO
2
= 0.2 to 5.0 ppm
O
2
LO = 0.0 to 21.0%
O
2
HI = 21.0 to 25.0%
PH
3
= 0.10 to 5.00 ppm
SO
2
= 0.5 to 20.0 ppm
Very low oxygen alarm settings are useful when the instrument is used to
verify nitrogen purging. On leaving the setpoint function or on subsequent
power on, the user will be prompted to verify the safety of abnormally low
settings
To enter the ALARM SETPOINT menu, depress the “SELECT” pushbutton in
the menu selection screen as described in Section 6.2 above. One of the
following ALARM SETPOINT menu screens will appear:
<gas> ALARM SETPOINT
For Toxic Gases HI ALARM = <_> ppm
CHANGE OK
ALARM SETPOINT
For O
2
HI ALARM = 23.5%
LO ALARM = 19.5%
CHANGE OK
The setpoint shown is the factory default setting. If acceptable, depress