MNA0010, Revision B October 2014
33
Setting the alarm points:
After the unit has been calibrated on a known gas source, it is desirable to set the alarm points.
Scroll through the menu by pressing the “MODE” button until “ALM1” is displayed. Adjust the
up and d
own buttons accordingly. Then, press the “MODE” button again to scroll to “ALM2”.
Adjust the display as required. Press the MODE button once again and the unit will scroll to
the FAULT mode. A fault number will be displayed if one is detected. Press the mode button
again to return to normal RUN mode. A time-out is built in to the unit. After approximately 120
seconds, if no buttons are pressed, the unit will return to normal RUN mode.
Figure 30: Set Alarms Diagram
SET ALARM
MODE
Red Alarm LED Blinks.
Display indicates % oxygen.
Adjust Ramp Up/Down to
display correct oxygen value.
Press Mode button to
sequence past FAULT &
return to RUN Mode.
CAL MODE
MODE
RUN
FAULT
ALM 1
ALM 2
9.9
T
RACE
O
XYGEN
MODEL 7100 O
2
Analyzer
Mini-Zirconia
Sensor
NTRON
