AMI Analyzer Manual
Installation Procedure
13
any of the buttons, or don’t press the UP or DOWN buttons for three seconds, the unit
will cycle back into normal operation and store the new value.
Output Ranges
The output range is the range to which the 4-20mA analog output signal and the alarm
settings correspond.
Output ranges 0-10ppm, 0-50ppm, 0-100ppm, 0-500ppm, 0-1000ppm, 0-5000ppm,
0-1%, 0-5%, 0-25%.
View Output Range
Press the OUTPUT RANGE button on the front panel for a second, and let go. The display
will show the full scale value of the output range for about three seconds, and then
change back to the oxygen reading.
Change Output Range
Press the OUTPUT RANGE button for a second and let go. While the output range value
is displayed (you have approximately three seconds), press the UP or DOWN arrow
buttons to change it. The output range will change to whatever you want. Simply leave
it or select another function and the range will be stored and the system updated. You
will note that if this results in an alarm change, the alarms will change as soon as the
unit starts showing the reading again. If the output range does not change, the security
level must be set to full or span only security. In this case change the security level with
the laptop and the AMI User Interface program.
Alarm Set Points
The alarm set points can be viewed and changed from the front panel.
View Alarm Set Points
Press either of the ALARM SET POINT buttons and let go. The alarm set point will be
displayed for about 3 seconds, and the then the display will revert to the oxygen reading.
The set point shown relates to the current output range. If you change the output range,
the alarm set point will change to a new value which is the same percentage of the new
output range. For example, if the output range is 100ppm, you can set an alarm set
point to be half way up, i.e. 50ppm of oxygen. If you then change the output range to
500ppm, the alarm set point will remain half way up the new range, and be displayed as
250ppm.
Change Alarm Set Points
Press one or the other ALARM SET POINT button for a second, and let go. While the
alarm set point is showing, press either the UP or DOWN arrow button and hold it until
the value is what you want. The numbers will scroll slowly at first and then speed up: if
you press the other button, or release and re-press the one you are using, the number
will start going slowly again.
