AEM 30-3020M Water Methanol Failsafe Device - Manual (Page 10)

Page 10
4. Review and adjust the high and low flow limit lines as needed to contour the lines around the baseline flow curve by
clicking and dragging on a break point. Once a break point is selected you can also move left and right using the
arrow keys and then move the break point up or down. Pressing the Tab key will toggle back and forth between the
high and low limit lines.
5. Test the configuration using your anticipated normal operating conditions with varying injection progression rates to
account for starting, stopping, accelerating, high boost, low boost, tip in, fast shifts, slow shifts, etc. If false triggers
occur either adjust the high or low flow curve up or down at the injection percentage where the alarm occurred or
adjust the Alarm Delay setting.
There are two general configuration strategies to follow when using the Water/Methanol Failsafe. The high and low flow
limit lines can be set very tightly to the baseline flow curve and a longer Alarm Delay can be used. Conversely, the high
and low flow limit lines can be set further way from the baseline flow curve and a shorter Alarm Delay can be used. All
injection systems are different and only thorough configuration testing will reveal which strategy is best for your
application.
Contouring the high and low flow limit lines to
better fit the baseline flow curve