Programming the 34 limits, Programming the high and low egt and cht limits – Electronics International UBG-16 User Manual

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5. Canceling all Active Alarms for 10 Minutes:

To cancel all active alarms for 10 minutes, push and hold the Step
Switch to the left until the word “CANCEL” appears in the digital
display. Any new alarm (i.e., an alarm set after this step is performed)
will be displayed and will not be affected by the 10-minute cancellation
of alarms.

6. Activating all Canceled Alarms:

To activate all canceled alarms, push and hold the Step Switch to
the right until the word “SCAN” appears in the digital display.

Programming the 34 Limits:

The 34 pilot-programmable limits allow you to customize the UBG to your engine. Trend analysis and problem
detection is done automatically every one-half second. You are alerted as soon as a limit is violated.

While programming limits, keep in mind that setting limits just outside normal operating ranges allows potential
problems to be detected early, without causing a false warning. Not only are false warnings annoying, but they
can desensitize you to warnings in general. This in itself could cause a problem.

The “Work Sheet for Setting High and Low Limits” located at the back of this manual may be helpful in setting
proper limits.

Programming the High and Low EGT and CHT Limits:

It is recommended that EGT and CHT limits be set just outside each cylinder’s normal operating range so prob-
lems can be detected without causing a false warning.

Exhaust gas temperatures are directly related to your engine’s ability to produce power. If any cylinder has a
problem producing power (fouled plug, burned or stuck valve, broken ring, intake leak, plugged injector, timing
problem, bad mag, etc.) the exhaust gas temperature for that cylinder will be abnormally high or low, depending
on the problem. Each of your engine’s cylinders operates differently and has a “normal” operating temperature of
its own. The UBG is capable of being programmed to take into account each cylinder’s individual operating
temperature. When selecting and programming the EGT limits on the UBG, it is assumed your engine does not
have a current problem and it is operating properly.

1. Selecting the High EGT Limits:

At 75% power, lean your engine to peak EGT. Record the EGT readings for each cylinder. Program the
High Limit for each cylinder 40’F above the recorded readings for that cylinder. This is only a