Electronics International US-8A - Manual (Page 8)

tions and time to find the hottest cylinder. This can be a real asset in leaning or locating a possible problem.
When used for EGT leaning, it should be noted that the leanest cylinder is not always the hottest; but it is the
cylinder you want to start your leaning process on. Precision leaning will then be done to 1'F and the Leanest
Cylinder will be verified. Leaning will be covered later in this manual.
A) Manual Mode - To find the hottest analyzer cylinder in the Manual Mode, press the “Peak” button. The
Ultimate Analyzer will automatically switch to Channel One and start a fast scan (one second per channel).
It will only scan through the analyzer channels and jump to the hottest channel when done.
B) Scan Mode - You may also use the Peak Locate feature in the Scan Mode. The Ultimate Analyzer will
operate the same as in the Manual Mode. After it has found the hottest analyzer channel it will continue
scanning at the programmed scan rate.
4. Hottest Cylinder Indicator:
In the Scan Mode only, the Ultimate Analyzer will light a bar high in the left hand corner of the display any
time it is displaying the hottest analyzer cylinder. This feature allows you to determine if the leanest cylinder
has changed. If this happens, you may need to readjust your mixture.
5. “Temp Prob” Warning Lights (Automatic Engine Analysis):
A) High-Temp Problem (Scan and Manual Modes) - If the temperature being displayed exceeds the
programmed limit, the “Temp Prob” warning light over the appropriate display will come on. Also, there
will be a bar high in the left hand corner of the display. If you are in the scan mode, the scan will stop on the
problem channel.
B) Low-Temp Problem (Scan Mode only) - If the temperature being displayed is less than the programmed
Low Limit, the “Temp Prob” warning light over the appropriate display will come on. Also, there will be a
bar low in the left hand corner of the display and the scan will stop on the problem channel.
C) Differential Temp Problem (Scan Mode only) - Any time the temperature difference between the
hottest and coldest channel exceeds the programmed differential limit the “Temp Prob” warning light over
the appropriate display will come on. Also, the high and low bar in the left hand corner of the display will
alternately blink and the Ultimate Analyzer will stop on the coldest cylinder. In this case, the problem may
be the coldest cylinder or it may be the hottest cylinder. By comparing temperatures with adjacent cylinders
the problem cylinder will become apparent. To quickly find the hottest cylinder, press the “PK” button on
the front panel.
D) Shock-Cooling Temp Problem (Manual Mode only) - Any time you are on a channel on which the High
Limit has been programmed between 300’F and 600’F (this indicates a CHT channel) and the temperature
being monitored is between 300’F and 600’F (this is the critical range of cylinder head temperatures) and the
temperature is decreasing faster than the programmed limit, the appropriate “Temp Prob” warning light will
blink.
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Features Operating Information