Electronics International US-8A - Manual (Page 13)

1-6
Operating Information
10
1-6
Blinking Digit
4-cylinder engine would be programmed for “1-4”). This would set up the first six channels to be analyzed
against the Differential Limit and these channels are the only ones looked at when the Peak Button is pressed.
Channels 7 and 8 may be used for any other temperature measurement without interfering with the Differen-
tial or Peak Locate features.
To program the Analyzer Channels use the Step position on the Mode Selector Switch to advance the count.
The Peak Buttons may be used to select the left or right digit. To leave the programming mode, press both
Peak Buttons at the same time.
Selecting the Proper Limits
Your objective is to set the limits on the Ultimate Analyzer just outside the normal operating temperatures for
each measured parameter. The 36 programmable limits allow you to personalize the Ultimate Analyzer to your
engine. That means trend analysis and problem detection is done automatically every 16 seconds and you are
alerted as soon as a problem starts to occur (i.e., if an engine temperature starts to drift high or low from its
normal operating temperature range it will be detected by a High, Low or Differential limit).
The golden rule for setting the limits on the Ultimate Analyzer is “No Red Light During Take-Off, Climb or
Cruise.” Some General Limits that provide a good starting point for most aircraft are given below:
EGT High Limits ------ -------- 1550’F
EGT Lower Limits ------------ 1100’F
TIT High Limit ----------------- 1650’F
TIT Lower Limit --------------- 1100’F
CHT High Limits -------------- 430’F
CHT Lower Limits ------------ 150’F
Oil High Limit ----------------- 220’F
Oil Lower Limit ---------------- 50’F
OAT High and Low Limit --- 000 (Limits disabled)
Carb Temp High Limit -------- 150’F
Carb Temp Lower Limit ------ 37’F
Selecting the Proper Limits