J.P. Instruments EDM 740 Pilots Guide - Manual (Page 10)

Page 10 Engine Data Management
2
Temperature Units (°F or °C)
The EDM series engine temps can be set for either degrees Fahrenheit
°F or degrees Celsius °C. Note: OAT units can be set independently of
the engine temps. To change the display of engine temperatures see
“Changing the Alarm Limits” on page 52.
3
Cylinder Numbers and the Cylinder I.D. box
The row of numbers 1 through 6 (cylinder I.D numbers) and the letter
‘T’ (optional turbine inlet temp) are the column labels for the analog
display bargraphs. A square box (cylinder I.D. box), surrounding one or
more of the labels, specifies that those particular cylinders relate to the
values currently shown in the Scanner® information area.
4
CHT absolute scale
The ‘CHT absolute scale’ allows you to quickly determine the absolute
temperature of any CHT by comparing the bargraph height to the scale.
This is a quick and useful way to visually determine your CHT
temperatures relative to redline.
5
Bar Graph EGT and CHT
A cylinder ‘bargraph set’ is composed of a dotted line leading from the
cylinder I.D. number vertically to its EGT/CHT digital values. The EGT
column is located to the left of the line and the CHT column to the right.
Columns are composed of a stack of segments. The maximum height for
a column is the top of the dotted line. The CHT redline value is depicted
by a horizontal red line approximately half way up and to the right of the
dotted line. When any CHT column reaches redline, its column will turn
red and an alarm message will commence. The CHT display is not
affected by mode or view. The EGT column has three different viewing
modes: Percent View, Normalize View and Lean Find.
6
Percent HP (EDM-830 only)
Displays %HP (if FF, RPM, OAT, MAP functional).
7
Scanner® Information Area
The Scanner® Information Area provides expanded information for the
various monitored parameters. The Scanner® operates automatically or
manually.