Engine Instruments - Honeywell SPZ-8000 Maintenance Manual

2. E. (1)
Engine Instruments - General
The configuration of the GIV system includes two DA-884 Data
Acquisition Units (DAU) which receive signals from the engine
sensors for display on the engine and CAS (paragraph 2.F.) displays.
DAU 1 is tied to the left engine sensors and DAU 2 is tied to the
right engine sensors. Additionally, each DAU has two channels (A
and B) that are completely independent from one another. Each
channel within a particular DAU is performing the same computations
on the same engine parameters. The pilot has the ability to display
data from one channel at a time from each DAU. The selection
between the two channels is accomplished through the display
controller (Figure 223). This is the crew's means of reversion in
the event that the displayed DAU channel fails.
The primary engine instruments reside on the left two thirds of the
engine display format. This area is divided into five rows of
engine gauges as follows:
. Engine Pressure Ratio (EPR)
Turbine Gas Temperature (TGT)
. Low Pressure Tach (LP)
. High Pressure Tach (HP)
Fuel Flow (FF)
Each engine gauge is a 225-degree arc with moving pointer and fixed
current value window located above the pointer rotation point. Each
engine gauge type is labeled in white between the left and right
gauges as shown in Figure 223.
The secondary engine parameters are displayed digitally in the
remaining one-third of the display format. The parameters which
comprise the secondary engine parameter display are:
Oil Pressure
Oil Temperature
Engine Vibration Monitor (EVM) - LP
Engine Vibration Monitor (EVM) - HP
Combined Hydraulic Pressure
Flight Hydraulic Pressure
Utility Hydraulic Pressure
Auxiliary Hydraulic Pressure
Engine Fuel Temperature
Fuel Quantity
22-14-00
Page 262
Aug 15/91
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