St 32 – Sandia Aerospace ST 32 User Manual
Page 4
ST 32
Aircraft Signal Conditioner
SECTION 1
GENERAL DESCRIPTION
SANDIA aerospace
Albuquerque, New Mexico
www.sandia.aero
1.1
I
NTRODUCTION
This sheet describes the installation of the ST 32 Aircraft Signal Conditioner. It is intended for use by FAA
certified repair stations and original equipment manufacturers (OEM’s) to install the ST 32 and includes both
mechanical and electrical installation information. The installer should insure that the ST 32 is operating accord-
ing to its intended function.
1.2
P
RODUCT
D
ESCRIPTION
The ST 32 is dual function signal conditioner. It converts four channels of the sinusoidal output of Tach Genera-
tors and one channel of analog strain gauge pressure to a digital signal that can be used by aircraft display and/or
control systems.
1.2.1
P
RODUCT
V
ARIATIONS
The -00 is original Variation
The -01 in a minor change to the input Power Pins. Both Oinbs 1 and 20 have sseperate
revese portection diodes to allow the ST 32 to be powered form independent power
buses.
1.3
T
ECHNICAL
C
HARACTERISTICS
1.3.1
P
HYSICAL
C
HARACTERISTICS
Width 4.80”
Height
1.00”
Depth 4.80”
Weight
0.62 lb
1.3.2
O
PERATIONAL
C
HARACTERISTICS
Operating Voltage
18-32.2Vdc
Current
Less Than 1A (Heater On)
Less Than 100mA (Heater Off)
Operating Temp
-55
o
C to +70
o
C
Max Operating Altitude
55,000 Feet
1.3.3
Approved Equipment
1.3.3.1 Tach Input Requirements
The ST 32 requires the following input from the on-board Tach Generator.
Signal: Sinusoidal 3 Phase or Monopole
Signal Frequency Range, Sinusoidal 3 Phase:
1-30,000Hz
Signal Frequency Range Monopole: 50-30,000Hz
Signal Amplitude Range: 0.4Vpp-150Vpp
1.3.3.2 Approved Tachometers include:
Globe 22A703
AAE 32005-007
Electro-Mech EM-8001
MS28054-1 Two Pole, Three Phase Tach Generators
MIL-G-26611 Two Pole, Three Phase Tach Generators
1