Fluke RUSKA 7350, User Manual

Page: 19 / 78

Theory of Operation
Electronics Section
2
2-3
Table 2-1. Conversion Factors
Symbol Description Conversion Factor
inHg inches of mercury (0 °C) = kPa x 0.2952998
inHg inches of mercury (60 °C) = kPa x 0.296134
kPa kiloPascals = kPa x 1.0
bar bars = kPa x 0.01
psi pounds per inch
2
= kPa x 0.1450377
cmH
2
O centimeters of water (4 °C) = kPa x 10.19744
inH
2
O inches of water (4 °C) = kPa x 4.014742
inH
2
O inches of water (20 °C) = kPa x 4.021898
inH
2
O inches of water (25 °C) = kPa x 4.024108
kg/cm
2
kilograms per cm
2
= kPa x 0.0101972
mmHg millimeters of mercury (0 °C) = kPa x 7.500605
cmHg centimeters of mercury (0 °C) = kPa x 0.7500605
knots airspeed knots per NASA TN D-822
km/hr kilometers per hour = knots x 1.852
feet feet of altitude per MIL-STD-859A
meters meters of altitude per MIL-STD-859A
user1 user defined = kPa x User defined
user2 user defined = kPa x User defined
Pa user defined (Pascals) = kPa x 1000.0
%FS user defined (percent of full scale)
IEEE-488 Interface
The RUSKA 7350’s IEEE-488 (GPIB) Interface Card, which plugs directly into the
Back Plane Board, provides the RUSKA 7350 with an IEEE-488 Interface. This interface
allows the user to automate the measurement and control processes.
Front Panel
The Microprocessor Board interprets all input from the Front Panel. The Front Panel
contains the active matrix TFT color display, rotary knob and rubberized keys used to
operate the RUSKA 7350.
Motor Controller
This motor controller controls the speed of the motor driving the pump in the pneumatic
section of the 7350. The motor controller receives its analog signal (+/-10VDC) from the
76XX Interface Board and in turn runs the motor at variable speed. The controller can be
configured with jumpers for either 115 VAC or 230 VAC power supply.