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Diagram 5a, Diagram 5b, Non-linearity – Setra System Model 869 User Manual

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5.3 USER INTERFACE PANEL

The user interface panel includes the pressure and electrical connections
to the unit under test. (See Diagrams 5A & 5B.)

Diagram 5A

Power Switch

Pocket PC

Power Switch

Low Pressure Port

High Pressure Port

Optional UUT Mounting

8-32 UNF Threaded Inserts (2)

Electrical Connections

for Unit Under Test

Expert-Equipped 869

Standard 869

EPIC Connection Point

Power Switch

Pocket PC

Power Switch

Low Pressure Port

High Pressure Port

Optional UUT Mounting

8-32 UNF Threaded Inserts (2)

Electrical Connections

for Unit Under Test

Diagram 5B

47

Non-Linearity

Relationship of a calibration curve to a specified
straight line.

Best Fit
Straight Line
(BFSL)
Method

Example: ±0.1% FS

Relationship of a calibration curve to a specified
straight line with end points at zero and full scale.

Terminal
Method

Example: ±0.12%
FS

5.1 VDC

0.1 VDC

0 PSI

100 PSI

+0.

1%

FS

-0.1

%FS

R

S

232 OU

TP

U

T

0 PSI

100 PSI

+0.

012

%F

-0.0

12%