KMPS-1-64 Manual
12/18
KM 8000 Rev. A
Page 9 of 40
Copyright © 2018 Kulite Semiconductor Products, Inc.
All Rights Reserved.
Figure 3: Schematic Diagram of internal Piping of KMPS-1
2.2
Temperature Compensation
Both the pressure and temperature output is compensated inside the microprocessor using
coefficients programmed at the factory. All coefficients for these calculations are stored on
an EEPROM in each of the four modules. In this way a module can be replaced without any
programming. The user has access to the user gain (G
u
) and offset (O
u
) for each unit to allow
for adjustment but does not have access to temperature correction coefficients which are
programmed at the factory. The offset and gain can be changed using the SLope and OFfset
command. The UNits command automatically adjusts the full scale value to reflect the
difference between PSI and Bar.
2.3
Pressure Output
The pressure sensors are compensated using a fourth order compensation in temperature
and a third order compensation in pressure according to the formulae:
Offset = O = O
0
*T
4
+ O
1
*T
3
+ O
2
*T
2
+ O
3
*T+ O
4
Gain = G = G
0
*T
4
+ G
1
*T
3
+ G
2
*T
2
+ G
3
*T+ G
4
Linearity = L = L
0
*T
4
+ L
1
*T
3
+ L
2
*T
2
+ L
3
*T+ L
4
Third Order = C = C
0
*T
4
+ C
1
*T
3
+ C
2
*T
2
+ C
3
*T+ C
4
Pressure Out(% of Range) = G
u
* (C*P
3
+ L*P
2
+ G*P) + O + O
u
Pressure Out (Engineering Units) = Pressure Out * Full Scale Reading
Pressure Inputs
Reference Manifold
Pressure
Sensors
Purge Input
(PURGE)
Cal Input
(CALA & B)
Reference
Input (REFA & B)
Ref
Input (REFA
& B)
Summary of Contents for KMPS-1-64 Series
Page 1: ......
