West Control Solutions MRC 9000 User Manual
Page 111
Edition 3
Rev G
Section 4
4-29
NOTES:
DP - Differential Pressure
PRES - Static Pressure - must be ABSOLUTE
TEMPF - Flow Temperature - must be degrees F
COMP - Compressibility Correction
C - Scaling Constant
This function converts TEMP from degrees F to degrees R in the equation.
7.
RELATIVE HUMIDITY
INPUT 1:
DBT
PROMPT:
DVxx DRY BULB TEMP
°
F
INPUT 2:
WBT
PROMPT:
DVxx WET BULB TEMP
°
F
INPUT 3:
BARO
PROMPT:
DVxx BARO. PRES "Hg
ACTUATOR:
n/a
RESET:
n/a
OUTPUT:
= RELATIVE HUMIDITY in PERCENT (0 to 100 typ)
If INPUT 3 is "NOT USED", then BARO=29.921
NOTES:
DBT - DRY BULB TEMPERATURE - must be in degrees F
WBT - WET BULB TEMPERATURE - must be in degrees F
BARO - ATMOSPHERIC PRESSURE - must be in "Hg (inches of Mercury)
8.
Fo VALUE - STERILIZATION CONSTANT Fo
INPUT 1:
INTEMP
PROMPT:
DVxx INPUT TEMP
INPUT 2:
STEMP
PROMPT:
DVxx STERILIZE TEMP
INPUT 3:
Z
PROMPT:
DVxx "Z" VALUE
ACTUATOR:
n/a
RESET:
YES
PROMPT:
DVxx RESET ACTUATOR
OUTPUT:
= DV + (10**A)/60
where: A=(INTEMP - STEMP) / Z
DV is the previous result
NOTES:
INTEMP - Input Temperature
STEMP - Sterilizing Temperature
Z - "Z" Value
The TEMPERATURE can be degrees F or C, but the "Z" value must take this into account.
Whenever RESET is active, DV will be set to zero.
The units of the resultant DV is MINUTES
This function is calculated once a second.
9.
ZRO2 - ZIRCONIA OXYGEN SENSOR
INPUT 1:
PP
PROMPT:
DVxx PARTIAL PRES
INPUT 2:
EMF
PROMPT:
DVxx PROBE EMF mV
INPUT 3:
TEMP
PROMPT:
DVxx PROBE TEMP
°
C
ACTUATOR:
n//a
RESET:
n/a
OUTPUT:
= PP/(10**B)
where: B=EMF/(0.0496* (TEMP+273.18))
NOTES:
PP - Partial Pressure - must be in Percent
EMF - Probe EMF - must be Millivolts
TEMP - Probe Temperature - must be degrees C
This function coverts TEMP from degrees C to degrees K in the equation