Appendix Correction Factors For Varying Gas Mixes; Installations Where Pipe Condensation May Develop - Sage SIP Operation And Instruction Manual

66 S A G E M E T E R I N G , I N C .
Correction Factors For
Variation From Original
Digester Gas Calibration
Sage can calibrate for any Digester Gas, Bio Gas or
Landfill Gas Mix. However, it may be helpful to have
correction factors for a typical calibration, in the
event that the composition changes after delivery.
The following examples assume that the initial cali-
bration was set up for 60% CH4 and 40% CO2.
a) 65% CH4 and 35% CO2: Multiply reading by
0.982 to correct it for new composition
b) 70% CH4 and 30% CO2: Multiply reading by
0.965 to correct it for new composition
c) 55% CH4 and 45% CO2: Multiply reading by
1.0185 to correct it for new composition
For smaller changes, the corrections are linear in
between
d) Also, if 100% saturated with H2O vapor (non-
condensing), multiply readings by 1.042
e) If 50% saturated with water, multiply reading by
1.021
(Water vapor correction is linear in between)
Also, use the 45 degree mounting method in order to
avoid droplets from hitting the sensor and causing
spikes (see above right)
REV. 16-SIP/SRP
O p e r a t i o n s a n d I n s t r u c t i o n M a n u a l
Installations Where Pipe
Condensation May Develop
TILT ENCLOSURE 45º
(forward or backward)
FOR APPLICATIONS
WHERE CONDENSATION
MAY DEVELOP ON INSIDE
WALL OF PIPES