Sage SIP - Appendix Correction Factors for Varying Gas Mixes; Installations Where Pipe Condensation May Develop

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S A G E M E T E R I N G , I N C .

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

REV. 16-SIP/SRP

TILT ENCLOSURE 45º

(forward or backward)

FOR APPLICATIONS

WHERE CONDENSATION

MAY DEVELOP ON INSIDE

WALL OF PIPES

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)

Installations Where Pipe

Condensation May Develop