Air Equivalency Calibration - Magnetrol Thermatel TA2 Installation And Operating Manual

2.5.18 Air Equivalency Calibration

The Air Equivalency calibrations permits the use of an air calibration and then, using the MAGNETROL
historic data base, relate the flow of air to the flow of gas. The equations use a polynomial curve fit.
A fault will occur if the curve fit becomes non-monotonic (signal decreases with increasing flow) which can
occur if operating outside the data range. Consult MAGNETROL regarding proper sizing with
Air Equivalency calibrations. The user may contact MAGNETROL to obtain air equivalency factors
for various gases. These values should only be used when the TA2 was calibrated on air. If the calibration
data in the Calibration Table is for a different gas, the results are invalid.
Configuration Parameter
Enable/Disable
Ag - Eg
Air Equivalency
to select
40
Explanation
Enables or Disables the Air Equivalency calculations
Factors in a Polynomial equation in the form of A + Bv + Cv
where v is the mass velocity. Contact MAGNETROL for factors
UP
DN
Air Equiv Mode
ENT
DEL [selection]
UP
DN
Gas Coeff Ag
DEL
[entered value]
UP
DN
Gas Coeff Bg
DEL
[entered value]
UP
DN
Gas Coeff Cg
DEL
[entered value]
UP
DN
Gas Coeff Dg
DEL
[entered value]
UP
DN
Gas Coeff Eg
DEL
[entered value]
UP
DN
Previous Menu
DEL
to select
UP
DN
Air Equivalency menu exists for both Gas A and Gas B
ENT Disabled
DEL
Enabled
ENT
decimal entry
DEL
ENT
decimal entry
DEL
ENT
decimal entry
DEL
ENT
decimal entry
DEL
ENT
decimal entry
DEL
TA2 User Interface
Factory Configuration Menu
Air Equivalency
54-631 THERMATEL Model TA2 Transmitter
2 + Dv 3 + Ev 4