Ametek 931S

Controller / User Interface | 4-43
Span-Cal
Span Concentration
The concentration of the component (%) in the calibration gas
mixture, for each sensor (entered in decimal notation). Enter ‘0’ if a
calibration gas is not used.
Span Factor
The Span (calibration) Factor for the calculated result (component
concentration), for each sensor (adjusted automatically at the
completion of a Span).
ManSpan button
Allows you to manually Span the sensor for the component being
measured. The sensor calibration is automatically adjusted based
on the average reading during the Integration Timer period after
clicking the ManSpan button.
The Span1 CAL, Span2 CAL, and Zero CAL solenoids are con-
figured (at the factory) on the Alarm Setting and Stream Switch
Parameters dialog box (under Flow Operation).
Raw Concentration
High (Sensor1 screen with Voltage Signal Type selected)
The concentration level (%) corresponding to the highest voltage
signal level from the sensor.
Low (Sensor1 screen with Voltage Signal Type selected)
The concentration level (%) corresponding to the lowest voltage
signal level from the sensor.
Factory Calibration
Pressure (Sensor1 screen with Voltage Signal Type selected)
The pressure used in factory calibration.
Correction/Linearization Coefficients (Sensor2 screen)
These factory-set parameters perform (static) corrections for Sensor 2.
Alpha is used to correct the gas concentration reading from Sensor 2
(thermal conductivity) for the effect of pressure changes.
Beta is used to correct the gas concentration reading from Sensor 2
(thermal conductivity) for cross-talk from Gas 1.
Gamma is used to correct the gas concentration reading from Sensor 2
(thermal conductivity) for cross-talk from Gas 2.
S-H2 is the linear factor used to scale the gas concentration reading
from the mV reading of the thermal conductivity sensor.
Q-H2 is a nonlinear factor used to scale the gas concentration reading
from the mV reading of the thermal conductivity sensor.