4-44 | Model 933S UV Analyzer
Correction/Linearization Coefficients (Sensor2, Sensor3 screen with Volt-
age Signal Type selected)
These factory-set parameters perform (static) corrections for Sensor 2
and Sensor3.
Alpha is used to correct the gas concentration reading from Sensor
2 and Sensor3 (thermal conductivity) for the effect of pressure
changes.
Beta is used to correct the gas concentration reading from Sensor 2
and Sensor3 (thermal conductivity) for cross-talk from Gas 1.
Gamma is used to correct the gas concentration reading from Sensor 2
and Sensor3 (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.
Signal
Type (Sensor1, Sensor2, Sensor3 screens)
Sensor 1 tab:
Select Differential if an e2v IR sensor is connected to J107 of the
Micro-Interface board, or select Voltage if a SEC IR sensor is con-
nected to J105 of the Micro-Interface board.
Sensor 2 tab:
Select Positive if an e2v TC sensor is used to produce an increasing
signal with higher concentration, or select Inverted if an e2v TC
sensor is used to produce a deceasing signal with higher concen-
tration.
Sensor 3 tab:
Select Differential if an e2v IR sensor is connected to J109 of the
Micro-Interface board.
Select Voltage if an e2v TC sensor is connected to J105 of the
Micro-Interface board.
Gain (Sensor1, Sensor3 screens with Differential Signal Type selected)
For Sensor1, connected to J107, enter the gain value corresponding
to the jumper setting of JP500 on the Micro-Interface board.
For Sensor3, enter the gain value corresponding to the jumper set-
ting of JP400 on the Micro-Interface board.
AIN Offset (duty-cyle) (Sensor1, Sensor2, Sensor3 screens)
The current duty cycle for each sensor (analog inputs) during
steady-state operation at the setpoint. The software will adjust
these values while the sensor is being zero-calibrated. These val-
ues are also displayed on the Analog Inputs dialog box (External
Sensor Input Offset). This parameter is ignored by Sensor1 with
Voltage Signal Type selected.
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