Teledyne 2000XTC - Thermal conductivity analyzer - Manual (Page 29)

Thermal Conductivity Transmitter Installation
stabilization of the heater before continuing with the
calibration.
3. If the output is still fluctuating after 15 minutes, continue
making small adjustments to the temperature until the output
signal stabilizes.
Table 3-1: Concentration from Output Current
Heater
Temperature
(°C)
Voltage at U1
pin 12 (V)
2.04 V 20°
2.25 V 25°
2.45 V 30°
2.62 V 35°
2.78 V 40°
2.92 V 45°
3.04 V 50°
3.15 V 55°
3.24 V 60°
3.32 V 65°
3.6.2 Zero Calibration
Zero calibration requires the use of a prepared gas known to be free
of the gas species to be analyzed. If possible, the calibration gas should
be the background gas used in your application.
Note: This instrument was assembled and calibrated at the
factory using a specific background gas determined at the
time of purchase to be representative of the customer’s
application. Specific data has been pre-programmed into
the transmitter that is used by the system to linearize the
output signal generated by the sensor. If a different gas is
used, the resulting output signal may not be linear with
concentration. You also may experience difficulty in
Teledyne Analytical Instruments 19