Teledyne LGA-3500 - Laser Gas Analysis system - Manual (Page 58)

Operation Model 3500
Teledyne Analytical Instruments 44
• Con. output--20mA: The measured gas concentration output is in
the form of 4-20mA. Con. output--20mA is the gas concentration
value corresponding to 20mA.
Figure 4.20 Concentration Output Menu
The buttons on this menu refer to:
4mA: Set the corresponding gas concentration (0-
99.9999)% when the gas concentration output signal
is 4mA.
20mA: Set he corresponding gas concentration (0-99.9999)%
when the gas concentration output signal is 20mA.
4. Purge Parameter Menu
On the Purge Parameter Menu (Figure 4.21), the selections are:
• Pur Len: Set the purging path length (Lf2+Lf1+Lb1+Lb2, Figure
4.22).
• Pur. Temp: Set the purging gas temperature.
• Pur. Con.: Set the concentration of gas under test in the purging
gas.