Teledyne 4020 – Hydrocarbon analyzer (special version for automatic background gas switching) - Manual (Page 84)

Operation Model 4020
Teledyne Analytical Instruments 66
Table 4-2: AL-2 Relay Status for MATCH and INVERT
Relay
Energized
Relay
De-energized
MATCH O
2
N
2
INVERT N
2
O
2
To change the logic of the AL-2 relay:
<▲▼> From the MAIN MENU, scroll to the BACKGROUND
GAS function using the UP/DOWN keys.
<Enter> Pressing activates the function and takes you to
the next screen.
<Enter> Press again to move the arrow to the second line
of the display.
<Enter> Use the key to move to the Match/Invert field.
<▲▼> Use the UP/DOWN keys to toggle between Match and
Invert.
<Enter> Use the key to accept the appropriate selection
when it is displayed.