Teledyne 4020 - Hydrocarbon analyzer User Manual
Page 78
Operation Model
4020
Teledyne
Analytical
Instruments
62
While in span calibration, the screen will display as:
with a similar display for a zero calibration except the zero valve will be
indicated as open (“ZERO ZEROV”).
4.6.16.4
O
BSERVING THE GAS
S
TREAM
C
ONCENTRATIONS
The actual gas concentrations of the gas streams can be observed
using two different methods:
1. Use the USER SELECT option of the VALVE
SELECTIONS menu and choose the appropriate valve to
open from the second line of the display. Then return to
Analysis mode by repeatedly pressing <Escape> and observe
the concentration of that stream on the display.
Note: With this technique, the alarms are not suppressed and
depending on the gas and the alarm setpoint, it could
trigger an alarm.
2. Use the DEFAULT option of the VALVE SELECTIONS
menu and select the SPAN (or ZERO) function from the
MAIN MENU. With the SPAN (or ZERO) function
selected, select MANUAL FINISH from the first line of the
display on the SPAN or ZERO submenu. The display will
show:
Or