Teledyne 4020 – Hydrocarbon analyzer (special version for automatic background gas switching) User Manual

Page 54

Operation Model

4020

Teledyne

Analytical

Instruments

4.6.4 Mode/Function Selection

When the analyzer is first powered up, a warm-up for a period

ranging from 1 to 16 hours will occur depending on the exact factory
configuration.

Note: The warm-up period may be bypassed by pressing

at the initialization screen.

The warm-up period is a crucial factor affecting the overall accuracy

for this instrument and should not be bypassed .unless the instrument
has only been off for a short period or for maintenance purposes. Check
Specific Model Information on page iii of this manual as well as any
accompanying Addenda for the specific warm up time required for your
configuration.

After warm-up, the instrument will undergo an initialization and self

diagnostic routine. Once this has been completed, the ANALYZE screen
(Analysis Mode) will appear. The ANALYZE screen is the only screen
of the Analysis Mode. It is also the default screen appearing whenever
the instrument is on and not in the warm-up phase, self testing routines
or purposely put into another mode of operation such as Setup Mode .
The analyzer will automatically return to the ANALYZE screen from
any other input screen whenever the instrument is idle with no buttons
pressed for approximately 20 seconds.

The MAIN MENU screen is the top level in a series of screens used

in the Setup Mode to configure the analyzer for the specific application.
The DOWN/ UP commands scroll through the options displayed on the
VFD screen. The selectable option appears between arrows. When you
reach the desired option by scrolling, the selection as described
below.

ESCAPE takes you back up the hierarchy of screens until you reach

the Analyze Mode. ESCAPING any further just toggles between the
MAIN MENU and the ANALYZE screen.

Note: The main menu or any sub menu will time out after

approximately 20 seconds, and return to the analyze
screen.

4.6.4.1

NALYSIS

ODE

This is the normal operating mode. The analyzer monitors the

concentration of the sample, displays the percent of the concentration in