Teledyne 4020 – Hydrocarbon analyzer (special version for automatic background gas switching) User Manual
Page 52
Operation Model
4020
Teledyne
Analytical
Instruments
34
Special functions setup
Calibrate analog output
Procedures for accessing and/or changing parameters as well as
analyzer operation are detailed in the sections to follow. In general, the
sequence of menus available on screen follow a logical course for setup
and operation. It is not required, however to follow this sequential path.
The user could, for instance, go directly to set an analysis range and then
program an offset to the current output for matching a range on the
user’s recording device. The only exception to this is when the
instrument is powered up. It will go through a diagnostic self-test
routine and, if programmed to do so, request a password to be entered
before allowing access to any function.
4.6.1 Default Parameters
The versatility of this analyzer usually results in significant changes
being made to parameters over the course of time to better suit a
particular application. Occasionally processes change requiring
alteration to alarms, filter settings etc. At some time, it may be
beneficial to reset the analyzer to the default conditions as it was when
shipped from the factory. Below is a listing of the default parameters
used in configuring your instrument:
Range/Application: Refer to the data sheet on the application
page found in the appendix of this manual
Range: Manual
Alarm Relays AL-1:Active, HI, 80 ppm, non-failsafe
Background gas O2, energized
Background Gas Selection: Auto
N
2
selected when Remote Zero is non-
energized
O
2
selected when Remote Zero is
energized
Zero: Auto disabled, every 7 days, at 12 hours
Span: Auto disabled, every 7 days, at 12 hours
Password: TAI