Teledyne 4020 – Hydrocarbon analyzer (special version for automatic background gas switching) - Manual (Page 55)

Total Hydrocarbon Analyzer Operation
Teledyne Analytical Instruments 37
the sample stream, and warns of any alarm conditions. Pressing any key
switches you into Setup Mode and brings up its main menu. Setup Mode
switches back to Analyze Mode if no controls are used for more than
twenty seconds.
4.6.4.2 S ETUP M ODE
The MAIN MENU consists of functions you can use to customize
and check the operation of the analyzer. Figure 4-3 shows the functions
available in the Model 4020. They are listed here with brief descriptions:

AUTO-CAL: Used to define and/or start an automatic
calibration sequence.

PSWD: Used to establish password protection or change the
existing password.

LOGOUT: Logging out prevents unauthorized tampering with
the analyzer settings.

MODEL: Displays Manufacturer, Model, and Software
version of the instrument.

SELF-TEST: The instrument performs a self-diagnostic
routine to check the integrity of the power supply, output
boards, cell and amplifiers.

SPAN: Set up and/or start a span calibration.

ZERO: start a zero calibration.

ALARM: Used to set the alarm setpoint and determine
whether the concentration alarm will be active or defeated,
HI or LO active, and failsafe or not.

RANGE: Used to set up three analysis ranges that can be
switched automatically. with auto-ranging or used as
individual fixed ranges.
 FILTER: This function sets the digital filter from 0 to 7, 0
being the fastest response time, and 7 being the slowest. The
default is 4.
 ANALOG-OUT ADJUST: Calibrate Analog Output