Chapter Three: Overview
Overview of Modes
79
Overview of Modes
There are three standard modes for the 146 unit: Normal, Leakage, and Setup. Two additional
modes are available if the optional Control board is installed: Control and Tuning. All
commands for all modes are accessible with the front panel keypad. Most commands are
accessible through the RS-232 communications port. Some operating conditions (such as valve
control functions), are also operable through hardwired connections on the rear panel.
When the 146 unit is powered up, it goes through a full screen LCD test, and all displays in the
front panel window light up. After roughly five seconds, the screen changes and the unit defaults
to Normal Mode.
How To Tell which Mode You Are In
Refer to Figure 21, page 78, for a sample figure of each mode. Each mode provides a main
display and three upper displays.
Normal Mode
The screen is not labeled.
Leakage Mode
Displays the
LEAKAGE
legend.
Setup Mode
Displays the
SETUP
legend.
Tuning Mode
Displays the
TUNING
legend.
Control Mode
Displays the five valve positions (
OPEN
,
AUTO
,
CLOSE
,
HOLD
, and
MANUAL
). When
entering Control Mode from Leakage, Tuning, or Setup Modes, the legends for those
modes continue to be displayed. It is the presence or absence of the complete valve
position list that indicates whether or not the 146 unit is in Control Mode.
How To Change from One Mode to Another
Use the [
DISPLAY MODE
] key to scroll through Normal, Leakage, Tuning, and Setup Modes.
Use the [
CONTROL MODE
] key to toggle in and out of Control Mode.
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