ATI
PQ45P pH System
Part 5
– Operation
17
O&M Manual
Rev-B (7/15)
4.71 Keys
All user configurations occur through the use of four membrane keys. These keys are used as
follows:
MENU/ESC
To scroll through the menu section headers or to escape from anywhere
in software. The escape sequence allows the user to back out of any
changes in a logical manner. Using the escape key aborts all changes to
the current screen and backs the user out one level in the software tree.
The manual will refer to this key as either MENU or ESC, depending
upon its particular function. This is also the ON button.
UP (arrow)
To scroll through individual list or display items and to change number
values.
LEFT (arrow)
To move the cursor from right to left during changes to a number value.
ENTER
To select a menu section or list item for change and to store any change.
4.72 Display
The large custom display provides clear information for general measurement use and user
configuration. The display contains a back-light to allow good visibility under any conditions. In
the default mode of operation, the back-light will come on when any key is pressed and will
remain on for about 30 seconds after a key has been pressed. The back-light can be turned on
or off in the DIAG menu.
There are three main areas of the display: the main parameter display, the secondary message
line, and the icon area.
Main Parameter
During normal operation, the main parameter display indicates the
present process input with sign and units. This main display may be
configured to display any of the main measurements that the system
provides. During configuration, this area displays other useful set-up
information to the user.
Lower Line
During normal operation, the lower line of the display indicates user-
selected secondary measurements that the system is making. This also
includes calibration data from the last calibration sequence and the
transmitter model number and software version. During configuration,
the lower line displays menu items and set-up prompts to the user.
Finally, the lower line will display error messages when necessary. For a
description of all display messages, refer to 8.3 Display Messages.
