PART THREE - OPERATION
SECTION 1 - USER INTERFACE
Model P53 pH/ORP Analyzer (universal-mount 1/2 DIN)
Rev. 6-501
32
P A R T T H R E E - O P E R A T I O N
S
ECTION
1
1.1 Display
1.2 Keypad
The user interface consists of an LCD display and a keypad
with
MENU
,
ENTER
,
ESC
,
Õ
Õ
,
Ö
Ö
,
×
×
,
and
Ø
Ø
keys
.
By using the keypad, you can display three types of
screens:
•
MEASURE Screen:
The normal display mode which
shows measured values. The measured pH (or ORP) is
always shown on the display’s main middle line. Pressing
the
Ø
Ø
or
×
×
key
changes the display’s bottom auxiliary
line (in reverse video) to show these other measurements:
➥
Measured temperature (
°
C or
°
F)
➥
Analog Output 1 value (mA)
➥
Analog Output 2 value (mA)
An example of a typical MEASURE screen is:
On the MEASURE screen’s top line, Relay A, B, C, and D
annunciators will appear when their relay operational
state changes. When a relay overfeed timer is used and
it has “timed out,” the respective relay annunciator con-
tinuously blinks until the overfeed condition is resolved.
•
MENU Screens:
These top-level and lower-level (sub-
menu) screens within the three main branches of the
menu tree are used to access edit/selection screens for
configuration. (EXIT screens at the end of each menu
branch enable you to move up one level in the menu tree
by pressing the
ENTER key
. This is functionally the same
as pressing the
ESC key
.)
•
Edit/Selection Screens:
These screens enter values/
choices to calibrate, configure, and test the analyzer.
The keypad enables you to move throughout the analyzer
menu tree. The keys and their related functions are:
1.
MENU key:
Pressing this key always displays the top of
the menu tree (“MAIN MENU” selection screen). To
USER INTERFACE