-14-
7.0 Instrument Configuration (CONFIG mode)
The instrument has been designed to provide the ability to customize the instrument
according to needs at any time during normal operation. This mode has been split into
sub-menus to facilitate instrument configuration. This section describes how to use
each
of the sub-menus to configure the instrument. While in the configuration mode, the
instrument has a time-out feature that automatically returns the system operation to the
AUTO
mode after a fifteen (15) minute period.
Enter the
CONFIG
mode of the instrument by pressing the
MODE/EXIT
button until the
arrow beside
CONFIG
is illuminated, then press the
button.
To exit the CONFIG mode, press the
MODE/EXIT
button.
7.1 Selecting the Output (O/P)
The first configuration selection is the
O/P
. The selections are
4-20
for the 4-20 mA
output,
485
for the RS-485 and
OFF
if no outputs are required.
Select the desired output
by using the
and
buttons. Once the desired output has been set, press the
button
to accept it. The next prompts will depend on the output selected.
7.2 Setting the 4-20 mA
If the 4-20 mA output was turned on, prompts to set the 4mA
(4MA)
and 20mA
(20MA)
turbidity limits levels will be displayed. There is also a menu to adjust the error level
(ERLV
). The first prompt will be the turbidity limit assigned to the 4 mA output level:
Select the turbidity level to assign to the
4MA
using the
and
buttons.
The factory setting is 0.02 NTU.
Once the desired level has been set, press the
button to accept it.
The 4MA can be set higher than the 20 MA level to invert the output current if
required. This may be required to control a dosing pump
