Xylem CL500 ONLINE CHLORINE ANALYZERS - Manual (Page 19)

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 of no button pushes.
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 Setting the 4-20 mA Output
The first configuration selection is 4-20 for the 4-20 mA output. Select the either On or
OFF using the S and T buttons. Once the desired output has been set, press the button
to accept it. The next prompts will depend on the output selected.
If the 4-20 mA output was turned On, prompts to set the 4 mA (4MA) and 20 mA
(20MA) chlorine limits will be displayed. There will also be a menu to adjust the error
level (ERLV). The first prompt will be the chlorine limit assigned to the 4 mA output
level:
Select the chlorine level to assign to the 4MA using the S and T buttons.
Once the desired level has been set, press the button to accept it.
The 4MA can be set higher than 20MA level to invert the output current if
required. This may be required to control a dosing pump.
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