Xylem TB500 ONLINE TURBIDITY ANALYZERS - Manual (Page 20)

TB500 (2/07)
Rev. 1.0 16
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.
Note: 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
t and u 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 lower (LOLM) and upper
(UPLM) turbidity limits corresponding to the 4 mA and 20 mA output levels will be
displayed. The first prompt will be the turbidity limit assigned to the 4 mA output level:
Select the turbidity level to assign to the LOLM using the
t and u buttons.